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SSES and GIS: A Great Partnership in City of Lawrence

Learn about the partnership between SSES (Sanitary Sewer Evaluation Survey) and GIS (Geographic Information System) in the City of Lawrence. Discover how GIS helps track field data, analyze system conditions, and plan future maintenance projects.

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SSES and GIS: A Great Partnership in City of Lawrence

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  1. SSES and GIS, A Great Partnership Cindy Fort, PE Technical Director Environmental Engineering and Jeff McCann GIS Coordinator

  2. Overview • City of Lawrence • The Background • The System • Sewers Split by an Interceptor • SSES • The Reason • The Goals • GIS • One Tool In The Toolbox • Flow Meter Basins • Tracking Data – Field to Client • Conditional Analysis • Criticality Analysis • Projects and Future Maintenance • ArcPublisher • Questions

  3. City of LawrenceThe Background • Lawrence is a satellite community to Indianapolis • WWTP was decommissioned in 1980s • Wastewater was then diverted to Indianapolis’ Southport Advanced Wastewater Treatment Facility • Minimum locations of direct customer connections to each system

  4. City of LawrenceThe System • Managed by City of Lawrence Utilities • Sanitary sewer system is separate from storm system • 915,800 lf of sanitary sewer, sized 8” to 36” • 36,350 lf of sanitary force main • 23 sanitary sewer lift stations • Private sanitary systems • 116,000 lf of sanitary sewer and 471 manholes

  5. City of LawrenceThe System

  6. City of LawrenceSewers Split by an Interceptor • City-owned collection is bisected by an Indianapolis-owned interceptor • Lawrence, Indianapolis has 41,800 lf of sanitary sewers, sizes 24” to 48” • Indianapolis also has 112 manholes in Lawrence’s city boundary

  7. City of LawrenceSewers Split by an Interceptor

  8. SSESThe Reason • June 2006―EPA conducts wet weather inspection • September 2008―EPA issues Order for Compliance • EPA Mandated Deliverables: • Sanitary Sewer Overflow (SSO) Reporting Procedure • Public Notification Program regarding SSOs • Overflow Emergency Response Plan • Capacity, Management, Operations, and Maintenance (CMOM) Program • Sanitary Sewer Evaluation Survey (SSES)

  9. SSESThe Goals • Identify sources and quantities of clear water infiltration/inflow (I/I) in all public and private sewer systems • Determine feasible solutions to eliminate I/I • Mitigate impact of excessive I/I on SSOs and water in basement within the city and all downstream sewer systems

  10. GISOne Tool in the Toolbox • Data management • Able to track field services • Manhole Inspections – 3900+ ea • Survey Level GPS – 2300+ ea • Smoke Testing – 670,000+ lf • CCTV/Cleaning – 244,000+ lf • Data analysis review • Ability to see patterns of system conditions • Spatial relationships • Assistance in future system decisions

  11. GISFlow Meter Basins • Baseline data developed with GIS by defining basins for flow metering • GIS used to confirm sanitary system connectivity

  12. GISTracking Data - Field to Client • Manholes inspections, smoke testing, CCTV, and cleaning of existing facilities • Survey-grade GPS on critical structures • Mapping-grade GPS on all inspected structures • MS Access database provided with shapefiles • Data placed into GIS to track field progress • Allowed staff to focus in areas of concern

  13. GISConditional Analysis • Field data reviewed and rated per industry standards • GIS used to place data within mapping for City-wide review of results • GIS conditional analysis assisted in generating boundaries for grants and future projects

  14. GISConditional Analysis

  15. GISCriticality Analysis • Criticality – system spatial relationship related to following categories: • Public Health – 30% • Environmental Impact – 25% • Transportation – 20% • Quantity of Flow – 15% • Ease of Emergency Repair – 10%

  16. GISCriticality Analysis Criticality Criteria

  17. GISProjects and Future Maintenance • Placing field data into GIS assists in pinpointing projects • Allows the City to plan project monies in current and future fiscal years • Focus can be placed on scheduled maintenance • Data is analyzed to determine critical areas of concern

  18. ArcPublisher Delivering a Supporting Map

  19. Questions Jeff McCann GIS Coordinator American Structurepoint, Inc 7260 Shadeland Station Indianapolis, Indiana 46256 317-547-5580 jmccann@structurepoint.com

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