12/12/2012 - Packet Intergovernmental Water Board Agenda
SERVING TIGARD, KING CITY,DURHAM AND TIGARD WATER DISTRICT
MEETING DATE: Wednesday, December 12, 2012, 5:30 p.m.
MEETING LOCATION: Tigard Public Works Building
8777 SW Burnham Street
Tigard, OR 97223
1. Call to Order, Roll Call and Introductions
2. Approval of Minutes —November 14, 2012
Action: Motion to approve the November 14, 2012 minutes.
3. Public Comments
Call for comments from the public.
4. Water Supply Update—John Goodrich
No action required.
5. City of Tigard Future Water Supply Development—John Goodrich
Presentation by Brian Ginter, P.E., Murray Smith &Associates, Inc.
No action required.
6. Briefing on the November 21, 2012, Boil Water Advisory—John Goodrich
No action required
7. Informational Items
8. Non-Agenda Items
Call for non-agenda items from the board.
9. Next Meeting:
January 9, 2013, at 5:30 p.m.
Public Works Auditorium, 8777 SW Burnham Street, Tigard, Oregon
10. Adjournment
Action: Motion for adjournment.
Executive Session
The Intergovernmental Water Board may go into Executive Session. If an Executive Session is called to
order, the appropriate ORS citation will be announced identifying the applicable statute. All discussions
are confidential and those present may disclose nothing from the Session. Representatives of the news
media are allowed to attend Executive Sessions, as provided by ORS 192.660(4), but must not disclose
any information discussed. No Executive Session may be held for the purpose of taking any final action or
making any final decision. Executive Sessions are closed to the public.
INTERGOVERNMENTAL WATER BOARD AGENDA— December 12, 2012
City of Tigard 1 13125 SW Hall Blvd.,Tigard,OR 97223 1 503-718-2591 1 www.tigard-or.gov I Page 1 of
Agenda Item No.: �L _
IWB Meeting Date: --� '/p /a—
Intergovernmental Water Board (IWB) Minutes
SERVING TIGARD,KING CITY,DURHAM AND TIGARD WATER DISTRICT
MEETING DATE: Wednesday, November 14, 2012, 5:30 p.m.
MEETING LOCATION: Tigard Public Works Building
8777 SW Burnham Street
Tigard, OR 97223
Members Present:
Gretchen Buehner Representing the City of Tigard
Ken Henschel Representing the Tigard Water District
Keith Jehnke Representing the City of Durham
Dick Winn Representing the City of King City
Andrew Barrett Member-At-Large
Members Absent:
None
City of Tigard Staff Present:
Dennis Koellermeier Public Works Director
John Goodrich Utility Division Manager
Greer Gaston IWB Recorder
1. Call to Order, Roll Call and Introductions
Commissioner Winn called the meeting to order at 5:32 p.m.
2. Approval of Minutes — September 12, 2012
Commissioner Buehner moved to approve the September 12, 2012, minutes.
Commissioner Henschel seconded the motion. The motion passed by unanimous vote
of the commissioners present, with Commissioners Barrett, Buehner, Henschel,Jehnke
and Winn voting yes.
3. Public Comments
There were no comments from the public.
4. Water Supply Update
Mr. Goodrich reported:
■ Average water use for the month of October was about 4.5 million gallons per day
(mgd). This is about .5 mgd more than was used in October 2011.
Page 1 of 6
■ At present aquifer storage and recovery (ASR) well 1 is being utilized for native
groundwater storage.
■ Ninety million gallons of water are currently stored in ASR well 2. Injection started
today, and staff expects to store about 215 million gallons of water prior to next
summer. This amounts to about a 48-day supply.
■ The winter edition of Know H2O went out last week. An article announcing
another 14 percent rate increase was included in the publication. Mr. Goodrich is
tracking customer calls generated by the article.
Note:More information on Know H2O appears under agenda item 7.
■ The board discussed water rates as they pertain to meter size and fixture count.
Later in the meeting, Mr. Goodrich provided the commissioners with handouts on
information and calculations related to meter size and fixture count. The handouts
are on file in the IWB record.
5. Update on the Draft Intergovernmental Agreement for Water Service
Mr. Koellermeier noted the draft IGA (intergovernmental agreement) for water service
(King City Version), dated October 26, 2012, and had been handed out to the
commissioners. The IGA is on file in the IWB record.
Mr. Koellermeier reported:
■ The City of Tigard (COT) will take the 1994 state law approach. The approach
would mirror that of a private utility such as Portland General Electric or Clean
Water Services. Each of the IWB jurisdictions (Durham, King City and the
Tigard Water District) could decide to turn its distribution assets over to the
COT and have Tigard maintain those assets or retain its assets and pay for
service via a service agreement.
■ A franchise fee/right of way fee paid by Tigard to the IWB jurisdictions is
included in the IGA; Mr. Koellermeier suggested debt service should be
excluded from the fee computations.
■ King City had concerns about the COT serving areas annexed in the future and
proposed that Tigard would be responsible for providing water within the legally
recognized boundaries of any of the member jurisdictions. If those boundaries
are extended,Tigard would supply water to new areas within the boundaries.
■ There had been discussion on whether to disband the IWB and instead have the
COT report directly to other city governments/district as a part of its budget
process.
Page 2 of 6
■ King City asked about restricting the provision of water service outside
municipal boundaries. Language to this effect will be incorporated into the IGA.
■ The agreement would be perpetual; this addresses the concern about a future
water source for member jurisdictions.
■ The COT would like to get out of business of buying and selling assets from and
between the member jurisdictions. If, years from now, a jurisdiction would like
to take its water system back from the COT, and the COT had invested more
than the average cost to maintain system, the COT would ask for some type of
true up to that cost. In such a scenario, the COT could become a water
wholesaler and provide water to that jurisdiction; the jurisdiction would run its
own water system.
Commissioner Winn indicated King City was interested in turning its infrastructure over
to the COT. He considered the new arrangement with the COT similar to other utilities.
Mr. Koellermeier mentioned that the member jurisdictions may decide to enter into one
agreement, or separate agreements could be made with each jurisdiction.
In response to the bullet point above, Commissioner Jehnke questioned—if the
City of Durham turned its water system over to the COT and then decided to
take the system back—it may have to pay additional costs.
Mr. Koellermeier replied that a jurisdiction can decide to hold on to its
distribution system and have Tigard run it. If a disproportionate amount of
Tigard's operation and maintenance budget is used to improve or repair the
jurisdiction's system, and the jurisdiction subsequently decides not to have
Tigard run its system, then the jurisdiction would be responsible for the excess
operational and maintenance costs.
■ The other scenario would be if a jurisdiction turned everything over to COT. The
COT would figure the cost into the rates and distribute it evenly over the entire
service area.
■ The COT is still unsure of the differential cost issues with the above scenarios.
■ The COT is in its first year of a 20-year debt repayment scenario. If the member
jurisdictions want to explore other water providers/options, now is the time to
explore those options—before the jurisdictions' customers fund several years of
debt service payments.
Page 3 of 6
■ The COT City Council liked the direction of moving away from a partnership to a
service provider role.
Commissioner Buehner added the COT City Council typically works in conjunction with
some type of an advisory board, like the IWB.
Commissioner Winn recommended additional discussion set up as a future agenda item;
other commissioners concurred.
Mr. Koellermeier stated an updated draft IGA will be available soon; he will distribute
this to the I" members. The commissioners agreed to wait until the updated draft IGA
receives further refinement before taking it back to their respective cities/district.
The board will revisit the updated version of the agreement at an upcoming meeting.
6. Residential Backflow Device Service Pilot Program
Mr. Goodrich briefed the board on a new approach to Tigard's backflow prevention
program.
The COT currently has 4737 residential customers with backflow devices. Most of the
devices are related to irrigation systems. The state requires these devices be tested
annually to ensure they are functioning properly. Tigard's commercial customers are at
100-percent compliance. Over the past few years, there has been a decline in residential
compliance; compliance for residential customers is as follows:
Year Percentage of Residents
in Compliance
2009 72
2010 76 %
2011 60
2012 57
Based on administrative rules reviewed by the IWB and put into place last year, Tigard
has the authority to turn off a person's water should they fail to comply with backflow
testing requirements.
The COT has been monitoring Tualatin Valley Water District's (TVWD's) backflow
program. Under this voluntary program, TVWD hires a third party (or parties) to test
program participants' backflow devices. The testing cost—typically less than the market
price—is added to the participants' water bill. TVWD's program has been successful,
with 75- to 80-percent compliance. TVWD will also test backflow devices of customers
Page 4of6
who did not enroll in the voluntary program; as a penalty, these customers pay a higher
rate for testing.
The COT must get authorization to check private plumbing devices, like backflow
devices, on private property.
COT is starting to formulate a new program, similar to TVWD's program. The COT
may contract with a third party to perform testing. This may result in possible cost
savings that can be passed on to customers. The program would be a voluntary. A
customer may sign up Tigard's program or forego the program and perform his/her own
testing. If customer fails to do either, the COT could either send out the third party
contractor to do the testing or could turn off the customer's water until the device is
tested.
Mr. Koellermeier noted water customers with and without backflow devices are currently
paying for the administrative costs associated with Tigard's backflow prevention
program. He raised the question of whether customers without backflow devices should
be subsidizing program costs for customers who do have the devices. The options are
under review and will be discussed at a later date.
