LUBA2005-042 - John Frewing (6) CAE O
S NO �6
MAILIKL 111E LAM/ UJL' nUAKU Ur Arratlto
OF THE STATE OF OREGON
JOHN FREWING, )
Petitioner ) LUBA No. 2005-042
vs. ) FIRST SUPPLEMENTAL
) RECORD AND FIRST
CITY OF TIGARD, ) SUPPLEMENTAL INDEX
Respondent. )
) _
FILED
COURT OF APPEALS
OCT 1 7 2005
aY utt'
!a4117 fI *. $ 03.95°
I
BEFORE THE LAND USE BOARD OF APPEALS
OF THE STATE OF OREGON
JOHN FREWING, )
Petitioner )
)
) LUBA No. 2005-042
vs. )
) FIRST SUPPLEMENTAL
) RECORD AND FIRST
JOSEPHINE COUNTY, ) SUPPLEMENTAL INDEX
)
Respondent. )
)
INDEX
1. Public Improvement Design Standards S1
2. Letter dated November 15, 2004 from C. Koback of Davis Wright Tremaine LLP to
Morgan Tracy of City of Tigard S60
DATED this 20 day of April, 2005.
RAMIS CREW CORRIGAN & BACHRACH, LLP
Iii .r _ ;rl�
Gary Fir- •ne, OSB #87221
Attorney or Respondent City of Tigard
Page 1 -FIRST SUPPLEMENTAL RECORD AND FIRST SUPPLEMENTAL INDEX
TABLE OF CONTENTS
PAGE
PREFACE 1
A. GENERAL 2
B. PROVIDING FOR FUTURE DEVELOPMENT 3
C. PLAN REVIEW SUBMITTAL REQUIREMENTS 3
1. General 3
2. Design Plan Format 3
2.1 Plan View 4
2.2 Profile View 5
3. Site Grading Plan 6
4. Drainage Calculations 6
5. Review Procedure 6
6. Pre-construction Conference 6
7. As-Built Drawings 7
8. Other Utilities and Agencies 7
9. Easements 7
10.Traffic Control Plan 7
11.Performance Assurance 7
D. STREET AND ROAD REQUIREMENTS 9
1. General 9
2. Horizontal Alignment 14
3. Vertical Alignment 15
4. Intersections 15
5. Cul-de-sacs, Turnarounds, Stub Streets 16
6. Standard Curb, Curb and Gutter, Sidewalks 16
7. Driveways 16
8. Cross Section 16
9. Bikeways 16
10.Subsurface Drainage 17
11.Transitions 17
12.Soil Testing 17
13. Final Lift of Pavement 18
14. Private Streets 18
15.Street Lighting 18
16.Barricades and Guardrails 18
17.Street Striping 18
E. EROSION CONTROL 19
F. PUBLIC SANITARY SEWER AND STORM SYSTEM DESIGN 19
1. Standard Design Specifications 19
2. Sewers in Easements 19
3. Additional Storm Drain Requirements 19
4. Additional Sanitary Sewer Requirements 19
Revised July15,1998
S2
G. WATER DISTRIBUTION 21
1. General 21
2. Design 21
3. Materials 22
4. Installation 22
5. Cross Connection Control and Backflow Assemblies 23
6. Disinfection 23
7. Easements 23
8. Repair of any Damage to the City's Facilities 24
9. Relocation Design Work 24
10. Pressure Testing 24
H. SURVEYING 26
1. General 26
2. Existing Survey Monuments 26
3. New Survey Monuments 26
I. STRUCTURAL DESIGN 27
J. DESIGN MODIFICATIONS 27
1. General - Request to Modify Specifications/Standards 27
2. Modification Process 27
K. CONSTRUCTION INSPECTION 28
1. General 28
2. City Activities 28
3. Inspecting Engineer's Activities 28
APPENDIX A - Maps Available 31
APPENDIX B - Developer - Engineer Agreement 32
APPENDIX C - Plan Submittal Check List 35
APPENDIX D - General Conditions 38
APPENDIX E - Water Construction Notes 41
APPENDIX F - General Notes - Grading Plan Permits 43
APPENDIX G - Compaction Requirements 44
• APPENDIX H - Public Improvement Drawing Circulation List 46
APPENDIX I - Inspection Requirements 47
APPENDIX J - Subdivision Compliance Agreement 48
APPENDIX K - Subdivision Public Improvements- Performance Bond 52
APPENDIX L - Project Completion Requirements For Maintenance Status 53
APPENDIX M - Abbreviations 54
APPENDIX N - Standard Details 56
•
Revised July 15, 1998
S3
PREFACE
The City of Tigard Public Improvement Design Standards have been developed to provide a
uniform set of standards and procedures to assist the City and private consulting engineers in
coordinating, processing and constructing public improvement projects. The Washington
County Uniform Road Improvement Design Standards have been used as a guide in creating
these standards. These standards are intended to result in the construction of public facilities,
which will provide an adequate service level for the present as well as for future development.
The form has been kept brief and no attempt has been made to cover all possible situations or
to provide detailed explanations. This manual is intended to be read with the Tigard CDC
(Community Development Code) and Chapters 12 and 15 of TMC (Tigard Municipal Code).
It is anticipated that revisions to the design standards will be made from time to time. The date
appearing on the bottom of each page is the date of the latest revision.
Revised July 15,1998
S4
A. GENERAL
1. These standards shall apply to all improvements within the existing and proposed
right-of-way and easements, to all improvements to be maintained by the City, and to
all improvements for which the Development Code requires approval by the City.
These standards are for designers and developers in preparing their plans and for
City staff in reviewing plans. Where minimum values are stated, greater values
should be used whenever practical; where maximum values are stated, lesser values
should be used whenever practical.
2. Requests for variances to these standards shall be based on topography, right-of-
way, geography, or existing physical conditions, which impose an economic hardship
on the applicant. Requests must show that the variance will not compromise safety
or cause an increase in maintenance.
3. The 1990 Standard Specifications and Drawings for Public Works Construction of the
Oregon Chapter of the APWA (American Public Works Association), as currently
modified, are hereby adopted as the physical standards for the construction of streets
and related work, sewers, storm drains, water lines, and structures, except as
provided herein or by amendment within each contract. APWA manuals can be
purchased from KCM, 7110 SW Fir Loop, Tigard, Oregon 97223-8022, Phone No.
503-684-9097, Fax No. 503-598-0583.
4. The current USA (Unified Sewerage Agency) standards and specifications, as
adopted by ordinance, are additional physical standards for the design and
construction of sanitary sewers and storms drains. Manuals can be obtained by
calling USA at 648-8621.
5. All other utility improvements, including telephone, electrical power and lighting, gas,
and cable TV, shall meet the current standards of the appropriate agency as well as
City standards.
6. All other work not covered by the above standards shall conform to the current
Oregon Department of Transportation Standard Specifications for Highway
Construction and Standard Drawings for Design and Construction.
7. Standards for the construction of water facilities shall be in accordance with American
Water Works Association standards except as provided herein.
Revised July 15,1998
S5
B. PROVIDING FOR FUTURE DEVELOPMENT
All public improvements shall be designed as a logical part of the development of the
surrounding area. Storm sewers and sanitary sewers shall be sized to accommodate the
entire drainage basin, which they will ultimately serve. Utilities and street improvements
will be extended to the boundaries of the development for future extensions to the
adjoining areas. The City Engineer may require oversizing of utility lines to
accommodate future growth of the City.
Where existing City utility lines do not adjoin the proposed development, the developer
will be required to extend the lines to the development as necessary. Where existing
roadway improvements do not extend to the proposed development, the developer may
be required to improve the roadway to the development.
C. PLAN REVIEW SUBMITTAL REQUIREMENTS
1. General
All items should be submitted with a letter of transmittal addressed to the
Engineering Department and specifying the requested action. Items submitted for
Building Permits should not be included.
Review of public improvement plans is initiated by the submittal of plans that are at
least 95% complete. Following review, the plans will be returned approved or with
comments. In order to be entitled to further review, the applicant's engineer must
respond to each comment of the prior review (except that request may be made
that requirements as to form of the submittal, such as drafting, not necessary to
further review of the plans, be delayed until issues of design are resolved). All
submittals and responses to comments must appear throughout to be a bona fide
attempt to result in complete plans. In general, the submittal shall include plan and
profile for streets, water, storm drainage and sanitary sewers, storm drainage
calculations, storm drainage basin map, sanitary sewer basin map, erosion control
plan, utility and outside agency notification and verification, materials quantity and
cost estimate, and may also include a traffic study, legal descriptions and a traffic
control plan.
See Appendix C for a complete list of potential plan submittal items.
2. Design Plan Format
The plans shall be submitted on sheets 24" x 36".
Vicinity Maps shall be located on the first sheet of all plans and shall show the
location of the project in respect to the nearest major street intersection.
A north arrow shall be shown on each plan view sheet of the plans and adjacent to
any other drawing which is not oriented the same as other drawings on the sheet.
The preferred orientation of the north arrow is up or to the right on the plan sheet
with stationing from left to right.
The scale shall be 1" = 2', 4', 5', or 10' vertically and 1" = 10', 20', 40', 50' or 100'
horizontally for all drawings except structural drawings. The scale of corresponding
sheets shall be the same.
Revised July 15,1998
S6
Letter size shall not be smaller than 0.10 of an inch high.
All detail drawings, including standard drawings, shall be included in the drawings.
The location and elevation of a National Geodetic Survey, United States Geological
Survey, State Highway, Washington County, or City of Tigard benchmark shall be
shown. Temporary benchmarks shall be shown or referenced on the plans.
A title block shall appear on each sheet of the plan set and shall be placed in the
lower right-hand corner of the sheet, across the bottom edge of the sheet or across
the right-hand edge of the sheet. The title block shall include the name of the
project, the engineering firm, the sheet title and the owner if not shown on the first
sheet.
The seal of the Registered Professional Engineer responsible for preparation of the
plans shall appear on each sheet.
2.1 Plan View
Plan Views shall show the following where applicable:
Right-of-way, property, tract, and easement lines.
Subdivision name, lot numbers, street names and other identifying labels.
New street names are subject to the approval of the City and Washington
County.
Location and stationing of existing and proposed street centerlines and curb
faces.
Horizontal curve data of street centerlines and curb returns.
Centerline stationing of all intersecting streets; use existing stationing where
available.
Utilities and vegetation in conflict with the construction or operation of the
street and drainage facilities. Vegetation to include trees greater than 6
inches in diameter and landscape plantings.
Relocated utilities and other relocated facilities.
Location, stationing, and size of drainage facilities. Drainage facility stationing
shall be located in relationship to the street stationing at all manholes or other
key locations. Show drainage facilities above and below the project to
illustrate conditions affecting the design.
Floodplain and wetland boundaries.
Location and size of water mains, sanitary sewers services and
appurtenances. Identify type and location of cross-connection control. Each
manhole shall be identified with a number provided by the Engineering
Department and stationed to facilitate checking the plans with the profile.
Match lines with sheet number references.
Revised July 15, 1998
S7
Tops of curb elevations along curb returns at quarter-points or curb return
profiles.
Location of the low points of street grades and curb returns.
Sidewalk ramp locations.
Crown lines along portions of streets, transitioning from one typical section to
another.
Location and description of existing survey monuments, including but not
limited to, section corners, quarter corners and donation land claim corners
within the limits of the work area.
Legend.
Any additional information required by the City.
2.2 Profile View
Profile Views shall show the following where applicable:
Stationing, elevations, vertical curve data and slopes for center of streets or
top of curbs. For offset or superelevation cross-sections, both curbs shall be
profiled. The centerline of the street and ditch inverts shall be shown where
curbs are not to be constructed.
Original ground along the centerline and if necessary at the edges of the right-
of-way if grade differences are significant.
Extension of the profile of streets that will be extended in the future (stub
streets). The extended profile shall be at least 300 feet for local and minor
collector streets and as required for streets with higher classifications and be
designed to be compatible with the restraints of the terrain.
The top of curb for all cul-de-sacs and intersection curb returns or show
elevations at quarter points on plan view.
Storm and sanitary sewer profiles shall show the following information unless
noted elsewhere:
(a) Location of manholes and other appurtenances with each manhole
numbered and stationed
(b) Profile of existing and proposed ground surface and sewer inverts
specified at each manhole.
(c) Size, material, and class of pipe. Slope and length of sewer and
class of backfill measured between centerline of consecutive
manholes.
(d) Profile of hydraulic grade line for the 25-year storm.
Revised July 15,1998
S8
Existing drainage facilities, including offsite facilities, upstream and
downstream that affect the design (e.g., downstream restrictions that back
water onto project site).
Profiles for ditch and creek flow lines shall be extended as appropriate to
illustrate conditions affecting the design beyond the project, both upstream
and downstream. Typical cross sections shall also be submitted.
All proposed water, sanitary sewer, and storm pipes crossing the profile and
any existing utilities, which potentially are in conflict with construction of the
improvements.
3. Site Grading Plan
A site grading plan is required by the Tigard Community Development Code as part
of the application for subdivisions, site development permits, and conditional use
permits which may be covered by these standards. The grading plan shall show
proposed finished floor and building pad elevations, the existing and proposed
contours extended beyond the improvement and erosion control facilities.
All subdivision projects shall require a proposed grading plan prepared by the
design engineer. The engineer will also be required to indicate which lots have
natural slopes between 10% and 20%, as well as lots that have natural slopes in
excess of 20%. This information will be necessary in determining if special grading
inspections will be required when the lots develop. The design engineer will also be
required to shade all structural fill areas on the construction plans. In addition, each
homebuilder will be required to submit a specific site and floor plan for each lot.
The site plan shall include topographical contours and indicate the elevations of the
corners of the lot. The builder shall also indicate the proposed lot elevations at the
four corners of the proposed building.
4. Drainage Calculations
Drainage calculations shall be presented in a clear, concise and complete manner
on calculation forms. These calculations shall address all runoff into the drainage
system. Areas contributing flow to each inlet must be computed separately and
each inlet with contributing area shall be designated and shown on an
accompanying contour map work sheet. The drainage basin shall be shown on 1" =
100' topography sheet available from the City.
Hydraulic grade line and initial time of concentration calculations with charts and
nomographs used shall also be included with drainage calculations.
5. Review Procedure
Contact the Engineering Department for the required number of plan sets to submit.
Incomplete submittals will be returned with deficiencies noted. Upon completion of
the preliminary review, the City will return one set of plans with required revisions.
Once the City has approved the revisions, the design engineer will be notified of the
required number of sets to be submitted for stamping. The City will expect the
design engineer to circulate a set of plans to affected utility companies for their
review. The design engineer shall submit proof that the plans have been circulated.
6. , Pre-construction Conference
Revised July 15,1998
S9
A pre-construction conference will be scheduled before beginning construction.
The meeting is to include the developer's representative, engineer, and prime
contractor. The purpose of the conference is to discuss the construction schedule
and items of the work, which require special coordination.
7. As-Built Drawings
As-built drawings are required whenever the work results in new or modified public
improvements and shall describe all revisions to the previously approved
construction plans. Submit previously approved as-built drawings on 3 mil minimum
thickness mylar. If the construction drawings are prepared with the use of CAD, a
diskette of the drawings in "DWG" or "DXF" format shall be provided in addition to
the hard copy mylar.
8. Other Utilities and Agencies
The applicant is responsible for the coordination with the various utilities and
agencies during design and construction. The City will require letters of transmittal
or other written verification that the appropriate utilities or agencies have been
provided with plans and have had an opportunity to comment upon the proposed
improvements; this written verification shall be submitted with the plans. The
utilities and agencies may include those shown in Appendix G.
After the first City redline, the applicant shall obtain all utility company comments
and plans and shall show such improvements on the plans prior to City approval.
9. Easements
Residential subdivision utility easements shall include a six foot utility easement
along all front lot lines, as shown on Figure D-1, as well as easements for utility
vaults, light poles, mail boxes, etc., that are not within a right-of-way.
Public utility easements created by separate instruments shall be on forms provided
by the City. Once executed, return to the City for review. If approved, the City will
cause the easement to be recorded and will return a copy.
