Getting Started with Stormwater Asset Management

Transcription

1 Getting Started with Stormwater Asset Management Fall Conference Broken Arrow, OK September 17, 2018 Trey Shanks CFM, IAM, PACP

2 Asset management roadmap STEP 4 Risk Based Analysis STEP 3 Establishment of Levels of Service STEP 2 Condition & Criticality Scoring STEP 5 Business Case for Projects/Activities STEP 6 CIP Forecast & O&M Strategies in reverse STEP 1 Asset Inventory & Data Gathering How am I going to fund needed improvements? How much do the improvements cost? What improvements are needed? What is the goal performance of the assets? What is the current condition of the assets? What are the assets?

3 Asset Management Balance Cost 3

4 Asset Manager Responsibility Council Senior Mgmt Options Cost Risk implications City goals Targets Risk appetite Cost Storm System Mgmt 4

5 Asset Management Model

6 Asset Management Subject Groups

7 Stormwater Management 8

8 Asset Management Maturity Assessment

9 Building an Asset Management Program STEP 6 What is our current system? STEP 4 STEP 5 Business Case for Projects/Activities CIP Forecast & O&M Strategies STEP 3 Risk Based Analysis STEP 1 STEP 2 Condition & Criticality Scoring Establishment of Levels of Service Asset Inventory & Data Gathering 10

10 Storm System Features Asset Inventory & Data Gathering

11 Field Inventory Asset Inventory & Data Gathering 12

12 Water Quality Compliance Asset Inventory & Data Gathering Inventory Streams Outfalls 13

13 Water Quality Compliance, Maintenance Asset Inventory & Data Gathering Inventory Streams Outfalls Drainage Network Asset Condition 14

14 Water Quality Compliance, Maintenance, CIP Asset Inventory & Data Gathering Inventory Streams Outfalls Drainage Network Asset Condition Size and Material Invert Elevations 15

15 Asset Size Asset Inventory & Data Gathering 16

16 Asset Material Grassed Rock, stone, gravel Concrete Asset Inventory & Data Gathering 17

17 Asset Condition Good Fair Poor Condition & Criticality Scoring 18

18 Assigning Pipe Condition Score Grade Description PACP* Defects A- Very Good Mild Defects Crack, Surface Roughness Increased, Aggregate Visible B- Good Structural Defects <= 10% Diameter. Minor Corrosion Fracture, Joint Offset, Aggregate Projecting C- Fair Structural Defects <= 25% Diameter. Moderate Corrosion Crack, Spalling, Defective Point Repair, Major Sag, Aggregate Missing D- Poor E- Very Poor Condition & Criticality Scoring Missing or Broken Pipe. Severe Borrosion. Collapse or Imminent Collapse Broken, Fracture, Reinforcement Projecting, Reinforcement Visible Holes, Collapse, Missing Wall *NASSCO Pipeline Assessment Certification Program 19

19 Assigning Pipe Condition Score A (Very Good) B (Good) C (Fair) Condition & Criticality Scoring D (Poor) E (Very Poor) 20

20 Criticality Assessment Risk Based Analysis 21

21 Building an Asset Management Program STEP 6 What is the goal performance? STEP 4 STEP 5 Business Case for Projects/Activities CIP Forecast & O&M Strategies STEP 3 Risk Based Analysis STEP 1 STEP 2 Asset Inventory & Data Gathering Condition & Criticality Scoring Establishment of Levels of Service Flood protection Biological natural habitat Recreational amenity Water quality treatment 22

22 Building an Asset Management Program STEP 6 What are our priorities? STEP 4 STEP 5 Business Case for Projects/Activities CIP Forecast & O&M Strategies STEP 3 Risk Based Analysis STEP 1 STEP 2 Condition & Criticality Scoring Establishment of Levels of Service AGE Asset Inventory & Data Gathering 23

23 Building an Asset Management Program STEP 6 What are our priorities? STEP 4 STEP 5 Business Case for Projects/Activities CIP Forecast & O&M Strategies STEP 3 Risk Based Analysis STEP 1 STEP 2 Condition & Criticality Scoring Establishment of Levels of Service CONDITION Asset Inventory & Data Gathering 24

24 Building an Asset Management Program STEP 6 What are our priorities? STEP 4 STEP 5 Business Case for Projects/Activities CIP Forecast & O&M Strategies STEP 3 Risk Based Analysis STEP 1 STEP 2 Condition & Criticality Scoring Establishment of Levels of Service Asset Inventory & Data Gathering 25

