Resolution No. 14-24 This Resolution was superseded by
Resolution No.14-35 on June 24,2014
CITY OF TIGARD,OREGON
RESOLUTION NO. 14- d1
A RESOLUTION TO AMEND THE WATER SYSTEM MASTER PLAN TO INCLUDE PROJECTS
NECESSARY FOR THE DEVELOPMENT OF RIVER TERRACE
WHEREAS, the City of Tigard annexed the River Terrace area west of Bull Mountain in 2011 and 2012;
and
WHEREAS,the City of Tigard has completed the water portion of the River Terrace Community Plan, and
WHEREAS,water public facility projects have been identified as part of that plan,and
WHEREAS,these projects are appropriate to be added to the City of Tigard Water Master Plan,and
WHEREAS, the City of Tigard may desire to use water system development charges to fund part of all of
these projects,
NOW,THEREFORE,BE IT RESOLVED by the Tigard City Council that:
SECTION 1: The projects listed in the Water System Master Plan Addendum (Exhibit A) are hereby
added to the Water System Master Plan.
SECTION 2: The projects on this list shall be eligible for funding from water system development charges
(SDCs) collected in the Tigard Water Service Area as allowed under section 3.24.060 of the Tigard
Municipal Code.
SECTION 3: This resolution is effective immediately upon passage.
PASSED: This 0 day of 14 ILZ— 2014.
"I
Nit City of Tigard
ATTEST:
r
City Recorder-City of Tigarff
RESOLUTION NO. 14- ,.. t J
Page 1
EXHIBIT A
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ACKNOWLEDGEMENTS
We would like to thank the many citizens, staff, and community groups who provided
extensive input into the development of this Water Plan Addendum. Special thanks are due
to the members of the River Terrace Technical Advisory Committee and Stakeholder
Working Group.
CITY STAFF
Susan Shanks, Project Manager and Senior Planner
Tom McGuire, Assistant Community Development Director
Rob Murchison, Senior Project Engineer
Marissa Grass, Associate Planner
Kenny Asher, Community Development Director
Michael Stone, City Engineer
Brian Rager, Interim Public Works Director
John Goodrich, interim Assistant Public Works Director
Prepared by Murray, Smith & Associates, Inc.
January 2014 PROfff
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Brian M. Ginter, P.E. V 62947 y
Heidi A. Springer, P.E.
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SA
RENEWS 6-30- 15
13-1484 River Terrace Community Plan
January 2014 City of Tigard
TABLE OF CONTENTS
SUMMARY OF RECOMMENDATIONS ............................... l
I. INTRODUCTION ........................................................ 2
II. BASIS OF PLANNING AND
WATER DEMAND PROJECTIONS .......................... 3
III. SYSTEM ANALYSIS AND RIVER TERRACE
WATER SYSTEM CAPACITY .................................. 4
IV. CAPITAL IMPROVEMENT PLAN............................ 8
13-1484 River Terrace Community Plan
January 2014 City of Tigard
f
SUMMARY OF RECOMMENDATIONS
The focus of this Water System Master Plan Addendum is on providing water service to the
River Terrace Community, which is a new area that the City of Tigard's 2010 Water System
Master Plan addressed only for overall water supply capacity needs. The proposed changes
do not affect the 2010 Water System Master Plan except for minor modification of the
forecasted system-wide water demands.
The River Terrace Community is divided into the three pressure zones extending across the
area, for the purposes of analysis, identified as the 410 Zone, 713 Zone and 550 Zone.
Recommendations for the 410 Zone include construction of a transmission loop extending
north to south across the River Terrace area, connecting to existing transmission piping at
SW Barrows Road and at SW Beef Bend Road. Recommendations for the 550 Zone include
new transmission, storage and pumping facilities. An analysis of water service
recommendations and alternatives is provided in the following pages.
13-1484 Page 1 of 9 River Terrace Community Plan
January 2014 City of Tigard
I. INTRODUCTION
In 2010, the City of Tigard updated the community's Water System Master Plan, hereafter
referred to as the Water Plan. The Water Plan is the document that guides water system
infrastructure improvements in the city's water service area. It was presented to the
Intergovernmental Water Board and the Tigard City Council in 2010.
