03/12/1997 - Packet Public
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Servtn K i and Kan AL WAB'ER BOAR MEETII�TG
INTERGO�lE1�N1VIEN- 1,
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ednesday, March 12, 1997 r
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� .1: Call to Order ;•
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2 Roll Call/Introductions
a Introduction of New Members , Patrick C, it
b "Elecfon..of;orffieers
3 Visitor. Comments - �..
d
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3:
': 9 -
11 C
4 3Appro.�e Meeting.Mmutes 'January 48, 1997
5 Request for Facility Use Bili;Monahan <k
6 Consortium :Update Paul Hurit
7 1vlenloT Reservoir4.
Update Ed Wegner
8=: ;ADA;Facihty Compliance Memo.• u
9 �`�Duector's Report a
1
y
10 Non Agenda Items:
11 Adjournment
FA'/fight O nner w ,be seared at
Executive Session The 'Yntergovernmenta/ Water Board may go into` '
Exeduff ' Session under ttie provisions of ORS 192 660 (7J (dJ, (eJ, & (hJ
to discuss: labor.; �eNations real property ransacdons,' and=cur'rent an
pending /itigationh issues: . Al/. discussions within;' this sessionl are
confialentia/, therefore nothinghis. meeting may be'disc%sed by
those present Representatives of the news media`a to;,attend„
this session, but`>nust'nof'.drsc%se any`",informaion'.a!iscussed during Phis:
ketfiyliwbl3 I2'egn
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Members Present: Beverly Froude, Paul Hunt, and Jan Dransholt
Members Absent: Bill Scheiderich
Staff Present: Ed Wegner, Kathy Kaatz, Loreen Mills, Mike
Miller
Visitors Present: Jack Polans, Michael Denton
1. Call to Order
The regular meeting of the Intergovernmental Water Board was
called to order at 5 : 35 p.m.
• 2 . Roll Call and Introductions
Roll call was taken with all members present including the new
representative from the City of King City, Jan Dransholt.
Commissioner Scheiderich was absent.
3 . Visitor Comments
Mr. Polans was present and discussed the executive session
portion of the meeting Mr. Polans continued by saying that he
would like the following added to, the Agenda: The IWB cannot
discuss public information and if they do the representative
of the news media can write that information in their
newspaper without notifying the IWB members .
Mr. . Polans then discussed the meeting minutes draft of
November 13 , 1996 and discussed the article from the Oregonian
regarding Bull Run water and getting the lead out. Mr. Polans
questioned what percentage was the lead content? He continued
by discussing from the November 13 , 1996 minutes page 2 , #6
the Regional Water Supply and Consortium Update. Mr. Wegner
clarified that the items discussed under the above referenced
minutes have nothing to do with Washington County or Senate
Bill 122 , but have to do with the Portland Metropolitan Water
Providers Meeting (27 water purveyors) that have been held.
Mr. Polans questioned whether the firm of Cochran, Overton and
Cochran are doing consulting work? Mr. Wegner stated not on
the RWS P .
Mr. Polans then stated that the firm of Cochran, Overton and
Cochran, consultants for Washington County and working on
Senate Bill 122 claim that the City of Tigard has many water
problems in King City, City of Durham and the unincorporated
area. Mr. Polans questioned. how we know that the IGA between
Tigard, Wilsonville, Tualatin, Sherwood, Tualatin Valley Water
District will not end up the same way the IGA with Tigard and
Lake Oswego?
Mr. Polans continued by discussing information on page 4 of
the same minutes, item number 8 and question the address of
the tax lot #600? Mr. Wegner stated he did not know the
physical address of the tax lot since at this time it is a
vacant piece of property.
Mr. Polans then questioned on page 5 of the same minutes
(water supply) #2 whether there was public hearing held on
this matter? Mr. Wegner stated that this was brought before
this Board approximately two years ago and there was a
recommendation to the Tigard City Council in which a
presentation was made and they voted to approve the contract .
Mr. Polans questioned whether there was a written report on
this public hearing? Mr. Wegner stated that he has a contract
with TVWD. Mr. Wegner stated that Mr. Polans could obtain
this information through the City Recorder vis the minutes of
that meeting.
Mr. Polans stated that according to the minutes Tigard is
interested in building on the Willamette River for drinking
water and questioned whether Mr. Wegner had a report on this
matter? Mr. Wegner responded by stating he was unclear on
what Mr. Polans was wanting. Mr. Polans questioned whether
Mr. Wegner had addressed these questions? Mr. Wegner stated
that the executive session notation on the agenda is in
accordance with ORS 192 . 660 (1) (d) , (e) , & (h) . Mr. Hunt
concurred that this information is in compliance with the
Oregon State Statue.
Mr. Michael Denton, 15673 SW Barrington Terrace, off Beef Bend
Road was present to discuss a concern on water pressure at the
above listed address. Mr. Denton' s concern is that he resides
at the top of the hill in the Barrington Heights (Division 2)
area built approximately five years ago and at that time had
very good water pressure. Mr. Denton continued by saying that
at the best time of the day they only have 40-50 psi . Mr.
Denton questioned what can be done to increase water pressure
in this area? He continued by saying that a couple of times
employees from the City have come out and checked the water
pressure and he was told there was nothing that could be done .
Mr. Denton is concerned about the additional building in that
area and how this will effect the already low water pressure?
He also stated that they have multiple occasions where they
have experienced brown water.
IWB Meeting Minutes - January 8, 1997 Page 2
Mr. Wegner, stated that he and Mr. Denton had spoke before the
meeting and informed him that he could answer his questions in
general terms although he would need to speak with Mike Miller
in., regards to :the 'hydraulics . Mr. Wegner continued to -state
that it is our -intent- to place a new pump station on Beef Bend
Road which should help the low pressure. This will be :designed
and - constructed in May/June of 1997. This will be at 137th
and Beef Bend Road. Commissioner Hunt questioned whether this
project has, been budgeted? Mr. Wegner stated it is already
budgeted.
