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Title
Ordinance amending the FY 2018/2019 Capital Improvement Projects Budget; Change Order/Amendment No. 1 with Salcedo Group, Inc. for Professional Engineering Services for the Line Condition Assessment of the 60" Camp Wisdom Water Supply Line in the amount of $486,385
Presenter
Gabe Johnson, Director of Public Works
Recommended Action
Approve
Analysis
In February 2018, the City Council approved (18-7551) a contract with Salcedo Group, Inc. (SGI) in the amount of $43,000 plus a 5% contingency of $2,150 for a total of $45,150 for assisting, soliciting and evaluating proposals for the inspection, analysis and repair of the 60" water supply line on Camp Wisdom Road. The City's largest and most important water supply line located along Camp Wisdom Road was 30+ years old. In recent years, it was necessary to repair the line twice, in one case having to impose major restrictions on water usage. The Line is approximately 4.5 miles long and supplies some 70% of the City's water supply.
Salcedo Group, Inc. researched available technologies of qualified large-pipe inspection firms to perform inspection and finite element analysis of large diameter water mains. The inspection technologies were to consist primarily of two types of techniques: acoustic leak detection and electromagnetic inspection. SGI is recommending PURE as the provider for this service.
The current Change Order/Amendment No. 1 in the total amount of $486,385 will allow SGI to provide coordination between the City and Grand Prairie and PURE for the duration of the project. The main objective is to conclude the physical inspection within the City's preferred seasonal window of "winter water usage days". In addition, the PURE analysis will be coordinated with the Camp Wisdom Road Improvement design team for the structural analysis of the 60-inch pipe during and after road construciton. SGi will also provide field survey for lcoating and developing cross-section for PURE's use in ...
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