Since the adoption of the Water Plan in 2010, the West Bull Mountain Concept Plan
(WBMCP) was completed and adopted by Washington County and the city. The area now
known as River Terrace (and formerly known as West Bull Mountain) was also annexed to
the city. This addendum provides an update to the Water Plan specific to the River Terrace
study area and contributes to the city's broader goal of completing a River Terrace
Community Plan.
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Figure 1 River Terrace Study Area(Outlined in Yellow)
The WBMCP Alternative Water Supplies analysis provides the basis for water system
planning in River Terrace, which consists of transmission, pumping and storage
improvements. This Water Plan Addendum refines the WBMCP by evaluating specific
facility needs to provide service to the study area, identified in Figure 1,through
improvements to the existing Tigard water system.
13-1484 Page 2 of 9 River Terrace Community Plan
January 2014 City of Tigard
II. BASIS OF PLANNING AND WATER DEMAND PROJECTIONS
This Water Plan Addendum follows the City of Tigard's 2010 Water System Master Plan
and assumes 2.48 persons per dwelling unit. The City of Tigard projects 2,587 dwelling units
within River Terrace for an estimated build-out population of 6,416 in 2035.
River Terrace Water Demands
Projected water demands in million gallons per day (mgd) for the River Terrace Community
are calculated for this addendum by multiplying projected River Terrace population at build-
out by estimated per capita demands. Water facilities recommended to serve River Terrace
are sized to meet ultimate capacity needs at build-out as discussed later in this addendum. Per
capita water demands are as follows, consistent with the 2010 Water System Master Plan:
• Average Day Demand (ADD) = 110 gallons per capita per day (gpcd)
• Peak Day Demand (PDD)=231 gpcd
The River Terrace water demand at build-out is allocated to the city's 410, 713 and 550
pressure zones according to the percentage of River Terrace land at elevations similar to
those of existing Tigard water customers in these pressure zones. Proposed pressure zone
boundaries within the River Terrace Community are illustrated on Figure 4. The
distribution of River Terrace water demands by zone is as follows:
• 410 Zone= 50 percent
• 713 Zone= 10 percent
• 550 Zone=40 percent
Forecasted River Terrace water demands at build-out are summarized in Table 1.
Table 1
River Terrace Projected Water Demand at Build-Out
Pressure
Zone ADD (mgd) PDD (mgd)
410 0.35 0.74
713 0.07 0.15
550 0.28 1 0.59
TOTAL 0.70 1.48
13-1484 Page 3 of 9 River Terrace Community Plan
January 2014 City of Tigard
III. SYSTEM ANALYSIS AND RIVER TERRACE WATER SYSTEM CAPACITY
In order to provide water service to the River Terrace Community, the city must evaluate
necessary supply and storage capacity as well as transmission piping.
Water Supply Capacity
The city is currently developing a large, long-term supply source through the Lake Oswego-
Tigard Water Partnership. The forecasted River Terrace build-out peak demand comprises an
insignificant fraction of this supply source capacity. No additional supply facilities are
anticipated to serve River Terrace.
Storage Capacity
The city's 2010 Water System Master Plan defined criteria for assessing adequate storage
capacity in each of Tigard's pressure zones. Required storage capacity is divided into three
major components—operational storage, fire flow storage and emergency storage—which
are defined as follows:
• Operational Storage—25 percent of PDD
• Fire Flow Storage—land use with highest fire flow requirement within the zone
o Residential
■ Low Density= 1,500 gallons per minute(gpm) for 2 hours
■ Medium Density=2,500 gpm for 2 hours
■ High Density= 3,000 gpm for 3 hours
o Commercial and Industrial
■ 3,000 gpm for 3 hours
• Emergency Storage— 2 times ADD
Based on these criteria, adequate storage is available in the 410 and 713 pressure zones to
serve the relatively small additional demands from River Terrace. Storage capacity
assessment in the 550 Zone depends upon the selected River Terrace 550 water service
alternative as discussed later in this memo.