7. Informational Items
■ The winter edition of Know H2O was included in the meeting packet and is on
file in the IWB record.
The board was briefed on Know H2O under agenda item 4. However, it was
noted that staff had provided an old edition of Know H2O in the commissioners'
packets. Ms. Gaston distributed the current winter 2012 edition. This edition is on
file in the IWB record.
8. Non-Agenda Items
Mr. Koellermeier acknowledged confidential correspondence had been provided to the
commissioners in a separate envelope.
Commissioner Henschel requested an update on the Lake Oswego Tigard Water
Partnership's land use application in West Linn.
Mr. Koellermeier reported:
The West Linn Planning Commission (WLPC) denied Lake Oswego/Tigard land use
application for the water treatment plant and pipeline. The basis of their denial is that the
application did not meet code requirement benefit whereby the projects have to provide
some benefit to the West Linn community. Once the Planning Commission's findings
are adopted, Lake Oswego/Tigard will likely file an appeal with the West Linn City
Page 5 of 6
Council (WLCC). Lake Oswego and Tigard expects the appeal to result in a multi-
meeting public hearing.
The partnership enacted a slow down for projects with long lead times. Lake
Oswego/Tigard can delay about $2.5 million in expenditures for about three months
without affecting the overall project schedule. Other alternatives are being considered,
should the \X/LCC deny the appeal.
9. Next Meeting
December 12, 2012, at 5:30 p.m.
Public Works Auditorium, 8777 SW Burnham Street, Tigard, Oregon
10. Adjournment
At 6:55 p.m. Commissioner Henschel moved to adjourn the meeting. Commissioner
Buehner seconded the motion. The meeting adjourned by unanimous vote of the
Commissioners present, with Commissioners Barrett, Buehner, Henschel,Jenke, and
Winn voting yes.
Dick Winn, IWB Chair Greer Gaston, IWB Recorder
Date: Date:
Page 6 of 6
Agenda Item No.:
IWB Meeting Date:
City of Tigard
. , Memorandum
To: Intergovernmental Water Board Members
From: John Goodrich, Utility Manager
Re: Future Water Supply Development for the Tigard Water Service Area
Date: November 29, 2012
The City of Sherwood recently completed the construction of water pipelines and facilities to
convey drinking water supply from the Willamette River Water Treatment Plant (WRWTP) in
Wilsonville to Sherwood's water distribution system. Sherwood oversized segments of the
transmission system with the intent of transferring excess capacity to a regional partner.
As the city develops long-term strategies for 2040 and beyond, we contracted Murray, Smith &
Associates (MSA) to provide a conceptual analysis of the Sherwood-Willamette River project.
Other regional water suppliers have expressed interest in developing regional partnerships in
water transmission capacity from the WRWTP including the City of Hillsboro by 2026.
The purpose of this action was to document conceptual-level analysis of the costs, risks and
benefits in acquiring all or a portion of the City of Sherwood's Portland Supply Line, as part of
a supply and transmission system from the Willamette River compared to an alternative
approach of partnering in a larger transmission project with other regional partners. The
analysis was for maximum capacity of 25 million gallons per day (mgd).
Attached is the technical memorandum provided by MSA regarding the findings of the analysis.
Mr. Brian Ginter, P.E. from MSA is scheduled to provide a short presentation regarding the
technical memo at the next IWB meeting on Wednesday, December 12.
DRAFT
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TECHNICAL MEMORANDUM
DATE: October 12,2012
PROJECT: 12-1362.401
TO: Mr. John Goodrich,Utility Division Manager
City of Tigard
FROM: Brian Ginter, P.E.
Lael Alderman,P.E.
Murray, Smith&Associates, Inc.
RE: City of Tigard Future Water Supply Development Approaches Conceptual
Analysis Findings
Purpose
The purpose of this technical memorandum is to document a conceptual-level analysis of the
relative costs,risks and benefits of the City of Tigard(City) acquiring all or a portion of the City
of Sherwood's Portland Supply Line as part of a supply and transmission system from the
Willamette River compared to an alternative approach of participating in a larger Willamette
River supply and transmission project with other regional partners.
Background
The City has participated in regional planning and long-term water supply, treatment and
transmission studies associated with the development of a regional Willamette River water
supply system originating at the site of the Willamette River Water Treatment Plant(WRWTP)
located in Wilsonville. Numerous studies have been performed by individual water providers
and regional partnerships, such as the Willamette River Water Coalition(WRWC),to define the
type, size, location and cost of such a supply system. A regional partnership provides all
participants in a water supply project the opportunity to benefit from the economies of scale
associated with the design and construction of facilities sized to meet the needs of all the
facility's owners.
The City of Sherwood recently completed the construction of transmission pipeline facilities to
transmit drinking water supply from the WRWTP in Wilsonville to Sherwood's distribution
12-1362.401 Page 1 of 12 Future Water Supply Development
October 2012 Conceptual Analysis
City of Tigard
system. As part of this work, Sherwood oversized segments of the transmission system believing
that the excess capacity could eventually be transferred to a regional partner. Sherwood is also
exploring opportunities to integrate its existing Portland Supply Main into this transmission
system to the benefit of a regional partner and as a means of recovering a portion of the capital
investment. The City of Sherwood's 24-inch diameter ductile iron Portland Supply Main
extends approximately four(4)miles,beginning at the terminus of the southern leg of the
Washington County Supply Line system in the City of Tualatin and connecting to the City of
Sherwood distribution system near the intersection of SW Oregon Street and SW Murdock Road.
The existing main could serve as an element of future transmission facilities to supply water
from the WRWTP in Wilsonville to Tigard.
Water Supply and Transmission Alternatives
Of the 130 million gallons per day(mgd) in the water right permit held by the WRWC for
diversion from the Willamette River at the location of the WRWTP,the City is allocated 25 mgd.
The City will be required to construct new finished water supply and transmission facilities in
order to make use of this 25 mgd allocation. Two(2) alternatives available to the City are
presented and evaluated here. Alternative 1 consists of the City acquiring all or a portion of
Sherwood's Portland Supply Line, as well as capacity in facilities owned by Sherwood and sized
for future partners,and integrating these facilities into a new supply and transmission system
from the Willamette River. Alternative 2 would have the City participating in a larger
Willamette River supply and transmission project with other regional partners. Sizing of
proposed transmission mains are based upon a maximum average velocity in the pipe of five(5)
feet per second at flows equal to stated ultimate capacities.
The alternatives analysis presented herein is based on existing available data and studies. No
new engineering analyses of treatment,transmission routing or project cost estimates were
performed as part of this analysis. For the purposes of normalizing the two (2)alternatives,
existing data was used as the basis for definition of conceptual facilities. Specific sources of data
used in this analysis include the following materials:
• Willamette River Water Supply System Preliminary Engineering Report(Murray, Smith
&Associates, Inc, December 1999);
• Willamette River Water Treatment Plant Master Plan (MWH,December 2006);
• Tualatin Valley Water District, Water Supply Improvements Program, Preliminary
Engineering-Phase I (Carollo Engineers,December 2006);
• Willamette River Water Supply System Potential Transmission Main Alignment
Coordination Evaluation Technical Memorandum (Murray, Smith&Associates, Inc,
January 2011).
Alternative I—Acquire a Portion of the City of Sherwood's Portland Supply Main
Water supply development concept Alternative 1 includes the City purchasing a 25 mgd share in
the capacity of the WRWTP in Wilsonville. The City would also purchase capacity in the
existing transmission piping from the WRWTP to the City of Sherwood. The proposed
Alternative 1 transmission system would be completed by acquiring a section of the Sherwood's
12-1362.401 Page 2 of 12 Future Water Supply Development
October 2012 Conceptual Analysis
City of Tigard
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Portland Supply Main and constructing multiple segments of new transmission piping to supply
25 mgd to Tigard's 10 Million Gallon(MG)Reservoir. A new booster pump station would need
to be constructed to transmit supply to the City's 10 MG Reservoir. Proposed Alternative 1
facilities and transmission piping alignments are illustrated on Figure 1. A summary of the
Alternative 1 water transmission facilities,both existing and proposed, is provided below.
1. Expansion of the WRWTP capacity by 25 mgd for supply to City.
The WRWTP property is divided into a lower and upper site. The upper site remains
undeveloped and is available to site expansions for the facility once the ultimate capacity
of the lower site is realized. The lower site of the WRWTP has an ultimate capacity of
approximately 65 mgd; current construction and operation of the facility provides 15 mgd
to Wilsonville and Sherwood. The City would be responsible for sharing the costs in
any projects which would expand the capacity of the lower site relative to the additional
25 mgd of supply desired. The City would also be responsible for reimbursing WRWTP
partners for a relative share of the initial construction costs for the existing WRWTP
facilities sized for capacity in excess of 15 mgd.
2. The City purchases 25 mgd of capacity in the existing Wilsonville and Sherwood-owned
transmission system from the WRWTP to the intersection of SW Murdock Road& SW
Sunset Boulevard in Sherwood.