10. Traffic Control Plan
The applicant's engineer shall submit a traffic control plan for approval at least five
days before beginning construction if the work will affect movement or safety of
vehicles, bicycles or pedestrians.
- • Traffic control devices shall meet the standards of the current Manual of Uniform
Traffic Control Devices, available from the Superintendent of Documents, US
Government Printing Office, Washington, DC 20402.
All traffic control devices shall be continuously maintained, including nights and
weekends.
11. Performance Assurance
Before the construction plans are approved, performance assurance shall be
provided to guarantee faithful and complete performance of the work in accordance
Revised July 15,1998
S10
with a Subdivision Compliance Agreement (or similar agreement for other types of
projects) prepared by the City. A sample is shown at Appendix J.
Optional kinds of performance assurance are permitted by ordinance. Assurance
forms will be prepared and provided by the City. A sample of the City's bond form
is shown at Appendix K.
The bond amount shall be equal to 100% of the approved estimate of the
applicant's engineer. This amount may be reduced to 10% during the warranty
period. During construction, the City Engineer may authorize partial releases of the
performance assurance in accordance with the following:
a. Only one request for partial release will be considered each month.
Releases will be made upon written request from the developer
accompanied by adequate documentation of completion of work.
b. Releases will be considered for each individual line item at the time that the
line item is 100% complete, including all required testing and documentation.
The line items shall be as outlined in the assurance document.
c. If a line item is fully completed for a portion of the project but other portions
remain incomplete, a partial release will be made for the completed portion if
it forms a logical, usable complete unit. For example,for a project requiring
10,000 feet of sewer, in a month when the first 3,000 feet of sewer has been
fully completed (including manholes and testing) a request could be
considered for partial release of the portion of the assurance representing
3,000 feet of sewer.
d. In addition, releases will be considered upon partial completion of certain
line items as outlined below:
(1) Site Preparation/Restoration: 80 percent of the site preparation line
item will be released when clearing and grubbing are completed, if
all required erosion control is in place with adequate maintenance.
(2) Sanitary Sewer and Storm Sewer: 60 percent of the sewer line item
will be released when the pipeline is completed, including backfill
and air testing; and manholes, cleanouts, catch basins and other
structures are completed except for the grouting of the frames and
covers.
In evaluating subsequent requests for partial release, the City may reconsider the
items previously released and withhold additional amounts for items where the
criteria for partial release are no longer satisfied. For example, if funds have been
released for site preparation but adequate maintenance of erosion control has not
been provided, the funds previously released for site preparation may be deducted
from any subsequent partial releases.
Revised July 15,1998
S11
D. STREET AND ROAD REQUIREMENTS
1. General
The Tigard Comprehensive Plan Transportation Map establishes the classification
of arterials and collectors; industrial and commercial streets are established by the
surrounding land use designation.
Figure D-1 summarizes the improvement standards for each road classification.
The volume of traffic shall determine the number of travel lanes for arterial and
major collector roads. The City may require additional turning lanes or a traffic
engineer's report evaluating the need for additional turning lanes.
Additional pavement and right-of-way width may be required to accommodate
turning lanes, parking, and bike lanes.
The private engineer may submit an alternate pavement design in lieu of the
standard section and a justification by providing a soils report.
Projected traffic loadings or poor soil conditions may require a special pavement
design section.
Portland Cement Concrete pavements may be substituted for the typical asphaltic
concrete pavement section. The applicant shall provide the design of the PCC
section.
Revised July 15,1998
S12
• FIGURE D-1
CITY OF TIGARD
TYPICAL ROAD PAVEMENT SECTION
8' P.U.F. ---- - $ - - o P.U.E.
G F. F C r--�- U—a^a--E D C _+-F G i
i .•
NO SCALE
R/W PAVED CENTER T PIICAL (MIN.)
CLASSIFICATION WIDTH WIDTH CURB TRAVEL TURN AVERAGE DESIGN PAVEMENT SIDEWALK SHOULDER
(MIN.) (MIN.) LANE LANE LANE TRAFFIC C SPEED SECTION (MIN.) (MIN.)
A B C D E F G
TRAFFIC DESIGN
ARTERIAL 60' - 90' STUDY 14' 12' 12' > 6,000 45 REQUIRED 8 1.5
REQUIRED
4" AC
MAJOR 16'44'80'60'60 - 80 44 16 --- 12' 1,500 - 35 3 4"-0") 6'
CCLLE!�TOR 10,000 (2 1.5'
12" (2 -0")
MINOR 4" AC
COLLECTOR 60' 40' 14' --- 12' 5001- :5 3" (.3/4"-0") 5' 2.5'
'.0(,0 12' (2"-0")
LOCAL 4" AC
ra i.o.::::,:•.,. 50' 34' 17' --- --- < 1,500 25 3„ (3/4"_0.,) 5. 2.5'
.'`, 12" (2"-0")
LOCAL 50' 32' 16' --- --- < 1,500 3" 1/2" AC
. , __....... . 46' 28' 14' --- --- < 500 25 2" (3�'4"-0") 5' 2.5'
42' 24' 12' --- --- < 200 7" 2'-0")
NOTE: RESIDENTIAL STREET WIDTH TO BE DETERMINED BY APPROVING AUTHORITY PER CDC 18.164.030.E.1
. ,
- S13
==� ��^°
FIGURE D-2
CITY OF TIGARD
UTILITY LOCATION
n/w «/W
-~� e' P.U.E. VARIES ------- --~4 8' P.U.E. ~"—
STREET WIDTH
| | | ' �
~_ _~_"_ _~ ~_�
---
SIDEWALK SIDEWALK ----
'r,��= ^-'-'-,^
0
O WATER
STORM/) STORM u SEWER
SEWER
SANITARY
NOTES
REFER TO UNIFIED SEWAGE AGENCY DESIGN AND CONSTRUCTION STAwD�RDS FOR OTHER LOCATION
CRITERIA FOR SANITARY AND STORM SEWERS,
'
.
~
' ° '
TABLE D-1
DESIGN SPEED/MINIMUM CENTERLINE RADIUS
(Standards below are proposed;
See CDC at 18.164.030 M 1 a for current standards)
DESIGN MINIMUM CENTERLINE RADIUS
SPEED (Centerline Crown)
25 MPH 166'
30 MPH 275'
35 MPH 415'
40 MPH 710'
45 MPH 930'
NOTES:
The use of superelevation will be permitted only if approved in advance. Where permitted,
calculations shall be provided for the proposed centerline radius. Street curves should be
designed for a maximum superelevation rate of 0.04. If terrain dictates sharp curvature, a
maximum superelevation of 0.06 is justified if the curve is long enough to provide an adequate
superelevation transition. The minimum superelevation shall be 0.01.
Exceptions to the centerline radius request will be considered for cul-de-sacs and low volume,
local streets which serve only the immediate residences and are not a through street. See
items A.2 and J.2.
TABLE D-2
DESIGN CONTROLS FOR CREST VERTICAL
CURVES BASED ON STOPPING SIGHT DISTANCE
DESIGN SPEED K
25 MPH 20
30 MPH 30
35 MPH 40
40 MPH 60
45 MPH 80
50 MPH 110
55 MPH 110
Revised July 15,1998
S15
TABLE D-3
DESIGN CONTROLS FOR SAG VERTICAL CURVES BASED ON STOPPING
SIGHT DISTANCE
K K
DESIGN SPEED W/O STREET LIGHTS WITH STREET LIGHTS
25 30 13.4
30 40 19.4
35 50 26.3
40 60 34.4
45 70 43.5
50 90 53.8
55 100 65.1
WHERE K= L = Feet
A Percent
A= Algebraic Difference in grades, percent.
L = Length of vertical curve, feet.
SOURCE OF TABLE D-1, 2, & 3: A Policy on Geometric Design of Highways and Streets,
AASHTO, 1984, pp. 177-316.
Revised July 15,1998
•
S16
TABLE D-4
INTERSECTION TURNING RADII (FEET)
Minimum radius along edge of pavement or curb
Major Minor Commercial
Street Arterial Collector Collector Transit* Industrial Local
Classification Street Street Street Street Street Street
Arterial
Street 55 40 35 40 40 30
Major
Collector 40 40 35 40 40 30
Street
Minor
Collector 35 35 30 35 30 25
Street
*Transit
Street 40 40 30 40 40 25
Commercial
Industrial 40 40 30 40 40 25
Street
Local
Street 30 30 25 25 25 25
If bike lane or on-street parking exists, above radii may be reduced by five feet.
*Streets along Tri-Met bus routes.
2. Horizontal Alignment
Horizontal centerline alignments of improvements shall be parallel with the
centerline of the right-of-way.
Centerline of the proposed street extension shall be aligned with the existing street
centerline.
Horizontal curves shall meet the minimum radius requirements as shown in Table
D-1.
Streets intersecting an arterial or collector street but not continuing through the
arterial or collector street along the same horizontal alignment (i.e., a staggered or
tee intersection) shall not be located within 300 feet of another street intersecting
the opposite side of the arterial or collector street. Local street intersections shall
have a minimum separation of not less than 125 feet. Intersection spacing shall be
measured from the centerlines of the streets.
Revised July 15,1998 _
S17
3. Vertical Alignment
Minimum tangent street gradients shall be 0.5 percent along the crown and curb.
Grade shall not exceed ten percent on arterials, 12 percent on collector streets, or
12 percent on any other street (except that local or residential access streets may
have segments with grades up to 15 percent for distances of no greater than 250
feet).
Streets intersecting with a greater functional classification street or streets intended
to be posted with a stop sign shall provide a landing averaging five percent or less.
Landings are that portion of the street within 20 feet of the edge of the intersecting
street at full improvement.
Grade changes of more than 1 percent shall be accomplished with vertical curves.
Street grades, intersections and superelevation transitions shall be designed to not
allow concentrations of storm water to flow across travel lanes.
Offset crowns shall conform to Washington County Standard Drawing M-403.
Streets intersected by streets not constructed to full urban standards shall be
designed to match both present and future vertical alignments of the intersecting
street. The requirements of this manual shall be met for both present and future
conditions.
Vertical curves shall conform to the values found in Tables D-2 and D-3.
Slope easements shall be dedicated or obtained for the purposes of grading
outside of the right-of-way.
4. Intersections
An intersection is defined as being the meeting of two streets having at least three
legs.
The interior angle at intersecting streets shall be kept as near to 90 degrees as
possible and in no case shall it be less than 75 degrees. A horizontal tangent
section shall be carried a minimum of 25 feet each side of intersecting right-of-way
lines.
Curb radii at intersections shall be as shown in Table D-4 for the various functional
classifications. The right-of-way radii at intersections shall be sufficient to maintain
at least the same right-of-way to curb spacing as the lower classified street.
Sidewalk access ramps shall be provided at all corners of all intersections where
crossing is permitted, regardless of curb type, and shall conform to the City's
standard drawing.
Revised July 15,1998
S18
5. Cul-de-sacs,Turnarounds, Stub Streets
The following specifies the minimum requirements for cul-de-sacs, and turnaround
areas. Other turnaround geometrics may be used when conditions warrant and City
Engineer approves the design and application of its use.
The minimum curb radius within the bulb shall be 40 feet. The minimum curb radius
for transitions into cul-de-sac bulbs shall be 25 feet and the right-of-way radius shall
be sufficient to maintain the same right-of-way to curb spacing as in the adjacent
portion of the road. Cross slope is limited to 5 percent.
Stub streets allow for future street extensions. A temporary, all weather turn around
shall be provided at the end of stub streets that exceed 150 feet in length.
Barricades shall be place at the end of all stub streets.
6. Standard Curb, Curb and Gutter, Sidewalks
Curb or curb and gutter shall be provided with sidewalks on both sides for all road
classifications. Standard curbs may be used in areas with slopes greater than 1
percent gradient. Curb and gutter shall be used for grades of 0.5 percent to 1
percent. Where required the curb and gutter shall extend to the next intersection.
Water meters, utility poles etc. are not permitted within sidewalks.
7. Driveways
Driveways shall conform to the City of Tigard Standard Drawing. Curb removal for
driveways shall be by saw cutting.
8. Cross Section
Local Street and Commercial/Industrial functional classifications shall have a 2
percent upward grading to the right-of-way line, a 5:1 upward or downward grading
within the public utility easement and no steeper than 2:1 up or down outside the
public utility easement.
Cross-slope of streets shall be not less than two percent or greater than five
percent. Wherever practicable, the crown of the street and top of curb shall have
the same elevation.
9. Bikeways
The City based on the Tigard Pedestrian/Bike Path Plan shall determine bikeway
- locations. Bikeway facilities shall meet the requirements of this document and the
American Association of State Highway and Transportation Officials publication,
Guide for Development of Bicycle Facilities. 1991, as amended and adopted by the
Oregon Department of Transportation.
A bikeway may be constructed adjacent to the curb within the pavement area.
Structural sections of bikeway facilities on streets shall conform to that of the street
or be integral with the curb. Bikeways not within a street shall be constructed upon
compacted subgrade that has been sterilized if an asphaltic concrete bikeway, to
one of the following pavement section designs:
Revised July 15,1998 _
S19
Four inches of asphalt concrete (full depth) or 2-1/2 inches of asphalt concrete with
4 inches of W-0 rock base, or 4 inches of Portland cement concrete.
Design standards regarding horizontal alignment, grade, sight distance,
intersections, signing, marking, structures, drainage and lighting shall conform to
the AASHTO standards. When bikeways are integrated with a curb all inlet grates
shall be designed to protect the bicyclist from the grate or opening.
10. Subsurface Drainage
Subsurface street drainage must be considered in the design of each street.
Subsurface drains shall be designed and constructed per the recommendations of
the soil report.
Subsurface drains shall connect and drain into the storm drainage system at catch
basins, curb inlets, gutter inlets, manholes or road side ditches. Surcharge from the
storm drainage system shall not be allowed to back up into the subsurface drains.
Alternative subsurface drainage measures may be used if approved by the City.
11. Transitions
Street width transitions from a narrower width to a wider width shall be designed
with a 3:1 taper. Delineators, as approved by the City, shall be installed to define
the configuration.
Street width transitions from a wider width to a narrower width or lane alignment
transition shall be designed with the length of transition taper as follows:
L =S x W: for S =45MPH or more
L =W x S2: for S less than 45
60
Where L = minimum length of taper(feet)
S = Design Speed (MPH)
W= EP to EP offset width
Delineators, as approved by the City, may be installed to define the configuration.
Maximum spacing of delineators shall be the numerical value of the design speed,
in feet (i.e., 35 foot spacing for 35 MPH).
In situations where a tapered transition cannot be provided, a barricade shall be
installed at the end of the wider section of the street and a taper shall be appointed
and delineated as approved by the City. The barricade shall conform to MUTCD
Standards.
12. Soil Testing
Soil testing may be required to determine the soil type and strength if a pavement
section design is requested due to high traffic loadings or variations in the existing
subgrade soils from the typical Tigard sandy silts.
Soil sampling and pavement design shall follow the guidelines in the Washington
County Uniform Road Improvement Design Standards, Section 210.
Revised July 15,1998
S20
13. Final Lift of Pavement
The top lift of asphalt concrete on a newly constructed local residential street will
generally not be permitted to be installed during the initial paving of the street. The
top lift shall be placed within one year of the conditional acceptance of the roadway
and no later than when 90 percent of the structures in the new development are
completed. Class "C" asphalt concrete, as defined by APWA Standard
Specifications, not less than 1-1/2" in thickness shall be applied. NOTE: The City
may require the full thickness of the asphalt concrete section to be placed
immediately.
14. Private Streets
The structural roadway sections for private streets shall be constructed to local
street standards.
15. Street Lighting
The City minimum streetlight illumination levels are to be in conformance with the
"An Informational Guide for Roadway Lighting," American Association of State
Highway and Transportation Officials, 1984. Standard luminaries for public
streetlighting must be of the type, spacing, and height as acceptable by PGE for
operation and maintenance purposes.
16. Barricades and Guardrails
Guardrail installation shall be based on information found in AASHTO publication
"Guide for Selecting, Locating and Designing Traffic Barriers."
Guardrails shall be designed and constructed per ODOT's "Standard Drawings for
Design and Construction."
