owl summit: city of bend, or spotlight
TRANSCRIPT
Oregon
Where is Bend?
How We Got Here
Population Growth Growth Management & Urban
Growth Boundaries Past Infrastructure Project
Challenges Sewer Infrastructure Advisory Group
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in the Development of the City of Bend’s
Sewer Collection System Master Plan
SIAG
9/24/13
US Water AllianceOne Water Leadership Summit
September 2013 Los Angeles, CA
Community Decision Making
INTRODUCING THE CITY OF BEND’S WASTEWATER COLLECTION SYSTEM
430 miles of sewer mains 90 sewer pumping stations 246 home pumping stations System contains 4 different types of
collection infrastructure Collect 6.0 million gallons per day
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WHAT’S THE PROBLEM?
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Same 8” gravity line that River Rim &
Poplar Park feed to.
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EMPIRE ESTATES, GLEN VISTA, NORTH FIRE STATION, RIM ROCK #1 #2 #4 & #5, RIM ROCK RIDERS, RIVERS EDGE,
IVERHOUSE, SAWYER PARK, SERVICE STATION, WYNDEMERE SHARED FORCE MAIN CONNECTIONS
Known Issues:
• 5” force main discharges into 8” gravity mainshared with the Holiday Pump Station 6” forcemain, causing severe surcharging issues.
• Odor complaints have been received at the
gravity sewer leading into the Wyndemere Pump Station
Same 8” line
Holiday and
Highland feed to.
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FLOW PROFILE OF CRITICAL MANHOLE
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MASTER PLANNING - TAKE 1
Recommendation: shift to gravity conveyance
Major interceptors to reduce demand on city core
Intent was on alleviating problem areas
Capacity issues addressed
Improved access for unsewered areas
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>$180 Million
WHAT HAPPENED NEXT
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2875
COMMUNITY INVITED TO HELP SOLVE THE PROBLEMS
Sewer Infrastructure Advisory Group: – 17-member citizen
committee– Appointed by Bend
City Council– Advise master
planning
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THE ASSIGNMENT
Develop “affordable” collection system capital improvements for existing UGB
Provide flexibility to accommodate long term growth
Build comprehensive hydraulic model from updated GIS data
Collect dry and wet weather flow monitoring
Calibrate the hydraulic model Incorporate system condition
information into the overall analysis
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“The Council desires to
engage in a more
comprehensive planning process
for its wastewater collection system…”
—Resolution 2875
THE ASSIGNMENT CONT.
Identify suite of immediate term solutions before all analysis tools are fully developed
Ensure those immediate term solutions support long term solutions
Consider a wide range of improvement concepts and options, including previously recommended solutions as well as new, innovative ideas
Utilize a formalized optimization process that evaluates full life cycle costs
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CHALLENGES
Some projects from original master plan already underway
Immediate solutions needed for several priority areas to allow growth to continue
High level of community involvement / public interest / scrutiny
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PROJECT SCHEDULE
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MASTER PLANNINGWITH EVERYONE INVOLVED
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Traditional Master Planning
Bend’s Master Plan
Focus on engineering solutions
Focus on community values, then engineering solutions
Planning assumptions taken at face-value
Every assumption scrutinized
Solution set limited Solution set expanded
Day-to-day approvers: City Staff
Approvers: community members / City Staff / City Council
No special decision making modeling
Optimization Modeling
HOW DOES OPTIMIZATION WORK?
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OPPORTUNITIES FOR SIAG INVOLVEMENT
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OPTIMIZATION BENEFITS
Ability to evaluate thousands of possible options– Transparent – Identifies lowest life cycle cost solutions– Identifies only solutions that provide capacity
Unbiased when compared to traditional planning methods
Opportunity to look for savings and prioritize investment
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SEWER INFRASTRUCTURE ADVISORY COMMITTEE
How is this different from other committee panels?– Depth of involvement– Scope of decision making– Amount of investment– Selection of diverse members
Where are we now?
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HOW ARE THINGS GOING?
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Questions
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Goal < $100 Million