02/08/2017 - Minutes Intergovernmental Water Board JWB) Minutes
SERVING TIGARD,KING CITY,DURHAM AND TIGARD WATER DISTRICT
MEETING DATE: Wednesday, February 8, 2017, 5:30 p.m.
MEETING LOCATION: Tigard Public Works Building
8777 SW Burnham Street
Tigard, OR 97223
Members Present:
Ken Henschel Representing the Tigard Water District (TWD)
Keith Jehnke Representing the City of Durham
Chi Nguyen-Ventura Representing the City of King City
Jodie Inman Member-At-Large
Members Absent:
Marc Woodard Representing the City of Tigard
City of Tigard Staff Present:
Brian Rager Public Works Director
John Goodrich Division Manager
Dennis Koellermeier DK Advisory&Associates
Lexi Hallum IWB Recorder
1. Call to Order, Roll Call and Introductions
Commissioner Henschel called the meeting to order at 5:35 p.m.
Commissioner Henschel reported that Commissioner Rue will no longer serve as
representative of the City of King City and introduced Commissioner Nguyen-Ventura,
who will be the new representative.
2. Approval of Minutes — October 12, 2016
Commissioner Henschel moved to approve the minutes, Commissioner Jehnke seconded
the motion. The motion passed by unanimous vote of the commissioners present, with
Commissioners Henschel,Jehnke, Inman, and Nguyen-Ventura voting yes.
3. Public Comments
There were no public comments.
4. Water Supply Update
Mr. Goodrich reported:
• Average water use for the months of January and February was 4.1 million gallons
per day (mgd). This usage is typical for this time of year, but lower than our 10-year
averages, and slightly higher than last year this time.
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• In the months January and February, Aquifer Storage Recovery (ASR-1) pumping
was 16 million gallons and ASR-2 pumping was 3 million gallons. During a water
treatment plant shut down in January,ASR was used to supplement normal water
demand. Stored water for ASR-1 is approximately 53 days of supply based on 1,000
gallons per minute (gpm) recovery rates. ASR-2 has 81 days of supply based on 1,500
gpm recovery rates.
• A few water quality problems have been reported by customers, mostly chlorine taste
and odor. Field staff continue to flush dead end lines to improve water quality as an
effective tool. Water quality has been very consistent from the water treatment plant
based on monitoring at Bonita Pump Station.
• Ozone feed system construction continues at the water treatment plant, though the
recent very cold weather did hamper construction efforts. The plant is scheduled to
do functional testing of the ozone chemical feed equipment in late March or early
April.
• Cryptosporidium detections in Portland drinking water sources, is a recent topic in
the news media, including information regarding the City of Portland, unfiltered
drinking water, and their water source, Bull Run Lake. Our staff has not received any
calls from customers. Lake Oswego and Tigard area customers are not affected,
except those Tigard residents served by Tualatin Valley Water District. The Lake
Oswego-Tigard Water Treatment Plant fully treats source water to remove or destroy
cryptosporidium pathogens. Ozone will provide additional protection in destroying
pathogens, including cryptosporidium.
Commissioner Henschel commented that some resident in the area of 139th and 141St
reported their water tastes like chlorine to Commissioner Henschel, but they did not
report this to the City of Tigard.
Mr. Goodrich reported that the chlorine impart tastes that will be normal compared to
the past water source, and that for those customers reporting strong chlorine taste,
flushing is the appropriate tool to respond. He explained that the residual chlorine has
been cut back and explained technical aspects of the water treatment plant:
• Watcr quality from the plant into the Bonita Pump Station has been consistent
with good pH and chlorine residuals at around 1 part per million.
• Contact Time (CT) values, which is a disinfection treatment requirement, are
affected by plant production (volume of water treated), water temperature (cold
water slows disinfection), and the amount of chlorine added.
• Ozone chemical addition will be enhancing water quality by reducing or
eliminating taste and odor organic compounds normally found in water sources.
5. Long-Term Water Supply Planning—Willamette River Water Coalition (WRWC)
Update- Brian Rager and John Goodrich
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Mr. Rager referred to the handouts in the IWB packet which explained that the City of
Tigard had the opportunity to buy into the Willamette River Intake and Raw Water
Pump Station (Intake Structure). All handouts are on file in the IWB meeting record.
Mr. Koellermeier summarized the handouts for the IWB:
• Of the six parties involved in the Willamette Intake Structure; City of Tigard, City
of Hillsboro, City of Wilsonville, Tualatin Valley Water District (TVWD), City of
Beaverton, and City of Sherwood - TVWD and the City of Wilsonville had made
all the initial investments in the Willamette Intake Structure 20 years ago.
• TVWD owned the bulk of the capacity and the improvements that were made to
the structure.
• TVWD and the City of Hillsboro concluded it was a good time for the other four
partners to get involved with the Willamette Intake Structure. The City of Tigard
was given a "one-time offer to buy-in" option with an "expire date", or risk their
share being allocated to someone else.
• The City of Tigard may receive 13-15 million gallons per day (mgd) as it's
allocated share of this large intake structure (up to 150 mgd) depending on the
final engineering analysis of flow characteristics of the structure.
• The council, based on the information provided, believed it to be a good
investment for development of a future water supply source. The city holds
Willamette River water rights for approximately 25 mgd through its membership
in the Willamette River Water Coalition.
Mr. Goodrich noted that the technical memo provided within the handout was outdated.
The memo was commissioned to review the two options of providing water supply from the
Willamette River. As of this date, one option presented in the memo with regards to
participating as a full partner in the Willamette Water Supply Project (TVWD and City of
Hillsboro) is no longer an option since all of the design work has been completed.
Based on the information provided by staff during past board meetings, Commissioners
Inman and Henschel made comment that they would like to see communications between
the city and the IWB improve.
7. Informational Items
There were no informational items.
8. Non-Agenda Items
Mr. Goodrich will update the current board member roster.
9. Next Meeting
March 8, 2017, at 5:30 p.m.
Public Works Auditorium, 8777 SW Burnham Street Tigard, Oregon.
10. Adjournment
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At 6:12 p.m. Commissioner Nguyen-Ventura moved to adjourn the meeting.
Commissioner Jehnke seconded the motion. The meeting adjourned by unanimous vote
of the commissioners present,with Commissioners Henschel,Jehnke, Inman, and
Nguyen-Ventura voting yes.
Ken Henschel, IW/B� Chair Lexi I la lum, IVB Recorder
Date: '`// / � Date: �J
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