09/30/1998 - Packet PUBLIC BOOK COPY
INTERGOVERNMENTAL WATER BOARD MEETING
Serving 7-igard, King City, Durham and Unincorporated Area
AGENDA
Wednesday, September 30, 1998
5:30 p.m.
1. Call to Order
2. Roll Call and Introductions
3. Long Term Water Supply Update - Ed Wegner
4. Visitors Comments
5. Non Agenda Items
6. Adjournment
Executive Session: The Intergovernmental Water Board may go into Executive
Session under the.provisions of ORS 192.660 (1) (d), (e), & (h) to discuss labor
relations, real property transactions, and current and pending litigation issues. All
discussions within this session are confidential; therefore nothing from this meeting
may be disclosed by those present. Representatives of the news media are allowed
to attend this session, but must not disclose any information discussed during this
session.
* A light dinner will be served 5:00 p.m.
kathyMwb\9-30.agn
09/21/98 MON 12:34 FA.X 503 682 1015 CITY OF WILSONVI 001
30000 SW awn Center loop E
W*WrAe, Oregon 97070
CVY d 003)682-1011
WI.LSONVILLE (503)682-1015 Fc«
in OREGON (503)682-0843 TDD
September 21, 1998
TO: Ed Wegner Lee'Wdeislogel
Dirk Borges Dale Jutila
Ron Patch Mire McKillip
Jesse Lowman TWO PAGES
FROM: Dave Kanner
RE: Wilsonville Water Survey
I would like to Clarify a few misimpression with which you may have been left after
reading Kevin Hanwaay's September 18 memo about Wilsonville's recent water survey. I
would appreciate it if you would share this memo with anyone who received Kevin's
earlier memo.
Wilsonville"s situsfion is substantially different than that of other jurisdictions. Weare
aware of the critical importance of HOW the decision will be made. However,we are in
the midst of a development moratorium and our City Council is being forced to select a
water supply option in order to comply with the requirement of the state moratorium
statute that we develop a plan of correction. This emphasizes the need for a dialogue
with our constituents over WHAT our future water supply will be. In additioz,we heard
overwhelming testimony in opposition to the Willamette River at a June 1 public hearing
at which the Council was also presented with a petition signed by more than 700 people
expressing opposition to the Willamette. The Council has a legitimate interest in
deterrniaing whether this testimony and the petition truly represent majority commtuuty
sentitnent. Clearly,the Council's interest is to ensure a safe and reliable long-term water
supply that is both technically feasible and acceptable to the public.
While the survey was initially written by city staff,the questions were reviewed by Davis
&Hibbitts for proper triangulation and to ensure that they were free of bias. The
questions were developed with the active input of our City Council,which was faced
with apparently conflicting information from our February survey and the input received
at the June public hearing, Indeed, the message of these two stir veys may well be that
voters are conflicted about'what they want.
The survey was conducted by mail not to save money,but because some of the key
questions in the survey were simply too long to be asked on the phone. Danis&Hibbitts
agreed that given the length and complexity of the questions,it was preferable to do the
survey by mail. Though not as reliable as a phone survey,it is a statistically valid
sampling of voter opinion.
4I '5er1.4rg Thp
00,'21%98 MON 12:35 FAX 503 682 1015 CITY OF WILSONVILLE 1A 002
Kevin is correct that the survey asked voters to select among various water supply
options"based on what you know about'Wilsonville,$water supply issues and using your
best judgment." It provided us with baseline information to use in our public information
Planning and for follow-up surveys that we will conduct after we have more information
about each of the options.
Our recent survey is but a step that brings us closer to reaching our goal of providing a
safe and reliable long-tern,water supply. Let"s not lose sight of that goal.
cc: Kevin Hanway
Brian Bell
Keely McArdle
Adam Davis
From: "Mike Miller" <MIKE.COT>
To: ED.COT
Date sent: Fri, 25 Sep 199817:10:57 -0700
Subject: Colored Water Calls
Send reply to: mike@ci.tigard.or.us
Copies to: KATHYK.COT, ERIC.COT, SAMM.COT, RICHARD.COT
Ed ai
-
We're beginning to get more customer calls than normal related
to colored water. We have been in contact with Mark Knudson at
Portland Water and they too have been receiving more calls than
normal. Portland indicates that this is due to the fact that they
have been taking water from a lower level (water column) in reservoir
1 in the Bull Run. Portland also indicates that this is a very
"common phenomenon" for this time of year. That drawing water from
these lower levels is necessary due to the ongoing drawdown of the
reservoir.
