Michigan Department of Environmental Quality Drinking Water Asset Management. Wayne Pratt
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1 Michigan Department of Environmental Quality Wayne Pratt
2 Agenda 10:00 Distribution System Assessment 10:30 Leak Detection 11:00 Pipeline Condition Assessment 90 minutes An Integrated Approach to Asset Management
3 Distribution System
4 The Challenge Water systems are comprised of both control & delivery assets Control points (valves) are designed and installed to control delivery assets (pipes) Control points can be renewed (thereby reducing risk) at a fraction of the cost of renewing delivery assets Control points were rarely used in the early years because of the relative good condition of delivery assets
5 The Challenge Catch-22 - control points worked when they weren t needed and now largely do not work when they are needed While many delivery assets are not controllable in the short term -- control points, in the ground today, are controllable in the short term A focus on control points before delivery assets delivers faster results and prepares utilities for the huge ongoing costs of infrastructure renewal
6 What are the Failures? Failure to control the system by shutting it down efficiently to manage a main break Failure to control the system by shutting it down efficiently to perform construction Failure to deliver service to a customer that shouldn t be affected by a shutdown Failure to efficiently deliver quality water Failure to deliver optimal fire-fighting capacity
7 What are the Costs of Failure
8 Opportunity to Minimize Costs Minimizing the duration and footprint of failures has a direct impact on minimizing consequences and costs Damage to public infrastructure Damage to private infrastructure Collateral Damage Traffic disruptions Damage to public infrastructure Customer outages Damage to Public private health infrastructure Utility Labor & Equipment Traffic disruptions Contractor Labor & Equipment Customer outages Delay Public charges health Utility Labor & Equipment Contractor Electricity Labor & Equipment Delay Chemicals charges Electricity Chemicals Raw water Collateral Damage Labor & Equipment Labor & Equipment Treated Water Treated Water Sum of Costs Sum of Costs
9 The Value of System Control Control is a function of: Asset Usability Information Usability
10 The Value of Control In this context, control is a function of; Asset usability Information usability The value of control is realized in both; O&M budgets by reducing costs Capital budgets by deferring investments Plus cost avoidance for the city Collateral damage Political fall out Business disruption
11 Control Asset Usability What Constitutes Asset Usability? Can I find it? Can I access it? Can I fully close it?
12 Control Asset Usability
13 Nationwide Control Point Operability Based on the inspection of over 500,000 valve control points by Wachs Water Services % = National Average Operability
14 Control Asset Usability Asset usability consequences: Duration: damaging flow and actions to control the situation 3 valves vs. 7 valves Footprint: more customers and hydrants out of service 1 hydrant/ 3 services vs. 2 hydrants/17 services break hydrant valve service
15 Valve Operability Comparison Initial Operability 31% Operable Inoperable Current Operability 16% 69% 84% 49% reduction of inoperables