Mr. Wegner response to the brown water is that there is not a
.lot that can be done since there is a lot of construction in
that. area. Mr. Wegner stated that DEQ requires -a special
permit to discharge hydrant water. At this time no one has a
permit to do this . Mr. Wegner stated that there is a task
force in the Metropolitan .area that is attempting to get a
permit with DEQ to flush these systems. Mr. Wegner stated
that we can pull the meter and run a line and flush that
system. Commissioner Hunt questioned how we can flush a line
in that manner"when we cannot, flush a � hydrant? Mr. Wegner
stated that we can flush this into 'a sanitary sewer through
his house.
Commissioner Froude questioned this being a result of new
' construction? Mr. Wegner stated that when lines are tapped
into it stirs up the water due to the force. Commissioner
Froude also questioned whether we notify these residents that
we will be tapping into their line? Mr. Wegner stated that in
the past we have not - but will in the future. Commissioner
Hunt- stated that the Water Department looks bad when the
customers are unaware: of what we are doing. Commissioner
Froude questioned the possibility of notifying, when we
anticipate a change in water color. Commissioner Hunt
questioned the value of sending out information with 'billings,
and information ' regarding the issue with DEQ not -allowing
flushing.. Mr. Wegner stated that we- have done news releases
with the Oregonian, Tigard Times .and the Courier..
Commissioner Froude questioned who should be speaking with
DEQ? Mr. Wegner stated that since' the fire districts are
involved this will be resolved quicker.
4 . Approval ,of Minutes
A motion to approve the minutes of the November 13 , 1996
meeting was made by Commissioner Hunt and seconded by
Commissioner Froude. A voice vote was taken which passed
unanimously.
IWB Meeting Minutes - January 8, 1997 Page 3
S. Compliance Review of Water Facilities - Loreen Mills
Loreen Mills was in attendance to bring a request to the Board
to authorize staff to have a consultant do an ADA review of
Water facilities. Commissioner Hunt questioned whether Ms .
Mills was requesting authorization to receive quotes or to
hire a consultant? Ms. Mills stated that we would get quotes
and then come back to the Board for approval to hire a
consultant. Ms. Mills continued by saying that the Purchasing
Rules authorizes staff, if funds are available and budgeted to
obtain three quotes and go with the lowest quote from the firm
that is able to complete the work. Ms. Mills stated that the
decision is the Boards on whether to authorize her to obtain
quotes and come back for further authorization or to get
quotes and proceed with the contract. This issue needs to be
addressed in the 1997/98 budget with this proposal due to
Finance in the next six weeks .
Ms. Mills stated that ADA was passed in 1990 (Federal
Legislature) which mandated local government to review their
services, programs, policies and procedures as well as
reviewing or evaluating.all buildings and facilities to ensure
that they are accessible to the disabled community. When the
City of Tigard did their evaluation in 1992 (published 1993)
prior to the Water District merger, a consultant was hired to
complete this work. While reviewing the ADA Plan for the
City, Ms . Mills continued by saying it was noted that the
Water facilities had not been included. The deadline for
compliance with the ADA Act was in 1991, 1992 , and 1993 .
Since these facilities had not been included a written plan
must be completed to be in compliance.
Ms. Mills stated that compliance with the ADA on hiring
procedures has been completed by the Human Resource Department
under the umbrella of the City of Tigard. This plan would
include all Water facilities which include the Water Building
and Canterbury facility. According to Ms . Mills there have
been recent changes to the ADA and she is unsure how these
apply to reservoir sites and pump stations .
Commissioner Hunt stated that the Water Department is charged
a percentage of the overhead of the City (each department) and
as long as this would be an effort that Ms . Mills would spend
a lot of time on, would there be an additional charge for your
time? Ms . Mills stated that this will be reviewed during the
budget process, although currently a percentage of her time is
charged to the Water fund for risk management issues. After
the process begins, if it is noted that more time is being
spent than initially anticipated it will be adjusted
internally. Commissioner clarified his question by asking if
Ms . Mills is wanting authorization to hire a consultant only
or for her time as well? Ms . Mills stated at this time, funds
are being requested to hire consultant services .
IWB Meeting Minutes - January 8, 1997 Page 4
Commissioner Drd_ ngs,holt questioned the- amount of funds we will
be looking at?' Ms. Mills stated that since it is unknown what
effect the changes to the ADA will have, it is anticipated
that -the' costs will probably be $3, 000. This -work will cover
a walk through of all•-facilities;. interview staff to determine
if there are. problems ' with services provided, or programs
provided in the .water delivery area. A final report should be
completed before the December meeting of the IWB.
Commissioner Drangsholt questioned how long this survey would
take without the use of a consultant? Ms. Mills stated up to
three years with current staffing and we would still have to
hire someone to give expert advice. Commissioner Hunt
questioned whether the Board could authorize the maximum
amount of. funds to hire consultant and complete the , study
without coming back to Board for additional approval? Ms .
Mills stated that this would help speed up the process .
Commissioner Froude questioned whether we do not include a
dollar figure since pit is unclear at this time what the costs
will be? Mr. Wegner stated that if the Board, approves the
plan to receive quotes on consultants, he could approve up to
ri1 $7, 5,00 and report back to the Board. In the future the Board
will see ADA compliance in future budgets. The Board
c4r;t_ concurred to allow Ms . Mills to receive quotes on hiring of
xt: - consultant. Ms . Mills stated that she would be happy to file
f.x.:• periodic progress reports on this process.