River Terrace Proposed Water System Facilities
410 Zone
The Tigard 410 Zone serves a majority of existing Tigard customers. Large diameter
transmission piping has been extended west with development of the Bull Mountain area in
anticipation of the ultimate extension of the 410 Zone to serve the River Terrace area. It is
recommended that existing 18-inch diameter piping on SW Roy Rogers Road at SW Scholls
Ferry Road to the north and on SW Beef Bend Road near SW 150th Avenue to the south be
extended as new 20-inch diameter pipe west into River Terrace. The existing 18-inch
13-1484 Page 4 of 9 River Terrace Community Plan
January 2014 City of Tigard
diameter piping to the north was recently installed in SW Scholls Ferry Road to serve the
River Terrace area.
Given the likelihood that the earliest development in the 410 Zone may not all occur near the
north or south connections to existing 410 Zone transmission,provisions should be made for
extending service into the 410 Zone areas in advance of major transmission piping in SW
Roy Rogers Road. It is recommended that a new pressure reducing valve(PRV) station be
constructed near the intersection of SW Bull Mountain Road and SW Roy Rogers Road to
allow for interim service and for future supply redundancy to this area.
Conceptual level cost estimates for the recently installed 18-inch diameter transmission
piping, the proposed 20-inch diameter transmission piping, and the proposed PRV station are
presented later in this addendum. Cost estimates are based on an assumed transmission main
alignment which generally follows SW Roy Rogers Road from existing transmission piping
south to the proposed River Terrace rights-of-way shown on Figure 4. These proposed River
Terrace rights-of-way will carry transmission piping west to SW 150th Avenue at SW
Woodhue Street and south on SW 150th Avenue to existing transmission piping on SW Beef
Bend Road.
713 Zone
A small area of the River Terrace Community northwest of SW 150th Avenue and SW
Woodhue Street will be served by the Tigard 713 Zone as shown on Figure 4. It is
recommended that this area be served by extending distribution mains from existing 8-inch
and 12-inch diameter piping on SW 150th Avenue. No additional transmission piping or
other facilities are anticipated to serve this area.
550 Zone Service Alternatives
The existing Tigard 550 pressure zone is divided into sub-zones 550A through 550H which
form a partial ring at the base of Bull Mountain. Establishment of these sub-zones in the
Tigard water system allowed customers at this elevation to be served as development
occurred without constructing looped transmission piping all the way around Bull Mountain
at this elevation. Large diameter transmission piping has been extended through each of these
sub-zones to facilitate completion of a transmission loop around Bull Mountain with the
development of the River Terrace Community. Due to incomplete transmission piping in
some parts of the 550 sub-zones, completing this transmission loop may not be the most
effective way to serve customers in River Terrace. Two facility alternatives were developed
to provide service to the River Terrace portion of the 550 Zone. These alternatives are
illustrated on Figures 5 and 6.
• Alternative 1 —construct two missing 550 transmission connections near King
City and complete transmission loop through River Terrace
13-1484 Page 5 of 9 River Terrace Community Plan
January 2014 City of Tigard
• Alternative 2—construct 550 pump station and reservoir to deliver water from
existing 410 Zone Menlor Reservoir and connect River Terrace transmission
piping to existing 550 Zone transmission
For both Alternatives 1 and 2, approximately 8,000 lineal feet(LF) of 16-inch diameter
mains would provide north-south transmission through the River Terrace 550 Zone. The
alignment of this transmission piping would follow proposed rights-of-way through River
Terrace with connections to existing 550 Zone piping at three locations: SW Venezia
Terrace, SW Bull Mountain Road and SW 161st Avenue. This proposed 550 transmission
piping is illustrated on Figure 6.
Alternative 1 would require additional transmission piping within River Terrace and between
existing sub-zones 550A, 550G and 550H. Within River Terrace,transmission piping
described in the previous paragraph would be extended approximately 4,000 LF south and
west from SW 161st Avenue to connect to existing 12-inch piping at SW 150th Avenue and
SW Woodhue Street. In order to complete 550 Zone transmission around the west side of
Bull Mountain, sub-zone 550A must be connected with 550H east of SW Colyer Way and
sub-zone 550H must be connected with 550G east of SW Peachtree Drive near King City.