The existing transmission system in this portion of the proposed Alternative 1 alignment
is a gravity fed system originating from the WRWTP. The transmission main is a
combination of 63-inch diameter welded steel pipe (from the WRWTP north to the
intersection of SW Kinsman Road and SW Wilsonville Road in Wilsonville)and 48-inch
diameter welded steel pipe(the remaining alignment). The 63-inch diameter section of
main was constructed with a wye connection at its northern end to allow for future
expansion and construction of parallel transmission facilities. The ultimate capacity of
the 63-inch diameter main is 65 mgd. The ultimate capacity of the 48-inch diameter main
is 40 mgd. Ultimate demands for Sherwood and Wilsonville account for 40 mgd of the
transmission system's capacity between the WRWTP and the intersection of SW Tooze
Road& SW Grahams Ferry Road in Clackamas County;parallel transmission facilities
would be required along this portion of the route(as described in Item 3 below).
Additional studies would be required to confirm available capacity and ownership in
supply facilities prior to further advancement of Alternative 1.
3. Construction of parallel transmission facilities to convey supply beyond the 40 mgd
capacity of the existing 48-inch diameter segments of Wilsonville and Sherwood-owned
transmission main.
The City would be required to construct parallel transmission facilities capable of
conveying 25 mgd from the existing wye connection on the 63-inch diameter main at the
intersection of SW Kinsman Road& SW Wilsonville Road to the intersection of SW
Tooze Road and SW Grahams Ferry Road in Clackamas County. Construction of a new
parallel 42-inch diameter transmission main would be required to transmit 25 mgd supply
12-1362.401 Page 3 of 12 Future Water Supply Development
October 2012 Conceptual Analysis
City of Tigard
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for Tigard. The City would need to construct approximately 10,000 lineal feet(LF) of
new transmission main in this area, including a connection to the existing 48-inch
diameter welded steel main. The remaining segments of the existing 48-inch diameter
transmission main north to Sherwood would have adequate capacity to provide for
Tigard's ultimate supply needs. Additional studies would be required to confirm
available capacity supply facilities prior to further advancement of Alternative 1.
4. Construction of new transmission facilities and other associated appurtenances to
transmit supply in SW Murdock Road from Sherwood's supply main at SW Sunset
Boulevard to SW Oregon Street.
The City of Sherwood's 48-inch diameter supply main enters Sherwood from the south
along SW Baker Road/SW Murdock Road,turning west in SW Sunset Boulevard to
continue on to Sherwood's 4.0 MG Sunset Reservoir#2. In order to continue
transmitting WRWTP supply north to Tigard, approximately 4,300 LF of new
transmission main would need to be constructed within SW Murdock Road. A 42-inch
diameter main would be required to meet the ultimate capacity requirement of 25 mgd.
Additionally, a meter vault would need to be constructed in the vicinity of the SW Sunset
Boulevard to monitor flows directed towards Tigard.
5. The City purchases a portion of Sherwood's Portland Supply Main.
The City would need to purchase, at a minimum, approximately 10,000 LF of the existing
24-inch diameter transmission main from the City of Sherwood. The City would require
the section of existing main between the intersection of SW Oregon Street and SW
Murdock Road in Sherwood and a location in the vicinity of the intersection of SW
Herman Road and SW 124th Avenue in the City of Tualatin. The 24-inch main has an
ultimate capacity of approximately 10 mgd.
6. Construction of parallel transmission facilities to transmit capacity beyond the 10 mgd
capacity of Sherwood's Portland Supply Main.
Sherwood's Portland Supply Main is constructed of 24-inch diameter ductile iron pipe.
The ultimate capacity of the existing transmission main is 10 mgd, only a fraction of
Tigard's desired ultimate supply of 25 mgd. Construction of a new parallel 30-inch
diameter transmission main would be required to provide the additional 15 mgd of
necessary supply. The City would need to construct approximately 10,000 LF of new 30-
inch transmission main to parallel the portion of Sherwood's Portland Supply Main
which it would purchase.
7. Construction of transmission facilities and other associated appurtenances to transmit
supply from Sherwood's Portland Supply Main to the City of Tigard, including booster
pumping facilities.
For the general transmission main alignment shown in Figure 1,the City will need to
combine flows from the purchased section of Sherwood's Portland Supply Main with
12-1362.401 Page 4 of 12 Future Water Supply Development
October 2012 Conceptual Analysis
City of Tigard
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flows from the proposed parallel 30-inch diameter line. The two (2)mains would tie
together in the vicinity of the intersection of SW Herman Road and SW 124th Avenue in
the City of Tualatin and be pumped north to Tigard's 10 MG Reservoir. The associated
transmission main would be required to cross under the Tualatin River en route to the
City.
Booster Pump Station --The WRWTP currently operates at an approximate hydraulic
grade(HGL)of less than 450 feet. The City's 10 MG Reservoir overflow elevation is
set at 470 feet. The City would be required to construct a new pump station to boost
the HGL of the WRWTP supply to 470 feet. The ultimate capacity of the proposed
booster pump station would be approximately 25 mgd, or 17,400 gallons per minute
(gpm), which could be constructed in multiple stages to meet growing City demands.
HDD Crossing of Tualatin River--Any proposed transmission main alignment from
Sherwood or Tualatin north to the City would require a crossing of the Tualatin River.
The most likely means for crossing the river would be an underground crossing
through the use of horizontal directional drilling(HDD). Due to the sensitive nature of
the riparian lands, a minimum distance from the river's edge will have to be
maintained and open cut transmission main construction will be prohibited. Large
receiving and boring pits will be required on either end of the construction, and
adequate area will need to be made available for laying out the HDD piping. An
estimated length of 1,000 LF for the HDD crossing has been used in this
memorandum.
Alternative 2—Future Regional Supply Development
Water supply development concept Alternative 2 would have the City participate in a major
regional expansion of the WRWTP, including the facility's River Intake and Raw Water Pump
Station, in Wilsonville. The City would also need to participate in the development of a new
transmission system extending north from the Willamette River to Washington County water
providers north of the City's service area. The proposed regional transmission system is
assumed to follow the most recent alignment presented to the WRWC as part of the Tonquin
Trail investigation.
A proposed regional transmission main is assumed to operate at an HGL higher than the 470 feet
of the Tigard 10 MG Reservoir overflow,thus no booster pumping from the regional
transmission system will be required. Tigard's 10 MG Reservoir would be supplied through new
City-owned transmission piping from a master metered connection to the proposed regional
transmission main. As part of this regional supply system, Tigard would also share in the
development of a regional terminal storage facility north of the City's service area. Proposed
Alternative 2 facilities and transmission piping alignments are illustrated on Figure 2. A
summary of the Alternative 2 water transmission facilities,both existing and proposed, is
provided below.
12-1362.401 Page 6 of 12 Future Water Supply Development
October 2012 Conceptual Analysis
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PROPOSED CITY OF TIGARD TRANSMISSION MAIN
PROPOSED REGIONAL TRANSMISSION MAIN
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EXISTING WILLAMETTE RIVER WTP TRANSMISSION MAIN
EXISTING SHERWOOD 24-INCH TRANSMISSION MAIN
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For the purpose of analysis, supply development costs will be based on Tigard's capacity share
of a 100 mgd supply and transmission system. The ultimate regional supply of 100 mgd is based
upon the findings of the Willamette River Water Treatment Plant Master Plan (MWH, December
2006).
1. Tigard participates in the development of a new transmission system extending north
from the WRWTP to Washington County area water providers located north of the City's
existing service area.
An 84-inch diameter transmission main will be required to transmit the ultimate regional
supply of 100 mgd. Based upon the most recent alignment presented to the WRWC, it
will require approximately 77,500 LF (14.7 miles)of new transmission main to reach the
proposed regional terminal storage reservoir facilities from the expanded WRWTP. No
booster pumping facilities will be required. As with Alternative 1, there will be costs
involved with constructing a HDD, or microtunnel, crossing under the Tualatin River.
Tigard would be responsible for sharing costs in constructing the new transmission
system relative to its 25 mgd share of overall system capacity.
2. Tigard participates in a major expansion of the WRWTP to meet the supply needs of
regional partners.
The lower site of the WRWTP has a build-out capacity of 65 mgd. Current construction
and operation of the facility provides 15 mgd to Wilsonville and Sherwood, leaving 50
mgd of expandable capacity at the lower site. The upper site of the WRWTP has a build-
out capacity of 100 mgd.
Any project to expand the WRWTP to meet demands for a regional partnership would
likely involve TVWD,which has an ultimate demand of 70 mgd. The WRWTP Master
Plan puts forth the likely scenario for expansion of the facility to meet TVWD's ultimate
demands as the full development of the WRWTP upper site in a single construction
project. Additionally,the River Intake&Raw Water Pump Station would likely be
upgraded from its current 70 mgd capacity to its build-out capacity of 165 mgd. Tigard
would be responsible for sharing costs in expanding the WRWTP relative to its 25 mgd
share of overall plant capacity. Also, the City would be responsible for reimbursing
existing WRWTP partners for work completed in initial construction of WRWTP
facilities, including the River Intake and Raw Water Pump Station.
3. Construction of transmission facilities and other associated appurtenances to transmit
supply from a master meter connection along the proposed transmission alignment to the
City's 10 MG Reservoir.