6 . Director' s Report
a. . Menlor Site - the tree survey has been completed. The
test -boring has .been completed. Mr. Wegner has met with
,the engineers "and .they have approximately 700 of the
design phase complete. Hopefully 'by the March meeting
they will `have a good rendering to show the Board. An
appraiser has been hired to appraise tax lot 600 (right
of way access'). The property- owner has also hired an
appraiser and we .can begin negotiation for purchase. If
the easement is resolved within the next ,30 days we will
be on target with the design plan. Mr. Wegner stated
that the property owner will have to determine whether
they will sell all 2 . 7 acres or just .7 acres needed for
the easement.
b. Regional Consortium - City of Tigard after reviewing
documents distributed to the Board we have . agreed to
become a member of the Regional Water Consortium. A
draft set of by laws is being reviewed at this time .
There will be three different groups working to begin
with different groups being added later. The first group
will be the Consortium Board made up of elected officials
from member agencies (23) with Commissioner Hunt
• representing the City of Tigard and City Councilman Rolhf
as the alternate with their first meeting February 6 .
There will be a Technical Committee made up of 26
IWB Meeting Minutes - January 8 1997
individuals represented by ths with Mr. Wegner
representing City of Tigard. The Technical Committee
ill meet monthly. There will also be a ten member
teering Committee with three members from Washington
ounty, three from Clackamas County, three from Multnomah
County and a representative from Metro. The three
Washington County representatives will be Jesse Lowman
(TVWD) ., Dave Winship (Beaverton) , and Ed Wegner (City of
Tigard) . There are twenty-three members that have joined
/
V4 4 and have adopted the RWSP for the Metropolitan area. The Q difference in the number of participants and voting
members is that City of Troutdale has said they won' t
join the consortium and the remaining three members have
not met.
C. Regional projects - Continue to work with the Willamette
River application. The committee will be meeting next
week on how to handle our individual rights and
collective rights requested. With all applications we
were asking for two to three times the amount the RWSP
indicated the need for. Mr. Wegner stated the group is
looking at revising the current requests. The City of
Tigard may reduce our request and use some of TVWD and
Wilsonville 150 mgd and they will allocate 40 mgd to
Tigard with an ownership right.
Commissioner Hunt stated that the assumption that this
project of building on the Willamette will go through,
what if down the road this project falls apart and we
have reduced our request for water rights? Mr. Wegner
stated that the balance that we don' t take from TVWD and
will leave those to be approved at a later date. Mr.
Wegner continued by saying that if we combine with anyone
it will be a joint partnership divided upon by the amount
of water taken by the group. Mr. Wegner stated we will
have a partnership and some ownership. Commissioner Hunt
questioned the approval timeline on this application?
Mr. Wegner stated that the Water Resources Board' s big
question is why are the numbers so high when the Regional
Plan states a lower need. We will need to get these
numbers adjusted to proceed.
d. Hydraulic Study - Mr. Wegner stated we are currently
working on a hydraulic study of a line that goes through
eastern side of Tigard called the Washington County
Supply Line along with Portland, Tigard, Tualatin,
Sherwood and Wilsonville to study the amount of water
that can be pulled down from Florence Lane in Tualatin
Valley to add additional water through that system to
feed Tigard and Wilsonville.
e . Water purchasing - Mr. Wegner stated we are within
pennies of a new pricing with Portland which will allow
us to buy a lot more water at a reasonable price.
IWB Meeting Minutes - January 8, 1997 Page 6
.., .. .-.. .. :. •.:..-.`. .... ' ' :...N
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HoPefully within the next month we will have a new,
,pur.chasing scenario which will probably ' become a.
permanent scenario.
f . Water Conservation - The Coalition is providing .another
water wise landscaping seminar on March 15 at `PCC Rock
Creek. We will be cost sharing with them as part: of
Coalition expenses .
7 . Non Agenda Items
Mr. Polans questioned that according to memo from Water
Director we have to wait 3-4 years or 2-3 years for planning
from the minutes on page 5? ' Commissioner Froude questioned
whether this could be addressed after the .meeting with Mr.
Wegner? Mr. Polans questioned what the cost of waiting 'for
3°-4 year or 2-3 years for planning and construction to the
consumer, in King City, Durham and the unincorporated area?
Comm1.ssioter Hunt stated that' what this. is, -really saying is
that: we are delaying 3-4 years to study the issue. Mr. Wegner
f stated that, these costs are unknown at this time,, ,since we do
-
not know what we will be doing. Mr., Wegner continued by
telling Mr. Polans that if he wanted to' see him he could make
an appointment -for them to discuss .
Adjournment
Commissioner Hunt made a motion to adjourned ..the meeting at
IWB, Meeting Minutes - January 8, 199'7 Page .7 ,
TIN
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Murrq Sraiih&Associates,Inc.
Enoeeglanners 121 S.W.Salmon,Suite 1020 m Portland,Oregon 97204 a MONT 503-225-9010 FAX 503-225-9022
96-0341.201
February 4, 1997
Mr. Ed Wegner
Public Works Director
City of Tigard
.131,25 SW Hall Blvd
Tigard, Oregon 97223
Re: Menlor Reservoir
Dear Ed:
Transmitted herewith for your review and comments are the 50 percent level construction
drawings for the above referenced project. The main emphasis of review at this stage should
• be related to general concepts, locations of facilities, and connections to existing
infrastructure.
Also enclosed is a copy of the "front end" contract documents, including instructions to
bidders, proposal form, bond forms, general conditions and supplementary general
conditions. It is important that these be reviewed by the City attorney, as they,are the basis
of.the legal conditions between the City and the;contractor. Based on the estimated
construction,cost of this project, we recommend that the insurance coverage amounts listed in
the supplementary general conditions be reviewed and increased as appropriate.