Both of these connections require potentially complex crossings of Clean Water Services
(CWS) designated stream corridors outside of existing public right-of-way. In addition to
construction feasibility issues, significant land acquisition would likely be required to
facilitate construction of stream crossings.
Alternative 2 uses proposed River Terrace 550 Zone transmission piping to connect existing
sub-zones 550A, 550B and 550C. The expanded West Bull Mountain 550 Zone would be
supplied by a proposed reservoir on the city-owned Cach properties. A new pump station
adjacent to the city's 410 Zone Menlor Reservoir would supply the proposed Cach Reservoir.
Until the proposed pump station is completed, the reservoir could be filled by an existing
temporary pump station at the Menlor site which was constructed for the city's Pump Station
10 expansion project. Alternative 2 would also require installation of transmission piping
from the proposed Cach Reservoir site to connect to existing 550B piping on SW 158th
Terrace at SW Baker Lane. Proposed transmission piping from 550B to the proposed
reservoir site would require crossing a CWS designated stream corridor in the city-owned
Cach Park Natural Area. Unlike Alternative 1, no property acquisition is anticipated to
facilitate construction of this stream crossing.
Recommendation:Alternative 2
It is recommended that the River Terrace Community 550 Zone be served from a new
reservoir and pump station as described in Alternative 2. Alternative 2 would provide
adequate fire and emergency storage within the 550 Zone rather than relying on pressure
reducing valves to provide supply from the 713 Zone reservoirs which have inadequate
existing capacity to serve forecasted 550 Zone demands as presented in the 2010 Water Plan.
13-1484 Page 6 of 9 River Terrace Community Plan
January 2014 City of Tigard
Proposed 550 Zone Cach Reservoir Storage Capacity
The proposed Cach Reservoir, required for recommended 550 Zone service Alternative 2,
must be sized to provide adequate storage capacity for sub-zones 550A, 550B, 550C and the
River Terrace 550 Zone area. Projected demands for sub-zones 550A through C in 2030 are
taken from the 2010 Tigard Water System Master Plan. River Terrace 550 build-out demands
are presented in Table 1 of this addendum.
Storage capacity criteria are consistent with the 2010 Water Plan as described earlier in this
addendum. Required fire flow capacity is 3,000 gpm for 3 hours based on the proposed
school in the River Terrace 550 Zone. It is recommended that the Cach Reservoir have an
approximate capacity of 3.0 million gallons (MG) as summarized in Table 2.
Table 2
Proposed 550 Zone Cach Reservoir Capacity
West Bull Mt ADD PDD Required Storage(MG)
550 Zone (mgd) (mgd) Operational Fire Emergency TOTAL
550A 0.09 0.19 0.05 0.18
550B 0.34 0.71 0.18 0.68
550C 0.24 1 0.50 0.13 0.48
River Terrace 0.28 0.59 0.15 0.56
TOTAL 0.95 1.99 1 0.51 1 0.54 1.9 2.95
Notes:
1. Sub-zone 550A and 550C demands are taken from the 2010 Water System Master Plan demand
tables for the year 2030.
2. Sub-zone 550B 2030 demands have been re-calculated for this Addendum to exclude land
which is now part of the River Terrace Community.
3. Operational storage is estimated as 25 percent of PDD.
4. Fire storage is based on a required fire flow of 3,000 gpm for 3 hours due to the proposed
school in the River Terrace 550 Zone.
5. Emergency storage is estimated as 2 times ADD.
Proposed 550 Zone Pump Station Capacity
The proposed 550 Zone pump station at the Menlor Reservoir site should have adequate firm
capacity to supply PDD for the proposed West Bull Mountain 550 Zone. Firm capacity is
defined as the total pump station capacity with the largest pump out of service. This criterion
for pump station sizing is consistent with the city's 2010 Water System Master Plan. As
shown in Table 2, total PDD for the West Bull Mountain 550 Zone, a combination of 550A,
B, C and River Terrace sub-zones, is 1.99 mgd or 1,382 gpm. It is recommended that the
proposed 550 pump station on the Menlor site have an approximate firm capacity of 1,400
gpm.
