OWL Summit: City of Bend, OR Spotlight

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OWL Summit: City of Bend, OR Spotlight

  1. 1. Oregon Where is Bend?
  2. 2. How We Got Here  Population Growth  Growth Management & Urban Growth Boundaries  Past Infrastructure Project Challenges  Sewer Infrastructure Advisory Group 2
  3. 3. in the Development of the City of Bend’s Sewer Collection System Master Plan SIAG 9/24/13 US Water Alliance One Water Leadership Summit September 2013 Los Angeles, CA Community Decision Making
  4. 4. 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 4
  5. 5. WHAT’S THE PROBLEM? 5 Same 8” gravity line that River Rim & Poplar Park feed to.
  6. 6. 6 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 main shared with the Holiday Pump Station 6” force main, 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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  8. 8. FLOW PROFILE OF CRITICAL MANHOLE 8
  9. 9. 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 9
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  11. 11. WHAT HAPPENED NEXT 11 2875
  12. 12. COMMUNITY INVITED TO HELP SOLVE THE PROBLEMS  Sewer Infrastructure Advisory Group: – 17-member citizen committee – Appointed by Bend City Council – Advise master planning 12
  13. 13. 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 13 “The Council desires to engage in a more comprehensive planning process for its wastewater collection system…” —Resolution 2875
  14. 14. 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 14
  15. 15. 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 15
  16. 16. PROJECT SCHEDULE 16
  17. 17. MASTER PLANNING WITH EVERYONE INVOLVED 17 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
  18. 18. HOW DOES OPTIMIZATION WORK? 18
  19. 19. OPPORTUNITIES FOR SIAG INVOLVEMENT 19
  20. 20. 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 20
  21. 21. 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? 21
  22. 22. HOW ARE THINGS GOING? 22
  23. 23. Questions 23

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