We have also prepared and enclosed an updated preliminary estimate of construction cost for
this project, dated February 3, 1997, along with a copy of the estimate from our preliminary
engineering report of November 17, 1995. This new preliminary estimate is based on our
understanding of the final project scope, the geotechnical investigation findings, and our final
design calculations. The major differences between this estimate and our previous estimate
are as follows:
• Solid rock was discovered at a relatively shallow depth during the geotechnical
investigation. The previous estimate assumed that solid rock was at a greater depth, and
that no rock excavation would be required. We have made a preliminary estimate of the
• solid rock quantity in the excavation for the reservoir. It is also possible that solid rock
will.be encountered in a portion of the access road and trench excavations. Due to
uncertainties in the solid rock quantities and in the cost to excavate solid rock, we have
presented a rangeof the potential cost that may be,associated with this item.
• Mr. Ed Wegner,
February 4, 1997
Page 2
• Due to concerns by USA regarding discharge of chlorinated water from potential
overflows and draining of the reservoir, we are proposing that the reservoir
overflow/drain and'all on-site drainage be discharged into the existing storm sewer
system at the intersection of Scholls Ferry Road and 154th. This arrangement will bypass
existing man-made wetlands and water quality ponds associated with the residential
developments north and west of the reservoir site. The length of the.new storm drain
before it enters Summer Creek and the installation of hydraulic jumps in the manholes
will provide aeration'to minimize the chlorine residual from an unanticipated discharge.
The current construction cost estimate, excluding solid rock excavation, is approximately 3
percent higher than the previous estimate. However, the presence of solid rock causes the
new estimate to be approximately 25 to 4.6 percent higher than the previous estimate. We
anticipate refining the estimated cost of solid rock excavation as we develop the final
estimate of quantities for the bidding document.
Please do not hesitate to call if you have questions regarding any of the above items. In order
to.stay on schedule for completion of the drawings and specifications, we would appreciate
receiving your comments on the construction drawings and "front end" contract documents
by February 15.
Sincerely,
MURRAY, SMITH & ASSOCIATES, INC.
/7�
James L. Helton, P.E.
Senior Engineer
Enclosures
® CITY OF TIGARD
3.5 MG MENLOR RESERVOIR
PRELIMINARY ESTIMATE OF CONSTRUCTION COST'
February 3, 1997
Item Cost
1. Mobilization, Bonds and Insurance $ 50,000
2. Construction Staking 8,000
3. Tree Removal 46,000
4. Clearing and Grubbing 23,000
5. Erosion Control 25,000
6. Earth Excavation 1551000
7. Solid.Rock Excavation 475,000 to 950,000
8. Reservoir Foundation Preparation 75,000
9. Underdrain System for Reservoir 25,000
W. 3.5 MG Prestressed Concrete Reservoir 1,270,000
11. Access Road 43,000
12. . 18" Storm Drain to Scholls.Ferry Road on 154th 105,0.00
13. Water Quality Facility 25,000
• 14. 16" and 12" Waterlines to Distribution System 178,000
15. Yard Piping, Valve Vaults and Connections to Reservoir 90,000
. 16. Telemetry/Control-Building 101000
17. Instrumentation, including C12 and pH Analyzers 20,000
18. Electrical Work, including service, lighting, wiring field devices 30,000
19: Fence 35,000
20. Landscaping 50,000
Subtotal $ 2,738,000 to 3,213,000
15% Construction Contingencies 411,000.to 482,000
Total Estimated Construction Cost $ 3,149,000 to 3,695,000
• Footnotes:
1. This 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, final project scope, method of implementation,
schedule and other variables.
FR--M MENLo2 flESEZvb/2 /REL/M/N.4R�
DF51(;AJ /3FPo2T o>= No��►�be2 17/ lq''57
Exhibit"C"
PROPOSED 3.5 MILLION GALLON MENLORRESERVOIR
PROJECT COST ESTIMATE SUMMARYt
The estimated reservoir costs are based on the following assumptions:
_ No rock excavation included.
_ No telemetry.-system costs included.
_ Reservoir is assumed to be a presstressed.concrete reservoir.
A 35% contingency, administration and engineering allowance included.
Construction bye contractors.
An Engineering (ENR') construction cost°index of 5506 (8/95).
Item Cost
1. Site Work $ 183,000
2. Reservoir Structure $ 1,700,000
3. System.Connection and Yard Piping 259,000
4. Landscaping and Fencing 50;000
Estimated Construction Cost $2,192,000
35% Contingency, Administration & Engineering 767,200
Total $2:959.20
SAY $2.960:000
1 The cost estimates presented are opinions of cost based on the assumptions stated and developed from information available at the time of
the�es tima ie: Final costs for all projects will depend on actual field conditions,on actual material and labor costs,final project scope,
project implementation and other variables.
MEMORANDUM
CITY OF TIGARD
TO;: Intergovernmental Water Board
FROM: Loreen Mills, Risk Manager
DATE: February 8, 1997
SUBJECT: ADA Review of Water Faciliti s
f would like. to respond to a question raised at the last Tigard Water District meeting
regarding the planned ADA review of water facilities., Mr. Ed Wegner reported to me
that there was concern by TWD that the water.facilities should not be reviewed for ADA
compliance with water funds.
I suggested the use of water funds to pay for the review of facilities because the
facilities were not in'.compliance-with the American's:VVith Disabilities.Acton January 1,,
1994 when the operations were assumed by,City of Tigard. Since all,four jurisdictions
represented. by the IWB are now responsible for the water facilities, I believed the best
way to finance the work was through water funds .
There is another way to finance this review. Each jurisdiction represented by the IWB
could pay their share of the .cost for review from their own budgeted funds.. I believe
this process to be more costly administratively'for billing/collection time.
Direction Needed From 1WB: Which method of financing the water facilities ADA
review do you,wish to use?