The existing temporary pump station at the Menlor Reservoir site has a single pump with a
1,500 gpm design capacity. The temporary pump station is equipped with a variable
frequency drive (VFD). Although this pump station is capable of supplying adequate flow to
13-1484 Page 7 of 9 River Terrace Community Plan
January 2014 City of Tigard
the proposed Cach Reservoir it lacks the redundancy provided by multiple pumps, thus a
permanent pump station is required to replace the existing station.
Future Service to Urban Reserve Areas
Water service to the Urban Reserve Area(URA), URA6C (North), URA 6C (Middle) and
URA 6C (South) assumes that the recommended 410-foot pressure transmission piping for
the River Terrace area is constructed. All three URA areas are at an elevation that can be
served directly from the 410-foot pressure zone. Existing storage facilities and proposed
transmission piping for the River Terrace area are adequate to extend the water distribution
piping grid to these areas for water service. It is anticipated that looped 8-inch to 12-inch
diameter piping will be adequate for residential development in these areas. Larger
transmission piping may be required if high density residential, commercial or industrial
development is planned in these areas.
IV. CAPITAL IMPROVEMENT PLAN
Summary of Recommendations and Conceptual Level Costs
It is recommended that water service be provided to the River Terrace Community by
extending transmission and distribution mains from the City of Tigard's existing 410, 713
and 550 pressure zones. The 713 Zone includes only a small area of the River Terrace area
that can be effectively served by extending existing distribution mains with no additional
transmission required. Proposed piping would be placed in public rights-of-way to be
dedicated as part of the River Terrace development. Proposed public rights-of-way are
illustrated on Figure 4.
Adequate storage is available in the 410 and 713 Zones to serve proposed customers in River
Terrace. It is recommended that a 3.0 MG storage reservoir be constructed to serve the River
Terrace 550 Zone as part of a larger West Bull Mountain 550 Zone which would include the
existing 550A, 550B and 550C sub-zones. This proposed 550 Zone reservoir would be
constructed on the city-owned Cach properties. The reservoir would be filled through a new
pump station with a firm capacity of 1,400 gpm located at the 410 Zone's Menlor Reservoir
site. Until the proposed pump station is completed, the proposed Cach Reservoir may be
filled from an existing temporary pump station on the Menlor site with a design capacity of
1,500 gpm. Service from the proposed Cach Reservoir would also require installation of
transmission piping from the reservoir site to existing 550B piping on SW 158th Terrace at
SW Baker Lane.
Conceptual level costs for proposed water facilities to serve the River Terrace Community
are presented in Table 3. Cost estimates represent opinions of cost only, acknowledging that
final costs of individual projects will vary depending on actual labor and material costs,
market conditions for construction, regulatory factors, final project scope, project schedule
and other factors. The American Association of Cost Engineers (AACE) classifies cost
estimates depending on project definition, end usage and other factors. The cost estimates
presented here are considered Class 4 with an end use being a study or feasibility evaluation
13-1484 Page 8 of 9 River Terrace Community Plan
January 2014 City of Tigard
and an expected accuracy range of-30 percent to +50 percent. This range represents the
potential variability of project costs and should not be applied directly to the estimates
presented in Table 3. Estimated costs include approximate construction costs and an
allowance for administrative, engineering and other project related costs. Unit costs for
transmission piping are based on unit costs presented in the 2010 Tigard Water System
Master Plan.
Since construction costs change periodically, an indexing method to adjust present estimates
in the future is useful. The Engineering News-Record (ENR) Construction Cost Index (CCI)
is a commonly used index for this purpose. For purposes of future cost estimate updating, the
current ENR CCI for Seattle, Washington is 10135 (November 2013).