A transmission main supplying regional partners would extend north of the City's system
along its western boundary. The City would need to construct a master meter connection
off of the proposed regional transmission main, as well as a dedicated transmission main
to its 10 MG Reservoir. A 42-inch diameter main would be required to provide the
City's 25 mgd ultimate demand. As shown in Figure 2, a potential route for the City's
12-1362.401 Page 8 of 12 Future Water Supply Development
October 2012 Conceptual Analysis
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transmission main would be east along SW Beef Bend Road and the Tonquin Trail from
the master meter to the 10 MG Reservoir, requiring approximately 7,400 LF of piping.
Project Cost Estimates
Project cost estimates for both of the City's water supply development concept alternatives are
presented as follows. 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 Association for the Advancement of Cost Engineering(AACE) classifies cost
estimates depending on project definition, end usage and other factors. The cost estimates
presented here are considered Class 5, with an end usage being concept screening and expected
accuracy range of-30 percent to+50 percent. All cost estimates are based on an assumed three
(3)percent annual inflation to year 2030 dollars. Estimates for costs to purchase existing
systems are based on replacement cost new in year 2030 dollars established from the
documented project costs. Cost estimating worksheets for Alternative 1 and Alternative 2 are
provided in the Appendix of this report. Where applicable,project estimates include a 45
percent allowance for project engineering, administration and contingency.
Alternative I Project Cost Estimates
Estimated project costs for Alternative 1 have been itemized by major project elements as
follows:
1. Expansion of the WRWTP capacity by 25 mgd for supply to City...................$67,300,000
Assumptions:
• TVWD & City of Wilsonville completed construction of
WRWTP facilities in 2002. Approximate project costs
totaled$ 41.3M.
o $7.5M for Raw Water Intake & Pump Station at 70
mgd capacity.
o $33.8M for the Water Treatment Plant at 15 mgd
capacity, with$15.1 M for facility oversizing.
• Raw Water Intake & Pump Station would require minor
improvements included in WRWTP expansion costs.
• WTP would require expansion of existing facilities by
approximately 3.3 times. Estimated costs for expansion are
based on indexed cost estimates presented in WRWTP
Master Plan.
2. Purchase 25 mgd of capacity in the existing Wilsonville and
Sherwood-owned transmission system from the WRWTP to the
intersection of SW Murdock Road & SW Sunset Boulevard in
Sherwood...... ...................................................................................................$11,800,000
12-1362.401 Page 9 of 12 Future Water Supply Development
October 2012 Conceptual Analysis
City of Tigard
G:\PDX_Projects\I2\1362\401\Memos\Tigard Water Supply Dev Altematives-Tech Memo.doc
Assumptions:
• Existing capacity of 63-inch diameter main in SW Kinsman
Road is 65 mgd. Tigard to reimburse Wilsonville and
Sherwood relative to its desired 25 mgd share of capacity.
• Existing capacity of 48-inch diameter main from SW Tooze
Road to SW Sunset Blvd is 40 mgd. Tigard to reimburse
Sherwood relative to its desired 25 mgd share of capacity.
3. Construction of parallel transmission facilities from the intersection of
SW Kinsman Road& SW Wilsonville Road in Wilsonville to intersection
of SW Tooze Road& SW Grahams Ferry Road in Clackamas County ...........$20,200,000
Assumptions:
• Approximately 10,800 LF of 42-inch diameter main.
4. Construction of new transmission facilities in SW Murdock Road from
Sherwood's supply main at SW Sunset Boulevard to SW Oregon Street...........$9,300,000
Assumptions:
• Approximately 4,300 LF of 42-inch diameter main.
• Includes construction of new metering facility to monitor
flows to Tigard.
5. Purchase portion of Sherwood's Portland Supply Main .....................................$9,600,000
Assumptions:
• City of Sherwood constructed pipeline in 1999 for
approximately$9 million in total project costs.
• Tigard would purchase approximately 10,000 LF of the total
4 mile pipeline.
6. Construction of new transmission facilities parallel to
Sherwood's Portland Supply Main....................................................................$13,400,000
Assumptions:
• Approximately 10,000 LF of 30-inch diameter main.
7. Construction of new transmission facilities from Sherwood's Portland
Supply Main to the City of Tigard, including booster pumping facilities.........$39,000,000
Assumptions:
• Approximately 16,100 LF of 42-inch diameter main,
including approximately 1,000 LF of HDD crossing under
the Tualatin River.
• Pumping facilities sized for 25 mgd(17,400 gpm) capacity to
boost head 90 to 120 feet.
Estimated Total Project Costs for Alternative 1, Year 2030 Dollars.........................$170,600,000
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Alternative 2 Project Cost Estimates
Estimated project costs for Alternative 2 have been itemized by major project elements as
follows:
1. Participation in the development of a new regional transmission system.......$241,100,000
Assumptions:
• Estimated project costs based upon Tualatin Valley Water
District, Water Supply Improvements Program, Preliminary
Engineering-Phase I (Carollo Engineers, December 2006).
o Costs provided in Table 2,Pipeline Conceptual Cost
Estimates. Alternative Alignment, Constrained Case
Cost of$475M for 84-inch diameter main was used as
basis of estimate. Lengths of transmission main and
associated complexities in construction from reporting
are similar to proposed work shown in Figure 2.
• Additional costs for City's share in approximately 60 MG of
terminal storage for transmission system.
2. Participation in a major expansion of the WRWTP to meet supply
needs of regional partners................................................................................$115,300,000
Assumptions:
• Expansion of WRWTP assumed to be build-out construction
of upper WRWTP site in a single construction project for
additional water treatment facilities.
o Upper site ultimate capacity is 100 mgd.
o Per mgd cost calculated using WRWTP Master Plan,
Table 5-6, Alternative 1 for 70 mgd upper site
expansion cost of$107M.
• Expansion of River Intake&Raw Water Pump Station
required.
o Existing capacity is 70 mgd. Estimates assume
expansion to WRWTP build-out capacity, 165 mgd.
• City is responsible for reimbursing existing partners for cost
associated with initial construction of River Intake&Raw
Water PS facilities.
3. Construction of new City-owned transmission facilities from a master
meter connection along the proposed regional transmission system to
City's 10 MG Reservoir ..................................................................................$15,000,000
Assumptions:
• Approximately 7,400 LF of 42-inch diameter main.
Estimated Total Project Costs for Alternative 2, Year 2030 Dollars.........................$371,400,000
12-1362.401 Page 11 of 12 Future Water Supply Development
October 2012 Conceptual Analysis
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Summary
This technical memorandum is to intended to document a conceptual-level analysis of the costs,
risks and benefits associated with the City acquiring all or a portion of the City of Sherwood's
Portland Supply Line as part of a supply and transmission system from the Willamette River
compared to an alternative approach of participating in a larger Willamette River supply and
transmission project with other regional partners. With City input and following discussions
with Sherwood and other regional water providers,the preliminary concepts presented here may
be advanced for the purpose of long-term water supply planning, discussions with neighboring
water providers and participation in regional supply planning efforts.
BMG/LLA:Ila
12-1362.401 Page 12 of 12 Future Water Supply Development
October 2012 Conceptual Analysis
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APPENDIX
Project Cost Estimate Worksheets
ALTERNATIVE 1--ESTIMATED PROJECT COSTS
Item k
1A Location: Portion of cast to construct existing River Intake facilities&WTP
Approx.Total Project Cost,Year 2002 Dollars: $ 41,300,000
Raw Water Intake&Pump Sta.Total: $7,500,000
Current Capacity,mgd: 70
Water Treatment Plant Total: $33,800,000
Cost for Oversized Facilities: $15,100,000
Current Max Capacity(w/oversized
facilities),mgd: 70
Tigard's Share for Intake/PS Oversizing Costs,Yr 2002 Dollars: $ 2,700,000
Proposed Share of Capacity,mgd: 25
Proposed%age of Capacity,mgd: 35.7%
Tigard's Share for WTP Oversizing Costs,Year 2002 Dollars: $ 5,400,000
Proposed Capacity,mgd: 25
Proposed%age of Capacity,mgd: 35.7%
Sharable Cost Based Upon Capacity,Year 2002: $ 8,100,000
Sharable Cost Based Upon Capacity,Oct 2012: $ 10,088,319
ENR,CCI,Oct 2012: 9418.23
ENR,CCI,2002: 7561.98
%Change: 24.5%
Estimated Project Total,Year 2030: $ 17,174,687
assumed annual inflation rate: 3%
1B Location: Portion of cost for expansion of WRWTP from 15 to 65 mgd
No additional cost associated with expansion of Raw Water Intake&Pump Station.
