HOW THICK IS YOUR HEVI-COAT: EVALUATING BURIED SUB-AQUEOUS PIPES IN A MARINE ENVIRONMENT
Abstract:The Ocean County Utilities Authority owns and operates three wastewater treatment plants and approximately 160 miles of interceptors, including approximately 15 miles of critical Barnegat Bay crossings, Atlantic Ocean outfalls, and river and stream crossings. These facilities discharge treated secondary effluent to the Atlantic Ocean. In addition, the Authority owns and operates a series of pump stations on the barrier islands of Island Beach and Long Beach Island. The pump stations deliver untreated wastewater from the barrier islands to their respective treatment plants by way of a system of force mains and interceptors. Ocean County sees approximately 2 billion per year in recreation tourism and commercial fishing. Thus, the need to operate and maintain the Authority's facilities in an exemplary manner has a direct economic benefit on the region.
This project included the inspection, evaluation and confirming the accurate location of the Authority's bay crossings and outfalls that were constructed approximately 25 to 30 years ago. Techniques used to perform this project included electronic survey equipment such as: high resolution side scan sonar survey, real-time or kinematic differential Global Positioning System (DGPS) with two-foot or better accuracy (sub-meter accuracy), fathometer bottom profiling survey, and magnetometer profiling. In addition, the use of electronic technique was supplemented with dive inspection, digital still photography, and video tape recording.
Document Type: Research Article
Publication date: 2004-01-01
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