2002-055-RES ACCEPT PROPOSAL OF CARTER & BURGESS FOR PROFESSIONAL ENGINEERING SERVICES TO WATER LOST AND UNACCOUNTED FOR STUDY IN CITY'S WATER AND ACCOUNTING AND OPERATING SYSTEM

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J I I I J J I I I I ! ! I 1 I Proposal Comprehensive Water Distribution System Audit Section 3 Relevant Project Experience The Carter & Burgess stoff hove been responsible for the planning, design, and management of 0 wide variety of projects. These projects hove been performed across not only Texas, but around the notion. Representative projects are provided below. Weatherford Water Purification Plant Treated Water Flovv Metering Evaluation Weatherford, Texas The City of Weatherford water deportment employees noticed the City hod on unacceptably high percentage of unaccounted for treated water. The City hired Carter & Burgess, Inc. to investigate the possible causes for this unaccounted for water. The City hod more than 15 percent of its water supply unaccounted for. Normal loss is around 10 percent, while 0 5 percent loss is considered good. The city's water plant produces 8 million gallons of water per day. Carter & Burgess engineers decided the water may not be leaving the system, but that it was not accounted for in the process. Engineers calibrated the water meters and looked at the accounting system. Hurst Water Distribution System Master Plan Hurst, Texas Corter & Burgess, Inc. prepared a Water Distribution System Moster Plan for the City of Hurst which included computerized modeling of the City's water system, 0 written report, software acquisition and training for Hurst Public Works staff. The project was performed to evaluate existing systems and plan for future expansion and growth of the distribution system. The City of Hurst is more than 90 percent built-out and does not anticipate expansion of its current boundaries. The project focused on operational issues such as energy efficiency, reduction of peaking charges for purchased water Carter ::Burgess and quality issues resulting from mixing well water and surface water. A GIS system was linked to the hydraulic modeling software Cybernet, to assist visualizing patterns and trends in water use and compare the outcome of several design scenarios. Our GIS staff developed digitized data of water lines and complete attributing for all features. The project was performed in two parts. Part One involved generalized computer modeling of the Hurst Water Distribution System in order to analyze the system's operational efficiency and determine the most cost-effective system enhancements. This phase included data collection from water system mops, topographic mops, land use mops, previous water distribution system master plans, water-use studies, population figures and as-built construction plans. Next, water usages were analyzed; and a model was created for evaluating the system. A future system model was developed to reflect projected system changes in configuration, operations and water demand. Our engineers then selected various operational scenarios for analysis by computer modeling and then prepared a report which outlined the results of the analysis. Designated Public Works stoff were trained on the details ofthe water system modeling on an ongoing basis throughout the development of the study. Training for basic manipulation of the data in the system was also provided. Part Two of the project required Corter & Burgess to address the City's ability to meet current and proposed state and federal water quality regulations, and conduct 0 park irrigation study. Regulatory issues evaluated included Lead and Copper Rule, Surface Water Treatment Rule, Information Collection Rule, Disinfection and Disinfection By-product Rule, and Enhanced Surface Water Treatment Rule. For the park irrigation study, alternative sources of irrigation were investigated for three City of Hurst parks. Engineers investigated treated wastewater effluent and local water well supplies os potential sources of irrigation, reviewed the potential availability of such sources, and prepared a report 6 ..I