City of Asheville Capital Improvements and Risk Based Planning. April

Transcription

1 City of Asheville Capital Improvements and Risk Based Planning April

2 Introduction

3 City of Asheville Water System System Characteristics: 125,000 Customers 20.5 MGD Distribution System 3 Treatment Plants 1,670 Miles of Pipe 40 Pump Stations 32 Storage Tanks

4 City of Asheville Stormwater System System Characteristics: Population of 90,000 >35 Contributing Watersheds > 300 Miles Piping ~ 17,000 Structures

5 CIP Process Benefits Prioritize large number of projects that stretch over a long planning horizon Defensible and transparent planning process Identify and reduce risk Gain stakeholder buy-in Coordinate projects with outside agencies Brown and Caldwell 5

6 Water Utility CIP Development Process

7 CIP Development Process

8 CIP Program Overview NC DOT Projects WTP Improvements Distribution System Reliability Projects Neighborhood Water Line Enhancements Master Plan Projects

9 Replacement and Refurbishment Criteria

10 Mine Your Data SCADA GIS AIMS Asset Information Management System Maximo CMMS Munis FINANCIAL SYSTEM Brown and Caldwell 10

11 Project Development Background/History Objectives Project Description Environmental Impacts/Permitting Issues Other Agencies? Business Case Evaluation Life Cycle Costs Recommendation

12 Business Case Evaluation Define Drivers & Objectives Brainstorm Alternatives Fatal Flaw Analysis Life Cycle Cost Analysis Risk/Benefit Identification/ Qualification Net Present Value Analysis Project Solution Recommendation 12

13 CIP Prioritization

14 Stormwater Utility CIP Development

15 Stormwater Utility History Established 2005 Implemented impervious area based stormwater fee Fee increased significantly in 2014 to help address CIP needs Conducting system-wide assessment and develop 10-year CIP in 2016

16 Stormwater Assessment Overview Investigate known issues and develop potential project solutions Conduct an infrastructure criticality analysis Prioritize potential project solutions based on City and public objectives Develop Short-term and Long-Term Capital Improvement Plans Prepare a long-term watershed study prioritization plan 16

17 Identify, Investigate and Develop Solutions Identify known issues through discussion with City and public stakeholders Conduct field investigations of identified areas of concern Develop conceptual project solutions and estimated costs for inclusion in Capital Improvement Plan (CIP) 17

18 How Do We Calculate Risk? Likelihood of Failure What infrastructure characteristics indicate an increased risk of asset failure? Consequence of Failure What are the environmental, social and economic impacts of asset failure? Risk is quantified by assigning criteria to the likelihood and consequence of failure.

19 Prioritization Criteria Material Criteria Scoring 10 - Clay, Brick, Unknown 3 - PVC, Ductile Iron, Cast Iron, Concrete Pipe 1 - Reinforced Concrete, HDPE Likelihood of Failure Consequence of Failure Age/Remaining Useful Life Condition (based on known flooding areas) Future Densification Proximity of densely populated areas Proximity to Critical Facilities Proximity to Buildings Proximity to Critical Roads Pipe Diameter 10 - less than 20% remaining useful life 6 - between 41 and 60% remaining useful life 2 - between 81 and 100% remaining useful life 10 - Upstream area greater than 100 acres 0 - Upstream area less than 20 acres 10 - >3 population/acre OR Innovation District 0 - <1 pop/acre 10 - >3 population/acre OR Innovation District 0 - <1 pop/acre 10 -Within 500 ft of Critical Facility 2 - Within 2,000 ft of Critical Facility 10 - Less than or equal to 30 ft 0 - Greater than 30 ft 10 - Primary Snow Route 6 - Secondary Snow Route 2 - COA Local Roads, Subdivisions 10 - Greater than 36 inches or unknown 0 - Less than or equal to 18 inches

20 Risk Profile Determines Management Strategy High Likelihood of Asset Failure LOW RISK ZONE Strategy: Reactive Response Operate to failure MEDIUM RISK ZONE Strategy: Proactive Condition and/or Performance Monitoring HIGH RISK ZONE Strategy: Plan Risk Mitigation Through O&M Activities and CIP Prioritization Low Consequences of Asset Failure Brown and Caldwell 20

21 Criticality Model Results

22 Capital Improvement Planning and Project Development Project Planning Steps Priority (Scoring) Cost Opportunities for Collaboration Fiscal Budgeting Inclusion in CIP Project Initiation

23 Project Evaluation and Prioritization Identify Objectives Evaluate Benefits Score Projects Identified Objectives Manage and maintain the current stormwater system Proactively address public concerns regarding flooding issues Protect and improve water quality Maintain and improve public safety Provide the highest improvement benefits compared to estimated project costs

24 Project Scoring Matrix Example

25 Finalizing the Assessment Watershed Prioritization for Future Planning 25

26 Questions?