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