AWWA ACE95114

The Shenango Valley Water Company, a subsidiary of Consumers Water Company, owns and operates a conventional surface water treatment plant in Western, Pennsylvania. The beginnings of the water supply system date back before 1860 when water was pumped from the Shenango River, without treatment, at the site of the present treatment plant. The Shenango River at the point of withdrawal drains a watershed of approximately 650 square miles. Raw water quality is highly variable. Disinfection byproducts, taste and odor, manganese and particle removal/inactivation are common seasonal concerns. The plant currently treats and pumps approximately 12 MGD. Over the years plant facilities have been added or modified in such a way as to meet customers requirements and minimize project costs by using existing facilities to the extent possible. A time line comparison of when the components of the existing facility were constructed compared to when key drinking water regulations become effective is depicted. The case study at Shenango Valley illustrates the need to periodically conduct a comprehensive assessment of water treatment facilities. The assessment should integrate tests for adequacy of capacity, structural condition, and treatment processes. Economic and non-economic concerns are then compared for a number of site specific options to identify the proper project whether it is a minor rehabilitation of a few components or construction of an entirely new facility. Rather than to react to changing demands with short term limited scope projects where rate impact is continually minimized, assessment of the entire treatment facility can ultimately better serve the public.

Product Details

Published:

01/01/1995

ISBN(s):

0898678358

Number of Pages:

21

File Size:

1 file , 2.6 MB