25 Risk Based Assessment Probability of Failure Condition Consequence of Failure Criticality Low Impact Medium Impact High Impact Very High Impact Very Good Good Fair Poor Very Poor Risk Based Analysis 26

26 Risk-Based Assessment Risk = Criticality x Condition Consequence of Asset Failure Loss of service Impact to public health/safety Impact to property Impact to other infrastructure Compliance impact Repair difficulty Public image Probability of Asset Failure Age Physical condition Performance Available capacity Maintenance history Risk Based Analysis 27

27 Condition Assessment Good Fair Poor Risk Based Analysis 28

28 Criticality Assessment High Risk Risk Based Analysis 29

29 Building an Asset Management Program What are our strategies for asset service? STEP 4 STEP 5 STEP 6 Business Case for Projects/Activities CIP Forecast & O&M Strategies STEP 3 Risk Based Analysis STEP 1 STEP 2 Condition & Criticality Scoring Establishment of Levels of Service Asset Inventory & Data Gathering 30

30 Project Prioritization System City Criteria Life Safety Property Damage Level of Service Goals Environmental Impact Project Cost Project Readiness Fiscal Efficiencies Council Goals Benchmarks Sustainable Practice Economic Impact Business Case for Projects/Activities 31

31 Project Prioritization System Criteria Environmental Impact Sustainable Practice Life Safety Property Damage Fiscal Efficiencies Project Cost Project Readiness Economic Impact Sum Rank 1 Environmental Impact Sustainable Practice Life Safety Property Damage Fiscal Efficiencies Project Cost Project Readiness Economic Impact Business Case for Projects/Activities Less Important Equally Important More Important 32

32 Project Prioritization System Property Damage Severity Point Scale Description Low 1 Project has no relation to property damage 2 Medium 3 4 High 5 Project provides protection for property or infrastructure with an estimated tax value of <$200,000 Project provides protection for property or infrastructure with an estimated tax value of $200,000 - $600,000 Project provides protection for property or infrastructure with an estimated tax value of $600,001 - $5,000,000 Project provides protection for property or infrastructure with an estimated tax value of >$5,000,000 Business Case for Projects/Activities 33

33 Project Prioritization System Business Case for Projects/Activities 34

34 Business Case Communication Business Case for Projects/Activities 35

35 Building an Asset Management Program What are our strategies for asset service? STEP 4 STEP 5 STEP 6 Business Case for Projects/Activities CIP Forecast & O&M Strategies STEP 3 Risk Based Analysis STEP 1 STEP 2 Condition & Criticality Scoring Establishment of Levels of Service Staffing Asset Inventory & Data Gathering 36

36 Building an Asset Management Program What are our strategies for asset service? STEP 4 STEP 5 STEP 6 Business Case for Projects/Activities CIP Forecast & O&M Strategies STEP 3 Risk Based Analysis STEP 1 STEP 2 Asset Inventory & Data Gathering Condition & Criticality Scoring Establishment of Levels of Service Staffing Equipment O&M Approach Capital Projects Funding Strategy Monitoring, Review Update and Improvement 37

37 Whole-Life Cost Planning When is the right time to replace a particular asset? Optimize planned investments to realize the greatest value from assets based on financial constraints, risk tolerance, and performance obligations CIP Forecast & O&M Strategies

38 Stormwater Budget Allocation Storm Drain Rehab Water Quality 1% 13% Maintenance 37% Flood Mitigation 44% Flood Warning 5% CIP Forecast & O&M Strategies 39

39 Conceptual Allocation in Dry Years Maintenance 30% Storm Drain Rehab 32% Flood Mitigation 20% Water Quality 13% CIP Forecast & O&M Strategies Flood Warning 5% 40

40 Conceptual Allocation in Wet Years Maintenance 30% Storm Drain Rehab Water Quality 1% 13% Flood Warning 5% Flood Mitigation 51% CIP Forecast & O&M Strategies 41

41 After High Impact Flood Event Storm Drain Rehab 1% Water Quality 5% Maintenance 20% Flood Mitigation 72% CIP Forecast & O&M Strategies Flood Warning 2% 42

42 Asset Management Drivers improved financial performance better informed asset investment decisions better managed risk improved services and outputs improved efficiency and effectiveness demonstrated compliance enhanced reputation improved organizational sustainability demonstrated social responsibility

43 Getting Started with Stormwater Asset Management Fall Conference Broken Arrow, OK September 17, 2018 Trey Shanks CFM, IAM, PACP