Barricade installation shall be based on the MUTCD (Manual of Uniform Traffic
Control Devices). Basically red and white reflectorized Type III barricades shall be
used at the end of a street. White and black reflectorized Type III barricades shall
be used at the end of a street widening which does not taper back to the existing
pavement width. White and black reflectorized Type II barricades shall be used at
the end of the sidewalk or pedestrian/bike path.
17. Street Striping
The design engineer shall submit a street striping plan for projects involving street
- improvements. The striping plan and striping materials shall be in conformance with
the MUTCD and the manufacturer's specifications. Striping material shall match
either existing striping material on the roadway, or, in a case where no striping
exists, conform to one of the following:
For roadway improvements constructed to ultimate width, alignment and grade,
durable permanent pavement striping shall be used. The material shall be equal to
or better than Dura-Stripe (90 mils thick for longitudinal lines and 120 mils thick for
legends, arrows, crosswalks and stop bars), or inlaid 3M Stamark Pavement
Marking Tape (A420 for stop bars and crosswalks and A380 for lane lines, legends
and arrows). Inlaid tape shall be applied during the final rolling of asphalt with a
finish roller.
Revised July 15,1998
S21
For roadway improvements not constructed to ultimate width, alignment and grade,
or where the City Engineer determines durable permanent pavement striping should
not be used, painted permanent pavement striping shall be used. The materials
shall either be bead binder paint conforming to ODOT Specifications, thermoplastic
conforming to ODOT Specifications (for legends, arrows, crosswalks and stop bars
only), or PREMARK brand conforming to manufacturers specifications (for legends,
arrows, crosswalks and stop bars only).
All lane striping shall include reflector markers spaced 40 feet apart, except for turn
lanes and transition areas where the reflector spacing shall be 20 feet apart.
Crosswalk stripes shall be 12 inches wide, spaced 10 feet apart, and shall extend
across the entire width of the street.
Any striping, buttons or reflector markers damaged or tracked with asphalt outside
the limits of the project work area shall be restored to its original condition or
replaced as directed by the City Engineer at the permittee's expense.
E. EROSION CONTROL
Erosion control plans shall conform to "Erosion Prevention and Sediment Control Plans-
Technical Guidance Handbook, February 1994." Unified Sewerage Agency of
Washington County.
F. PUBLIC SANITARY SEWER AND STORM SYSTEM DESIGN
1. Standard Design Specifications
All public sanitary sewers and storm systems shall be designed in accordance with
USA (Unified Sewerage Agency) Design and Construction Standards Resolution
and Order No. as well as Washington County Uniform Road Improvement Design
Standards subsections 220.3 "Hydrology" and 220.4 "Hydraulics."
2. Sewers in Easements
Sewers within easements will be permitted only upon a showing of the infeasibility
of providing services from a line within a right-of-way. These sewers, where
permitted, will require a 12-foot wide access sufficient to provide adequate access
for maintenance vehicles.
3. Additional Storm Drain Requirements
Curved sewers are not permitted.
Where tee connections from catch basins to a main line are permitted by USA
Design and Construction Standards R&O No. 96-44, any existing or anticipated
upstream storm drains shall be without open culverts or other inlets not protected
with a grate.
4. Additional Sanitary Sewer Requirements
Revised July 15,1998
S22
4.1 Capacity
Design flows shall be determined by consideration of the following factors:
(1) Drainage basin to be served.
(2) Population within the area to be served, at the future time of full
development, based upon the Tigard Comprehensive Plan.
(3) Land use within the area to be served.
(4) Per capita sewage flow.
(5) Commercial, industrial, or institutional users to be served.
(6) Infiltration allowance.
In the absence of flow data or other reliable information, the design factors
from TABLE F-1 may be assumed. Appropriate peaking ratios should be
applied to determine flows
TABLE F-1
Wastewater Flow Design Criteria
Residential 70 gpcd
Commercial 1,000 gpad
Industrial 3,000 gpad
Institutional 500 gpad
Peak Annual Ill 1,000 gpad
Ref.: USA Master Plan Update, June 1985, Table 3.2
It is recommended that design calculations include estimates of average,
maximum and minimum daily flows. The submission of design calculations will
not ordinarily be required, but engineers should be prepared to substantiate pipe
sizes, layout, population estimates, land uses or other design assumptions as
may be requested.
4.2 Work on Existing Sewers
(1) Insert-a-Tee type couplings are required to connect side sewers to existing
concrete lines.
(2) A detail drawing showing the steps, bench, and proposed connection is
required for connections to existing manholes.
Revised July 15,1998
S23
4.3 Side Sewer Connection
(1) Channels shall be provided for each side sewer connected to a manhole.
(2) Side sewer connections at a cleanout are not permitted.
G. WATER DISTRIBUTION
1. General
These standards and Division 4 of the APWA Standard Specifications set forth the
requirements for the installation of water distributions facilities within the City's service
area. The Tualatin Valley Water District as shown on Map G serves a portion of the City.
Dead-end mains normally will not be allowed, but when permitted, a blowoff assembly will
be required. Water mains shall extend just outside the edge of pavement to facilitate
future extensions. City policy is to provide water service at a minimum of 50 psi.
Available pressure may fall outside of this range depending on geographic features
within a particular pressure zone. Developers will be responsible for construction of a
facility (i.e. vault to house pressure reducing valves (values to be provided by City) to
reduce design pressure when pressure exceeds 110 psi.
All work shall be in accordance with American Water Works Association standards.
2. Design
2.1 System Design
The City will provide required line sizes and connection points. Other required lines
shall be designed to supply the required fire flow, associated demands and future
development.
2.2 Component Location
Main Lines: South or East Side of street to the extent practical without crossing
centerline. Minimum cover over the pipe is 36 inches. The project engineer is
responsible for the design of the pipe to insure maximum pipe joint defection is not
exceeded.
Valves: Beginning and endings of curb returns at intervals that provide for the
isolation and purging of air from lines, in lengths not exceeding 500 feet, by
operating not more than three valves. Also install on line ends intended for future
extension.
Fire Hydrants: Generally at beginning or ending of curb returns and as required so
that no part of any single-family building is greater than 500 feet from a hydrant and
no part of any commercial, industrial or multiple-family building is greater than 250
feet from a hydrant, both as measured along the most practical accessible route as
determined by the Fire Marshall.
Revised July 15,1998
S24
3, Materials
General: All material shall be new and manufactured in USA (No rebuilt,
reconditioned or used material will be allowed) 10" and 14" pipe are not permitted.
Pipe: Ductile iron, Class 52, with Tyton joints. As manufactured by US Pipe
andFoundry, Pacific States Pipe.
Approved Alternate: American Darling Pipe, class 52 with push on type joints.
Valves: Resilient seat gate valves for 8" or smaller pipe and butterfly valves for
larger pipe.
Fittings: Cement lined ductile iron with mechanical joints to comply with AWWA
unless otherwise specified hereinafter, or approved by the City Engineer.
Fire Hydrants: Modern Mueller Centurion, # A-442; Mueller Centurion A423;
Waterous Pacer#WB67 or Clow Medallion #2646-5B, with:
6" MO; 51/4 " MVO; 3 Port (2—2'/z" NST hose connection and 1, 4-'/2 " NST
pumper connection); 1'/2 Pentagon operating nut; open left;
color yellow.
Fire Hydrant Assembly tee: MJ x 6"flg
gate valve: 6"flg x MJ
holding spool: 6" MJ x MJ or 6" Class 52 ductile iron with MJ restraints
(Megalugs by Ebba Iron Foundries)
Air and Vacuum Release Valves: APCO heavy-duty combination air release valve
as manufactured by Valve and Primer Corporation, Chicago, Illinois or equal.
Model No. 143C and 145C for 1" and 2" sizes respectively.
Sampling Stations: Eclipse No. 88 Sampling Station manufactured by Kupferle
Foundry, St. Louis, MO 63102. The sampling station shall be 2'-0" bury with a 3/4"
FIPT inlet, and a 3/4" unthreaded hose nozzle. All stations shall be enclosed in a
locatable, non-removable, aluminum-cast housing. When opened, the station shall
require no key for operation, and the water will flow in an all-brass waterway. All
working parts will also be of brass and be removable from above ground with no
digging. A copper vent tube (standard) will enable the station to be pumped free of
standing water to prevent freezing, and to minimize bacteria growth. The exterior
piping will be brass, and a 1/4" ball valve shall be provided in place of the 1/4"
petcock on the vent pipe.
4 Installation
All curbs shall be in place before beginning any work unless bedrock is
encountered.
The City will install services 2 inch or less. Provide installation location by marking
property corner with a hub and guard stake. The owner shall install larger services.
City will install all copper services and sampling stations before utility work and
placement of the final lift of asphalt. The City upon individual request and payment
, will install water meters by others (owners). All water meters connected to an
Revised July 15,1998
S25
irrigation system must have the proper Oregon State Approved backflow prevention
device (minimum of a Double Check Value Assembly) installed on the property side
of the meter. The backflow prevention device shall be installed and tested by
owner, with the results forwarded to Public Works, before water service can begin.
Upon completion of installation of the water system, advise the City of the total
construction costs to which will be added ten percent for City inspections, water
loss, overhead, administration, sampling, etc. and two percent for engineering
review, including "as-built" drawings, updating master map, intersection maps, etc.
Operation of valves is by Public Works only.
5. Cross Connection Control and Backflow Assemblies
All commercial, multi-family, industrial, and institutional services, regardless of size
shall have the proper Oregon State approved backfill prevention device (min.
double check valve assembly installed on the property side of the meter.
Backflow prevention in accordance with Appendix I and OAR 333-61-070 shall be
installed and approved before service will be provided.
The backflow prevention device shall be installed and tested by owner, with the
results forwarded to Public Works, before water service can begin.
6. Disinfection
Upon satisfactory completion of testing, the new mains and connections to existing
mains shall be cleaned and flushed with potable water prior to disinfection.
Flushing velocities shall be at least 2.5 feet per second. Disinfection shall be in
accordance with AWWA Standard C65-92, the State Health Division and City
requirements. The continuous feed method of disinfection shall be used.
Disinfecting mixture shall be a chlorine-water solution having a free chlorine residual
of 40-50 ppm. The disinfection mixture will be prepared by injecting a calcium
sodium hypochlorite and water solution in to the pipeline at a measured rate while
fresh (potable) water is allowed to flow through the pipeline so that the chlorine-
water solution is of the specified strength. Treated water shall be retained in the
pipeline long enough to destroy all nonspore-forming bacteria. Typical retention
period is 24 hours. At the end of the 24-hour period, the pipeline is to have a
chlorine level of at least 10 ppm. After chlorination, flush the water from the line
until the water throughout the pipeline is equal chemically and bacteriological to the
permanent source of supply.
Dispose of the disinfection water in an approved manner. Do not allow disinfection
water to flow into a waterway without adequate dilution or other satisfactory method
of reducing chlorine residuals to a safe level as mandated by DEQ. After disposal
and flushing of the disinfection solution, there will be another 24-hour retention
period prior to the taking of water samples for bacteriological testing.
Bacteriological tests will be taken by the City.
7 Easements
When it is not possible or practical to install the main within a dedicated public
street, an easement shall be provided. In general, a 15-foot wide easement will be
adequate where vehicular access is not necessary and 20-foot wide easement will
Revised July 15,1998
S26
be required if vehicular access is necessary. The easement will state that any
damage resulting from a mainline break in the easement will not result in liability to
the City.
8. Repair of any Damage to the City's Facilities
Repair of any damage to the City's facilities (including buried water lines, valve
boxes, meter boxes, combination air and vacuum release valves, etc.) shall be
made at contractor's expense. The City, at its option, may make the repair to
facilitate maintaining service. In this instance, the contractor will be billed for repairs
on a time and materials basis.
9. Relocation Design Work
Any relocation work within existing right-of-way that is a requirement of the
development, will be performed by the developer at the developer's expense.
10. Pressure Testing
Testing Pressure: 150 psi or 1.5 times the static pressure, whichever is greater.
Permitted Pressure Loss: 5 psi in one hour.
Revised July 15,1998
S27
Insert Tigard Water District Area MAP G
Revised July 15,1998
S28
H. SURVEYING
1. General
This document, Section 105 of the APWA specifications and ORS 209.140-150,
define the requirements for protection of existing survey monuments during any
construction and setting new survey monuments following construction.
2. Existing Survey Monuments
Any person or public agency that finds it necessary to interfere with or place over
any established public land survey corner or accessories for any reason shall notify
the County Surveyor prior to the interference. The County Surveyor shall reference
the monument prior to construction and replace it following construction. The
County Surveyor shall be reimbursed for all expenses from said replacement by the
party responsible for the construction.
In accordance with ORS 209.150, any person or public agency removing, disturbing
or destroying any survey monument of record in the office of the County Surveyor
shall cause a registered Professional Land Surveyor to file a reference with the
County Surveyor and replace the monument with 90 days of the removal,
disturbance, or destruction. Failure to comply with this provision is subject to
penalty according to ORS 209.990.
3. New Survey Monuments
Street Centerline Monumentation shall be in accordance with ORS 92.060
Subsection (2) and/or 209.15 Section 2. The centerlines of all street right-of-way
shall be monumented before the City shall accept a street improvement.
Monuments shall be set under the direction of a registered Professional Land
Surveyor. A record of survey must then be filed in compliance with ORS 209.250
and any additional requirements set forth by the City.
All centerline monuments shall be placed in a monument box conforming to City
standards and the top of the box shall be set at design finished grade. Monument
boxes shall be of a type approved by the City before installation. See City standard
drawings.
•
The following centerline monuments shall be set:
(a.) At centerline intersections created with existing streets, when the centerline
alignment of the existing street has been established by or for the City.
(b.) The centers of all cul-de-sacs.
(c.) Curve points in accordance with ORS 92.06 and 209.15. P.I.'s may be
monumented in lieu of P.C.'s and P.T.'s when the P.I. falls in the pavement.
All sanitary and storm sewers shall be placed in positions that do not interfere with
centerline monumentation.
Revised July 15,1998
S29
I. STRUCTURAL DESIGN
Structures not included in the Standard Drawings of this document shall be designed and
constructed in accordance with the requirements of the Structural Design Section of
ODOT. These Standards are referenced in ODOT's Bridge Design Manual and
Accompanying Standard Drawing, Standard Specifications for Highway Construction, and
Standard Drawings for Design and Construction.
The project special provisions shall specify the APWA or ODOT requirements for bridges
and other structures that apply to the specific project.
J. DESIGN MODIFICATIONS
1. General - Request to Modify Specifications/Standards
Modifications to specifications or standards may be requested as follows. It is to be
noted that if the requested modification involves public safety, the City will rule in the
direction of safety.
2. Modification Process
2.1 Submittal
Requests to modify shall be submitted in writing to the City Engineer. This
written request shall state the desired modification, the reason for the request
and a comparison between the specification/standard and the modification as
far as performance, and maintenance requirements.
Any modification or variance of these Standards should be documented and
reference nationally accepted specifications/standards. The use thereof shall
not compromise public safety or intent of the City's standards.
2.2 City's Review
The request to modify shall be reviewed by the City Engineer who shall make
one of the following decisions:
Approve as is, approve with changes, or deny with an explanation.
Approval of a request shall not constitute a precedent.
2.3 Appeal
Applicant may appeal the City Engineer's decision to the Council as provided in
the Community Development Code.
2.4 Criteria for Modification of Specification Standards
The City Engineer may grant a modification to the adopted specifications or
standards when any one of the following conditions are met:
(a) The specification or standard does not apply in the particular
application.
Revised July 15,1998
S30
(b) Topography, right-of-way or other geographic conditions impose an
economic hardship on the applicant and an equivalent alternative
that can accomplish the same design is available. Variances to self-
imposed hardships shall not be allowed. The variance requested
shall be the minimum variance that alleviates the hardship.
(c) A minor change to a specification or standard is required to address
a specific design or construction problem which, if not enacted, will
result in an undue hardship.
(d) An alternative design is proposed which will provide a plan equal or
superior to these standards. In considering the alternative, the City
Engineer shall consider appearance, durability, cost of maintenance,
public safety, and other appropriate factors.
K. CONSTRUCTION INSPECTION
1. General
All public construction shall be inspected by an Oregon registered engineer or a
qualified individual under his supervision as required in the Developer - Engineer
Agreement (Appendix. B).
