San Francisco s Urban Watershed Framework: A Decision Making Process to Support Multi-Benefit Wastewater and Stormwater Projects September 26, 2011

Transcription

1 San Francisco s Urban Watershed Framework: A Decision Making Process to Support Multi-Benefit Wastewater and Stormwater Projects September 26, 2011 Karen Kubick, P.E., SSIP Program Director, SFPUC Randy Raines, President, RMC Water and Environment

2 San Francisco s Watersheds Westside Bayside 2

3 San Francisco s Wastewater Facilities

4 Combined Sewer System

5 Challenges for the SSIP are Numerous Seismic Reliability Aging Infrastructure Combined Sewer Discharges to the Bay and Ocean Rising Sea Level Environmental Justice Flooding Odors, Noise, and Visual Future Regulatory Changes Environmental Stewardship Operational Reliability Flooding at SF State

6 Commission Endorsed Levels of Service July 27, Provide a Compliant, Reliable, Resilient, and Flexible System that can Respond to Catastrophic Events 2. Minimize Flooding 3. Provide Benefits to Impacted Communities 4. Modify the System to Adapt to Climate Change 5. Achieve Economic and Environmental Sustainability

7 North Point Facility Upgrades Collection System Improvements, Flood Control and Low Impact Design Collection System Odor Control Outfall Rehabilitation Backflow Prevention Oceanside Treatment Plant Upgrades Central Bayside System Improvement Projects Southeast Treatment Plant Upgrades Biosolids Digester Facility Proposed Treatment and Collection System Projects

8 SSIP Proposed Projects $6.9B (Program Cost) Project Cost Estimate ($ Millions) Minimize Flooding Provide Benefits to Impacted Communities Modify the System to Adapt to Climate Change Achieve Economic and Environmental Sustainability Treatment Biosolids Digester Project $2,291 X X X Treatment Plant Improvements $579 X X X Southeast Treatment Plant Improvements $1,069 X X X Treatment subtotal $3,939 Collection System Collection System Improvements $519 X X X X Flood Control Improvements $1,119 X X X X Central Bayside System Improvements $1,093 X X X X Collection System subtotal $2,731 City Program Management & Asset Management Planning $170 Program Management Contract $150 TOTAL PROPOSED SSIP $6,990

9 Proposed SSIP Timeline

10 Triple Bottom Line-Plus Analysis To bring transparency to the decision-making process for grey and green infrastructure Social People Primary Focus Improved Stormwater Management Technical/ Functional Economic Prosperity Environmental Benefits/Protection

11 SFPUC has developed an Urban Watershed Framework Approach 1. Establish Objectives 2. Watershed Assessments 3. Alternatives Development 4. Alternatives Evaluation Implementation Strategies Stakeholder Involvement

12 Triple Bottom Line + Urban Watershed Framework = A New Way of Doing Business for San Francisco Establish Objectives Watershed Assessments Alternatives Development Alternatives Evaluation Implementation Strategies Stakeholder Involvement Using Triple Bottom Line-Plus Analysis Social People Technical/ Functional Economic Prosperity Environmental Benefits/Protection 12

13 1. Establish Objectives & + SFPUC s Endorsed Goals and Levels of Service for the Wastewater Enterprise

14 2. Watershed Assessments Identify Needs and Opportunities Needs are the gaps between watershed objectives and existing conditions Opportunities are ways to achieve multiple benefits while meeting watershed objectives

15 3. Alternatives Groups of Project Development Alternatives Identify applicable strategies for each specific watershed Combine complementary strategies into project alternatives Verify performance feasibility of project alternatives Alt 1 Alt 2 Hydraulic Performance Constructability Lifecycle Costs Alt 3

16 Types of Project Alternatives CONVEYANCE Examples: Auxiliary Sewer Pipes, Creek Daylighting STORAGE Examples: Streetscape Bioretention Planters, Underground Detention Basins REUSE Examples: Rainwater Harvesting, Graywater Reuse RUNOFF REDUCTION Examples: Permeable Paving, Rain Gardens ODOR CONTROL Examples: Sewer Cleaning and Flushing, Fat, Oil, and Grease (FOG) Collection CLIMATE CHANGE ADAPTATION Examples: Accommodation of Sea Level Rise within the service life of new Infrastructure, Raising CSD Weirs

17 4. Alternatives Evaluation Solicit Stakeholder Input Confirm Evaluation Criteria Weightings Score Project Alternatives Select Top- Ranking Alternatives for Further Evaluation Neighborhood/ community-scale workshops Focused Stakeholder Groups SFPUC Presentation of preliminary results

18 Rank Project Alternatives by Performance Performance of Alternative in Meeting Supporting Objectives 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 9% 10% 19% 18% 21% 25% 27% 26% 30% Top ranking alternatives will be selected for Benefit/Cost Analysis Social Environmental Economic Alt 1 Alt 2 Alt 3

19 Monetize Benefits and Costs of Top-Ranking Alternatives Calculate total benefits of topranking alternatives Calculate total costs of alternatives Divide Total Benefits by Total Costs Rank Project Alternatives by B/C Ratios SFPUC Presentation of B/C analyses to focused stakeholder group(s) and neighborhood groups

20 Triple Bottom Line Benefit/Cost Analysis $ Flood Damage Reduction $ Jobs Created $ Rate Stability Benefits Economic Costs Economic $ Life Cycle Costs $ Improved Aesthetics $ Reduced Beach Postings Social Social $ Construction Disruption $ Habitat Enhancement Environmental Environmental $ Greenhouse Gas Emissions $ B $ C

21 Compare Project Alternatives Benefits Against Costs Benefit/Cost Value ($) Cost>Benefit Cost=Benefit Benefit>Cost Total Cost Total Benefit 0 Alt 1 Alt 2 Alt 3

22 Implementation Strategies Validate Program Define Performance Metrics Build and Maintain Transparency & Accountability with the Public Employ an Adaptive Process Prioritize Capital Implementation

23 Thank You