STRATEGIC PRIORITY: Transportation & Infrastructure
AGENDA DATE: January 11, 2023
COUNCIL DISTRICT(S): Outside City Limits
DEPARTMENT: Water Utilities Department
EXECUTIVE: Kimberly Bizor Tolbert
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SUBJECT
Title
Authorize Supplemental Agreement No. 5 to the professional services contract with Arcadis CE, Inc. f/k/a Malcolm Pirnie, Inc. to provide additional engineering services associated with water quality improvements at the Elm Fork Water Treatment Plant - Not to exceed $5,784,047.00, from $28,279,359.00 to $34,063,406.00 - Financing: Water Capital Improvement F Fund
Body
BACKGROUND
In June 2006, Dallas Water Utilities (DWU) initiated a study to investigate the cause of water quality concerns in parts of the water distribution system. The study and requisite testing confirmed that the treated water chemically changes as it moves through the water system. Recommendations to stabilize the water included process changes and the implementation of improvements at all three water treatment plants. Three firms, one firm for each water treatment plant, were selected to perform engineering and design services. It was anticipated that each firm would be awarded planned supplemental agreements as work progresses to ensure a targeted approach to design.
One major recommendation from the 2006 study included the implementation of biologically active filtration at each plant. DWU has successfully implemented biologically active filtration at the East Side and Bachman Water Treatment Plants and is working to implement these improvements at the Elm Fork Water Treatment Plant. The next step includes the construction of a new Filter Complex to convert treatment operations, address hydraulic limitations, and upgrade existing infrastructure at the end of its useful life. The Elm Fork Water Treatment Plant located in Carrollton, Texas, is the second largest of the three water treatment plants serving DWU cus...
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