An engineer whose firm, or any member of the firm, has a corporate, partnership or
any form of real property interest in the development for which the improvements
are required cannot be designated inspecting engineer. The inspecting engineer's
relationship to the project must be solely that of a professional service nature.
It shall be the policy of the City not to provide full inspection services for non-public
funded public improvements. However, the City may perform limited inspection
services upon request if the project scale is such that the retention of a private
inspecting engineer is not warranted. These inspection requirements are not
applicable to individual sidewalk, driveway or utility permits.
2. City Activities
Inspecting services provided by the City include:
• Liaison between the inspection engineer and the City
• Monitoring of work progress and performance testing as deemed desirable
• The performance of administrative and coordinate activities as required to
support the processing and completion of the project
• The issuance of stop work orders upon notifying the inspection engineer of
the City's intention to do so
• Primary inspection of public water lines
3. Inspecting Engineer's Activities
The following minimum activities are required of the designated inspecting
engineer:
a. *Execute a form accepting responsibility. (Appendix B)
Revised July 15,1998 S31
b. Maintain a project log book which contains at least the following
information:
(1) Job number and name of engineer and designees
(2) Date and time of site visits
(3) Weather conditions, including temperature
(4) A description of construction activities
(5) Statements of directions to change plans, specifications, stop work,
reject materials or other work quality actions
(6) Public agency contacts which result in plan changes or other
significant actions
(7) Perceived problems and action taken
(8) General remarks
(9) Final and staged inspections
(10) Record all material, soil and compaction tests
c. The inspecting engineer shall obtain and use a copy of City-approved
construction plans and specifications.
d. Review and approve all pipe, aggregate, concrete, AC and other materials
to ensure their compliance with City standards.
e. *Approve all plan or specification changes in writing and obtain City
approval.
f. Monitor and concur in construction activities to ensure end products meet
City specifications.
g. *Perform or have performed material, composition and other tests required
to ensure City specifications are met.
h. Periodically check that curb, storm sewer work and pavement grades are
in accordance with approved plans.
(1) For pavement construction, perform the following stage inspections
and record date of each:
(2) Curbs are built to line and grade
(3) Subgrade meets grade and compaction specifications
(4) Base rock meets grade and compaction specifications
(5) Leveling course meets grade and compaction specifications
(6) Wearing course meets grade and compaction specifications
i. For sewer construction, perform the following stage inspections and record
the date of each:
(1) Sewers are installed to proper line and grade
(2) Trenches are properly backfilled and compacted
(3) Construction staking is adequate to ensure that the sewer is
properly installed with respect to easement, right-of-way, and
property lines
(4) Air testing and video inspections are performed according to
standard procedures
Revised July 15.1998
S32
j. For grading, ensure that the grading plan, as staked, will result in
acceptable slopes along exterior property lines, proper on and offsite
drainage; and erosion control.
k. *Periodically certify to the City the amount of work completed to enable
release of moneys or a reduction of assurance amount.
I. File a completion report which contains:
(1) The original of the project completion certification
(2) A complete copy of the log book initialed by the inspecting
engineer
(3) A complete set of as-built mylar plans, including diskette in "DWG"
or"DXF"format if plans were prepared with the use of CAD
(4) The results of material tests, compaction tests and soil analysis as
detailed in the log book
m. Call to the City's attention within two working days all plan changes,
material changes, stop work orders or errors or omissions in the approved
plans or specifications.
n. Notify the City 24 hours before the start of construction or resumption of
work after shutdowns, except for normal resumption of work following
Sundays or holidays.
* The inspecting engineer of record must be registered to practice engineering in the State of
Oregon. The engineer must personally perform all activities marked by an (*) and must
supervise all individuals performing delegated activities. Material testing not performed by
the inspection engineer must be accomplished by a recognized testing firm or another
registered engineer.
Revised July 15,1998
S33
APPENDIX A - Maps Available
CITY OF TIGARD DEPARTMENT OF COMMUNITY DEVELOPMENT
Revised: May 1, 1991
VARIABLE SCALE PRICE SHEET SIZE
As-Built construction Drawings $2.00 24 X 36
Assessor's 'Tax' Maps (photocopy of a portion of map .25 8-1/2 X 11
Assessor's 'Tax' Maps (copy of full map) $2.25 18 X 24
Subdivision Plat Maps $2.00 18 X 24
SERIES 1" = 100' (quarter section map)
Orthophotographs (94 Sheets) $5.00 30 X 42
Topographic Maps (94 Sheets) $5.00 30 X 42
SERIES 1" = 200' (section maps)
Address/City Limits Maps (17 Sheets) $3.50 30 X 42
Annexation and Road Jurisdiction/ $3.50 30 X 42
Acceptance (17 Sheets) $3.50 30 X 42
Parcel Base (23 Sheets) $3.50 30 X 42
SERIES 1" = 400' (4 sheets)
City Limits $3.50 36 X 40
Parcel Base $3.50 36 X 40
Sanitary Sewer As-Built Index $3.50 36 X 40
Sanitary Sewer Mainline System $3.50 36 X 40
SERIES 1" = 800'
City Limits $4.00 36 X 48
Inventory: Buildable Lands -
(Commercial/Industrial Lands) $4.00 36 X 48
Land Use (Comprehensive Plan Map) $4.00 36 X 48
SERIES 1" = 800' (continued)
Voting Precincts $4.00 36 X 48
Wetlands and Floodplains (Comprehensive Plan Map; $4.00 36 X 48
Zoning Districts (Comprehensive Plan Map) $4.00 36 X 48
SERIES 1" = 1600'
Bike Path Plan No Cost 17 X 22
Street Index $4.00 24 X 36
Vertical Network Bench Mark Control $2.00 24 X 36
Transportation Plan (Comprehensive Plan Map) $2.00 24 X 36
Voting Precincts $2.00 24 X 36
Note: Maps are priced by page size or cost of acquiring from Washington County.
Revised July 15,1998 APPENDIX A
S34
APPENDIX B - Developer - Engineer Agreement
City Engineer
13125 SW Hall Blvd.
Tigard, OR 97223
RE:
Dear City Engineer:
We hereby certify that has been retained by
to perform or coordinate the following work pertinent to the above project.
1. Perform or coordinate the surveying or verify the existing surveying information as
necessary for the design.
2. If necessary, provide for the expertise of other engineers such as soils or structural
engineers.
3. Prepare construction drawings in accordance with the City standards and obtain the City,
and if applicable, DEQ, County, or State approval of such drawings.
4. Supply construction staking.
5. Provide adequate inspection to assure compliance with City Specifications, and keep
accurate field notes in order to prepare "as-built" drawings. The following minimum
activities are required of the designated inspecting engineer:
A. *Execute a form (this form) accepting responsibility.
B. Maintain a project logbook that contains at least the following information.
(1) Job number and name of engineer and designees;
(2) Date and time of site visits;
(3) Weather conditions, including temperature;
(4) A description of construction activities;
(5) Statements of directions to change plans, specifications, stop work, reject
materials or other work quality actions;
(6) Public agency contracts which result in plan changes or other significant
actions;
(7) Perceived problems and action taken;
(8) General remarks;
(9) Final and staged inspections;
(10) Record all material, soil, and compaction tests.
Revised July 15, 1998 APPENDIX B
S35
C. The inspection engineer shall obtain and use a copy of City-approved construction
plans and specifications.
D. Review and approve all pipe, aggregate, concrete, AC and other materials to
ensure their compliance with City standards.
E. *Approve all plan or specification changes in writing and obtain City approval.
F. Monitor and concur in construction activities to ensure end products meet City
specifications.
G. *Perform or have performed material, composition, and other tests required to
ensure City specifications are met.
H. Periodically check that curb, storm sewer work and pavement grades are in
accordance with approved plans.
I. For pavement construction, perform the following stage inspections and record
date of each:
(1) Curbs are built to line and grade;
(2) Subgrade meets grade and compaction specifications;
(3) Base rock meets grade and compaction specifications;
(4) Leveling course meets grade and compaction specifications;
(5) Wearing course meets grade and compaction specifications.
J. For sewer construction, perform the following stage inspections and record the
date of each:
(1) Sewers are installed to proper line and grade;
(2) Trenches are properly backfilled and compacted;
(3) Construction staking is adequate to ensure that the sewer is properly
installed with respect to easement, right-of-way, and property lines;
(4) Air testing and video inspections are performed according to standard
procedures.
K. For grading, ensure that the grading plan, as staked, will result in acceptable
slopes along exterior property lines, proper on and offsite drainage; and erosion
control.
L. Certify to the City the value of and amount of all work remaining to be completed
to enable release of moneys or a reduction of assurance amount.
M. File a completion report which contains:
(1) The original of the project completion certification;
(2) A complete copy of the log book initialed by the inspecting engineer;
(3) A complete set of as-built mylar plans, including a diskette in "DWG" or
"DXF" format if the plans were prepared with the use of CAD;
Revised July 15,1998 APPENDIX B
S36
(4) The results of material tests, compaction tests, and soil analysis as
detailed in the logbook.
N. Call to the City's attention within two working days all plan changes, material
changes, stop work order or errors or omissions in the approved plans or
specifications.
O. Notify the City 24 hours before the start of construction or resumption of work after
shutdowns, except for normal resumption of work following Sundays or holidays.
*The inspecting engineer of record must be registered to practice engineering in the State of
Oregon. The engineer must personally perform all activities marked by an (*) and must
supervise all individuals performing delegated activities. Material testing not performed by the
inspection engineer must be accomplished by a recognized testing firm or another registered
engineer.
6. Upon completion of construction, provide written certification that all improvements are
complete in accord with the approved plans and specifications.
7. Obtain City approval prior to any substantial deviation from the approved plans.
8. Resolve engineering and construction related problems as may arise.
We agree to notify the City immediately if the above agreement is terminated or if the engineer
for any reason is unable to perform the above duties.
By: By:
(Developer) (Engineer)
(Date) (Date)
H:\endoc\masters\doc11.mst
Revised July 15,1998 APPENDIX B
S37
APPENDIX C - Plan Submittal Check List
CITY OF TIGARD
A. GENERAL REQUIREMENTS
• Approved Application Completed
• Notice of Decision Conditions Met
• Soils Report/Subgrade Evaluation
• Hydraulic Report Calculations and Hydrology
• Erosion Control Plan
• Traffic Report
• Proof of Utility Coordination
• Quantities/Cost Estimate
• Design Plans
— Cover-Site, Vicinity, Abbreviation, Legend
— Street (Plan and Profile)
— Water, Storm and Sanitary (Plan and Profile), Water Quality Facilities
— Electricity, Phone, Gas crossings on storm and sanitary plans and profiles
— Grading
— Landscaping
— Structures
— Composite Utility Plan
— Details
— Traffic Control
— Signing and Striping
— General Notes
• Format
— 24"x 36" Sheet Size
— Scale
— North Arrow
— Bench Mark
— Title Block (Engineer., Owner, Project, Sheet)
— PE Stamp
— Revisions
— Dated
PLAN VIEW
• Ft/W, Property Lines Survey Monuments (Existing & Proposed)
• Easements (Slope, Utility, Access)
• Subdivision Name, Lot#, Tract Lines, Street Names
• Centerline with stationing (Existing & Proposed)
• Curb & Sidewalk (including. Ramps & Drawings & Elevations)
• Horizontal Curve Data (including curve radius, length and delta with elevations at %
deltas)
• Match Lines (with Reference Number Sheet)
• Survey (Existing & Proposed)
• Toe & Top of Slope
• Pedestrian/Bicycle Path
Revised July 15,1998 APPENDIX C
538
• Cross Section Locations
• Mailboxes
• Drainage Arrows
• Crown lines (except centerline)
• Intersection centerline stationing
• Existing Features (Adjusted, Removed, Relocated, Remain)
• Utilities (Existing & Proposed)
— W, SS, SD, G, T, E, TV
— Vaults & Conduit Type
— Streetlights, Junction Boxes
— Connections, meters, MH, CB, etc.
• Traffic Control
— Signing & Striping (Construction. & Permanent)
— Phased Construction Plan
— Signal Details
— Barricades
• Grading Plan
— Contours (Existing/proposed)
— Sedimentation Control
— Cross Sections
— Erosion Control (Structures & Planting)
— Trees & Shrubs (Existing &to be removed))
— Roof Drainage
— Building Pad and finish floor Elevations
C. PROFILE VIEW
• Street name (Utility Type)
• Station Grade and Elevation (PC, PT, PI, INTX, high point, low point, grade break)
• Vertical Curve Data (K, grade change, elevation., BVC, PIVC, EVClength)
• Ground at centerline and R/W (Existing & proposed)
• Extend Profile 300' (Street, Utility)
• Utility Profile (Storm, Water, and Sanitary) invert and rim elevation
• Utility Crossing, (SS, SD, W, G, E, T, TV)
• Curb Return Profile
• Grade breaks
• Backfill class, lengths
• Pipe class, lengths
• Scale (Horizontal & Vertical)
D. GENERAL NOTES
• Typical Specifications, Standard Details (City, County, State)
• Applicable utility standards
• Special site conditions
• Compaction requirements
• Erosion control methods, time limits
• Tree cutting allowed
• Construction methods (limits, time and physical)
Revised July 15,1998 APPENDIX C
S39
•
• Utility coordination
• Testing and inspection requirements (soil, pipe, waterline)
• Offsite roads clean and dust control
• Existing utility location verification
• Material specifications (e.g. concrete, pipe)
• Cut and fill requirements
• Benchmark
• Demolition
• Restoration of site
• Contractor securement of permits
E. CALCULATIONS
• Storm drainage
• Drainage basin contour map
• Offsite drainage
• Inlet capacity vs. actual flow
• Floodplain location
• Under drain requirements
• Traffic study/impact (ADT, Speed, Classification)
• Pavement section
• Quantity/Cost Estimate
F. TYPICAL DETAILS
• Typical road section, right-of-way to right-of-way, and slope to original ground,
including typical utility locations
• Utility details (W, SS, SD, E, G, T, TV)
• Manhole, catch basin, trench, inlet/outlet structures
• Fire hydrant, trench intersection
• Landscaping
• Sidewalk, Driveway, Curb
• Special details, structures
• Survey monument box
Revised July 15,1998 APPENDIX C
S40
•
APPENDIX D - General Conditions
RE:
✓ 1. The City's standard specification for traffic control is "Manual on Uniform Traffic
Control Devices For Streets and Highways", U.S. Dept. of Transportation, FHWA,
1988 Ed.
✓ 2. Traffic control shall be provided for by the contractor in accordance with the City's
standard specification and, also, in accordance with a City (job specific) approved
traffic control plan. A copy of the approved traffic control plan shall be available at
the work area.
✓ 3. Public roadway shall not be closed to traffic, at any time, without having first
obtained written approval from the City Engineer. The permit holder is responsible
for provision of timely notification of traffic flow disruptions to area wide Emergency
Services (Tigard Police Dept., Tualatin Fire & Rescue) and to Tri-Met and Tigard
and Beaverton School District.
✓ 4. Advance warning of imminent traffic disruption shall be provided to the general
motoring public by placement of an advance notification sign at each end of the
construction area 72 hours (min.) before initiation of construction work.
✓ 5. Access to existing properties shall be maintained at all times, including normal
delivery service and mail service and if not, shall be cause for work stoppage until
effective access is established.
✓ 6. Traffic control devices, flagpersons, etc., shall be in place prior to initiation of
construction work and shall be effectively maintained.
✓ 7. No work will be permitted during the hours of darkness, nor between 9:00 p.m. to
7:00 a.m., Monday through Friday nor between 9:00 p.m. to 8:00 a.m. Saturday, nor
between 9:00 p.m. to 9:00 a.m. Sunday.
✓ 8. Minimum travel lane width shall be twelve (121 feet; pedestrian travel shall also be
provided for.
✓ 9. The City reserves the right to add to or modify traffic control requirements as may
be necessary to effectively control traffic and to assure public safety.
✓ 10. Before initiating any construction activity, the permit holder shall contact the City's
private Development Review Engineer, (#639-4171) to establish a place, time, and
date for a pre-construction meeting.
