AWWA ACE93253

This paper presents the Elizabethtown Water Company's (EWC) innovative solution to a challenging problem: How to withdraw 200 mgd from a shallow river while protecting indigenous fish species. As a part of its new Canal Road Water Treatment Plant (WTP) construction project, EWC plans to build an intake to withdraw 200 mgd (8.8 m3/s) from the Raritan and Millstone Rivers in central New Jersey. The site presents engineering and environmental constraints that are typical in riverine settings. In the vicinity of the intake, the river is only about 6 feet (1.8 m) deep. Under various river conditions, sediment, river bed load, frazil ice, and zebra mussels can potentially clog intake screens and impair their operation. The proposed facility will be located in a flood plain and conventional above-grade structures would be challenged by regulatory agencies. The intake location will be downstream of a river section that is stocked with trout, and a program for restoration of American shad is also being implemented in the River. Therefore, the intake design must provide protection from impingement and entrainment of fish, eggs, and larvae. The objectives of the raw water intake design are to: reliably deliver 200 mgd raw water supply; control sediment and bed load deposition; protect native fish, eggs, and larvae; control frazil ice formation; control zebra mussel infestation; and meet stringent regulatory requirements.

Product Details

Published:

01/01/1993

ISBN(s):

0898677157

Number of Pages:

13

File Size:

1 file , 480 KB