I am proceeding with the ADA review of water facilities as directed by the IWB at your
1/8/97 meeting. If you wish to change the method of 'financing this review, please
advise as soon as you can and I will followup with our Finance Director.
Thank you for your review of this issue.
• Im/h/adawater.doc
9pH Adjustment,-., .Questions and Answers
This month the Water Bureau began treating Bull Can I remove the sodium hydroxide from my
Run water with small amounts of sodium hydroxide drinking-water?
to adjust the pH level of the water. This treatment is Again,there is no sodium hydroxide in our drinking
the first step in the Lead Hazard Reduction Program water. While we don't believe it is necessary, a
to control corrosion. A few customers called with customer can remove the trace amounts of dissolved'
questions about this treatment: sodium and bicarbonate that result from the addition
Isn't sodium hydroxide lye? Does this mean of sodium hydroxide by usingrelatively
there is lye in my drinking water? sophisticated water treatmentsystems. Generally,
Sodium hydroxide is commonly known as caustic most home treatment systems(including most
soda or soda lye. However, this does not mean that particulate ���ters ar�d carbon filters) will not remove
dissolved minerals such as'sodium and bicarbonate.
there is lye present in our drinking water. When Reverse osmosis units and filter.cartridges certified
sodium hydroxide is added to our water, it for mineral removal may be capable of reducing,the
immediately changes chemical composition; the odium and bicarbonate levels of the treated Bull
molecules'of sodium hydroxide combine with the Run water. Any in-home treatment unit needs
naturally,occurring carbon dioxide (CO2) in Bull regular maintenance or it can degrade water quality
Run water to form a very low level of sodium by introducing',bacteria and other contaminants.
bicarbonate (baking soda) which remains dissolved
in the water. Why didn't the Water Bureau use lime (calcium.
10here are about,l to 2 milligrams per liter.(parts per oxide),soda ash (sodium carbonate), or baking
million or ppm) of naturally occurring sodium in soda (sodium bicarbonate) for corrosion control
Bull Run water. After adding 1 to 2 ppm of sodium treatment?
hydroxide, the sodium level.is increased by.about .5 The Water_Bureau conducted,an extensive.study
to. 1 ppm, resulting in a sodium level of to`l.5 to.3 looking at options.for-corrosion_,control treatment.
ppm. This sodium level is extremely low compared- We conducted treatment testing and met with
to other drinking waters in:the US. industrial, commercial,,institutional and residential
increase1 elp evaluate treatment alternatives.
The hydroxide that comes from sodium hydroxide
Lime s the calcium content,resulting'in a
is a natural component of water. Water is HO (two
hydrogen molecules and one oxygen molecule). slight increase in the hardness and alkalinity of the
Hydroxide is OH (one hydrogen molecule and one water. Although this change would not-'have been
oxygen molecule). The hydroxide molecule is what noticeable to most customers, it would have adverse
helps raise the pH of the water. impacts on some industrial users.
The Portland Water Bureau uses only food-grade The advantage of sodium-based chemicals such as
sodium-hydroxide that conforms to national soda ash,baking soda and sodium.hydroxide is that
standards established by the American°Water Works they neither increase the hardness of the water nor
contribute scale-forming minerals. The Water
Association for drinking water treatment:The Bureau selected sodium hydroxide because of its
National Sanitation Foundation has certified this lower overall cost, considering both chemical cost
sodium hydroxide,as an;approved drinking water
additive. This sodium hydroxide is one of the and treatment facility requirements, and because its
hest purity grades available. It is produced in use results in minimal changes in overall water
quality.
Portland using Bull Run water.
MEMORANDUM
CITY OF TIGARD, OREGON
TO: IWB Board Members
FROM: Mikemiller, Operations Manager
DATE: March 6, 1997
SUBJECT: Issues raised by Michael Denton
At the last IWB meeting; Mr. Michael Denton commented to the Board his concems regarding the
water color-problems in November 1996 and also the amount of water pressure to his residence on
SW Barrington.Terrace. .
Water Color
The water color problem was a result of some construction work being performed by a private
contractor during the week of.Thanksgiving. Instead of terminating water service to approximately
250 residents for 8 hours, we delivered water from a different direction, which caused a disturbance
• in the water system. The disturbance did result in some minor coloration of the water. In addition to
changing the direction of the water flow, after the private contractor completed the connection to the
1.6-inch water distribution.main on SW Beef Bend Road, we flushed that section of waterline. This
resulted in high velocity water flows and a darker- coloration of the water in the Woodhue,
Barrington Heights and Fox Glove subdivisions. The high water flows1rom the flushing of the water
system,; stirred up some sedimentation,in the water lines. Sedimentation is a natural occurrence in
water mains due to the relatively low,flows of the, local water system. Although the system was
flushed for several hours, .a residual coloration continued. The residual,coloration ran its course
and settled out within the next 24 to 36 hours.
At no time was there, any foreign material introduced into the system and in no way did the
disturbance indicate that the quality of our drinking water failed to meet Safe Drinking Water
Act standards. All microbial'analysis indicated that the water was safe to drink.
Since the incident,in November, we have recently completed an extensive flushing program of the
water mains feeding the Barrington Heights, Fox Glove, Orcas Estates and Woodhue subdivisions,
The flushing of the water mains in this area was very successful, and we hope that with routine
flushing we will avoid a similar situation in the future.
Water Pressure
Also at the IWB meeting that night, Mr. Denton expressed his concern that the water pressure to his
residence was inadequate. Mr. Denton has indicated that he had call the office requesting that field
personnel check' the water pressure at his house. Our field personnel would' check the water
pressure and reply that there was nothing that could be done to increase the water pressure'due to
• the elevation of the subdivision. Mr. Denton lives on SW Barrington Terrace, which is located at the
top 'of the zone, and his water pressure would not be any greater than the water pressure at the
r
outlet side of the pressure reducing station.: If we increased the outlet pressure to increase the
water pressure for Mr. Denton, then the water pressure at the bottom of the 550.foot zone in
Barrington Heights would be so great that they 'would create other problems for the distribution
system.