✓ 11. The permit holder or his contractor shall notify the City's Inspector at 639-4171
twenty-four (24) hours prior to commencing work, twenty-four (24) hours prior to
any staged inspection (see attached listing) and after completing work covered by
the permit.
✓ 12. A copy of the permit and all attachments, and a copy of the approved construction
plan and all amendments shall be available at the work area. All work shall conform
to the permit terms, conditions and provisions and to the City approved permit
plans, and approved plan amendments and to the City's standards and
Revised July 15, 1998 APPENDIX D
S41
specifications and to these General Conditions. Changes to any of the aforesaid
must be approved by the City, in advance of work performance.
✓ 13. Maintenance of the work area and approach roads is the responsibility of the permit
holder. The work area and approach roads shall be maintained in a clean
condition, free from obstructions and hazards. A copy of the permit holders
Certificate of Insurance shall be available at the work area.
✓ 14. The spreading of mud or debris or storage of materials or equipment of any kind
upon any public roadway is strictly prohibited and violation shall be cause for
immediate cancellation of the permit. The City may at any time order immediate
clean up and stoppage of work to accomplish clean up.
✓ 15. Effective erosion control is required. Erosion control devices must be installed and
maintained meeting the D.E.Q. requirements. The City may at any time order
corrective action and stoppage of work to accomplish effective erosion control.
✓ 16. Property disturbed by construction activity shall be seeded with a standard grass
mix; shrubs, flowers, barkdust, existing signs, pavement markings, mailboxes, etc.
shall be reestablished, reinstalled or replaced, with like kind and material.
✓ 17. Effective drainage control is required. Drainage shall be controlled within the work
site and shall be so routed that adjacent private property, public property and the
receiving system is not adversely impacted. The City may at any time order
corrective action and stoppage of work to accomplish effective drainage control.
✓ 18. Excavator(s) must comply with O.R.S.757.541 through 757.571; excavator(s) shall
notify all utility companies for line locations 72 hours (min.) prior to start of work.
Damage to utilities shall be corrected at the permit holders'expense.
✓ 19. Contractor must verify all existing utilities for both vertical elevation and horizontal
location prior to start of work (pothole before digging if necessary). Should conflicts
arise and redesign or relocation of facilities be necessary, it shall be done at the
permit holders expense. Changes must be approved by the City in advance of work
performance. Contractor shall coordinate the work with affected utility agencies.
✓ 20. A temporary hard-surface patch (Cold mix AC or Hot Mix base paving) shall be
placed on trenches within roadways at the end of each days work. No trench, on
site or off-site, shall be left at any time in an unsafe condition. The permit holder is
responsible for and is liable for hazards or damage resulting from the prosecution of
the work.
✓- '21. Work provided for under the permit shall include repair of existing facilities (roads,
ditches, etc.) as may be necessary, in the City Inspectors opinion, to overcome
deterioration or damage which occurred in conjunction with the work authorized by
the permit. Corrective work shall be done at the permit holders' expense.
✓ 22. One as-built mylar drawing showing all new public improvements, including any
revision made to the previously approved construction plans and, also, any
improvement which may impact an existing public system or facility, shall be
provided to the City by a registered civil engineer along with an engineers
certification of installation compliance (form attached).
Revised July 15,1998 APPENDIX D
S42
✓ 23. A sewer system air-test and (V.H.S.) TV test report and one set of blueline "As-
Builts" (of either or both the storm and sanitary sewer systems) may be required by
the City for review and approval prior to connection of any buildings to the sewer
system.
✓ 24. The permit holders Engineer/Inspector shall submit daily inspection reports, on a
weekly basis, to the City's Inspector. (see Developer - Engineer Agreement Note #
5.)
✓ 25. The City's Inspectors may, at their discretion, require provision of tests and or
reports from the permit holder, permit holders engineer or contractor to validate
claims of material or construction adequacy/compliance. Such tests/reports shall be
provided at the permit holders'expense.
✓ 26. The permit holder shall provide a copy of a properly executed Release and Waiver
document to the City for each ownership disturbed by construction activity, as
evidence of disturbance resolution and owner satisfaction.
✓ 27. Existing monuments, property corners, and survey markers shall be protected.
Replacement shall be at the permit holders' expense.
✓ 28. The Engineer shall notify the Washington County Surveyor when the initial and final
lift of asphalt has been placed.
✓ 29. The permit holder shall provide to the City inspector, in writing, the names and 24
hour emergency telephone number of two (2) persons who have authority to resolve
problems, take corrective action and, in general, will be responsible in case of any
emergency. The permit holder shall notify the City Inspector, in writing, of any/all
assignment changes.
✓ 30. The permit holder shall cause his contractor to provide to the City Inspector, in
writing, the name and 24 hour emergency telephone number of a designated
"Competent Person" responsible for construction safety as per OR-OSHA, Chap.
437, Div. 3 Construction, Sub-division P - Excavations. The contractor shall notify
the City Inspector of any/all assignment changes.
✓ 31. It is the sole responsibility of the permit holder to provide for proper right-of-entry
and/or easements prior to starting work. Proof of right-of-entry or properly executed
easements, shall be provided to the City. The City shall in no way be construed to
be liable for the permit holders failure to obtain or provide for proof of right-of-entry
or easements.
✓- '32. Before placement of the final lift of asphalt, the permit holder shall clean and have
the City complete a pre-acceptance video inspection of all new sewer lines. The
permit holder shall provide the City with 30 days of notice for the video inspection.
Any deficiencies shall be repaired before placement of final lift.
(engdoc\masters\doc26.mst)
Revised July 15,1998 APPENDIX D
S43
APPENDIX E - Water Construction Notes
1. An estimated 12 percent of the water system cost must be on deposit prior to beginning
construction on water lines, and to receive a TPW (City of Tigard Public Works, Water
Division) stamped approval on construction plans.
2. The contractor shall maintain one set of TPW stamped approved plans on the
construction site at all times.
3. Curbs must be in place prior to installation of water mains within new subdivisions.
4. Notify TPW, Water Division, 48 hours prior to commencing construction to schedule a pre-
construction meeting. Telephone 639-4171.
5. All work shall be in accordance with AWWA (American Water Works Association)
standards.
6. AU work will be inspected and approved by TPW, Water Division.
7. All pipe and fittings shall be ductile iron, cement-lined, of new manufacture and made in
the USA. Pipe shall be "Tyton" Joint Ductile Iron, Class 52. All fittings shall be MJ
(mechanical joint) unless otherwise specified.
8. Cover for all water mains in street and rights-of-way shall be 36". Backfill shall be'/"-0"
gravel.
9. All valve-operating nuts shall be within 36" of finished grade, otherwise valve operating nut
extensions will be required.
10. Poured concrete thrust blocks of at least eight square feet of bearing surface are required
at each tee, cross, and bend locations (see details for minimum bearing areas).
11. A 4" x 4" x 8'-0", painted blue, shall be installed in front of every 2-inch water service
location, and remain there until the water meter is installed. All 2-inch water services shall
consist of a MJ x 2" IPT tee and 2" IPT x 110 compression fitting as manufactured by
Mueller Company.
12. Fir hydrant assembly consists of a MJ x 6" Flg. (Flange)tee, 6" Flg. x MJ gate valve, 6" MJ
x MJ holding spool, and a Modern Mueller Centurion fire hydrant, A-442, 6" MJ, 5-1/4"
MVO, 3-port (2-2'/2" NST hose connection, 1-4'/2" NST pumper), 11/2" pentagon operating
nut, opening left, color: yellow; Approved Equal: Mueller Centurion A-423, Waterious
Pacer 6790, Clow Medallion
13. Each fire hydrant shall be installed upon a pre-formed concrete block with 11/2 cubic yards
of crushed 2"—.3/," drain rock. Tarpaper will be laid on top of the drain rock to separate
the rock from earth cover.
14. All sanitary sewer lines within 10 feet laterally or 3 feet vertically of a water main shall be
encased in a reinforced concrete jacket 6" thick for a distance of 10 feet on both side of
the crossing. Where crossings are necessary, they must be made at approximately 90
degrees with at least 18" of separation below the water line.
15. All mains with a static pressure up to 100 psi (pounds per square inch) shall be tested at
150 psi for 1 hour with a maximum loss of 5 psi. Water mains with a static pressure
Revised July 15,1998 APPENDIX E
S44
greater than 100 psi shall be pressure tested at 1.5 times the static pressure for 1 hour
with a maximum loss of 5 psi.
16. Upon satisfactory completion of testing, the new mains and connections to existing mains
shall be cleaned and flushed with potable water prior to disinfection. Flushing velocities
shall be at least 2.5 feet per second. Disinfection shall be in accordance with AWWA
Standard C651-92, the State Health Division and City requirements. The continuous feed
method of disinfection shall be used. Disinfecting mixture shall be a chlorine-water
solution having a free chlorine residual of 40-50 mg/I (milligrams per liter). The
disinfection mixture will be prepared by injecting a calcium/sodium hypochlorite and water
solution into the pipeline at a measured rate while fresh (potable)water is allowed to flow
through the pipeline so that the chlorine-water solution is of the specified strength.
Treated (chlorinated)water shall be retained in the pipeline long enough to destroy all
nonspore-forming bacteria. Typical retention period is 24 hours. At the end of the 24-hour
period, the pipeline is to have a free chlorine residual of a least 10 mg/I. After satisfactory
chlorination, flush the water from the line until the water throughout the pipeline is equal
chemically and bacteriologically to the permanent source of supply.
Dispose of the disinfection water in an approved manner. Do not allow disinfection water
to flow into a waterway without adequate dilution or other satisfactory methods of reducing
chlorine residuals to a safe level as mandated by DEQ. After disposal and flushing of the
disinfection solution, there will be another 24-hour retention period prior to bacteriological
testing. Bacteriological tests will be taken by TPW.
17. Provide an Eclipse No. 88 Sampling Station manufactured by Kupferte Foundry, St. Louis,
MO 63102. The sampling station shall be 2'-0" bury, with a'/," FIPT(Female Iron Pipe
Thread) inlet, and a '/," unthreaded hose nozzle. All sampling stations shall be enclosed
in a lockable, non-removable, aluminum-cast housing. When opened, the sampling
station shall require no key for operation, and the water will flow in an all-brass waterway.
All working parts will be of brass and be removable from above ground with no digging. A
copper vent tube (standard)will enable the sampling station to be pumped free of
standing water to prevent freezing, and to minimize bacteria growth. The exterior piping
will be brass, and a %" ball valve shall be provided in place of the '/;' pet cock on the vent
pipe.
18. TPW will install all copper services and sampling stations prior to surfacing of streets.
Water meters will be installed by TPW upon individual request and payment by others
(owners). All water meters connected to an irrigation system must have the proper
Oregon State approved backflow prevention device , minimum of a DCVA(Double Check
Valve Assembly) installed on the property side of the water meter. In addition, every
meter for commercial, multi-family, industrial, and institutional service, regardless of size,
shall have the proper Oregon State approved backflow prevention device minimum of a
DCVA installed on the property side of the meter. The backflow prevention device shall
-be installed and tested by the owner,with the results forwarded to TPW Water Division,
before water services can begin.
19. Upon completion of installation of the water system, the contractor or owner shall advise
TPW of the total construction costs to which will be added 10% for TPW inspections,
water loss, overhead, administration, sampling, etc. and 2% for engineering review,
including "as-builts" drawings, updating master map, intersection maps, etc.
OPERATION OF VALVES IN THE TIGARD WATER SERVICE AREA IS PROHIBITED
Revised July 15,1998 APPENDIX E
S45
APPENDIX F - General Notes - Grading Plan Permits
1. This grading permit is not to be construed as final approval of site grading, embankment
or structural fill work; it merely provides for initiation of work and is subject to change
pending City approval of the entire construction-development plan set.
2. Spreading of mud or debris upon any public road is prohibited. The City may order
stoppage of work to effect corrective action, at any time.
3. Effective erosion control, dust control, and drainage control is required at all times. The
City may order stoppage of work to effect corrective action, at any time.
4. Embankments or structural fills for roadway construction or fills to be constructed on
buildable lots shall be constructed from excavated materials acceptable to the soils
engineer and shall be brought to grade in lifts not to exceed 8" loose measure. Each lift
shall be compacted to 90 percent of maximum density as obtained by AASTHO T-180
compaction test.
5. Structural fills shall comply with Appendix Chapter 33 of the Uniform Building Code.
Construction on existing slopes greater than 5:1 shall be achieved by benching into the
existing bank a minimum of ten feet. If the bench exposes sand soil an underdrain must
be provided. The underdrain, if required, will be constructed by installing nonwoven filter
fabric, equivalent to Exxon GTF 12500, along the bottom of the starting bench, then
placing a six inch layer of 11/21' — 3/4" drain rock, and finally covering the drain rock with
the nonwoven filter fabric. Successive benches will be constructed with vertical fill
between two to five feet and be compacted in layers not to exceed 8 inches. Each 8-inch
layer shall be compacted to a minimum of 90 percent AASHTO T-180 density. The fill
slopes shall not exceed 2:1 at finish grade. No rock or similar material exceeding a 12-
inch diameter shall be allowed in the structural fill.
6. The geotechnical engineer for structural fill shall be notified 24 hours in advance, by the
contractor, of starting benchwork to determine the need for an underdrain layer and to
verify existing conditions.
7. The City shall be provided with a copy of the geotechnical engineer's
report/recommendation changes.
8. If springs or ground water are encountered during construction, the contractor shall notify
the soils and civil engineers of the conditions found and coordinate his activities in a
manner that will allow the engineers time to review the situation and prepare a plan to
properly mitigate the water encountered.
9. The contractor shall have the soils engineer take compaction tests. A minimum of three
tests will be required for each 2 feet of fill.
10. Excavator must comply with ORS 757.541 through 757.571 (Utility pre-notification, etc.).
Revised July 15,1998 APPENDIX F
S46
APPENDIX G - Compaction Requirements
STRUCTURAL LOT FILL:
Minimum percent compaction required 90%
Test method required to determine maximum density T-180
Frequency of density testing in lots 8"lifts 3 test for each
2 feet offill
ROAD SECTION— EMBANKMENT:
Minimum percent compaction required 90% below 3'of subgrade
95%within 3'of subgrade
Test method required to determine maximum density T-99 or T-180
Frequency of density testing of embankment 8"lifts 3 tests for
each 2'of embankment
ROAD SECTION—SUBGRADE:
Minimum percent compaction required 95%
Percent compaction required to what dept below subgrade 1 foot
Test method required to determine maximum density AASHTO T-99
Frequency of density testing of subgrade As needed
ROAD SECTION —AGGREGATE BASE:
Minimum percent compaction required 95%
Test methods required to determine maximum density OSHD TM 106 or T-99
Frequency of density testing of aggregate base As needed
ROAD SECTION—ASPHALT PAVEMENT:
Minimum percent compaction required 92%
Test method required to determine maximum density OSHD TM 306
Frequency of density testing of aggregate base 5 tests minimum`
average density
Full time inspection or spot checking of compaction Spot
UTILITY TRENCH BACKFILL: (Beneath pavement or sidewalk)
Revised July 15,1998 APPENDIX G
S47
Minimum percent compaction required for bedding 90%
Minimum percent compaction required for pipe zone 90%
Minimum percent compaction required above pipe zone 95%
Test method required to determine maximum density T-99
Different Requirement for PVC No
In landscape area 85%
ADDITIONAL INFORMATION/COMMENTS:
*When using nuclear gauge,two readings at each site, the second at right angles to the first.
The two reading will be averaged to obtain test density.
Revised July 15,1998 APPENDIX G
S48
APPENDIX H - Public Improvement Drawing Circulation
List
PGE Company Northwest Natural Co.
14655 SW Old Scholls Ferry Rd. 220 NW Second Ave.
Beaverton, OR 97005 Portland, OR 97209
Attn.: Jim Johnston and Attn.: Scott Palmer
Brian Moore
General Telephone Co. Tualatin Valley Fire & Rescue
8840 SW Burnham - 2nd Floor Beaverton City Hall, 3rd Fl.
Tigard, OR 97223 4755 SW Griffith Dr.