Construction Cost for Expanding Water Treatment Plant Element
by 50 mgd @ Lower Site,Yr 2006(WRWTP MP): $ 54,000,000
Approx.Costs,Oct 2012: $ 58,859,986
ENR,CCI,Oct 2012: 9418.23
ENR,CCI,Dec 2006: 8640.58
%Change: 9.0%
Iigard's Share in Costs for Expanding WTP,Oct 2012: $ 29,429,993
Tigard's Proposed Add'I Capacity,mgd: 25
Added WTP Capacity,mgd: 50
Proposed%age of Capacity,mgd: 50.0%
Estimated Project Total,Year 2030: $ 50,102,593
assumed annual inflation rate: 3%
G:\PDX_Projects\12\1362\401\Spreadsheets\Cost Estimates\Piping Costs per Segment 10-2-12.xls
ALTERNATIVE 1--ESTIMATED PROJECT COSTS
2A Location: Portion of cost for 15 mgd of capacity in existing 63-inch dia.WTP P/Line
Segment 1
Approx.Total Project Cost,Year 2002 Dollars: $ 2,900,000
Total Capacity of 63-inch Dia.Line: 65 mgd
Tigard's Proposed Purchase: 25 mgd
Tigard's Proposed%age of Total Capacity: 38.5%
Sharable Cost Based Upon Capacity,Year 2002: $ 1,115,385
Sharable Cost Based Upon Capacity,Oct 2012: $ 1,389,180
ENR,CCI,Oct 2012: 9418.23
ENR,CCI,2002: 7561.98
%Change: 24.5%
Estimated Project Total,Year 2030: 1$ 2,364,985
assumed annual inflation rate: 3%
2B Location: Portion of cost for 15 mgd of capacity in existing 48-inch dia.Swood P/Line
Segments 7-8
Total Project Cost,July 2009-Dec 2011: $ 9,166,778
%of Une Length to be Shared with Tigard: 88.2%
Total Length,LF: 15,424
Shared Length,LF: 17,490
Sharable Cost,Dec 2011: $ 8,083,956
Total Capacity: 40 mgd
Tigard's Proposed Purchase: 25 mgd
Tigard's Proposed%age of Total Capacity: 62.5%
Sharable Cost Based Upon Capacity,Year 2011: $ 5,052,472
Sharable Cost Based Upon Capacity,Oct 2012: $ 5,498,323
ENR,CCI,Oct 2012: 9418.23
ENR,CCI,Jul 2009: 8654.52
%Change: 8.8%
Estimated Project Total,Year 2030: $ 9,360,527
assumed annual inflation rate: 3%
3 Location: New transmission system parallel to Segments 1-6 of Swood P/Line
Approx.Length: 10,800 LF
Dia: 421N
Cost per Inch diameter lineal foot: $18
Total Est.Construction Cost,Year 2012: $ 8,164,800
+45%Enginerring,Admin&Contingency: $ 3,674,160
Estimated Project Total,Year 2012: $ 11,838,960
Estimated Project Total,Year 2030: $ 20,1557037
assumed annual inflation rate: 3%
G:\PDX_Pmiects\12\1362\401\Spreadsheets\Cost Estimates\Piping Costs per Segment 10-2-12.xis
ALTERNATIVE 1--ESTIMATED PROJECT COSTS
4 Location: Murdock Road,between Baker Rd/Sunset Blvd&Oregon Str roundabout
Approx.Length: 4,300 LF
Dia: 42 IN
Cost per Inch diameter lineal foot: $18
Est.Construction Cost P/line,Year 2012: $ 3,250,800
Plus Metering Vault @ SW Sunset Blvd:
Est.Construction Cost,Year 2012: $ 500,000
Estimated Construction Cost,Year 2012: $ 3,750,800
+45%Enginerring,Admin&Contingency: $ 1,687,860
Estimated Project Total,Year 2012: $ 5,438,660
Estimated Project Total,Year 2030: $ 9,258,955
assumed annual inflation rate: 3%
5 Location: Cost to Purchase Sherwood 24-inch dia P/Line from Tualatin
Original Project Cost,1999: $ 9,000,000
Approx.Length of P/Line,LF: 21,120
Tigard's Share of Original Project Cost,1999: $ 4,261,364
Portion Tigard Purchases,LF: 10,000
%of Original Cost Tigard Purchases: 47.3%
Adjusted Project Cost,Oct 2012: $ 5,623,308
ENR,CCI,Oct 2012: 9418.23
ENR,CCI,1999: 7137.17
%Change: 32.0%
Estimated Project Total,Year 2030: $ 9,573,305
assumed annual inflation rate: 3%
6 Location: Line parallel to Sherwood's PSL between Oregon Str roundabout&SW 124th Ave/SW Herman Rd,Tualatin
Approx.Length: 10,000 LF
Dia: 30 IN
Cost per Inch diameter lineal foot: $18
Estimated Construction Cost,Year 2012: $ 5,400,000
+45%Enginerring,Admin&Contingency: $ 2,430,000
Estimated Project Total,Year 2012: $ 7,830,000
Estimated Project Total,Year 2030: $ 13,330,051
assumed annual inflation rate: 3%
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ALTERNATIVE 1--ESTIMATED PROJECT COSTS
7A Location: SW 124th Ave,North acorss Tualatin River to SIN Beef Bend Rd,10 MG Res site
Approx.Length: 15,100 LF
Dia: 42 IN
Cost per Inch diameter lineal foot: $18
Estimated Cost of P/Line,2012: $11,415,600
Plus Horiz Dir.Drill of Tualatin River
Approx.Length: 1,000 LF
Dia: 42 IN
Cost per Inch diameter lineal foot for HDD: $30
Estimated Cost of HDD,2012: $1,260,000
Estimated Construction Cost,Year 2012: $12,675,600
+45%Enginerring,Admin&Contingency: $ 5,704,020
Estimated Project Total,Year 2012: $ 18,379,620
Estimated Project Total,Year 2030: $ 31,290,073
assumed annual inflation rate: 3%
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7B Location: Booster Pump Station
Capacity: 25 mgd
17,360 gpm
Req'd Pumping Head: 90 ft
Assumed Pump Effic.: 80%
Firm Horsepower Req'd: 620
Estimated Cost per Horsepower,Installed: $5,000
Estimated Construction Cost,Year 2012: $ 3,100,000
+45%Enginerring,Admin&Contingency: $ 1,395,000
Estimated Project Total,Year 2012: $ 4,495,000
Estimated Project Total,Year 2030: $ 7,652,437
assumed annual inflation rate: 3%
Estimated Alternative 1 Total,Year 2012: $ 100,011,362
Estimated Alternative 1 Total,Year 2030: $ 170,262,649
Footnote:
1.This project cost estimate is an opinion of cost based on information available at the time of the estimate. Final costs
will depend on actual field conditions,actual material and labor costs,market conditions for construction,regulatory
factors,final project scope,method of implementation,schedule and other variables.The Engineering(ENR)
Construction Cost Index for Seattle,Washington is 9418.23,October 2012.
G:\PDx_Pmjects\12\1362\401\Spreadsheets\Cost Estimates\Piping Casts per Segment 10-2-12.xis
ALTERNATIVE 2--ESTIMATED PROJECT COSTS
Item#
1A Location: Portion of cost for constructing Regional Transmission Main
84"Diameter,100 mgd capacity
Estimated Total Project Cost,December 2006: $ 317,000,000
*minus contigencies
Total Capacity: 100 mgd
Tigard's Share of Total Capacity: 25 mgd
Tigard's %age of Total Capacity: 25.0%
Sharable Cost Based Upon Capacity,Dec 2006: $ 79,250,000
Sharable Cost Based Upon Capacity,Oct 2012: $ 86,382,480
ENR,CCI,Oct 2012: 9418.23
ENR,CCI,Dec 2006: 8640.58
%Change: 9.0%
+45%Enginerring,Admin&Contingency: $ 38,872,116
Estimated Project Total,Year 2012: $ 125,254,596
Estimated Project Total,Year 2030: $ 213,237,565
assumed annual inflation rate: 3%
1B Location: Portion of cost to construct terminal reservoirs for Regional Transmission Main
Capacity: 60 MG
Estimated Cost per gallon: $0.75
Estimated Construction Cost,Year 2012: $ 45,000,000
Total Capacity of Transmission Main: 100 mgd
Tigard's Share of Total Capacity: 25 mgd
Tigard's Proposed%age of Total Capacity: 25.0%
Sharable Cost Based Upon Capacity,Oct 2012: $ 11,250,000
+45%Enginerring,Admin&Contingency: $ 5,062,500
Estimated Project Total,Year 2012: $ 16,312,500
Estimated Project Total,Year 2030: $ 27,770,939
assumed annual inflation rate: 3%
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ALTERNATIVE 2--ESTIMATED PROJECT COSTS
2A Location: Portion of cost to expand WTP to upper site,
25 mgd of total 100 mgd capacity
Construction Cost for Expansion of Water Treatment Plant
by 70 mgd @ Upper Site,Yr 2006(WRWTP MP): $ 107,000,000
Approx.Costs,Oct 2012: $ 116,629,973
ENR,CCI,Oct 2012: 9418.23
ENR,CCI,Dec 2006: 8640.58
%Change: 9.0%
Approx.Cost per mgd,Oct 2012: $ 1,666,142
Est.Construction Cost for Upper Site Build-Out Capacity,Year
2012: $166,614,247
Proposed Capacity,mgd: 100
Tigard's Share in Costs for Expanding WTP,Oct 2012: $41,653,562
Proposed Share in Capacity,mgd:25
+45%Enginerring,Admin&Contingency: $ 18,744,103
Estimated Project Total,Year 2012: $60,397,664
Estimated Project Total,Year 2030: $ 102,822,981
assumed annual inflation rate: 3%
2B Location: Portion of cost for expansion of WRWTP River Intake from current 70 mgd to 165 mgd
Approx.Construction Cost for WRWTP River Intake&PS
Element,Year 2002: $ 7,500,000
Tigard's Share for Intake/PS Cost,Year 2002 Dollars: $ 2,700,000
Capacity Yr 2002,mgd: 70
Proposed Share of Capacity,mgd: 25
Proposed%age of Capacity,mgd: 35.7%
Approx.Share in Costs for Original Constr.,Oct 2012: $ 3,362,773
ENR,CCI,Oct 2012: 9418.23
ENR,CCI,2002: 7561.98
%Change: 24.5%
Est.Construction Cost for Build-Out Capacity,Year 2012: $ 11,000,000
"based upon Yr 2002 construction costs
Current Capacity,mgd: 70
Proposed Capacity,mgd: 165
Added Capacity to Facility: 135.7%
Tigard's Share for Intake/PS Cost,Year 2012: $ 1,700,000
Ultimate Capacity,mgd: 165
Proposed Share of Capacity,mgd: 25
Proposed%age of Capacity,mgd: 15.2%
Tigard's Total Share in Costs for Expanding River Intake
Facilities,Oct 2012: $ 5,062,773
+45%Enginerring,Admin&Contingency: $ 2,278,248
Estimated Project Total,Year 2012: $ 7,341,021
Estimated Project Total,Year 2030: $ 12,497,596
assumed annual inflation rate: 3%
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ALTERNATIVE 2--ESTIMATED PROJECT COSTS
3 Location: Cost to construct main from Regional Transmission Main to 10 MG Reservoir
Approx.Length: 7,400 LF
Dia: 42 IN
Cost per Inch diameter lineal foot: $18
Est.Construction Cost P/line,Year 2012: $ 5,594,400
Plus Metering Vault @ Regional Transmission Main:
Est.Construction Cost,Year 2012: $ 500,000
Total Est.Construction Cost,Year 2012: $ 6,094,400
+45%Enginerring,Admin&Contingency: $ 2,742,480
Estimated Project Total,Year 2012: $ 8,836,880
Estimated Project Total,Year 2030: $ 15,044,197
assumed annual inflation rate: 3%
Estimated Alternative 2 Total,Year 2012: $ 218,142,661
Estimated Alternative 2 Total,Year 2030: $ 371,373,278
Footnote:
1.This project cost estimate is an opinion of cost based on information available at the time of the estimate. Final
costs will depend on actual field conditions,actual material and labor costs,market conditions for construction,
regulatory factors,final project scope,method of implementation,schedule and other variables. The Engineering
(ENR)Construction Cost Index for Seattle,Washington is 9418.23,October 2012.
