AWWA ACE58209

CDM has been assisting the Public Works Commission (PWC) of the City of Fayetteville, NorthCarolina in the planning and design of their water distribution infrastructure for morethan 10 years. Over thepast few years, PWC has received discolored water complaints from the Vanstory Hills,Montclair, and Haymont areas during the warmer weather months (generally starting MemorialDay weekend). In early May 2001, PWC received an extremely high number of discolored watercomplaints in these areas leading PWC to authorize CDM to conduct a discolored waterevaluation to identify the potential causes of the discolored water events. The evaluationidentified three contributing factors:deterioration of unlined cast iron pipe, a major source of color-causing material; and,pump operational impacts. In order to address these causative factors and to assist PWC in their mission to provide thehighest level of water quality and customer service, and to prudently manage their investment inwater distribution infrastructure, CDM recommended that the following three tasks:define the existing flushing program; develop a predictive maintenance program for scheduling replacement andmaintenance of water distribution pipe; and,develop pumping sequence strategies at the School Road re-pump facility thatprovide gradual flow changes and reduces transients/surges in the western portion of thedistribution system.These tasks evolved into a distribution maintenance development project involving two phases.The primary objectives of Phase I were to minimize future discolored water complaints in theVanstory Hills, Montclair, and Haymont areas by improving the flushing program anddetermining the most effective method to operate the School Road re-pump facility and WTFhigh service pumps in order to minimize the potential for discolored water. This paper describesthe enhanced UDF program and its results. Phase II will expand refinement of the flushingprogram to all areas of the distribution system and will include development of a predictivemaintenance program. Includes tables, figure.

Product Details

Edition:

Vol. - No.

Published:

06/15/2003

Number of Pages:

9

File Size:

1 file , 1.9 MB