If crews find only moderate deterioration, the manhole is lined by the utility's contractor. USPC supplies the replacement manholes and utility crews install them. Blackard says the utility inspects manholes directly downstream from force main dump manholes and replaces structures that are sufficiently corroded. "We are looking at bringing additional rehab methods in, such as sliplining, mechanical seals and spiral-wound lining," says Linear Asset Manager Deirdre Blackard.Įpoxy composite is usually the choice for manhole replacement in corrosive parts of the system. In 2012, Gwinnett County lined approximately 10,000 linear feet, pipe burst 1,800 feet, and replaced 8,500 feet. In-house crews are supported in these efforts by contracted services. The utility conducts its own smoke-testing program and employs a full range of technology - open trench, CIPP, point repairs and pipe bursting - to repair and replace defective sewer pipes. For larger pipes, field crews use a Mudmaster (CUES). County crews use Vactor and Vac-Con trucks to clean lines as necessary, typically 200 to 400 miles per year. Three in-house CCTV crews and Video Industrial Services (the County's SSES contractor) inspect about 180 miles of sewer line per year, using CUES equipment and POSM software. The wastewater collection system includes 2,600 miles of pipe, 225 pumping stations, 280 miles of force mains and over 74,000 manholes. Wayne Hill Water Resources Center at 60 million gallons per day, the Crooked Creek Water Reclamation Facility at 16 mgd, and the Yellow River WRF, recently expanded from 14.5 to 22.0 mgd. Three wastewater treatment plants serve the area - the F. The county's Department of Water Resources represents the merger of separate county water and wastewater departments in the late 1980s. ![]() Located in the northeastern part of the metropolitan Atlanta area, Gwinnett County is home to some 800,000 people and has been one of the fastest growing counties in the United States over the last 20 years. With support from senior management and the OTS group in place, Gwinnett County has been able to improve asset management across the board - from more complete identification of attributes, to prioritization of maintenance, to cost reductions on capital improvement projects and more. "We had no one on the back end analyzing the information." "But, the issue was 'what were we doing with the data?' " he says. In the case of Gwinnett County, Kaffezakis says the utility's field crews - using GIS and computerized maintenance management - do a good job of gathering information. ![]() "The biggest challenge is having people who can analyze the data." "Utilities have lots of information," says George Kaffezakis, division director for asset management and support. ![]() Gwinnett County, Ga., has answered that challenge by creating a field-savvy Operations Technical Services group (OTS) charged with analyzing data, determining priorities and applying the utility's resources in the most cost-effective way. The key to effective utility management is analyzing and assessing the information and using it to make critical operating and capital investment decisions. Today's water and wastewater utilities don't lack for data modern technologies provide scads of it. Get Trucks articles, news and videos right in your inbox! Sign up now.
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