16 a
17
18 21 Valve Shutdown Large Footprint Low Efficiency
19
20
21 4 Valve Shutdown High Efficiency
22 Information Usability What Constitutes Information Usability? Is it Accurate? Is it Meaningful? Is it Available?
23 Information Spatial Accuracy 190 ft
24 Information Spatial Accuracy 230 ft
25 Information Accuracy - Before
26 Information Accuracy - After
27 Information Accuracy - Comparison
28 Information Accuracy - Results
29 Information Accuracy Straight Line Distance (in US Feet) 35 Distance from GPS to existing GIS Mean = 35ft: 3,800 sqr ft, 1,170 sqr m 10% > 80 ft: 20,100 sqr ft, 6,125 sqr m,.5 acre 5% > 125 ft: 49,000 sqr ft, 15,000 sqr m, >1 acre
30 Information Accuracy At 35 ft, the search area is ~3,800 sqr ft [π r 2 ]
31 Information Accuracy Capturing and Integrating high accuracy mapping grade GPS significantly reduces search area Sub-meter 33 sqr ft Sub-foot 3 sqr ft
32 GPS Accuracy Accuracy Sub-foot Decimeter Sub-meter 7 Years Ago Today Time
33 GPS Accuracy Sub-Foot Search Area = Feet, Less than 10% of Sub-Meter Search Area 1 Foot 1 Foot 3.28 Feet 3.28 Feet Sub-Meter Search Area = Feet 4in Decimeter Search Area = Feet, ~4 2 Inches roughly the size of a roadway box lid 1% of Sub-Meter Search Area, 11% of Sub-Foot 4in
34 Information Accuracy Valve field-verified to be north of connection, this is an example of a Hydraulically Significant Discrepancy
35 Information Accuracy Map Size (pipe size) Actual turns CWW GIS Diameter CWW Turns Map Discrepancy Details GIS SHOWS 10" VALVE ON 24" MAIN MAP SHOWS 12 INLINE, IS 6 GOING TO THE HYDRANT GIS SHOWS 12" VALVE ON 6" MAIN GIS SHOWS 10" VALVE ON 6" MAIN GIS SHOWS NO VALVE SIZE ON 16" MAIN GIS SHOWS 10" VALVE ON 6" MAIN GIS SHOWS 10" VALVE ON 8" MAIN GIS SHOWS 8" VALVE ON 6" MAIN GIS SHOWS 10" VALVE ON 6" MAIN GIS SHOWS 10" VALVE ON 6" MAIN GIS SHOWS 10" VALVE ON 6" MAIN GIS SHOWS 10" VALVE ON 6" MAIN
36 Information Accuracy Hydraulically Significant Discrepancies Resolved Utility A <1,000 Customers Utility B ~10,000 Customers Utility C ~50,000 Customers Summary Attribute Not on Map Network Configuration
37 Meaningful Content
38 Before After FacilityID CWSV-A0900 Transferred_UNITID CWSV-A0900 Diameter 10 inch VALVE_SIZE 24 BypassValve <null> BYP_VALVE_PRESENT YES BYP_EXERCISED YES BYP_TURNS 10 BYP_OPERATOR OPERATING NUT BYP_FIELD_NOTES 12 INCH BOX STOPS HARD BOTH WAYS BYP_CONDITION GOOD BYP_LID_SIZE OTHER BYP_LID_CONDITION GOOD BYPASS_STRUCTURE BOX BYP_STRUCTURE_COND GOOD BYP_POSITION_FOUND CLOSED BYP_POSITION_LEFT CLOSED RightToClose TRUE CLOSE_DIRECTION RIGHT HAND CurrentlyOpen TRUE POSITION_FOUND OPEN NormallyOpen TRUE POSITION_LEFT OPEN PercentOpen 100 TurnsToClose 32 TURNS 104 Operable <null> VALVE_CONDITION GOOD EnclosureType ValveBox STRUCTURE VAULT STRUCTURE_CONDITION GOOD LID_SIZE 27" LID_CONDITION GOOD FIELD_NOTES 27 INCH VAULT LID MARKED SEWER OPERATOR_TYPE OPERATING NUT MAP_DISCREPANCY OTHER MAP_DISCREP_COMMENT GIS SHOWS 10" VALVE ON 24" MAIN SURFACE_COVER ASPHALT COVER_LEVEL AT GRADE VALVE_TYPE INTERNAL GEARED GATE ORIENTATION HORIZONTAL OPNUT_DEPTH 2 EXERCISE FULL INITIAL_OP YES OP_METHOD TRUCK MOUNT Drinking Water MAX_TORQUE Asset Management 300 FINAL_TORQUE 50
39 ESRI Operations Dashboard Learn more: Getting Started with GIS
40 The Value of System Control Higher Higher System Control Medium Medium Consequences of Failure & Costs Lower Lower
41 Investing in System Control Canton : Atlanta : Kansas City : San Antonio : Detroit : Petoskey : WSSC : Ft. Lauderdale : Houston : Knoxville : Dallas : Austin : Phoenix : Charlotte : Baltimore : Raleigh : St Joe : Washington DC : Tampa : American Water : LADWP : Nashville : Wilmington : West Springfield : Annapolis : Gillette : Skokie : New Braunfels : Coconut Creek : Hollywood : Corona : Pittsburgh : Rochester : Napoleon
42
