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• • 11.H.1. TIMBER RIDGE COMMUNITY WATER SERVICE LINE REPLACEMENT (R&R) - PHASE I - RESIDENTIAL WATER SERVICE LINE REPLACEMENT PROGRAM - GEORGE E. FRENCH The Board reviewed a Memorandum of August 23, 2002: Date: To: Friday August 23, 2002 James E Chandler County Administrator Thru: W. Erik Olson i Director of Utility ervices Prepared and Staffed By: Gene A. Rauth, Operations Manager Gordon E. Sparks, PE, Environmental Engineer Subject: Residential Water Service Line Replacement Program - Timber Ridge Community Water Service Line Replacement (R&R) Phase I BACKGROITND• Timber Ridge is a subdivision consisting of 228 existing single and multi -family family homes plus a clubhouse and guardhouse in the 600 block of Oslo Road. Construction was begun in the 1980's and is served by both water and sewer service from the County's facilities. The water service Imes between the water mains and meter boxes were constructed of polybutylene, which has proven to be an inferior material in this application, due to frequent failure. Polybutylene services liens are no longer used in drinking water system. In July 2002, the Timber Ridge Homeowner's Association informed the Utilities Depat Lnient that they have planned road resurfacing improvement project along Timber Ridge Trail, Fox Trail and Fox Run streets. They request that any utility work, which would involve cutting the pavement, be done as soon as possible so as to avoid ruining the new pavement surface. ANAT.YSJS• Approximately 10% of the single and double polybutylene water service lines that serve 228 meters have failed within the last several years requiring emergency replacements by the County's Utility personnel. Some of the repairs were made after hours requiring overtime compensation and at great cost and inconvenience to our customers. Since it would be only a matter of time before all remaining water services fail and require replacement, the Utilities Depaitnient believes it is prudent to be proactive and replace them in an orderly and timely manner as part of the scheduled line and replacement program. The Department has had success stories in other communities in replacing polybutylene services including Cambridge Park and Bent Pine. The Utilities Department has reviewed the available options for replacement and determined the best way to effect the replacement was to use the Utility Department Labor Contractor. The material for the project would be directly purchased by the Utility. This decision was made based on man-hour availability of Utility maintenance crews, continuity of work, existing water table conditions and customer inconvenience. An analysis of the replacement of all water services serving the 228 existing meters revealed that the total cost of labor and materials for this project would oe approximately 5286,367.45 (see Attachment 1). SEPTEMBER 10, 2002 41 f