Attn.: Sue Sartin Beaverton, OR 97005
Attn.: Mr. Gene Birchill
Tualatin Valley Water District
1850 SW 170th Ave. US West Communications
Aloha, OR 97006 421 SW Oak, Rm. #5-N-15
Attn.: Jesse Loman Portland, OR 97204
Attn.: Jackie Lollar
TCI Cable of Tualatin Valley State Highway Division
14200 SW Brigadoon CT 2131 SW Scholls Ferry Rd
Beaverton, OR 97005 Beaverton, OR 97005
Attn.: Craig Eyestone Attn.: Jane Estes
U.S. Post Office Washington County LUT
12210 SW Main Street Public Services Bldg.
Tigard, OR 97223 155 N. First Ave.
Attn.: Creiton Willis/Jim Stewart Hillsboro, OR 97124
Attn.: Ron Aase
State of Oregon USA Corps of Engineers
Division of State Lands Portland District
1600 State St. Permit Evaluation Section
Salem, OR 97310 319 SW Pine
Attn.: Bill Parks Portland, OR 97204
Attn.: Richard Johnson
Electric Lightwave, Inc.
8100 NE Parkway Drive# 200
Vancouver, WA 98662
Attn.: Susan McAdams
•
Revised July 15,1998 APPENDIX H
S49
APPENDIX I - Inspection Requirements
Public Improvement Project Work
City of Tigard
• General: Contact your assigned Public Improvement Inspector (Matt Harrell or Mike White
at 639-4171), a minimum of 24 hours before beginning any public improvement
construction work within the City limits. Also remember inspection is required before
'covering' or'pouring' anything.
• Required Inspections: At a minimum, inspection by the City inspector is required at the
start and end of each of the following work phases;
Grading Streets
Cut & Fill Staking HorizontalNertical. Staking
Fill Placement/Compaction Subgrade Cut/Fill
Temporary Drainage Work Curb Staking
Dust/Erosion Control Proof Roll Curb Line
Curb Forms/Pouring
Baserock Installation
Sanitary & Storm Sewers Leveling Course Installation
Base Compaction/Proof Roll
MH & CB Staking Wearing Course Installation
Pipe Installation/Backfill Wearing Course Compaction
Trench Compaction Testing Power Trenching/Utilities
Air& TV Testing Street Light Installation
Repairs/Resurfacing Monumentation
Traffic & Pedestrian Control Traffic & Pedestrian Control
Outfalls/Rip-Rap Sidewalk/Wheelchair Ramp
Installation
Overlay Installation **
Traffic Control
Water Line
Water line installation shall occur after curbs and temporary lot corners are
installed. Contact City Water Works Inspector for inspection.
WHEN IN DOUBT CALL FOR INSPECTION!
NOTE FOR SEWER ACCEPTANCE: The developer is required to have all sanitary and storm
lines within the scope of their project cleaned a minimum of one week prior to a request for a
pre-acceptance inspection (at end of one-year maintenance period). The ball and flushing or
jet rodding methods are considered acceptable. A 30-day minimum request for pre-
acceptance TV inspection is required prior to scheduling placement of the asphalt overlay.
Any problems noted in these inspections are subject to repair prior to the placement of the
overlay.
Revised July 15,1998 APPENDIX I
S50
APPENDIX J - Subdivision Compliance Agreement
THIS AGREEMENT dated the day of , 19 between the
CITY OF TIGARD, a municipality of the State of Oregon, hereinafter termed the "CITY",
hereinafter termed "Petitioner",
WITNESSETH :
WHEREAS, Petitioner has applied to the City for approval for filing in Washington
County, a subdivision plat known as Willamette Meridian,
Washington County, Oregon; and
WHEREAS, the City has adopted the Standard Specifications for Public Works
Construction by Oregon Chapter APWA, for street, structure and re ated work, and Unified
Sewerage Agency Standards and Specifications, for sanitary and storm se . -r co'struction,
prepared by professional engineers, for subdivision public improvement imp o,,._:,ent; and
WHEREAS, public improvements ublic im rovements to be construct-. • Petiticn:r's aev- ••ment are
incomplete, and Petitioner has nonetheless requeste• . City o permi prugr- s' e use of
property in the subdivision, and the parties • - ire her- • to protect the pu. is interest
generally and prospective purchasers • • s in s.id . ••ivi.is n t y .,•- , enforceable
assurances that public improveme : ill be '•stal -• as -•uir.d_anc completed within the
time hereinafter set forth.
NoW HE:EF•R• in •• .id:ra ion •f he •r-go ng premises and the covenants and
agreem:nts to •e k:, o•: p:rf•rm:d .y h: 'etiti.ne and its sureties, IT IS HEREBY
AGREED AS FOL•S W .. (1) Ps. iti.1-- shall pro. - -d with development, with the intent
and pur•ose to co • et a pu•li ' provements except sidewalks and street trees of said
subdivisio • ate, 1 an years from the date of this agreement, and Petitioner agrees
to corn. , it all u,•' ' ion standards as set forth in the Tigard Municipal Code and the
standa • specific, ions of the City of Tigard, to comply with all terms and provisions specified
therein .is •rovement by the Council and Planning Commission of the City of Tigard,
Oregon, or as may be specified by the Engineering Department and to use only such material
and to follow such designs as may be required by or approved by said Department. Petitioner
shall provide certification of installation conformance and one as-built mylar, both stamped by
a registered civil engineer, to the City prior to City inspection of petitioners' improvement work
for City conditional and final acceptance consideration. Petitioner's contractor shall be
licensed, bonded, and insured.
(2) (OPTIONAL) To assure compliance with the City's requirements and the
provisions herein, Petitioner tenders to the City a surety bond in form approved by the City,
with liability in the amount of$ a copy of which is attached and by this reference
made a part hereof.
(2) (OPTIONAL) If the petitioner desires to proceed to record the development plat
prior to completion of installation of all required public improvements, Petitioner agrees to
tender to the City a surety bond in form approved by the City in the amount of $
(or in an amount equal to the value of all incomplete public improvement work plus the one
year guarantee amount). THE PLAT SHALL NOT BE RECORDED UNTIL ALL PUBLIC
IMPROVEMENTS ARE COMPLETE OR ARE ASSURED.
Revised July 15,1998 APPENDIX J
S51
(3) In the event that Petitioner shall fail, neglect or refuse to proceed with the work
in an orderly and progressive manner to assure completion within the time limits, upon ten (10)
days notice by the City to Petitioner and Petitioner's sureties, and such default and failure to
proceed continuing thereafter, the City may at its option proceed to have the work completed
and charge the costs hereof against Petitioner and Petitioner's Sureties and in the event same
be not paid, to bring an action on the said bond to recover the amount thereof. In the event
such action be brought, Petitioner and Petitioner's Sureties promise and agree to pay, in
addition to the amounts accruing and allowable, such sum as the court shall adjudge
reasonable as attorney's fees and costs incurred by the City, both in the Trial Court and
Appellate Court, if any, or the City may, at its option, bring proceedings to enforce against the
Petitioner and/or Petitioner's Sureties specific performance of the contract and compliance with
the subdivision standards and ordinances of the City of Tigard, and in such event, in like
manner, the City shall be entitled to recover such sum as the court shall adjudge reasonable
as and for the City attorney's fees and costs, both in the Trial Court and Appellate Court, if
any.
(4) Petitioner, concurrent with the execution hereof, shall dept with • - .ity an
amount estimated to equal pole and luminary maintenance fees, for street Ii• in faclities
within the subdivision, according to Portland General Electric Schedule #• , ion "B",
together with a further sum equal to the estimated cost of p s 'ding el s ric e - •y to
energize the street lighting facilities for a period of two ears from th- d. e . nitial
energizing of said lights. Said amount being $ _
(5) The City agrees to make a • •roviie •eri id c a • ;nal inspections which in the
City's interest are desirable to assur: c•m•lia e he e ith, c%ns ration whereof the
Petitioner shall . pr--cribe• ' pe ti•n fe•s *
*- ol- e:
- - ee 111.1
(6) - City .gre l o ' s all street identification and traffic signs within said
subdivision, i :•ns'•er.ti•n of .ayment in the amount of$
(7) At s time as all public improvements except sidewalks, street trees and
asphalt overlay • local streets within the subdivision have been completed in accordance with
the City's requirements, Petitioner shall submit a "certificate of installation conformance" to the
City to notify the City of readiness for conditional acceptance inspection and, then, upon
notification by the Engineering Department, that the requirements of the City have been met,
the Petitioner will submit to the City a good and sufficient guarantee bond, if not already
provided with the performance bond, form approved by the City to provide for correction of any
incomplete work or any defective work or maintenance becoming apparent or arising within
one (1) year after conditional acceptance of the public improvements by the City.
(8) Upon receipt of certification from the Engineering Department that all
requirements have been met, and a One Year Guarantee Bond, the City agrees to
conditionally accept the public improvement subject to the requirement of completion of all
work and correction of deficiencies and maintenance for a period of one year as set forth
above.
(9) That in addition to or supplementary of the requirements of Tigard Municipal
Code and the provisions hereof, Petitioner binds itself to conform to the following
requirements, scheduling limitations:
Revised July 15,1998 APPENDIX J
S52
(a) No building permits, or permits to connect to City utility services shall be
issued for lots within Petitioner's subdivision as described until: 1) the City Engineer has
determined that the corresponding public improvements are substantially complete to assure
that the health and safety of the citizens will not be endangered from inadequate public
facilities, and 2) Petitioner has provided to the City Engineer one check print of the as-built
drawings, prepared by a registered civil engineer, for review and approval, along with
certification of substantial completion, signed and stamped by Petitioner's engineer.
(b) Upon a determination by the City Engineer that the public improvements
are substantially complete and a check print of the as-built drawings has been reviewed and
approved, the Petitioner or individual lot owners within the subdivision may receive building
permits or utility service for not more than 50-percent of the platted lots within the subdivision.
(c) No building permits shall be issued or utility service approved for any lot
which, together with previously approved lots, would exceed 50-pJ.eent of the platted lots
within the subdivision until: 1) all required public improvements have be- co "pleted in
accordance with the approved plans, except for those improvements lisbed • S tion 7 above,
2) Petitioner has provided one as-built mylar stamped by a registerec c' it t ne:r, 3) the
Petitioner has submitted a "certificate of installation confor an e" as describe. • ection 7
above, 4) a One Year Guarantee Bond, as described ' ction a bove, ha• b:-n submitted
by Petitioner, and 5) the remaining, incomplet ° rovem t lis ed in S:ction 7 .re assured
by a performance assurance.
d.) None • the lot-of be itioner's subdi ision as described may be
occupied f resid ntial rpos: until ar Occupancy Pe is issued under authority of the
City an n O p cy -er• sh:II be issued prior tc cDnd Tonal acceptance of the subdivision
and tote t me hat ti• -wal rarallel'ng the�eet for each developed lot proposed to be
occupie , is install d a: a rt • tie cevettpment; pr • ed that all sidewalks as required by
the plan and Tigard u i pal c,- shall be installed throughout said subdivision not later
than three ) y.ars f om the •: e of this Subdivision Compliance Agreement.
(e All landscaping trees on that portion of each lot between the public
sidewal . .: the curb (parking area), if required, shall be planted in place prior to final
inspection and issuance of Occupancy Permit for each such lot in the subdivision. Provided
that final inspection and application for Occupancy Permit occurs within any calendar month
from October to April of any year, such plantings may be deferred until the next following
growing season. In any event, all required landscaping and trees in all areas shall be planted
and in place within the entire subdivision within three (3) years from the date of this subdivision
improvement contract.
(f) After conditional City acceptance of the public improvements, the
Petitioner agrees to place an asphalt concrete overlay on all streets within the development;
placement scheduling to be approved by the City.
(g) Compliance with all terms and provisions specified for said subdivision
development by the Council and the Planning Commission of the City of Tigard, Oregon, in
regard to variances allowed from the Tigard Municipal Code, conditions specified by the zone
use classification and, also on the approved plat(s) and plan(s).
(h) Petitioner agrees to correct any defective work and to perform any
maintenance, upon notification by the City, arising during the guarantee period as set forth
above.
Revised July 15,1998 APPENDIX J
S53
(10) At such time as all public improvements have been completed in accordance
with the City's requirements, Petitioner shall notify the City of readiness for final inspection and
upon certification by the Engineering Department that all requirements of the City have been
met, the City agrees to accept said improvements for operation and maintenance
responsibility, and release the Petitioner's Guarantee Bond.
(11) (OPTIONAL) The parties hereby adopt the form of performance bond, copy is
attached and by reference made a part hereof, and Petitioner agrees to cause to have said
bond executed and filed with the City concurrently with the execution of this agreement at or
prior to the time this agreement is executed on behalf of the City. Petitioner further agrees to
maintain said bond in full force and effect until otherwise authorized b e City in writing.
(11) (OPTIONAL) Petitioner agrees to cause to have said b. • :xe• ted-end 'lied with
the City concurrently with the execution of this agreement or as m: •th: rw' a •escribed
herein. Petitioner further agrees to maintain said bond in f. o c- - ti ,ffect - otherwise
authorized by the City in writing. Qach(12) The specific requirement � h re.f - . I f. . purposes be
included as a part of the obligation red bathe p=rfor ce b. • entioned above, and
the City shall b- entitled to - ourse in/the the It o' 41-fault on he part of the Petitioner with
respect to - y req 'rem: ther-of. I
I I 1 SS ■ 'rte"EI F, Pgtitiane- a,�g by and through its duly authorized
undersi�lned office . p u to resolution-Q(its Board : lirectors has caused this agreement
to be e -cuted, an. t,e it acts cpiTsuant to resolution of its Council adopted at a regularly
schedule. me- ing ., the c day of October, 19 86 , has caused this agreement to be
execut-: • t - Ci ' •.' eer.
PETITIONER:
By:
(Title)
THE CITY OF TIGARD
By:
City Engineer
(Attached Notary Acknowledgment hereto)
Return signed copy to:
Revised April,1997
c\my documentsldesgn standards.doc
Revised July 15,1998 APPENDIX J
S54
APPENDIX K - Subdivision Public Improvements -
Performance Bond
Bond No.
KNOW ALL MEN BY THESE PRESENCE, that we as
Principal, and - - —��---- — —___—_, a corporation duly
authorized to conduct a general surety business in the State of Oregon, as Surety, are jointly
and severally held bound unto the City of Tigard, Oregon, a municipality of the State of
Oregon, hereinafter called obligee, in the sum of$ , lawful money of the United
States of America, for the payment of which we, as Principal, and as Surety, jointly and
severally bind ourselves, our successors and assigns firmly by these present.
THE CONDITIONS OF THIS BOND AND OBLIGATION IS ' , tha - •rincipals
are , located in t - ty o i•-rd, ,I regon,
and have entered into a Compliance Agreement with respect to :ly •e ••m:nt and
improvement, a copy of said Agreement is attached, and by re c: - •= a 'art • - eof; and
NOW, THEREFORE, if the Principal herei aII °aith • a d •'se - - 'd comply
with all terms of the Agreement and sh II a d trul •:rfo - m: - : and things
undertaken to be performed under s . gree - t a-id un• - all r• . ices, regulations and
conditions of the Obligee applicable :o s '• de :14 pmen:an• imp v- ent, and shall promptly
make payme• to - I per s su pl,iing a•or •r aterial f of the work provided by said
agreemen an• sha no pe it a y lien or clai o be fled r prosecuted against the Obligee,
then this bli•atib sha •- •id, •tharw e to r•m-' in'ull rce and effect.
In he event o it r cti• ed by the Obligee hereunder to enforce said contract
or to recoverun r t terms • s bond, in addition to all other rights and remedies, the City,
in the ev s all r- hall be entitled to recover such sums as the Court may adjudge
reasona le as an or attorney's fees.
IN WITNESS WHEREOF, the parties hereto have caused this bond to be executed this
day of , 19
Principal
By:
(A true copy of the Power of Attorney
must be attached to the original of this bond).
Surety
Attorney in Fact
Address
,,EN DRN-DEVIDOC28.DOT
Revised July 15,1998 APPENDIX K
S55
APPENDIX L - Project Completion Requirements For
Maintenance Status
PROJECT
The following items shall be complete prior to placing a project onto the one-year maintenance period,
and prior to issuance of 50%of the building permits:
1. Sanitary sewer installed,air, mandrill, and TV inspections complete and approved.
2. Storm sewer installed, mandrill and TV inspections complete and approved.
_ 3. Water mains installed,tests complete and passed, and services installed.