43 Varying Levels of Investment Basic Control Activities Advanced Control Activities Valve Assessments Hydrant Assessments Global Positioning Information Management Minor Valve & Hydrant Repairs System Testing Structure Improvements Large Valve Repair Leak Detection Valve & Hydrant Replacement System Troubleshooting Pipeline Inspection System Installation Construction Shuts / Emergencies Session 1 - MFS
44 Conventional Leak Detection
45 Utility in Central Texas Proactive Utility Committed to Reducing Non- Revenue Water ~890K Customers Supplied via 3,600 Miles of Main 3,000 Miles are </=16 PVC, Cast Iron & Ductile Iron Pipe 200,000 Service Connections Leak Sounding and Investigator Utilized
46 Leak Detection Program 700+ miles of Distribution Main Leak Sounding Performed on Multiple Service connections: meter boxes valves hydrants air release valves Utility Selects Inspection Areas Mile Increments Leak Noise Correlation Performed at Night During times of low flow over longer distances by Utility
47 Leak Detection Program Results (470 miles of reporting to date) Air Release Valves Flush Valves Fire Hydrants Meter Boxes Service Fittings Assets Inspected Leaks Located Water Visible Can Not Locate Paved Over Not In Service Valves Total
48 Texas Project Insights Leak Sounding & Correlation is Cost-effective Broad Brush Approach Water did not Surface in Majority of Cases Leak sounding Improve Overall System Efficiency Extend Asset Life Through Identifying and Fixing Small Problems Maximizing Asset Visits Increases Value
49 Typical Leak Sources Faulty Valve Seat Service Line Leak Valve Leak Packing Replaced Undocumented Chamber
50 Conventional Leak Detection
51 Deerfield Golf Club 3 gpm Leak on Main Thought to be Abandoned
52 Midwest - Leak Sounding Pilot 53 Strong Leak Sounds
53 Advanced Technology Pipeline Inspection Investigator
54 Transmission Main QA Inspection LDS1000 for transmission mains ranging in diameter from 16 to 96-inch Acoustic / video inspection with 3,000 ft deployment length per insertion Utilities should invest in access points (2-inch minimum) during pipe installation
55 Locating Service Connections
56 Know What s Inside Your Pipe Investigator can identify: Closed valves Lost valves Lost tools Undocumented air release valves Undocumented drain valves Undocumented valves Illegal service connections Undocumented junctions Pipeline direction Pipeline material Improperly installed liner Improperly repaired cracks Diameter changes Corrosion Pipe blockages & flow restrictions Improper backfill Damaged pipe joints Damages service connections Leaks Damaged pipe walls Air pockets Screw plugs Hardwood dowel repairs Operability of valves Tuberculation levels Debris accumulation What else do you want to KNOW about?
57 BEAR CREEK LIMITORQUE REPLACEMENT Session 1 - MFS
58 Damaged Limitorque Operator 36 BF
59 New Limitorque Installation
60 Investigator Inspection of 36 BF
61 Bear Creek Debris Removal
62 33 of Air Duct Pulled from Main
63 February 2012 The cost of repairing and expanding U.S. drinking water infrastructure will top $1 trillion in the next 25 years "The dawn of an era in which the assets will need to be replaced puts a growing stress on communities that will continue to increase for decades to come."
64 An Integrated Approach to Asset Management Basic Control Activities Advanced Control Activities Valve Assessments Hydrant Assessments Global Positioning Information Management Minor Valve & Hydrant Repairs System Testing Structure Improvements Large Valve Repair Leak Detection Valve & Hydrant Replacement System Troubleshooting Pipeline Inspection System Installation Construction Shuts / Emergencies Session 1 - MFS
65 An Integrated Approach to Asset Management Increases Efficiency & Effectiveness Prepares for Replacement Wave Focuses Scarce & Limited $$$ One Step Toward the Daunting Task Ahead
66 Michigan Department of Environmental Quality Thank You! Wayne Pratt VP Operations (847)
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