public works infrastructure asset management system …asset management system county of el dorado...
TRANSCRIPT
![Page 1: Public Works Infrastructure Asset Management System …Asset Management System County of El Dorado Long Range Planning and Tahoe Engineering Russ Wigart, CPSWQ Brendan Ferry, CPSWQ](https://reader033.vdocuments.net/reader033/viewer/2022041807/5e55376a4c15f7201974231c/html5/thumbnails/1.jpg)
Public Works InfrastructureAsset Management System
County of El Dorado
Long Range Planning and Tahoe Engineering
Russ Wigart, CPSWQBrendan Ferry, CPSWQ
Daniel Kikkert, P.E.
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South Lake Tahoe
• Population ~25,000– ~200 County road miles– ~8,500 homes
• Asset Management System– 12 years in development– 3 years field verification work– Conversion of CAD to GIS– Approximately 2 million invested to date
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Benefits of an In-house Managed System
• Limit recurring costs• Develop site specific solutions• Targeted and focused• Easily fixed and manipulated • Eliminates rights / access issues• Facilitates inter divisional relations
– Maintenance, Facilities, Bridge, Env, etc..
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Evolution of an Evolving System• 2008 – NPDES Mandated Outfall Inventory • 2010 – Multiple CAD file compilation to single map network• 2012 – Began CAD to ArcGIS crosswalk• 2013 - Created Data Dictionary for Collection• 2014 – Finalized ArcGIS asset mapwork• 2015 – Initiated Kerata data collection platform • 2016 – Switched to Collector data platform• 2017-19 (Collector Era)
– Beta Test (2016-17)– Finalized Data Dictionary – Refine workforce layer application – Apply to other divisions (forestry, bridge crew, utilities etc)
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Watersheds – El Dorado Mapped
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Outfalls• Defined by EPA: The point where a municipal separate storm sewer discharges to waters of the United States and does not include open conveyances connecting two municipal separate storm sewers, or pipes, tunnels, or other conveyances which connect segments of the same stream or other waters of the United States and are used to convey waters of the United States.
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0 50 100 150 200 250 300 350 400 450
Out
fall
Dist
ance
to S
urfa
ce W
ater
(ft)
WS ID
Outfall Distance vs WS ID
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1
10
100
1000
10000
0.1 1.0 10.0 100.0
Dis
tanc
e to
Sur
face
Wat
er (f
eet)
Impervious Area (acres)
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Prioritization
• Known watersheds with:– Estimated loads– Maintenance activities– Existing conditions– Distance from discharge points to a surface water
• Opportunities:– Reduce the loads
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Reduce the loadPollutant Load = (Area * Precipitation) * EMC * connectivity
• Volume Retention• EMC to Characteristic Runoff Coefficient (CRC)• Change the connectivity• Capture of material
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Infrastructure
• Utilized County staff and extra help to build a database of all existing County infrastructure in the Tahoe Basin
• Consisted of: Drop Inlets, Sediment Traps, Storm Drain Manholes, Storm Drains, Culverts, Curb/Gutter, Channels, Treatment Basins, and Retaining Structures.
• Data was collected from Subdivision Maps, Record Drawings, and Field Observations using a hand held GPS unit.
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Infrastructure Learning Process
• Our County is a wonderland
• Discovery was a normal part of the process: what was shown on subdivision maps and drawings versus what was found in the field
• Leaned heavily on old timers in maintenance and engineering who remembered when
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Golden Bear Area
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Golden Bear Area
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Tahoe Hills Area
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Montgomery Estates Area
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Asset Management System
• Line work was stored in AutoCAD and the associated data was stored in MS Access
• All data has been converted over to ArcGIS
• Provides a valuable asset management tool. Has become a way to memorialize improvements in the ground … less knowledge is now slipping through the cracks
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Infrastructure Mapbook
Effective but a paper mess
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Electronic Data Collection
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ArcGIS
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Data Dictionary
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Data Dictionary
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Data Dictionary
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Data Dictionary
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Asset Maintenance
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Collector Use by Maintenance
• Established in 2017 after many years of development
• Ipads with Vactor truck, field inspectors and maintenance supervisors
• County assets inspected prior to maintenance and labeled as High, Med, Low
• Assets are then maintained and marked as “completed”
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Other Uses of Collector
• Identifying / locating of problems • Efficient routing of information to responsible
divisions• Efficient Maintenance• Data Queries• Illicit Discharges• Public Engagement
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Asset Maintenance
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ArcGIS Walkthrough
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Collector / GIS Demo
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Collector / GIS Demo
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Collector Data
• Exporting data – All data is logged in Collector and stored in ArcGIS Online
• Data can be queried at any time for record keeping, logging or tracking information
• All inspection records are accessible to both management and supervisors
• Information can be seen online or exported to excel
• Information is now being used to track RAM data
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Collector
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Next Steps
• Continued refinements of the tool• Incorporate Cost Data• Expand to West Slope• Purchase more Ipads• Incorporate PCI• Training
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Questions?