4. Curbs installed with 2 weep holes per lot.
_5. Streets complete through first lift of asphalt.
6. Site grading and compaction complete per plan.
7. Power trench and franchise utility installation complete (power, gas, telephone, cable
TV), backfilled and compacted.
8. Bike paths and maintenance access roads installed per plan.
9. General clean up, post construction erosion control installed as necessary.
10. Sidewalks,wheel chair ramps, and mailbox bubble outs installed per plan.
11. Streetlights installed per plan and ready to be energized..
12. All easements and dedications recorded, including plat at Washington County.
13. Check print of as-builts submitted for review and approval.
14. Water quality/detention facility installed and complete per plan.
15. Final report from Geotechnical Engineer submitted for review and approval, in
accordance with UBC Appendix Chapter 33.
16. A completion report from the private Engineer, including a Certificate of Compliance
(City form), in accordance with the Developer-Engineer Agreement.
Prior to placing the project onto the one-year maintenance period and release of the remaining 50% of
building permits:
17. Mailboxes installed per plan.
18. Street signs and barricades installed per plan.
19. Mylar as-builts submitted.
20. Maintenance bond submitted (City form).
\brlanr\masters\prolcom p.doc
Revised July 15,1998 APPENDIX L
S56
APPENDIX M - Abbreviations
A Demo Demolish GB Grade Break
AB Aggregate Base Det Detail GP Guar Post
AC Asphalt Concrete DI Ditch Inlet H
ACB Asphalt Concrete Base Dia Diameter H Height
Approx Approximate DIP Ductile Iron Pipe HDPE High Density Polyethylene
AS Aggregate Subbase DR Drive Horiz Horizontal
@ At Dwg Drawing H x W Height x Width
Ave Avenue Dw Driveway Hwy Highway
B E I
BC Beginning of Horizontal Curve
BCR Begin E East ID Inside Diameter
Bldg Building Ea Each IE Invert Elevation
Blvd Boulevard Ease Easement Inch
BM Bench Mark EC End Horizontal Curve Inst Install
BVC Begin Vertical Curve ECR End Curb Return lrrig Irrigation
Elec Electric
C Elev Elevation
CAP Corrugated Aluminum Pipe EP Edge of Pavement j Exc Excavate Jt Joint
CB Catch Basin Exi st Existing
CDF Controlled Density Fill
CE Construction Easement Esp Jt Expansion Joint/
CF Cubic Fee L
CIP Cast Iron Pipe L Length
CL Centerline F LB Pound
CO Cleanout FC Face of Curb LF Linear Foot
Conc Concrete FG Finish Grade Ln Lane
Const Construct FH Fire Hydrant Loc Location
CTB Concrete Treated Base FL Flow Line LS Lump Sum
Cult' Culvert ft. Feet or Foot Lt Left
cy Cubic Yard
G
D Galv Galvanized
Revised July 15,1998 APPENDIX M
S57
M R W West
Max Maximum R Radius WV Water Valve
MH Manhole RBO Remove by Others
Med Median RCP Reinforced Concrete Pipe X
Min Minimum Rd Road X-ing Crossing
Mon Monument Rel Relocate X-Sec Cross Section
Req'd Required
Rev Revise or Revised
N RR Railroad
N North Rt Right
NIC Not In Contract RW Retaining Wall
NO Number R/W Right of Way
NTS Not To Scale
S
O s South
OC On Center Sec Section
OD Outside Diameter SD Storm Drain
OG Original Ground Sht Sheet
Specs Specifications
SS Sanitary Sewer
P Sta Station
PC Portland Cement Std Standard
St Street
PCC Portland Cement Concrete SW Sidewalk
PCF Pounds Per Cubic Foot
PI Point of Intersection
PL Property Line T
POC Point on Curve
PP Power Pole TC Top of Curb
PRC Point of Reverse Curve Temp Temporary
PRV Pressure Reducing Valve TG Top of Grate
PRVC Point of Reverse Vertical TOP Top of Pipe
Curve Type Typical
PSF Pounds per Square Foot
PSI Pounds per Square Inch
.PT Point of Tagency V
PVC Polyvinylchloride VC Vertical Curve
PVI Point of Vertical Intersection Vert Vertical
Pvmt Pavement w
Revised July 15,1998 APPENDIX M
S58
APPENDIX N - Standard Details
Street
❑ 120 Concrete Sidewalk July 15, 1998
❑ 125 Standard Curb July 15, 1998
El 126 Curb and Gutter July 15, 1998
❑ 128 Corner Wheelchair Ramp w/Curbside Sidewalk March 10, 2003
El 140 Driveway Approach Location July 15, 1998
El 142 Standard Driveway March 10, 2003
❑ 143 Modified Driveway March 10, 2003
El 145 Curb Knockout for Driveways July 15, 1998
El 148 Driveway Culvert Streets w/o Curbs July 15, 1998
El 162 Alternate Commercial Driveway July 15, 1998
El 165 Fire Truck Turnaround July 15, 1998
❑ 166 Maintenance Access or Pedestrian/Bike Path July 15, 1998
❑ 170 Monument Box July 15, 1998
❑ 172 Mailbox Alternative July 15, 1998
El 180 Trench Backfill July 15, 1998
El 182 Pavement Dig-Out and Repair July 15, 1998
El 190 Typical Traffic Control Plan July 15, 1998
El 192 Street Barricade July 15, 1998
Water
El 503 Typical Gate Valve July 15, 1998
El 504 Typical Butterfly Valve July 15, 1998
El 505 Operating Nut Extension July 15, 1998
El 520 3/4"-1"Water Service December 17, 2004
El 521 2" & 1 1/2" Water Service July 15, 1998
El 523 3" &4" Meter July 15, 1998
El 525 Large Meter w/Fire Bypass July 15, 1998
El 530 Double Check Assembly July 15, 1998
El 531 Irrigation Double Check Assembly July 15, 1998
El 532 Double Check Valve Assembly July 15, 1998
❑ 533 Double Check Detector Valve Assembly July 15, 1998
El 542 Fire Hydrant Assembly July 15, 1998
El 550 RP Detector Backflow Assembly 2 1/2"- 10" (Below Ground) July 15, 1998
El 553 RP Backflow Assembly 2 112"+ (Above Ground) July 15, 1998
❑ 554 Reduced Pressure Detector Backflow(Above Ground) July 15, 1998
❑ 555 Reduced Pressure Backflow Assembly July 15, 1998
❑ 557 Reduced Pressure Backflow Assembly Discharge Rates July 15, 1998
El 558 Pressure Reducing Station July 15, 1998
El 560 Standard Thrust Block July 15, 1998
El 561 Straddle Block July 15, 1998
El '563 Vertical Bend Restraint July 15, 1998
El 570 2" Standard Blowoff July 15, 1998
El 571 6" Blowoff July 15, 1998
❑ 572 Sampling station July 15, 1998
El 573 Minimum Protection For Filling Tanker Trucks July 15, 1998
❑ 575 Typical Valve And Hydrant Location July 15, 1998
❑ 580 Pipe Casing December 17, 2004
El 590 1" Combination Air& Vacuum Valve July 15, 1998
El 591 2" Combination Air& Vacuum Valve July 15, 1998
A
Revised December 17,2004 .APPENDIX N
S59
LAWYERS
Davis Wright Tremaine LLP
ANCHORAGE BELLEVUE LOS ANGELES NEW YORK PORTLAND SAN FRANCISCO SEATTLE SHANGHAI WASHINGTON, D.C.
CHRISTOPHER P. KOBACK SUITE 2300 TEL (503) 241-2300
Direct (503) 775-5382 1300 SW FIFTH AVENUE PAX (503) 778-5299
cbsiskoback @d.t.com PORTLAND, OR. 97201-5682 www.dwt.com
November 15,2004
Morgan Tracey
City of Tigard
13125 S.W. Hall Blvd.
Tigard, OR 97223
Re: 2129 Ash Creek Estates PUD
Justification For Items Identified in LUBA Remand
Dear Mr. Tracey:
In a decision dated August 20, 2004, the Land Use Board of Appeals ("LUBA"),
remanded the City's decision approving Windwood Construction's application for a planned unit
development named Ash Creek Estates. LUBA's decision specified three instances where it
found the City's findings insufficient. In this letter, Windwood Construction is providing the
City with additional information and evidence related to those findings.
FINDINGS RELATED TO VERTICAL SAG CURVE
(TCDC 18.810.020(B))
S.W. 74's' Avenue along the western border of the property is currently
unimproved. The City is requiring that Windwood make certain improvements to S.W. 74 th as
part of its approval. Windwood does not object to the City's requirement. However, due to the
topography and the existence of a stream, the improvements to S.W. 74th will result in a fairly
steep sag.curve and a corresponding crest curve. There are standards that define how steep sag
and crest curves can be at various speeds. The steepness of the curves is expressed as a "K"
value. For example, at a speed of 25 mph, the typical standards require a vertical sag "K" value
of 13.4. In this case, the speed limit on S.W. 74th is 25mph. To achieve a "K" value of 13.4,
Windwood would have to place a significant amount of fill in S.W. 74th to make the sag curve
more shallow and the crest curve lower.
During the hearing process, Windwood provided evidence that significant fill
would cause negative impacts to the resources adjacent to S.W. 74th and would create the
possibility of damaging a water main under the street. Specifically, prior to Windwood's
application, the City of Tualatin constructed a 36" supply line under the creek within the S.W.
S60
Morgan Tracey
City of Tigard
'�_ f: November 15, 2004
Page 2
74th Avenue right-of-way. In order for this line to be maintainable,the amount of earth over the
line must be minimized. A 25 mile per hour design would create fills greater than 35 feet deep.
This would make failures of the line extremely difficult to reach and repair, and also make a
large failure have catastrophic results.
Also the fills would result in impacts to the creek,which would include removing
a meander in the creek that would result in too much impact to the environment and the removal
of more large trees in the sensitive area.
Windwood's consultants considered using a bridge as opposed to fill. The
consultants' conclusion was that a bridge would result in an unmaintainable water line that could
not be repaired or maintained under the bridge deck and would be much too expensive to
construct and maintain.
Relocating the waterline is not a viable option either since it would create too
much interruption in service to the City of Tualatin and would increase the difficulty of
maintaining the line by placing it in the waterway
As Windwood previously presented, allowing for a lower speed limit is the only
reasonable solution to the waterline construction and maintenance issue. At 15 mph, Windwood
could make the required improvements using only 21.63 ft. of fill. While that means that any
repair will still require some excavation, it is much less than what is required if the sag curve is
designed at 25 mph.
Accordingly, Windwood proposed to lower the speed limit in the area of the sag
curve to 15 mph. At that speed the sag curve "K" factor is 5. Windwood could improve
S.W.74th to meet that standard without significant fill. The City agreed with Windwood's
proposal and, in the final findings, stated as follows:
. The applicant also requested that the speed limit be reduced to 15
mph in the section where the S.W. 74th Avenue crossing will
occur. This speed limit was accepted by the City of Tigard
Engineer. The city of Tigard standards are met by a 15 mph
vertical curve design to a"K"value of greater than 5 (ASSHTO).
LUBA declared the City's finding to be lacking, concluding: "The findings
simply say the City engineer has accepted the proposal. Neither the city's findings nor the
response brief identify any place in the record that explains the city engineer's reasoning in
support of the lower "K" value or the city engineer's authority to approve deviations from the
adopted"K" values. Without explanation,we must sustain this subassignment of error."
S61
PDX 1191299x144727-22
Morgan Tracey •
City of Tigard
November 15, 2004
Page 3
Windwood believes that there is an adequate explanation for the city engineer's
authority and ample reasons for exercising that authority to deviate from the basic standards in
the City's code.
Section B (City of Tigard Standard Specifications) reads: "The City Engineer
shall establish standard specifications consistent with the application of engineering principles."
The City's Public Improvement standards are based on ASSHTO standards and standards of
Washington County. The preface to the City's design standards states: "The form has been kept
brief and no attempt has been made to cover all possible situations or to provide detailed
explanations." In relation to sag curves and crest curves, the Washington County standards, as
set forth in tables, include speeds of less than 25 mph and speeds as low as 15 mph. Because the
City's published tables are not intended to be comprehensive and because they are based on
Washington County standards, Windwood believes that the city engineer has the authority to
approve a design based on a 15 mph speed consistent with Washington County standards. The
Washington County table confirms that Windwood's proposed design meets ASSHTO standards
since Washington County designs to ASSHTO.
In fact, Windwood's proposed design exceeds Washington County's standards.
Washington County's standard for both sag and crest curves require a "K" value of 5.0 at 15
mph, but is based upon the absence of street lights. Windwood's proposed design will result in a
"K" value of 5.3 and also incorporates street lights.
In order to clarify the authority to "set" speed limits, Windwood's consultants
contacted the State of Oregon. The speed limit is set by the State as 25 miles per hour as the
normal speed limit on all residential streets. Where specific sections of streets cannot meet this
standard, cities have authorization to provide design exceptions that allow for sections of streets
that they are in ownership of to be constructed, reconstructed, or repaired that don't meet the
speed limit standards. The State administers design exceptions on its own highways as well.
According to the State, design exceptions at the state level are mitigated by using advisory signs
as well as other safety measures. Jurisdictions are, therefore, allowed to post special signs and
take other measures to safely control traffic.
Below are options that Windwood proposes:
Option 1:
A. Install "Bump" sign with 15 mph advisory sign below it.
B. Install "DIP"sign with 15 mph advisory sign below it.
(Place sign in advance of crest or sag to allow safe reaction and deceleration
time.)
S62
PDX 1191299v1 44727-22
Morgan Tracey m
City of Tigard
f November 15,2004
Page 4
Option 2: Three Way Stop Intersection
A. Install a"3-Way Stop" at the intersection of the new public road access to
S.W. 74th Avenue.
B. Install"DIP"sign with 15 mph advisory sign below it.
(Place sign in advance of crest or sag to allow safe reaction and deceleration
time.)
Although Option 2 would result in a stop sign on S.W. 74th, which is a through
street, this would remove the need to sign the street for 15 miles per hour at the crest since the
stop sign will slow traffic to an approach speed of 15 mph at the critical location. Although this
would not meet warrants for a "need" by ASSHTO standards, this would be a very effective
"legal" mitigation for the crest not meeting speed design standards. These measures would
qualify as a mitigation for the sag and crest.
FINDINGS RELATED TO TREE PLAN
(TCDC 18.390.030)
In its decision, City Council interpreted its code to require a tree plan only in
situations where the applicant was required to obtain a tree cutting permit to remove trees. The
City reasoned that because Windwood did not require a tree cutting permit for the majority of its
site, a tree plan for the entire site was not required. Windwood did submit a tree plan related to
its removal of trees in the environmentally sensitive area of the site because a permit was
required to remove trees.
LUBA rejected the City's interpretation. Accordingly, Windwood understands
that it is now required to submit a tree plan encompassing the.entire site and which includes all
• of the information required in TCDC 18.390.030. The proposed attached tree plan and arborist's
report establishes the trees to be saved and those to be cut. As reflected in that plan, the total
number of trees that will be retained is greater than 50%; thus, 50% mitigation is required. This
will be accomplished by planting trees on-site or off-site. An in-lieu-of fee will be paid for any
trees not planted by site development permit issuance and shall be bonded for until they are
planted or the fee paid. Additional trees may be saved during the construction of houses. If trees
are saved within the bond period, we would request that the in-lieu-of fee be reduced.
A separate permit.will be submitted for tree cutting within the sensitive area
pursuant to TCDC 18.790.050.
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City of Tigard �1!
November 15, 2004
Page 5
ti
FINDINGS RELATED TO ADJUSTMENTS
Windwood requested three special adjustments to street improvement and
sidewalk construction standards. One adjustment allowed curb tight sidewalks on a small
segment of S.W. 74th Avenue. Two of the adjustments allowed a cul-de-sac to exceed 200 feet
in length and to serve 23 houses.