G:\PDX_Projects\12\1362\401\Spreadsheets\Cost Estimates\Piping Casts per Segment 10-2-12.xls
Intergovernmental Water Board (IWB) Minutes
SERVING TIGARD,KING CITY,DURHAM AND TIGARD WATER DISTRICT
MEETING DATE: Wednesday, December 12, 2012, 5:30 p.m.
MEETING LOCATION: Tigard Public Works Building
8777 SW Burnham Street
Tigard, OR 97223
Members Present:
Gretchen Buchner Representing the City of Tigard
Ken Henschel Representing the Tigard Water District
Keith Jehnke Representing the City of Durham
Andrew Barrett Member-At-Large
Members Absent:
Dick Winn Representing the City of King City
City of Tigard Staff Present:
Dennis Koellermeier Public Works Director
.John Goodrich Utility Division Manager
Kristie Peerman IWB Recorder
1. Call to Order, Roll Call and Introductions
Commissioner Buchner called the meeting to order at 5:33 p.m.
2. Approval of Minutes —November 14, 2012
Commissioner Henschel moved to approve the November 14, 2012, minutes.
Commissioner Barrett seconded the motion. The motion passed by unanimous vote of
the commissioners present,with Commissioners Barrett, Buehner, Henschel, and Jehnke
voting yes.
3. Public Comments
There were no comments from the public.
4. Water Supply Update
Mr. Goodrich reported:
■ Average water use for the month of November was 4.11 million gallons per day
(mgd). This amount was slightly above November 2011 water use.
■ Injection into aquifer storage and recovery (ASR) #2 is accruing at a rate of about
1000 gallons per minute. To date ASR#2 has approximately 15 million gallons of
water stored. Once ASR#2 has reached its targeted storage goal of 200-250
million gallons, the City of Tigard (COT) will begin injecting into ASR#1.
■ ASR#3 is in design. Construction will begin in fiscal year 2014.
5. City of Tigard Future Water Supply Development—Dennis Koellermeier
NIr. Koellermeier reported:
o The City of Sherwood recently completed the construction of water pipelines
and facilities from the Willamette River'Treatment Plant in Wilsonville to
Sherwood's water distribution system.
■ In order to evaluate future Willamette River water supply scenarios for the
Tigard Water Service Area, Tigard contracted with Murray, Smith & Associates
(NIS. ). MSA provided a conceptual analysis of the following scenarios:
i- Supply development in partnership with Wilsonville and Sherwood.
y Major regional supply development with partners.
Brian Ginter, P.E., Murray Smith &Associates, Inc. gave a PowerPoint presentation
titled the huture Water Supply Development Concept Analysis. The presentation is on
file in the IWB record.
Presentation highlights:
■ Mr. Ginter discussed the two scenarios. Both would:
Y Connect the Willamette River supply to Tigard's 10-Million-Gallon
Reservoir.
y Deliver 25 mgd to the COT in the year 2030.
■ Scenario 1-Supply Development in Partnership with Wilsonville and Sherwood.
Tigard may participate in the expansion of existing infrastructure and
buy into excess capacity when available.
Existing infrastructure was built in good economic times, and there is a
firm number on the cost, so the potential buy in would be lower than
scenario 2.
Total Estimated Project Cost,Year 2030 Dollars - $170.6 million
■ Scenario 2-Major Regional Supply Development with Partners.
y Costs and elements will vary depending on the number of regional
partners.
Infrastructure is not constructed and is still at the conceptual stage.
Y Significant transmission costs can be anticipated.
r� Willamette River Water Treatment Plant expansion would require
construction of a new facility running parallel to existing treatment
plant.
Potential partners are Sherwood, Wilsonville, Hillsboro, Tualatin and
Tualatin Valley Water District (TVWD).
Total Estimated Project Cost, Year 2030 Dollars - $371.4 million
■ Mr. Ginter discussed the different phasing options of the two scenarios.
Mr. Koellermeier stated the Lake Oswego partnership is projecting a total project cost of
$230 million in 2016 dollars. Tigard will likely be responsible for a little more than 50
percent of this cost.
The board discussed Tigard's Charter. It requires Tigard voters to approve the
Willamette River supply before it can be used as a drinking water source for Tigard
citizens.
Mr. Koellermeier stated:
■ The PowerPoint presentation was for informational purposes.
■ The Sherwood/Wilsonville partnership is the most economical scenario.
■ COT will likely need to decide whether to pursue the Sherwood/Wilsonville
partnership within the next 18 months. r� financial commitment (of
approximately $5 or $6 million) would be required if Tigard moves forward with
this scenario.
• Currently COT has no legal obligation to participate in the
Sherwood/Wilsonville partnership.
6. Briefing on the November 21, 2012, Boil Water Advisory—John Goodrich
Mr. Goodrich reported:
Monday, The COT collected routine water samples.
November 19, 2012
Tuesday, Water sample results tested positive for:
November 20, 2012 ■ E-coli bacteria and total coliform at a Durham location.
■ Total coliform at a different location off 121 sr and Walnut.
Second samples were taken at the same locations.
Wednesday, Second sample results were positive for both e-coli and total
November 21, 2012 coliform at the Durham location.
The COT issued a boil water advisory at approximately 9 a.m.
Crews were sent to Durham to collect additional samples and
flush the water system.
Tigard staff notified IWB members, Tigard city council and
executive staff.
The COT activated its CodeRed emergency notification system.
The system alerted 86 percent of its contacts in the first hour and
reached 92 percent of all contacts during the day.
Tigard staff received 200 phone calls from water customers within
the first hour of the boil water advisory and a total of 220-230 by
the end of the day.
Thursday, Water samples were negative for e-coli bacteria and total coliform.
November 22, 2012
The boil water advisory was lifted. A message—lifting the boil
water advisory—was issued via the CodeRed system.
Tigard staff was available for incoming phone calls on
Thanksgiving Day.
■ The City of Portland found no bacterial contamination in its water system.
■ On Monday, November 26, 2012, a debriefing of Tigard staff and boil water
advisory, data was provided to 'Tigard executive staff.
Mr. Koellermeier noted that Washington County Health Department is responsible for
notifying restaurants. Also, frequently asked questions (FAQs) are available on the COT
website.
7. Informational Items
Lake Oswego/Tigard Water Partnership Update:
■ Commissioner Henschel requested an update on the Lake Oswego/Tigard Water
Partnership land use application.
➢ Mr. Koellermeier reported the COT had officially filed a notice of
appeal to West Linn City Council. Commissioner Henschel stated that
Tigard Water District would be available to testify during the appeal if
needed.
Water Charges Discussion:
■ Commissioner Henschel questioned the water meter size criteria.
Mr. Goodrich provided a brief discussion regarding fixture counts and
how they determine meter size.
■ Commissioner Buehner questioned the booster charge and the number of
customers effected with the booster charge.
Mr. Goodrich provided information on the charge and stated less than
10 percent of customers are affected. He added the COT has provided
6 million gallons of water for additional fire protection service to those
customers.