Upon my interview with Mr. Denton, he mentioned that at times there was adequate pressure,
however, the pressure seem to be less in the mornings and the evenings. He did mention that
there was plenty of pressure on Sundays for showers.
At this time it was apparent to me that we may have'a pressure reducing valve in one of our vaults
malfunctioning. This was confirmed after we placed a pressure recorder device at the pressure
reducing valve station. The outlet side of the pressure reducing station was set for 50 psi to
correspond with the 550 foot zone. However, when the water demands increased during the
morning and evening hours, the pressure dropped to 35 psi during these high demand periods.
We contacted GC Systems in Seattle, Washington, and requested that they send one of their
technicians down to help troubleshoot the malfunctioning Cla-Val pressure reducing valve. GC
Systems is the authorized service provider for Cla-Val.
With the.growth that has occurred in this area overthe last couple of years; the pressure reducing
valves speed control(this controls the rate and speed at which the valve opens and closes) was out
of calibration. Basically the valves were opening too slowly and not allowing enough flow to
maintain;the pressure as the water'demands increased.
• After GC Systems finished recalibrating the pressure reducing valves, we continued to monitor the
pressure on the outlet side of the valves. With the adjustments made, the valves were once again
functioning correctly with a constant discharge of 50 psi.
We followed-up with Mr. Denton, notifying flim of the corrections that had been made to the valves.
Mr. Denton indicated that he .was very pleased with the "increased" water pressure and our
responsiveness to his concern.
J 9
Date Lake 0. in Bull Run TVWD in Well#1 in Well#2 in Well#3 in Total MG MG in Demand
® MGD in MGD MGD MGD MGD MGD Pur./Prod. Storage in MG
1/1/97 1.55 2.05 1.04 4.64 19:06 4.27'
1/2/97 0.859 2.06 1.04 3.959 18.58 4.439
1/3/97
0.1392' 2.06 1.04 3.492 17.74 4.332
1/4/97' 1.7 2.06 1.04 4.8 1:8'.06 4.48
1/5/97- 2.25 2.05 1.04 5.34 18.94 4.46
1/6/97 0.089 2.05 1.04 3.179 17.75 4.369
1/7/97 2.21 2.05 . 1.04 5.3 18.84 4.21
1/8/97' 1.29 2.05 1.04 4.38 18.94 4.28
1/9/97 0.098 2.05 1.04 3.188 17.83 4.298
1✓10/97 0:844 2.05 1.04 3.934 17.61 4:154.
1/11/97 1.93 2.05 1.04 5.02 18.24 4.39
1/12/97 0.863 2.05 1.04 3.953 17.77 4.423
1/13/97 1.64 2.06 1.04 4.74 18.18 4.33
1/14/97 1.09 2.07 1.04 4.2 18.21 4.17
1/15/97 0.901 2.07 1.04 4.011 1801 4.211
1/16/97 -2.14 2.07_ 1.04 5.25 19.04 4.22
1/17/97 0.022 2.06 1.04 3:122 18.07 4.092
1,/18/97 1.59' 2.04 1.04 4.67 18.44 4.3
1/19/97 1.33 2.04 1.04 4.41 18.53 4.32
1/20/97 1.3 2.05 1.04. 4.39 1,8.45 4.47
1/21/97, 0.836 2.05 1.04 3.926 18.23 4.146
1M/97 0.965 2:05 1.04 4.055 18.16 4.125
1/23/97 1..87 2.04 1.04' 4.95 19.05 4.06
1/24/07 0 2104 1.04 3.08 17.93 4.2
1/25/97 1.66 2.03 1.04 4.73 18.39 4':27
1/26/97 0.446 2.02 1.04 3.506 17.71 4.186
1/27/97 1.72 2.02' 1.04 4.78 18:27 4.22
1/28/07 1.15 2.03 1.04 4.22 18.4 4.09
1/29/97 0.899 2.02 1.04 3.959 18:15 4.209
1730/97 1.77 2-.01 1.04 4:82 18.79 4..18
1/31/97 0.102 2 1.04 3.142 17._93 4.002
Averages 1 1.145355: 2.045161 1_.04 #DIV/0!• #DIV%0! 4..270864 -1.8.3 4:294955
Page 1
I �
Feb97
MGD MGD MGD MGD
Date Lake O. in B Well #2 in Well #3 in Total MG MG in Demand
Bull Run TVWD in Well#1 in MGD MGD Pur./Prod. Storage in MG
2/1/97 1.14, 2 1..04 4.1.8 17.86 4.25
2/2/97. 2.845 2 1.04. 5.885 19.02 4.725
2/3/97 0.495 2.02 1.04 3.555 18.27 4.305
2/4/97 . 1.59 2.02 1.04 4.65 18.82 4.1
2/5/97 1.55 2.03 1.04 4.62 19.3 4.1.4
2/6/97' 1.0.2 2;03 1.04 4.09 19.26 4.13 '
2/7/9.7 0 2.03 1.04 3.07 18.34 3.99
2/8/97 1.44 2.03 1_:04 4.51 18.56 4.29
2/9/97 0.334 2:02 1.04 3.394 17.63 4.324
2/10/97 1.67 2.03 1.04 4.74 18.13 4.24
2/11/97 1.31 2.02 1.04 4.37 18:41 4.09
2/12/97 1.21 2.01 1.04 4.26 18.58 4.`09
2/13/97 1.52 2.01 1.04 4.57 19.1 4.05
2/14/97 0 2:02 1.04 3.06 18.11 4:05
,2/1.5/97 0.301 2.02 1.04 3.361 17.16 4.311
2%1.6/97 2.19 2 1.03 5.22 18.2 4.18
,2/1,7/97 2:33 2.02 1.04 5:39 1,9:26 4.33
2/18/97 0.075 2.02 1..04 3.135 18.18 4.215
2/1,9/97 2.01 _Z 02 _ 1.04 5.07 1.9.44 3.81
2/20/97 0` -2:02 1.04 3.06 18.62 3.88
2/21/07 0.939 2.01 1.03 3.979 18.14 4.459
2/22/97 0.485 2.02 1..04 3:545 1.7.34 4.345
2/23/97 2.73 2 1.03 5.76 18.65 4.45
2/24/97:. 1.74 2.02 1.04 4.8 19.14 4.31
2/25/97 0.489 2.02 1.04 3.549 18.57 4.1.19
2/26/97 1.79 2.02 1.0.4 4.85 19.34 4.08,
2/27/97 0.631 2.03 1.04 3.701 18.94 4.101
2/28/97 0.686 2.02 1.04 3.746 18.64 4.046
Averages 1.161429 _2.018214 1.038929 #DIV/0! #DIV/0! 4.218571 18:5360.7 4.193214
Page 1
Narrative
Performance Measurements
1994/95 1995/96 1996/97 1997/98.
