1. Oregon
Where is Bend?

2. How We Got Here
 Population Growth
 Growth Management & Urban Growth
Boundaries
 Past Infrastructure Project Challenges
 Sewer Infrastructure Advisory Group
2

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. 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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5. WHAT’S THE PROBLEM?
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Same 8” gravity line
that River Rim &
Poplar Park feed to.

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.

7. 7

8. FLOW PROFILE OF CRITICAL MANHOLE
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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

10. 10

11. WHAT HAPPENED NEXT
11
2875

12. 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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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
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“The Council
desires to engage
in a more
comprehensive
planning process
for its wastewater
collection
system…”
—Resolution 2875

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
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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. PROJECT SCHEDULE
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17. MASTER PLANNING
WITH 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

18. HOW DOES OPTIMIZATION WORK?
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19. OPPORTUNITIES FOR SIAG INVOLVEMENT
19

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
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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?
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22. HOW ARE THINGS GOING?
22

23. Questions
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