CodeRed Flyer Request:
• Commissioner Henschel requested the COT put together an informational flyer
on the CodeRed system. A commissioner on the Tigard Water District board is
the owner of multi-family unit complexes in Tigard and would like to include the
CodeRed flyer in his new tenant informational packet.
8. Non-Agenda Items
The board did not discuss any non-agenda items.
9. Next meeting
_January 9, 2013, at 5:30 p.m.
Public Works uditorium, 8777 SW Burnham Street, Tigard, Oregon
10. Adjournment
Mkt 6:50 p.m. Commissioner Buehner moved to adjourn the meeting. Commissioner
Henschel seconded the motion. The meeting adjourned by unanimous vote of the
Commissioners present, with Commissioners Barrett, Buehner, Henschel, and Jenke
voting yes.
yle-1'41
Dick Winn, IWB Chair Kristie Peerman, I WB Recorder
Date: ���-3�� -3 Date: zA S/f13
Intergovernmental Water Board
Tigard, King City, Durham and Tigard Water District
FUTURE WATER SUPPLY
DEVELOPMENT CONCEPT
ANALYSIS
y
y'
■ Purpose
■ Scenarios development and analysis
■ Findings
■ Other considerations
■ Q&A
z
All
■ Assess opportunities for future development
of Willamette River water right allocation
■ Summarize alternative approaches
■ Compare the relative project costs
■ Illustrate future supply development elements
3
dp
Two primary development approaches
• Partnership with Sherwood/Wilsonville
• Future regional supply development partners
■ Normalized scenarios and timelines
• 25-mgd water right allocation
• 2030 dollars
4
City of
Tigard
TIGARD 10 MG Scenario
RESERVOIR
OE:470 FT ""
City of
._...m..,, ..
King Cdy
a ,
P
SED -`1 C
TUALATIN RIVER City of
tuuluun Rhsr CROSSING Durham,. VtE T� ...' ., 4
_ a
City of
_.. .` I ; \ Tualatin
\..PROPOSED
' CITYOI„JIGARD
PUMP BTAnON
City of T (T0 10 MG RESERVOIR) supply Upply
Sherwood "g
P
TO F O
CITY SHERWOOD �
ITY RUNRN y g d eve l o p m e n t
- PROPOSED
TIGARD METER '.. in partnership wit
VAULT
T
S CITY OF ERORD 1
UNSEI RESERVOIR I -
d,J-._I
--�I Wilsonville and
Sherwood (WRWC)
EXISTING
SHERWOOD
REVENUE METER
VAULT O
6fl'
Cityof
WilsonviVi
lle
a
N 4
3.000 0 3,000
SCALE IN FEET WILLAMETTE RIVER
WATER TREATMENT
LEGEND PLANT
E%ISTINGWLLAMETTE RIVER WTP TRANSMISSION MAIN
EXISTING SHERWOOD 24-INCH TRANSMISSION MAIN
PROPOSED CITY OF TIGARD TRANSMISSION MAIN ,
5
City of
Tigard
TIGARD 10 MG t
RESERVOIR
OE:470 FT
City of
King Crty
PROPOSLU
TUALATIN RIVER �. City Of
n. CROSSING 'I,DUO-,
a�
t,
I
-; City of
Tualatin
l CITYOFTIGA RD
PUMP STATION
City of -(TO 10 MG RESERVOIR)
Sherwood 4 I.
TO CITY OF SHER HOOD ` {
1
DISTRIBUTION < <�"
1
-PROPOGED
TIGARD METER
TO CITY OFSHEI-OOD i VAULT
SUNSEr RESERVOIR i I '
i
j
I 7 x T
EXISTING
SHERWOOD
REVENUE METER
VAULT
Cloy of
Wilsonville
N ,
1 COD 0 3.000 Expansion. •
SCALE IN FEET WI I TTE RIVER
TER TREATMENT
LEGEND PLANT $67.3
FwSTINGWLLAJI RIVER WTP TRANSMISSION MAIN
t:.STING SHERWOOD 24-INCH TRANSMISSION MAIN
t-ROPOSED CITY OF TIGARD TRANSMISSION MAIN -
6
City of
'. Tigard
TIGARD 10 MG
RESERVOIR
OE:47OFT 8 "'
City of !i
King City y rrJ
r
5
7
PROPOSED
TUALATIN RIVER r City Of
Tualmfn Rh'M
CROSSING Durham"
,"
h •1. SECt10�DWPtga U. .> �r 1 �,��•
1
City of
�`• i- I I Tualatin
. . _.._.• .�' � PROPOSED
CITY OF,TIGARL`
PUMP STATION
City of JO 10 MG RESERVOIR)
Sherwood
TO CITY OF SHED ,
-�^•..�� DISTRNWTION �
r j PROPOSED
T16AftD METER L'-
TO
.. J
VAULT
T SUNS TREOF SERVOIR k--
SUNSETRESERVOIR �
Purchase
i
• ' _. Transmission r •
city$11 .8 M
i
{ EXISTING
SHERWOOD
I REVENUE METER
VAULT
City of
" Wilsonville
N
300C 03 000
Expansion
SCALE IN FEET WILT TTE RIVER
TERTREATMENT $67
LEGEND
PLANT
E t1511,YG W LLAMETTE RIVER WTP TRANSMISSION MAIN
Ek STING SHERWOOD 24-INCH TRANSMISSION MAIN _
PROPOSED CITY OF TIGAROTRANSMISSION MAIN
City of
Tigard
TIGARD 10 MG
RESERVOIR
OE:410 FT
City of
King City
t
= i -PROPOSED *• _ City Of`,,
TUALATIN RIVER DUFhamr•.>
TNalulin IN'- CROSSING
t Lc�
10
City of
Tualatin
'y.... _ ,.:PROPOSED .
{L CITY OFa1T16ARD i
PUMP STATION i
(TO 10 MG RESERVOIR)
City of .....
Sherwood
TO CITY OF 6HERW000 4
DIs rRleurloN Cj : r f
ti „CCS �
r., PROPOSED
_ TIGARD METER
VAULT
TO CRY OF 3NERWOOD ._
SUNSET RESERVOMi
TransmissionPurchase Excess
Capacity
$11 .8
•
rallel
EXISTING
SHERWOOD Transmission
REVENUE METER
VAULT Q
$20
City of
` Wilsonville
N\\1 Expansion
3 OOC 0 3 000
SVA TTA RIVER
SCALE IN FEET $67.3
TERTREATMENT
PLANT
tLE- -
Y,
NG WILAMETTE RIVER WTPTRANSMISSION MAINNG SHERWOOD 21-INCH TRANSMISSION MAIN
SED CITY OF TIGARD TRANSMISSION MAIN
City of
Tigard
TIGARD 10MG
RESERVOIR
OE:470 FT
`
City of
King City
I f
° PROPOSED 71.
TUALATIN RIVER City r ,
7 Matin Fhe� CROSSING Du rhamr„�
0.NP 24.
Ctx,,..,..
_v
1
O
�. SO PC
City of
Tualatin
I �
PROPOSED
CITY OF�TIGARD .
PUMP STATION
` (TO 10 MG RESERVOIR)
City of ..-----. Transmission • •
Sherwood !? i New
TOGTYOFSHER D I
DISTRIBUTION }-� B
F $9.3
PROPOSED
-'i TIGARD METER •_... .,
VAULT
iO GI iv 045HERWWD � k-"
'UNSET RESGNVOIN I <t.,. I]
Purchase
Transmission I •
I
l I
$11 .8
Construct • •
llel
EXISTING
S14ERWOOD
REVENUE METER Transmission
VAULT ()
$20.2
C,ty of
\ - 4Vlis onviNe
N\\1
JV
3 000 0 3 000 ExpansionWRWTP
SC�
SCALE IN FEET TTA RIVER
. TER TREATMENT $67.3
LEGEND PLANT
EXISTING WLLAMETTE RIVER WTP TRANSMISSION MAIN
EXISTING SHERMOD 24-INCH TRANSMISSION MAIN "--
PROPOSED CITY OF TIGARD TRANSMISSION MAIN
9
City of
Tigard
TIGARD 10 MG
RESERVOIR
OE:610 FT
City.Of ~;•.•�-. r
......... King City
S
PROPOSED -- City OfTUALATI \
&.1'in.IN— CROSSIN RIVER
CROSSING DuFhenir,,' :
a'WE 24•
SNS 9E EQOH�,0 7 � - Acquire • •
o
PE
/ •
in
4 v
City of
Tualatin -...... $9.6
'1—
PROPOSED
ly CITYOF.TIOARD ,
PUMP STATION
City of (TO 10 Md'RESERVOIRI
e
Transmission Piping
1D arr of snERwuDu g
msl RlNu noN -
PROPOSED $9.3 M
. TIGARD METER
VAULT
T
SUNSESUN OfSNER—
TRESERYON2
Purchase
Transmission I •
$11 .8
Construct Parallel
EXISTING
SNERWOOD
REVENUE METER Transmission
VAULT
$20.2 M
Crty of
Wilsonville
N
a 000 0 3000WRWTP Expansion
SCALE IN FEET VVI I TTE RIVER
TER TREATMENT
LEGEND PLANT
$67.3 M
EXISTING WLLAMETTE RIVER WTPTRANSMIESION
— EXISiINGSNERY 0021-INCNTRANSMISSIONMAIN 4
— PROPOSEDCITYOI 11G 110 TRANSMISSION MAIN
1'
10
City of
TlIp,d
J
i
nGARDIO MG }�
RESERVOIR i.. Construct
or
470 FT , ',1y' Parallel
City,OfKing City 1,f i Transmission
1
$13.4
1 i
- -'
PROPOSED 1
TUALATIN RI City Of
Tuulu1111 IN— CROSSIN Durham..
s
N
Acquire Sherwood
.I
e
int • r
` o
City of
Tualatin
$9.6
� 6
.._PROPOSED �f '-
... CITYO%P!3ARD f r
PUMP STATION
J` City Of (TO 10 MG RESERVOIR)
_ .
