Lumberton's Sewer System Mapping
Sewer Mapping Allows City to Plan Sewer Repairs
In 2009, the City of Lumberton had no map of their overall sewer system. The initial project was to map all the utilities in the central part of the City. It was quickly determined that there were not enough funds available to provide this service for the area desired, so the City decided to just map the sewer system, and to assess the condition of the manholes. The deliverable was a GIS database featuring the manhole and pipe material type, pipe inverts, x, y, z location, and the condition rating of each structure. Easily found cleanouts were also mapped. Phases 2 and 3 mapped additional areas of the sewer system as well as manhole conditions.
As part of an existing sewer rehab project completed by The Wooten Company, the City completed an Asset Management Plan in conformance with CG&L standards. This document recorded the approximate age of sewers and other assets of the sewer system and developed a Capital Improvement Plan with estimated rehab work for the next 10 years.
The City then applied for a Technical Assistance Grant for a phase 4 mapping project to look at another portion of the sewer system. This area in the northwestern part of the City was mapped and an engineering report was developed to address overloading of various pump stations and alternative solutions to address the capacity issues in those pump stations.
Phase 5 of the mapping will be covered by an Asset Inventory and Assessment grant that has just been received. This grant is anticipated to complete the mapping of the sewer system. Prior to phase 5 the system includes 1316 manholes, 39 pump stations and 1,266 clean outs.
The Wooten Company incorporated GPS survey grade location devices to locate manholes and record data on each manhole and the associated sewer lines. As a result of this asset management process, the City has been able to plan sewer repairs. The City is working to go from a reactive process of repairing sewer lines as they collapse to a planned approach for rehabilitating the sewer lines prior to their failure.