The color that we are seeing is typically a "yellowish" or weak tea,
and is the result of naturally occurring dissolved organic matter that
are more concentrated at the lower levels of the reservoir. The
color, while an aesthetic concern, does not present any health
concerns. We and Portland contiue to be well within standards for
turbidity and bacteriological quality. Unfortunately, since Portland
does not have a filtration plant, there is little that they can do
about the problem. Portland continues to monitor the water quality at
all of the levels of the reservoir and make adjustments as needed to
get the best water quality available.
This color should not be confused with the "leaf tea" color that is
associated with the leaf drop in the Fall. This will occur later this
Fall and is due rain, more than just the recent showers, leaching
organics from fallen leaves.
It looks like it will be a long Fall, at least for water quality from
the Bull Run.
Mike
Ed Wegner -- 1 -- Mon, 28 Sep 1998 13:07:11
Davis '& Hibbitts; Inc.
Market and Public Opinion Research
921 S.W. Morrison, Suite 424, Portland, OR 97205
Phone (503) 220-0575, FAX 220-0576-
e-mail: davishib®fta.com
September 8, 1998
TO: Brian Bell, Rockey Bowler
FROM: Davis&11ibbitts, Inc.
RE: Tigard Water District Survey Results
L Introduction
Davis&Hibbitts, Inc. (DHI)is pleased to present the results of a telephone survey conducted
during August to assist the City of Tigard in planning for its fixture water supply:.The sample size
for the survey was 305, and the respondents were randomly drawn from among registered voters
in the Tigard Water District.
Description of Sample As will be noted in the accompanying tables, a substantial quantity of
demographic data was collected during the survey. This enabled various comparisons to be made
in each major,question area. Major characteristics of the sample were as follows:
(a)The sample was 50%female and 50%male.
(b)Age was grouped into three categories. Eleven percent(I I%)fell in the 18-34 range, 43%
were ages 35-59, and 46%were age 60 and over.
(c) Forty-four percent(44%)lived in the Tigard Water District area for 10 years or less, 23%for
11 to 20 years, and 34%for more than 20 years.
(d)Income was grouped into four categories. Twenty-three percent (23%)reported incomes
under$30,000, 16%fell in the.$30-45,000 range, 33%fell in the$45-75,000 range, and 29%
earned$75,000 or more.
(e)Eighty-four percent(84%)of the sample were homeowners, and 16%were renters.
(f)Twenty-eight percent(28%)of the respondents had children under age 18 living at home,
while 72%were without children.
Questionnaire. A copy of the questionnaire is,attached as an Appendix In gathering the
responses, DHI employed quality control measures which included questionnaire pretesting,
callbacks, and verification. The substantive areas of questioning included water supply problem
and knowledge level, water supply options, and advice to the city council. Each is discussed in a
1
separate section below. This report will highlight noteworthy outcomes. Numerical results were
analyzed by frequency of response for categorical-format data and by comparing means for
scaled-format data. Beyond this, only subgroup variations which appeared useful for planning and
policy-making purposes are discussed
Statement of Limitations. Any sampling of opinions or attitudes is subject to a margin of error,
which represents the difference between a sample of a given population and the total population
(here, Tigard Water District area). For a sample size of 305,if the respondents answered a
particular question in the proportion of 90%one way and 10%the other,the margin of error
would be+/- 3.37%. If they answered 50%each way,the margin would be+/- 5.61%. The
reason for the difference lies in the fact that when response categories are relatively even in size,
each is numerically smaller and thus slightly less able- on a statistical basis- to approximate the
larger population.
These plus-minus error margins represent differences between the sample and total population at a
confidence interval, or probability, calculated to be 95%. This means that there is a 95%
probability that the sample taken for this study would fall within the stated margins of error if
compared with the results achieved from surveying the entire target population.
IL Water Supply Problem and Knowledge Level
Respondents were asked if they believed that Tigard currently has, or will have in the near future,
a water supply problem Forty-six percent(46%) said yes, 14%said no, and 40%were unsure or
did not respond(Table 1). Respondents age 35 to 59 (45%)and 60+(51%) said yes more than
respondents age 18 to 34(27%). Homeowners, as compared to renters, were also more likely to
believe that Tigard had a water supply problem(49%to 34%).
The 140 respondents who believed Tigard had a water supply problem were asked to rate its
seriousness, and 19%chose very serious, 66% somewhat serious, 8% chose not very serious, 2%
said not at all serious, and 5%were unsure or did not respond(Table 2). When these results were
collapsed into the categories of"serious"or`dot serious,"the outcome was an 85%to 10%
leaning towards the former. On a scale where loot at all serious to 4--very serious, the mean of
3.07 reflects a somewhat serious orientation. There were no subgroup interactions.
