EE&T engineers have extensive experience in the analysis, design, and construction of water systems, successfully completing work on mains from 4 to 96-in diameter. These projects have included the design of large diameter water transmission mains, as well as the design of upgrades and improvements to distribution system piping and water service lines in residential areas. Our water system designs have included:
Distribution System Analysis — EE&T personnel have completed analysis of numerous water distribution systems to increase system capacities, to provide fire flow to residential, commercial and institutional facilities, and to size and locate booster pump stations and water storage tanks. Employing pre-engineered software including EPA Net, Micro-Hardy Cross, Cybernet, and KYPIPE, augmented with on-site flow testing where feasible, EE&T engineers have assembled over 15 hydraulic models to simulate existing distribution systems and model proposed system improvements. Analyses included difficult to model features such as multiple water sources, booster stations, and multi-pressure zones, as well as large daily and seasonal variations in water demand.
Pipeline Rehabilitation — EE&T engineers have completed engineering services for the cleaning and cement lining of cast iron water mains up to 60 inches in diameter, including over 50,000 linear feet of small diameter (up to 12-in.) and 10,000 linear feet of large diameter (12 to 60-in.) piping for the City of Buffalo, New York. We have also completed design and construction administration services for the cleaning of 18,000 linear feet of concrete transmission main, increasing the C-factor of the pipeline from less than 70 to over 120. Cleaning experience also includes a combined 11,000 linear feet of 60- and 72-in. raw water intake piping for the City of Erie, Pennsylvania and numerous small diameter piping systems.
New Transmission Systems — EE&T engineers successfully completed design and construction administration services for several hundred miles of water transmission and distribution piping, and wastewater force mains. Materials of construction include pipes of PVC, ductile iron, concrete, HDPE, steel, and asbestos cement. One project in particular involved the design and construction administration services for 13.2 miles of treated water transmission main and appurtenances involving a water authority, an Indian nation, and five municipalities. EE&T personnel have completed engineering services for a 90-inch filtered water conduit, including wet-connection to existing operating clearwell and tunnels, and 5000 linear feet of 66-inch pile-supported, above ground sanitary force main.
Subaqueous Piping — EE&T personnel have completed analysis, design, and construction administration for subaqueous pipeline installations ranging from 16- to 66-in. diameter, involving lakes, creeks, rivers, and ocean installations. Projects include the crossing of the Niagara River with 2,500 linear feet of 36-in. piping, and 12,500 linear feet of 66-in. diameter ocean outfall for the Hampton Roads Sewer District. EE&T personnel have designed and administered construction of raw water intakes featuring multiple port inlets, air backwash, and biofouling control. Additionally, EE&T personnel have successfully engineered the installation of nearly 100,000 linear feet of HDPE piping to protect the raw water intakes of over 30 North American utilities from biofouling.