Water Asset Management International 1.4 (2005) 12-19

Water main rehabilitation prioritisation: getting the data together for OWASA

Kilmeny J Stephens

Earth Tech
USA

The Orange Water and Sewer Authority (OWASA), in Orange County, North Carolina, is proactively prioritising mains in its 360-mile water system that may need to be replaced or rehabilitated (R&R). This feature describes the first phase of the project to create a dynamic water main R&R prioritisation model: data gap analysis and weighted service level criteria factors.

Baseline data was collected and input into OWASA’s geodatabase, and Earth Tech assisted by populating specific fields such as date of installation, water quality concerns, number of breaks/leaks, and hydraulic performance. The final product will be an MS Access/ARCGIS model with detailed documentation.

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