Table 3
River Terrace Proposed Water Facilities Conceptual Cost Estimates
Total Conceptual
Proposed Facility qty Unit Unit Cost Cost
410 Zone:
18-inch Transmission Main 2,500 LF - $1,398,500(1)
20-inch Transmission Mains 15,200 LF $400 $6,080,000
550 Zone to 410 Zone PRV 1 LS $200,000 $200,000
713 Zone:
None - - - -
550 Zone(Alternative 2):
16-inch Transmission Mains
through River Terrace 8,000 LF $350 $2,800,000
3.0 MG Cach Reservoir 1 LS $5,400,000 $5,400,000
16-inch Transmission from
Reservoir to 5506 1,700 LF $350 $595,000
1,400 gpm (firm capacity)
Pump Station 1 LS $1,100,000 $1,100,000
Note:
1. This cost is the City of Tigard's budgeted amount for the installation of this pipe.
13-1484 Page 9 of 9 River Terrace Community Plan
January 2014 City of Tigard
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n
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• •
�'siG y .1 of �•��
SCALE IN FEET •IJ^\�• `�) a rr reuar Y 1ti��•1.��:� ' -!la r
- �� r `�!_'!It `•1•�Lrt. 1gll�t�t�s--Y--
? • ,4. •h>.._.e WA�R.BiiX1 !i•1 i..
LEGEND
RIVER TERRACEMUNITY STUDY Assi
!� URBAN RESERVE AREAS
�� - 7,•1 Our 'all
�/y -'1�"`\.. i�1'v,cl1C'{Jir��s���5 \ o��•;; Ilc.nun �A
CITY OF TIGARD
11....ralssfiss,1111isi VER TERRACE COMMUNITY PLAN
la CONTOURS WN
11 4!,•1 ,fi��i :��i C`�i���S�
Vii/
1S ,.,� • BOUNDARIES
PRESSURE ZONES(HOL): 112i 'AllJ RrG•�sI
i1J�
930
713
890
NSA
+
t�/m ■��I �fifl\w���rer>sr �7�� ■�J,15319€1'Ziti",Cin:ui;lprernn�)
mNE Ant
!=_� AI FIGURE 5
j COINNECT TO,
EXISTING j eMENLOR I I
RESERVOIR
550;ZOC�� - �-------= `,
'CAP:3.5 MG
TR 'NSMISSION CIE:410'
I '1 b�; -8,. '•'- ` - CITY OF TIGARD
RIVER TERRACE COMMUNITY PLAN
1
RIVER TERRACE 550-ZONE
SERVICE ALTERNATIVE 1
January 2014
r
MSA
o! 1 s., r I •1
J
.1-d-w4m n[Htn_5ew
_W1 i 6 12 II rraawr.w" FowLm 13-1484
SW BULL MOUNTAIN RDLU
a
p..
i
0 >.
p t
CONNECT TO
ml z -L —; i �" x, EXgSTING i N
I L\ 5 0 1.200
I a t MISSION a
SCALE IN FEET
! 11 C='--•--•-�-• Q- -{ii l \ 2
SOU
7 `� r ^OONTOOURS-CLEAN WATER SERVICES.
1i -* - - ••—. ___ _--y r' AERIAL PHOTO-ESRIARCGIS ONLINE(JULY 2010).
T - ' -- NATER SYSTEM-CRY OF TIGARD(DEC 2010).
ALL OTHER BASEMAPPING METRO/RLIS(NOV 2013
CONNECT TO 6
EXISTING
550-ZONE — — i
IVB SS CONSTRUCT
; 550-ZONA,.
— — — -1i� __-6•' -'--� �f1� (. _ SW WO ,3{,
�TRANSMISSION"
ION
12` 12Oc 1T72
F
LEGEND
�- ,rye _ ?�; i �••�
PROPOSED WATER MAIN
550 PRESSURE ZONE '�_ 14----------
L_ PROPOSED RIGHT-OF-WAY —
� NATURAL RESOURCE CORRIDOR
--- TIGARD CITY LIMITS
12 EXISTING WATER MAIN SW BEEF BEND RD
— 11 1�_r
——— 10'CONTOURS
-.d 4/212014 11 25.23 AM DNH
FIGURE 6
iCONNECT TO', �,F.. z 72' ME'NZ i pl--•-_I 'L-�__ `-
i EXISTING it RESERVOIR PROPOSED •
j F• b.. I CAP-3.5 mb
_ i
55%ZONE 1 A 55Q-FOOT---
1 1 k I� of ao_`J �? PUMP STATION
i TR/�NSMISSIOII , e' N
CITY OF TIGARD
PROPOSED - RIVER TERRACE COMMUNITY PLAN
550-FOOT
i RIVER TERRACE 550-ZONE
ROsy _ _RESERVOIR, SERVICE ALTERNATIVE 2
— ---•---i - �� I• _ 9iI RO h -• �i 1 .`..�.�. .�__. I _ January 2014
&lcom I .