Miles of water mains 203 207 210 214
Reservoirs 12 12 12 13.
Fire Hydrants 1;504 1,580 1,620 1,660
Pump Stations 6 6 6 6
Meters and Services 12,846 13,325 13;9,00 14,400
Pressure Reducing Stations 12 14 14 1:5
Wells 4 4 4 4
Full Time_EquivalentPositions
1994/95 1995/96 1996/97 1997/98
Utility Manager 1.00 1.00 0.50 0.50
Operations.Manager 1.00 1.001:00 1.00
Water Operations Supervisor 1.00 1.00 1.00 1.00
• Sr Utility Worker 3.00 3.00 .3.00 3.00
Water Works Inspector 1.00 1.00 1.00 1.00
Water Quality Program Coordinator 1.00 1.00 1.00 1.00
Utility Worker II 6:00 6..00 6.100 7.00
PW Tech 1.00 1.00 1.00 1.00
Admin. Specialist 0.50
Total.Position 1 15.50 15.00 14.50 15.50
Service Level Standards
Emergency situations (i.e. water main break, wind/winter storm, storm water incident, sewer surcharge,
etc.) that occur within normal working hours, will be responded to by City staff within fifteen minutes of
notification..Emergency situations that occur after normal working hours will be responded to within
forty-five minutes after notification.
Respond to citizens inquires within twenty-four hours.
Read one half of the meters within the Water Service Area monthly.
Water meters will be installed within seven working days of purchase.
Water, sanitary sewer.and storm sewer lines to be located within forty-eight hours of notification.
• Assist in designed community events in a manner that promotes good will between the City and the
Community.
Page 2
Narrative
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•'��ti;iiii/•:i jiiv't`tivtiivti`iai;tivit{+vititi::tiiviii>.ti'iL::titiivtiii'vv$vv::i:ii2tivi�tiii+4v`:`viiiv iii`:i i~ii<M1::i[ii•`.::Lv'�vv>.ti>.v:4iiititiii?::isiit>.?i::i`i`iiiii•`.::tiiiiiv�`���Y::i":
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Program Summary: 1997/98 Goals,and Objectives:
The Water Division is responsible to the Public. Continue,to develop cooperative'agreements for our'
Works Director. The Water Division has the long term water supply needs.
responsibility to maintain,repair and expand,the:
water:system;while at the same time providing.a Construction of a 3.5 million gallon reservoir at the
dependable,watersupply at the highest quality to Menlor property.
its customers. The'Tig'ard'WaterService,Area,is
comprised of the cities of Durham, King City, two Implement and utilize the Hansen computer
thirds of Tigard and the unincorporated areas of software"program for developing a preventive
the Walnut Island and Bull Mountain (Tigard maintenance program, record keeping and the
Water District).. replacement of the.existing:inventory system.
Provide efficient and effective maintenance of the
water system.
Start a valve maintenance and,line flushing,
program.
Develop a'cooperative working relationship with
Engineering, so as to have better coordination with
projects..
1996/97 Accomplishments: Program Highlights:
Completed construction of a 8-inch water main Addition of 1 FTE to replace four part time
located on SW 130th Avenue, from SW Hawks temporary positions and enhance the abilityto start
s„
Beard to Scholls Ferry Rd. the valve maintenance-and water main flushing
programs.
Completed construction of 12-inch water main
within the_ 130th Avenue bridge project. Reservoir cleaning program utilizing divers to.clean
the reservoirs while they remain in operation.
Completed relocationof water meters and
services on SW Durham Road, due to Meter replacement program consisting of replacing
Washington County Street.Improvement project. all meters 1 1/2"and larger with meters capable of
capturing additional revenues.
Completed,relocation of water services, meters,
fire hydrants and replacment of 200 feet of&-inch
water main on SW Hall Blvd, due to Oregon
Department of Transportation improvement
project.
'Secured 4.0 million gallons of water per day from
City of Portland at,a.reduced rate._ Rate is.based
on increased purchases and this years peaking
factor.
Page 1
Murray S.md&Associates,Inc.
Enoeeglanners 121 S.W.Salmon,Suite 1020 Portland,Oregon 91204. • PHONT 503.225.9010 FAX 503.225.9022
------------------------
Washington County Supply Line Hydraulic Capacity Analysis
Project Startup Meeting
March 7, 1997
Chris Uber, Murray, Smith &Associates, Inc.