All respondents were informed that Tigard does need a new water supply for the future and were
asked if they had heard or read about plans for 11gard's future water supply. Fifty-five percent
(55%)said yes, 44%chose no, and 2%were unsure or did not respond(Table 3). The older the
respondent,the more likely they knew of Tigard's water supply problem(39%, 49%, and 64% for
each ascending age group).
III. Water Supply Options- General
Respondents were read a list of eight items that have been suggested as considerations in
assessing options for Tigard's future water supply and were asked_if the list is a good or poor one.
2
- r
SELECTING TIGARD'S LONG -
TERM
WATER SUPPLY SOURCE
TENTATIVE PROCESS FOR DECISION MAKING
- • • :
Water Rights Water Quality
Review CriteriaF
Opportunity for City • • Water Supply Agreements
Ownership of Supply System & Contract Provisions
Receive
Reports on Portland
Estimated Cost of Water =Willamette Options Certainty of Supply
1999 ANEW
Supply
Implementation Timing Required Improvements
& Estimated Project Costs
FinalAPRIL, 1999
Water Source
Selection
PORTLAND WATER BUREAU
COMBINED SOUTH SHORE WELLFIELD ,- BULL RUN
TREATMENT SYSTEM OPTION
Im �� STE P FINISHED
DISINFECTION - RESIDUAL DISINFECTION - SAFE, RELIABLE,
WATER TREATMENT WATER TREATMENT HIGH-QUALITY
DRINKING WATER
Purpose V Purpose V
Destroy(oxidize) microbial contaminants in reservoir Prevents the growth of bacteria and other microbes At your tap,treated and unfiltered water from the
or wellfield water. while the water travels to your tap. combined Portland South Shore wellfield and Bull Run
system surpasses all current water quality standards
Technology V Technology♦ established by the EPA.
Chlorine and ammonia is injected into the water line. Additional chlorine is added to the water before it
travels as far as 45 miles through pipes.
Water6Quality Results V
• Removes coliform bacteria,viruses,Giardia and other WatewQuality Results Turbidity
(measure of cloudiness)
microbial pathogens. ■ Chemical reactions between chlorine and organic 0.54
+ Chlorine has little effect on eliminating materials produce disinfection byproducts.
Disinfection
Cryptosporidium; Byproducts:
■ Absence of settling process means organic materials THM
stay in the water,which results in coloration,odor 16 ppb.
and tastes some customers find objectionable;and HAA
■ Chemical reactions between chlorine and organic 15 ppb.
materials produce disinfection byproducts.
WATER FILTRATION & TREATMENT SYSTEM
WILLAMETTE RIVER OPTION
STEP STEP STEP STEP FINISHED
PRE-DISINFECTION SETTLING PROCESS FILTERING PROCESS WITH RESIDUAL DISINFECTION SAFE,RELIABLE,
WATER TREATMENT (Sedimentation & Flocculation) GRANULAR ACTIVATED WATER TREATMENT HIGH-QUALITY
WATER FILTRATION CARBON DRINKING WATER
Purpose V Purpose V Purpose V Purpose V At your tap,filtered and treated
Destroy(oxidize) microbial Remove particles,sediment and Removes remaining particles, Protect treated water as it is water from the Willamette River
contaminants in river water. organic materials from water. organic material and dissolved delivered to customer's tap. treatment facility surpasses all
chemicals from water after the current and anticipated water
Technology V Technology V settling process. Technology V quality standards established by
the EPA.
Ozone gas(a powerful disinfectant) Treatment chemicals added to A trace of chlorine or a chlorine-
is bubbled through water. the water promote clumping.The Technology V ammonia compound is added to
water then gently flows through a Water runs through a filtration the water before it leaves the plant.
Water,Quality Results V series of settling tanks. bed consisting of a 5-foot granular
■ Effectively destroys microbial activation carbon layer(a fine- Water-Quality Results V
Water-Quality Results grained,charcoal-like,extremely
contaminants; Q ty � ■ Prevents the growth of bacteria Turbidity
■ Removes most organic porous material)and a 10 sand and other microbes while the (measure of cloudiness)
■ Eliminates algae-related tastes Iayer.This 2-layer cleansing bed is less than .01
and odors; materials; the bests stem available toda for water travels to your tap.
Y Y Disinfection
■ Much more effective for ■ Important for cyst removal;and removing chemicals from water. Byproducts:
Crytosporidium and Giardia ■ Provides some reduction of THM
removal than chlorine;and organic chemicals. Water6Quality Results V 5-10 ppb.