Sherwood TransmissionNew , •
TO CITY OF SHERwOOD y f 'w
S
4
$9.3
PROPOSED
TIGARD METER
.- T CITY OF ER
VAULT
SMUT RESERVOIRPurchase Excess
i_ IGS
Transmission • • •
$11 .8 M
Construct r •
llel
EXISTING
% SHERWOOD
REVENUE METER Transmission
VAULT O
of $20.2 M
'„n... City
Wilsonville
N ,
3.000 0 0.000 .. iWRWTP Expansion
SCALE IN FEET WI I TTE RIVER
-- .% TER TREATMENT
LEGEND / PLANT $67.3
EXISTING WLLAMETTE RIVER WTP TRANSMISSION MAIN
E%ISTiNG SHERY DOD2HNCMTRANSMISSION MAIN
- PROPOSEDGTYOFTIGARDTRANSMISSIONMAIN - „`
° 11
City of
Tigard
I 1
• OIR Construct • •
llelT
City of • •
King City
$13.4I i
— a
- •PROPOSED
1 , TUALATIN RIVE City of
DurhamCROSSING
N G
pON ,NPt EAS
1 SEG wOOD
Acquire Sherwood
tN t gNE
l Dia. •
r-� City of
Tualatin
'•rx i '�
$9.6
.-i.:',"--PROPOSED �.
11 GTY OE,TIGARO
j PUMP STATION
ty ctf (TO10MGRESERVOIR)
Sherwood - -
1D Gliv UI SNFHWWD ` _ Transmission
• • •
$9.3 Mt
r PROPOSED _
' TIGARD METER .-
VAULT
TO CITU OF SNERWOOD
SUNSE-SEN-
•
se Excess
Transmission • / •
$11 .8
Construct Parallel
EXISTING
SHERWOOD
REVENUE METER Transmission
VAULT 0
$20.2 M
City of
. wilsonville
N
J coo D 3.000 Expansion
SCALE IN FEET Wt ETTE RIVER
TER' TREATMENT $67.3
LEGEND PLANT
E
ExISTING WILlPA1ETTE RIVER WTP TRANSMISSION MAIN
AI
EX I STING SHERWOOD 24-INCH TRANSMISSION MN
PROPOSED CITY OF TIGARD TRANSMISSION MAIN
,� 12
City of
Tigard
FT " Construct Parallel
Pump City of
King City Transmission
Station
r
4 M
PROPOSED .. ,
$39.0 I ALATINRI °, City of
.. .,(. CROSSIN Durham:.
Acquire Sherwood
" DiaMain
v
City of
Tualatin
r
`y$ PROPOSED 'mow
07,OF TIGAR iS
UMP STATION
':..yv tO MG RISE RVUiR) j
City of 6\a Transmission Piping
Sherwood y
3 M
r r : is
To •
t, Purchase Ex
Transmission Capacity
91,11 .8 M
Construct Parallel
EXISTING
VAULT EOD _ Transmission
RVENUE METER
W VAULT
"202 M
City of •
Wilsonville
N
WRWTP Expansion
SCALE IN FEETF_
��''' RNER y
TREATMENT �ry
LEGEND "`"NT `ol #
..,_.d. ..- 1
13
TO REGIONAL
TERMINAL RESERVOIR
Scenar io 2
TIGARDtO MG
RESERVOIR
OE 470 FT..
^�•°-- City of
Tlgerd - ...e..
City of ..,...
King City
g r
i
u�IuNR
Cit
RIIrr i y OPS
.• 24'
..._..nq �a..
City of
Tualatin Major regional
I
City of
Willamette River
Sherwood
0
TO CITY OF SNERWOOD .a , supply development
DISTRIBUTION
.W IE •.
tOCnYOf SMERWODO �ylr W i t h partners
SUNSETRESERVOIR '
3 _
M-
v
a �-
N s
city T,t
3500 0 3-500 will onville
SCALE IN FEET § PROPOSED IUPPERI
WILLAMETTE RIVER Pt.ANT
WATER TREATMENT
PLANT
LEGEND EXISTING(LOWER)
- PROPOSED CITY OF 71GARD TRANSMISSION MAIN PLANT
�� PROPOSED REGIONAL TRANSMISSION MAIN
XIIIIIIIIIIIIIIIII PROPOSED ROADWAY
- EXISTING WILLAMETTE RIVER WTP TRANSMISSION MAIN - -.
- EXISTING SHERWOOD 24-INCH TRANSMISSION MAIN
14
-TO REGIONAL
TERMINAL RESERVOIR
TIGARD 10 MG
RESERVOIR
OE:470 FT
City ut
TIga1 d
City of
King0ty
coy of
DuIham
City of
Tualatin
City Of
Sherwood -
SF
iIf
roCITY
e16TR16ui10N e Regional Transmission
x
10 CITY Of SHERW000� I-
SUNSEiNE9ERVOIR
$241 . 1
0
WRWTP Expansion
i9
N $
City If
7500 13500 Wils TV isle `+
�� 'ftUPliSEO iVPPt k} $115.3
SCALE IN FEET WILLAMETTE RIVER
ATER TREATMENT
PLANT
LEGEND �' 'EXISTING ILOWERI
PLANT
� PROPOSED CITY OF TIGARD TRANSMISSION MAIN
PROPOSED REGIONAL TRANSMISSION MAIN
PROPOSED ROADWAY -
EXISTINGWILLAMETTERIVERWTPTRANSMISSIONMAIN
EXISTING SHERWOOD 24-INCH TRANSMISSION MAIN
16
TO REGIONAL
✓ TERMINAL RESERVOIR
F
¢\q
2 i
8
TIGARD IO MG
RESERVOIR
OE:470 FT
i
1 City of
Tigard
City of
King City
j`
i
uumilnaliw City of, �4
urham:
e
..�, �...__., Clty of
Tualatin
City of
Sherwood
TOCITYOFSHERVU D
DI3TPI8UigN t� � �' •
._-__.._.7_
TO CITY OF 3HERW000 �.-.
SUNSET RE3ENVO.. 4
a ' .
W' ' WRWTP
i
N g
Expansion
Cityf
J500 0 3500 VMS IV.11. I
SCALE IN FEET ROPOSED(UPPER) $115.3 M
WILLAMETTE RIVER PLANT
WATER TREATMENT
PLANT
LEGEND ®. EXISTING IIOWERI
- PROPOSED CITY OF TIGARD TRANSMISSION MAIN PLANT
- PROPOSED REGIONAL TRANSMISSION MAIN
� PROPOSED ROADWAY
EXISTING WILLAMETTE RIVER WTP TRANSMISSION MAIN -
EXISTING SHERWOOD 24INCHTRANSMISSION MAIN
15
TO REGIONAL
TERMINAL RESERVOIR
b"
f i
TIGARD 10 MG-\ -
U 1 RESERVOIR \ r
OE:470 FT \\ 1
- City of
Tigard -
i
City-
i
ify of • d
King City ..4
Transmission
' t
City of $15.0 oIwi.Rr'r. urham;; '"
City of ..
�. Tualatin
City of i
Sherwood -- -
TO CITY OF SMERWOOO ` .
D43TRI8UTro 7u�, • • , r •
S
g
TOC'".fSER
SUNSET RE ERVORVOIR
$241 . 1
Yy,
ig .. WRWTP Expansion
N
City f I
35cC 0 3.500 Wils Ville ( $115.3
SCALE IN FEET ROPOSEDIUPPERI
WILLAMETTE RIVER PLANT
ATER TREATMENT
PLANT
LEGEND M -Exlsnwc It owER l
PROPOSED CITY OF TIGARD TRANSMISSION MAIN PLANT
- PROPOSED REGIONAL TRANSMISSION MAIN
PROPOSED ROADWAY
- EXISTING WILLAMETTE RIVER WTP TRANSMISSION MAIN
- rk STING SHERWOOD24-IN1N1R1NSMISSION MAIN
17
TO REGIONAL
TERMINAL RESERVOIR ,
TIGARD IO MG
RESERVOIR
OE:110 FT
1., City of
Tigard
ity of City—Owned
KingCity
Transmission
City of
City of
Tualatin
r
s
Regional Transmission
& Storage
WRWT
Q
P Expansion
Cit t
:spa o ssoo
Wil v11i0
—1
■
3 M
SCALE IN FEET "`� WILLAMETTE RIVER
r.,rTERTREATMENT
PLANT
LEGEND EXISTING ILOWERI
PLANT
VA
18
■ Supply development timing
■ Potential partners
■ Availability of existing unused capacity
and infrastructure
■ Phasing opportunities
19
Thank you '.