MSA
--�!R co I:Isrsrow" R MWLSr
mac w. '� I 6.. I1 AA�lMgllMxw� IOWIIf1@ 13-1484
7�.• _. •.�i_.
,r 2' s
SW BULL MOUNTAIN RD 12 Lu
I;
af� 5' fONNECT TO
EXISTING N
i0 1.200
X50-ZONE:
I ,
I i k TRANSMISSION
1
SCALE IN FEET
12 SOURCE
rONTOURS-CLEAN WATER SERVICES.
I — �\l ----_ -- ___—_--•__ AERIAL PHOTO-ESRIARCGIS ONLINE(JULY 2010).
\ -L `NATER TEM-CITY OF TIGARD(DEC 2010).
ALL OTHERSYSBASEMAPPING METROIRLIS(NOV 2013).
It
LEGEND
1.
SW WOODH.0 x
PROPOSED RESERVOIR ` .zt I
.I
'r
PROPOSED PUMP STATION
9.
- PROPOSED WATER MAIN '� " '`' a r:- •�� ,ti
-
_ 550 PRESSURE ZONE
PROPOSED RIGHT-OF-WAY - ij,L:. —
NATURAL RESOURCE CORRIDOR ' � ��' _ �'' -'-"�~ �•
---' TIGARD CITY LIMITS
12.. SW BEEF BEND RD
EXISTING WATER MAIN
7IF-- 10'CONTOURS 1 --
r �, — — •-- —`"`" ` FIGURE 7
r
CONNECT TQ
EXISTING
410-ZONE I ltatn1�11r�E — ,
TRANSMISSION-�� I' ! -- `! I ' P.I�OPOSED
MENLOR ! I 550-FO_Oi•--•--- CITY OF TIGARD
RESERVOIR ! —PU P RIVER TERRACE COMMUNITY PLAN
�y M S ATION
CAPS 35 MG I V P) �
!I
oE: 410' �.., ``•--'- RIVER TERRACE PROPOSED
�I `,� ,\•_-•_� PROPOSED : WATER SYSTEM IMPROVEMENTS
i — 550-FOOT
January 2014
0 RESERVOIR
En
O
I`I .!.i.._..�
1 R ; Ins>fsr.�ra nnitw 5,r
O MSA
LU
y�� Qi-1 13-1484
Ix
SW BULL MOUNTAIN RD
D N 1.200
iN,\-
I
l�
i QECT TO
SCALE IN FEET
ING t � , - SOURCE
550-ZONE TO ! -ZONE _ ONTOVRS-CLEAN WATER SERVICES
_ 1 ISO•- { AERIAL PHOTO•ESR I ARC GIS ONLINE(JULY 2010),
410-ZONE PRV, •'I y I ALL OTHER RASEMAPPNGTMETRO.RLEIS NOV 20171
i TRANSMISSIONNATER SYSTEM-CITY OF
! IF T
LEGEND
O PROPOSED RESERVOIR I .^ -
I "1
-'i� r.. - .-..
SW WOODHUE ST '
PROPOSED PUMP STATION - ii I _i F
PROPOSED WATER MAINS
410 PRESSURE ZONE
550 PRESSURE ZONE !14..._-•CONNECT TO '"` A_!
PROPOSED RIGHT-OF-WAY - '- { _ `' .- ---
T
-�FJ
f—� �� � � �IIr1- EXFSTIN�C--
O NATURAL RESOURCE CORRIDOR �I 41 O-ZONE �+
TIGARO CITY LIMITS - ,`. TRAN �SSION -
_ lill + � � _
p :L tt - i,
12" EXISTING WATER MAINS - - E,�1�- _ �- " �'� I I � - .
�F
-- 10'CONTOURS 5�6 _ � .. _ _ -- _ /ice opt
rI71