The City Council addressed Windwood's requested adjustment request under
TCDC 18.370.020(C)(1), which is a general adjustment standard and not under TCDC
18.370.020(C)(11), which is specific to street improvements. Windwood acknowledges that in
its application material it too addressed the requested adjustments under the general standard as
opposed to the specific standard. In its decision, LUBA concluded that the City's findings
related to the requested adjustments was insufficient in a couple of areas. LUBA also noted the
difference between the two criteria and suggested that the City could consider the requested
adjustments under the standards applicable to street improvements.
Consistent with LUBA's decision, Windwood will discuss its requested
adjustments under both standards and, to the extent required, provide additional evidence and
information under the general adjustment standards.
1. Adjustments to Streets and Sidewalks Under(TCDC 18.370.020(C)(11)).
Section TCDC 18.370.020(C)(11), the code section that addresses adjustments to
street and sidewalk improvements,reads as follows:
Adjustments for the street improvement requirements Chapter
18.810: By means of a Type II procedure, as governed by section
18.390.040, the director shall approve, approve with conditions, or
deny a request for an adjustment to the street improvement
requirements, based on the findings that the following criterion is
satisfied: strict application of the standards will result in an
unacceptably adverse impact on the existing development, on the
proposed development, or on natural features such as wetlands,
steep slopes, or existing mature trees, in approving an adjustment
to the standards, the Director shall determine that the potential
adverse impacts exceed the public benefits to strict application of
the standards.
Chapter 18.810 of the Tigard Development Code, Street and Utility Improvement
Standards, applies to both public and private improvements. Windwood believes that under
TCDC 18.810.020(D), the adjustment criteria in TCDC 18.370.020(C)(11) applies to all street
improvements, whether public or private improvements. Therefore, Windwood believes that
said criteria should be used for all three requested adjustments.
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Morgan Tracey •
2 r City of Tigard p�L
November 15,2004
Page 6
a. Response to Curb Tight Sidewalk(TCDC 18.810.030(L)).
S.W. 74th Avenue crosses Ash Creek in a deep draw area. The project normally
requires a section of the street with sidewalks separated from the street. Under section
18.810.070(C), planter strips are required between the street and sidewalk, except where the
following exists: there are significant natural features (large trees, water features, etc.) that
would be destroyed if the sidewalk were located as required. A sidewalk in strict conformance
with TCDC 18.810.030(L) will require either filling the stream or increasing the size of a
retaining wall already shown on the plan. Larger retaining walls will require significant footings .
that will encroach into the wetlands. Windwood believes that this type of development will
result in an adverse impact on the stream and/or wetlands.
The curb tight sidewalk as proposed along S.W. 74th Avenue reduces the amount
of impact to wetlands. Furthermore, insistence on strict application of the standards for
sidewalks will not result in a public benefit that exceeds the adverse impacts to the wetlands.
Curb tight sidewalks will not increase any danger to pedestrians. Traffic in the area in question
will be traveling fairly slow to address the sag curve as discussed above. In addition, the
sidewalks will meet the standard for sidewalk widths. Windwood has observed that curb tight
sidewalks are not uncommon along other streets in Tigard. Consequently, the negative impact to
the stream/wetland exceeds any marginal benefit from requiring a planter strip.
b. Response to Cul-de-sac Longer than 200 Feet(TCDC 18.810.030(L)).
Under TCDC 18.810.030, various limitations apply to cul-de-sacs: (1) they shall
be no more than 200 feet long, (2) they shall not provide access to greater than 20 dwelling units,
and (3) they shall only be used when environmental or topographical constraints, existing
development pattern, or strict adherence to other standards in this code preclude street extension
and through circulation. When a cul-de-sac is used, additional standards also apply:
1. All cul-de-sacs shall terminate with a turnaround, Use of
turnaround configurations other than circular, shall be
approved by the City Engineer;
2. The length of a cul-de-sac shall be measures from the
centerline intersection point of the two streets to the radius
point of the bulb; and
3. If the cul-de-sac is more than 300 feet long, a lighted direct
pathway to and adjacent street may be required to be
provided and dedicated to the city.
Due to prior development patterns, there is no way to connect the private street serving the lots to
adjacent streets. Accordingly, there are only two options to access the lots in the proposed
subdivision: 'one is a cul-de-sac and one is a looped street within the subdivision. A looped
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•
City of Tigard
November 15,2004
Page 7
street would have to be constructed in environmentally sensitive land and would require
significant excavation and/or fill. Thus, strict application of City standards would have a
negative impact on natural features. Those impacts outweigh any public benefit from strict
application of the standards. It would appear to Windwood that the 200-ft. requirement is not a
safety standard, but rather a planning device to gain smaller block sizes. Windwood addresses
this concept in more detail in its discussion of the general adjustment standards. The Tualatin
Valley Fire & Rescue ("TVF&R")has reviewed Windwood's plans and indicated that the design •
will not negatively affect safety. Their own code allows 25 houses to be served by a single
access.
2. Adjustments to Streets and Sidewalks Under TCDC 18.370.020(C)(1)(d).
As discussed above, Windwood will also discuss the requested adjustment in the
context of the general adjustment standards. Windwood does not believe the City must get to
this analysis in light of the applications of TCDC 18.370.020(C)(11). The criteria for general
adjustments is:
Adjustments to development standards within subdivisions
(Chapter 18.430). the director shall consider the application for
adjustment at the same time he/she considers the preliminary plat.
An adjustment may be approved, approved with conditions, or
denied provided the Director finds:
a. There are special circumstances or conditions affecting the
property which are unusual and peculiar to the land as
compared to other lands similarly situated;
b. The adjustment is necessary for the proper design or function
of the subdivision;
-
c. The granting of the adjustment will not be detrimental to the
public health, safety, and welfare or injurious to the rights of
- • other owners of property; and
d. The adjustment is necessary for the preservation and enjoyment
of a substantial property right because of an extraordinary
hardship which would result form strict compliance with the
regulations of this title.
The City made findings that as to each of the adjustments Windwood requested,
Windwood submitted sufficient evidence to meet each of the above criteria. LUBA disagreed as
to some of the City's findings. Specifically, as to the adjustment to the sidewalk standards,
LUBA held'that the City's finding that the adjustment would not be detrimental to the public
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City of Tigard [�-!
November 15,2004
Page 8
health , safety and welfare or injurious to the rights of other property owners was inadequate.
LUBA also held that the City's finding that the requested adjustment was necessary for the
preservation and enjoyment of a substantial property right because of extraordinary hardship was
insufficient.
As to the two adjustments Windwood requested to the cul-de-sac standards,
LUBA held that the City's finding on a single criteria—lack of detriment to public health, safety
and welfare—was inadequate.
•
a. Response to Curb Tight Sidewalk TCDC 18.810.030(L)
If a planter strip was placed pursuant to the City standard in the area where S.W.
74th Avenue crosses the creek, a tall retaining wall would have to be placed at the bottom of the
slope to keep from encroaching into the stream. This would create a significant extra cost to an
improvement which already exceeds the proportional improvement cost based on the size of the
subdivision. Also, the wall would become an expensive item to be maintained by the City. This
is an extraordinary hardship on the development and on the City.
Additionally, Windwood has tentatively been allowed by DSL and the Corps of
Engineers to construct a culvert rather than a bridge structure because it has been able to
demonstrate that it is minimizing the fill across the creek by the use of a curb tight sidewalk. If
Windwood is required to construct a planter strip, it mayl not be able to use the culvert and will
be required by the DSL and the Corps of Engineers to construct a bridge. It is an extraordinary
hardship for a 29-lot subdivision to build a bridge across the creek to meet the City's road
standards. Without this demonstration, the road crossing itself and the ability to develop the
property at all was jeopardized. The requirement to build a bridge will not meet the
proportionality test. (The curb tight sidewalk can be considered safe because the area behind the
sidewalk has a flat spot which allows pedestrians to keep to the outside while walking.)
Curb tight sidewalks in the area proposed will not be detrimental to the public
health, safety and welfare or injurious to the rights of other property owners. Curb tight
sidewalks are used often and are an alternate location in many similar public streets throughout
the city. This is not normally a safety concern. Instead, this detail is used where only a few curb
cuts are proposed. Parking strips provide for street furniture and places to put mailboxes, power
poles, streetlights, telephone pedestals, and power pedestals. This area does not have many of
these features. In addition, as discussed above, the traffic in the area of the proposed adjustment
will be traveling relatively slowly due to the topography of the road. With a normal sized
sidewalk, there will not be pedestrian/vehicle conflicts.
b. Response to Cul-de-sac Length (TCDC 18.810.030(L)) (Hardship).
Granting the requested variance will not be detrimental to the public health, safety
and welfare of the public. Nor will it be injurious to the rights of other property owners.
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Morgan Tracey
City of Tigard Q�L
November 15, 2004
Page 9
TVF&R has determined that length does not affect safety. With respect to the number of lots to
be served by a cul-de-sac, Windwood understands that TVF&R makes the determination of
whether the number of lots poses a safety concern. According to Eric McMullin, TVF&R
requires two (2) accesses for safety is when more than 25 residential houses are served by one
access. Here, that standard is met because only 23 houses will be served.
The length of a cul-de-sac is a planning issue related to an attempt to
geometrically control block sizes from becoming too long. This standard allows continuity of
blocks without having long dead-end streets affecting block sizes. Windwood's consultants have
evaluated this issue as part of a team whose responsibility it is to evaluate the methods set by
Metro to control block geometry to increase connectivity. This cul-de-sac length is probably a
response to developing standards utilized by local cities and counties in the Metro region as part
of a Metro planning study. Short cul-de-sacs were recommended as a way to serve internal lots
it blocks with square patterns and cities and counties have implemented these standards. In
actuality, the long cul-de-sac provides safety to residents of the cul-de-sac and surrounding
neighbors by making the exit of robbers who have broken into houses more difficult. Police can
secure an exit by blocking automobile exiting. Additionally, the Windwood's knowledge,
TVF&R raised no safety concerns over the length of Windwood's proposed cul-de-sac.
Opponents of Windwood's proposal testified generally that the adjustments
allowing a longer cul-de-sac that would serve more than 20 residences would increase the
amount of traffic and nearby streets and then concluded with no further evidence that an increase
in traffic will automatically result in decreased safety. Windwood disagrees with that
conclusion. The limited number of additional vehicles that will result from the adjustments as
opposed to the development itself will not automatically result in decreased safety. Without
some specific evidence of how this small increase in traffic will negatively impact safety,
Windwood believes the City should reject the opponents' argument.
Very truly yours,
-
Davis Wright Tremaine LLP
Qimid-D-ptv-A P
Christopher P. Koback
CPK/lkt
cc: Dale Richards, Windwood Construction
Gary Firestone
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PDX 1191299v1 44727-22
•
F.
Appendix # 1
Tree Protection Steps
• It is critical that the following steps be taken to ensure that the trees that are to be retained are
. protected. -
Before Construction Begins
1. Notify all contractors of the tree protection procedures. Have all sub contractors sign
memoranda of understanding regarding the goals of tree protection. For successful tree
protection on a construction site all contractors must know and understand the goals of
tree protection. It can only take one mistake with a misplaced trench or other action to
destroy the future of a tree.
2. Hydraulically deep root fertilize trees to aerate the soil,deep root water the tree and
fertilize it with a balanced fertilizer before construction.
3. Fencing
a. Establish tree protection fencing around each tree.or grove of trees to be retained.
b. The fencing is to be put in place before the ground is cleared in order to protect
• - the trees and the soil around the trees from any disturbance at all.
c. Fencing is to be placed at the edge of the root protection zone. Root protection
zones are to be established by the project arborist based on the needs of the site
and the tree to be protected.
d. Fencing is to consist of 6-foot high metal.fencing tied to steel posts driven into the
ground or free standing with the proper support to prevent it from being moved by
contractors,sagging or falling down. Plastic orange fencing may be acceptable if
properly support to prevent it from sagging and acceptable by the local
jurisdiction.
e. Fencing is to remain in the position that is established by the project arborist and
not to be moved without written permission from the project arborist.
4. Signage
a. All tree protection fencing should have signage explaining the purpose of
the fence. An example would be as follows;
Tree Protection Area
Do Not Enter
Without Written Approval From
Project Arborist or Property Owner
Teragan& Associates
503-803-0017
b. Signage should be place as to be visible from all sides of a tree protection
area and spaced every 75 feet.
3145 Westvicw Circle•Lake Oswego,OR 97034 •(503)697-1975•Fax(503)697-1976
E-mail:
Terry@Teragan.com
Tecagan.com
Certified Arborist ti PN-0120AT
Member,American Society of Consulting Arborists
S69
i -
During Construction
1. Protection Guidelines Within the Root Protection Zone
a. No traffic shall be allowed within the root protection zone. No vehicle,heavy
equipment,or even repeated foot traffic.
b. No storage of materials including but not limiting to soil,construction material,or
waste front the site.
i. Waste includes but is not limited to concrete wash out,gasoline,diesel,
paint,cleaner thinners,etc.
c. Construction trailers are not to be parked/placed within the root protection zone
without written clearance from project arborist.
• d. No vehicles shall be allowed to park within the root protection areas.
e. No activity shall be allowed that will cause soil compaction within the root
protection zone.
2. The trees shall be protected from any cutting,skinning or breaking of branches,trunks or
roots.
3. Any roots that are to be cut from existing trees,the project consulting arborist shall be
notified to evaluate and oversee the proper cutting of roots with sharp cutting tools. Cut
- roots are to be immediately covered with soil or mulch to prevent them from drying out.
4. No grade change should be allowed within the root protection zone.
5. Any necessary deviation of the root protection zone shall be cleared by the project
consulting arborist_
6. Provide water to trees during the summer months. Tree(s)will have had root system(s)
cut back and will need supplemental water to overcome the loss of ability to absorb
necessary moisture during the summer months.
7. Any necessary passage of utilities through the root protection zone shall be by means of
tunneling under roots.
After Construction
1. Carefully landscape in the area of the tree. Do not allow trenching within the root
protection zone. Carefully plant new plants within the root protection zone. Avoid
cutting the roots of the existing trees.
2. Do not plan for irrigation within the root protection zone of existing trees unless it is drip
irrigation for a specific planting or cleared by the project arborist.
3. Provide for adequate drainage of the location around the retained trees.
4. Pruning of the trees should be completed as one of the last steps of the landscaping II
process before the final placement of trees,shrubs,ground covers,mulch or turf.
5. Provide for inspection and treatment of insect and disease populations that capable of
damaging the retained trees and plants.
6. Trees should be fertilized and inoculated with mycorrhizae treatments if damaged. All
other trees should also be evaluated for fertilization need at the end of the project and
treated as necessary.
•
3145 Wcstvicw Circle•Lake Oswego,OR 97034•(503)697-1975•Fax(503)697-1976
E-mail:Terry@Tcragan.com
• Certified Arborist PA-0120AT-
Member,American Society ofConsulting Arborists
S70
CERTIFICATE OF FILING
I hereby certify that on April 20, 2005 I filed the original and 2 copies of this FIRST
SUPPLEMENTAL RECORD AND FIRST SUPPLEMENTAL INDEX with the Land Use
Board of Appeals,Public Utility Commission Building, 550 Capitol Street NE, Suite 235, Salem,OR
97301-2552 by first class mail.
Dated this 20 day of April, 2005.
RAMIS CREW CORRIGAN& BACHRACH, LLP
C (/.10$,A..t..
Gary Fires n , 0 B#87221
Attorney or Respondent City of Tigard
II
I
CERTIFICATE OF FILING
CERTIFICATE OF SERVICE
I hereby certify that I served the foregoing FIRST SUPPLEMENTAL RECORD AND FIRST
SUPPLEMENTAL INDEX on the following party:
Christopher P. Koback John Frewing
Davis Wright Tremaine 7110 SW Lola Lane
1300 SW Fifth Ave, Ste 2300 Tigard, OR 97223
Portland, OR 97201
by mailing a true and correct copy thereof to said party on the date stated below.
DATED April 20, 2005.
RAMIS CREW CORRIGAN & BACHRACH, LLP
Gary Fire •ne OSB No.: 87221
Attorney for Respondent City of Tigard
CERTIFICATE OF SERVICE