Meeting Agenda:
1.. Project Scope and Purpose
2. Water Demand Estimates and Existing Delivery Capacities
3.. Review Map, Model and Calibration.
4. Project Schedule and Next Meeting
Estimated Water Demands
Estimated water demands have been developed and are presented in Table 1. These
estimates were developed from water demand estimates presented in the Phase.2 Regional
Water.Supply Plan.
Table 1
Water Demand Estimate Summary
fiaEshmated Avera a Da and'Max�mumDa' WaterDemands m d � '
Yeair� ;Cryo Ti and ��, Co Tualatin [gall r Ci o 3C' oRaler h Water
.:M �a IMMMYSonvrlle,
Ave Max f Ave' Max ° AveIviax; Ave Iy1ax Ave Max Ave ` Max
r1995 4.7 12.2 2.1 6.7 15.2 39.4 y�1.8 5:0 0.5 1.7 0.7 1.2 �
4.7 12.3 2.1 6.8 15.4 39.9 1.8 5.0 0.5 1.8 0.7 1.2
4.7 12.5 2.1 6.9 15.5 40.5 1.9 5.1' 0.5 1.9 0.7 1.2
4.7 12.6 2.2 7.0 15.7 41.1 1.9 5.2 0.5 1.9 0.7 1.2
4.8 12.7 2.2 7.1 15.9, 41.7 1.9 5.2 0.5 2.0 0.7 1.2
2000 4.8 12.9 2.2 7.3 16.0 42.3 1.9 5.3 0.5 2.7 0.7 1.2
2001 4.8 13.0 2.3 7.4 16.1 43.7 1.9 5.4 0.5 2.2 0.7 1.2
2002 4.8 13.2 2.3 7.5 16.3 1 45.1 2.0 5.4 0.6 2.3 1 0.7 1.2
'2003 4.9 13'.3„ 2.3 7.6 1.6.5 46.5 2.0 5.5 0.6 2.3 0.7 L:2
2004: 4.9 115 2.3 7.8 16-.7 48.0 2.0 5.6 0.6 2.4 0:7 1..2
2005 4.9 13.6 2.4 7.9 16.9 49.4 2.0 5.6 0.6 2.5 0.7 1..2
2010 5.1 14.4. 2.5 8.6 17.9 49.4 2.1 6.0 0.7 3.0 0.7 1.2
Washington.County Supply Line Hydraulic Capacity Analysis
'Project Startup Meeting,
March 7, 1997
• Page 2
The estimates presented in Table 1 include average.day and maximum day demands to the
year 2010,-of for the next 13years. The Regional Water Supply Plan presented water
demand estimates in five year increments beginning in 1995. For this analysis a straight line
interpolation is assumed for the year between the five year estimates. For the purposes of
this analysis it is assumed that the Metzger area of the Tualatin Valley Water District
comprises approximately 15 percent of the District's average daily and maximum daily
demands.
Please review the estimated water demands and let me know if they accurately reflect
estimates for average day and maximum day demands for your agency.
Existing Delivery Capacities,
Portions of the Supply Line's service area can also be supplied by other existing facilities.
Northerly portions of the.Tualatin Valley Water District can be supplied:through the
Washington,'Park Pump Station Complexes. The Metzger Area of the Tualatin Valley Water.
District and the City of Tigard can be supplied through ithe Fulton
and Carolina Pump "
Stations',the Burlingame system, located in'southwest Portland. Discussions with Bureau of
• Water Works operations staff indicate the Washington Park Supply system can provide
approximately 12.0 mgd.to the Tualatin Valley Water District at the Arlington Heights
Reservoirs and approximately 8:.6 mgd through connection points in the Metzger area,
including the connection,at Bradley Corner'
The Tualatin Valley Water-,District is presently supplied through the Joint Water Commission
supply system as well. For the purposes of"this analysis it is assumed that this system will
supply the District approximately 6:0 mgd through 1998 and approximately 11.0 mgd there
after.
Hydraulic Model Development
The City of Portland developed a basic model of the Washington County Supply Line using;;
Stoner Hydraulic Analysis Software. This model of the Supply Line ends near:the
intersection of SW Beaverton-Hillsdale Hwy. and SW Oleson Road.
The existing model was expanded using Cybernet hydraulic modeling software to include the
Tualatin Valley Water District's 5.4-inch diameter supply main, the 48-inch diameter Metzger
Area and City, of Tualatin supply main and the City of Tualatin's 36=inch diameter..supply
main. The model includes the end of the Tualatin Valley Water District supply main at the
• Power Generation Station and the City of Tualatin supply main to the end of the 36-inch
diameter main in the City.of Tualatin. A digital representation of the model has been
Washington County Supply Line Hydraulic Capacity Analysis
Project Startup Meeting
March 7, 1997
•, Page 3
,prepared. The model includes.nodes representing existing and potential.points of supply to
the following entities:
1 Raleigh Water District
2. Tualatin Valley Water District (at two locations)
3. City of Tualatin
4. City of Tigard
As illustrated Sherwood and Wilsonville will be supplied through the same demand node as
the City of Tualatin.
`Model Calibration
Calibration,of the hydraulic model is presently underway using data from a number of
agencies.
Project Schedule
It:is,anticipated that the review of the estimated water demands will be completed no later
than March, 15, 1997: Following the completion of final model calibration and the receipt of
review comments concerning estimated water demands and supply capacity assumptions a
technical,memorandum summarizing the following work tasks.will be prepared:
Task 1,- Data.Gathering and Establish Existing�Conditions
Task 2 Model Development
Task 3 Model Calibration
Task 4 - Develop Base Case Scenario
It is anticipated that a draft of this first technical memorandum,will be completed by March
28, 1997. Please do not hesitate to call me at 225-9010 should you have any questions
concerning the demand estimates, model development or project schedule.