SSES and GIS, A Great PartnershipCindy Fort, PE

Technical Director Environmental Engineeringand

Jeff McCannGIS Coordinator

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

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

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

City of LawrenceThe System

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

City of LawrenceSewers Split by an Interceptor

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)

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

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

GISFlow Meter Basins

• Baseline data developed with GIS by defining basins for flow metering

• GIS used to confirm sanitary system connectivity

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

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

GISConditional Analysis

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%

GISCriticality Analysis

Criticality Criteria

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

ArcPublisher

Delivering a Supporting Map

Questions

Jeff McCannGIS Coordinator

American Structurepoint, Inc7260 Shadeland Station

Indianapolis, Indiana 46256317-547-5580

jmccann@structurepoint.com