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Engineers report large unaccounted water and excess sewer inflows; AIA study to guide fixes and rate adjustments
Summary
Willis Engineers presented an asset inventory and assessment (AIA) funded by a $500,000 state appropriation. Early findings show high unaccounted-for water in the Burke South system, substantial infiltration and inflow (I&I) into sewer basins, and field defects identified by smoke testing and flow monitoring.
Willis Engineers presented the results so far of an asset inventory and assessment (AIA) for Burke County's water and sewer systems, a project funded by a $500,000 grant from the North Carolina General Assembly.
Why it matters: The AIA will guide capital, operational and rate decisions for county water and sewer utilities. The study aims to identify physical defects in pipes and manholes, improve the county's GIS mapping of assets, and produce a long‑term financial plan that avoids subsidizing utility operations from county tax revenues.
Major findings and methods: The consulting team said it combined as‑built drawings, field reconnaissance, hydrant testing, 11 temporary flow monitors, smoke testing (about 50,000 linear feet of sewer line), and CCTV inspection planning to establish the inventory and diagnose defects.
Key network stats presented (study team): - Water: roughly 2,300 county customer connections, about 100 miles of distribution pipe, 386 hydrants, five storage tanks and eight booster pump stations; Burke South is the largest system (about…
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