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To fully comply with GASB 34 and Capacity, Management, Operation, and Maintenance (CMOM) requirements, and to provide a higher confidence level of facility/asset management to its customers, the Orange County Sanitation District (OCSD) needed a comprehensive and reliable system map and asset inventory. Due to the 50 years of construction projects expanding and rehabilitating portions of the treatment plants and collection systems, documentation for OCSD's assets had become nearly unmanageable. Accessing facility information and record drawings stored in cabinets and on stick files at various locations was a major bottleneck in the OCSD's 50-million-to 100-million-per-year capital improvement program. After implementing a web-based Facility Records and Engineering Drawing system (FRED) for its two wastewater treatment plants, OCSD wanted to extend their smart map initiative to the entire collection system. OCSD recognized that the system map and asset inventory of the collection system could also be used to populate and synchronize with a computerized maintenance management system (CMMS) to build a single asset data source. This initiative was titled the Trunk Sewer Mapping Project (TSMP) and included the development of the following components:

A Geographic Information System (GIS) including Gravity, Forced and Siphon Sewers, Manholes, Pump Stations, and Sewer Easements.

Easy access to geo-referenced scanned images of record drawings from OCSD's Electronic Document Management System (EDMS).

Printed Color Map Books for field and office use.

An Electronic Map Book for quick navigation, viewing, and printing of map book sheetsfrom a central file server and from DVD for remote access.

A complete database of sewer collection system asset records that are loaded into OCSD's Computerized Maintenance Management System (CMMS)

Development of a Map Product Generator for use in developing and maintaining the mapping data and map books.

During the course of the sewer mapping project, OCSD's initiative posed several challenges which were overcome by creative solutions, dedicated teamwork, and a commitment to flexibility and success. These drivers, challenges and solutions are described below along with lessons learned during the two-year project.

Document Type: Research Article


Publication date: January 1, 2003

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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