HAA
■ Reduces risk from hazardous ■ Removes more than 99%of 5-10 ppb.
disinfection byproducts. sediment and organic materials; Organic Chemicals:
■ Provides some reduction of • Effectively removes dissolved None Detected
organic chemicals. chemicals;
■ Eliminates tastes and odors;and
■ Provides final barrier to cysts.
Natural Organic Material Reacts with Synthetic Organics in Untreated Willamette
Chlorine to From Disinfection Byproducts Comparable to Other Local Sources
•same toxicity and carcinogenicity as synthetic *Willamette River:
organic chemicals atrazine,DEHP
trihalomethanes&haloacetic acids Barriers=ozone+GAC for 99.9%removal
•linked to birth defects *Portland groundwater:
•predicted Willamette River DBP's lowest in region tetrachloroethene,trichloroethene
*Willamette= 5-15 ug/L Barriers=none
•Tualatin River:
•Bull Run = 20-40 tzg/L di-n-butylphtalate,methylene chloride
•Mollala, Clackamas, Tualatin= 20-40 ug/L Barriers=none
Cryptosporidium Risk Will Be Lowest of All Ozone/GAC Treatment Recommended Based
Sources in Region on What Might Be Present
*national source water average= 100 cysts/L *ozone strongest disinfectant
*Willamette River= 1-10 cysts/L •process designed to remove high levels of
*comparable to Bull Run, Clackamas, Seattle organics, even though no evidence of need to date
•Willamette treatment has 2 strong barriers to *no chlorine byproducts generated
Crypto: ozone+ GAC filtration *process anticipates next generation of regulation
*Bull Run has no barriers at present •continually more stringent regulations drive
•Clackamas, Tualatin, Mollala have one barrier: technology
filtration
t-
I
September 24, 1998
What Is a "Home Run" Anyway?
By the time this is published (September 24), the regular baseball season will be almost over. So, it seems like
a good time to talk about home runs, since the subject has engaged so many people during the last few months.
A baseball home run is pretty easily defined, and I assume we all know what one is. On the other hand, we refer
to various successes as "home runs." Exceptional performance is oftentimes referred to in that way. This column
is about a major accomplishment of the Water Bureau, namely our ability to provide our customers a high
quality service and product at an extremely competitive. affordable and fair price.
The following is a table found in our current Financial Plan. It compares the average bill paid by a residential
customer of the Water Bureau with the bill for the same amount of water from other cities and Water Districts
in the metropolitan area. Check it out. we're the lowest!
Residential Residential
Monthly Bill Monthly Bill
Local Utilities (effective date) (for 800 cubic feet) (for 1,000 cubic feet)
Portland,City of(July 1,1998) $13.05 $14.89
Powell Valley Road Water District(1994) 13.10 15.10
Lake Oswego,City of(1 1997) 14.44 15.68
Clackamas River Water-North(February, 1998) 13.70 16.00
Rockwood Water District(July 1998) 13.70 16.00
Milwaukie,City of(1997) 13.78 16.48
Tigard,City of 14.12 16.76
Tualatin Valley Water District 15.13 17.63
Tualatin.City of 16.90 19.40
West Slope Water District(July, 1998) 17.00 20.00
Gresham.Cite of(January 1998) 18.38 20.66
Beaverton.Citv of(August, 1998) 20.95 21.37
To my Vva yof thinking, this is one for the records books — sort of an organizational Home Rim.
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1996 2000 2005 ' 2010 2015 20,20 ! 2025 20Cio ! 2035 2040 2046 '2060 t
YEAR
CRY CP 71GARD WATER SUPPUE8
• CITY OWNED SUPPLY
CITY OF TIGARD GROUNDWATER WELLS
-Wells draw from Buil Mountain critical groundwater area.
- Supply continued on a year to year basis.
• SURPLUS SUPPLIES
CITY OF PORTLAND BRADLEY CORNER CONNECTION
- E�dsting contract for water supply from City of Portland expires in 2007.
-Actual supply capacity of connection will decline as Portland facilities are used
to meet southwest Portland's Increasing water demands.
TUALATIN VALLEY WATER DISTRICT BAYLOR STREET CONNECTION
- Existing contract for water supply from Tualatin Valley Water District expires
In 2003.
LAKE OSWEGO BONITA ROAD CONNECTION
-Contract for water supply from City of Lake Oswego Is on a year to year basis.
- Supply typically not available on peak water use days.
SUIMUSER 1998
EXISTING WATER SUPPLIES
AND PROJECTED WATER
DEMANDS
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