STRATEGIC PRIORITY: Transportation & Infrastructure
AGENDA DATE: June 28, 2023
COUNCIL DISTRICT(S):|910|DEPARTMENT: Water Utilities Department
EXECUTIVE: Kimberly Bizor Tolbert
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SUBJECT
Title
Authorize a construction services contract for rehabilitation and pumping improvements at Peak Flow Basin C located at the Central Wastewater Treatment Plant - Bar Constructors, Inc., lowest responsible bidder of three - Not to exceed $26,208,700.00 - Financing: Wastewater Capital Improvement F Fund
Body
BACKGROUND
The Central Wastewater Treatment Plant (CWWTP) is the largest of two wastewater treatment plants owned and operated by the City of Dallas. Adequate peak flow storage capacity is necessary to prevent wastewater overflows during peak flow events. The existing peak flow storage facilities consist of Basin A.1, Basin B.1, Basin B.2 and Basin C. There are also locations designated for future peak flow Basin A.2 and Basin D when additional storage capacity becomes necessary.
Peak Flow Basin C is an integral part of the peak flow management system at the CWWTP. It is bounded by Basin B.2 on the north, Basin A.1 on the west, and the Trinity River on the east. Basin C is currently lined with cement treated sand on the bottom and concrete on the side slopes. The existing basin is in poor structural condition with extensive failures and significant vertical offsets at the bottom, wide-spread cracks and concrete rubble on the side slopes and the under-drain system has failed. The failure of the basin lining system has resulted in wastewater infiltration among basins and seepage into the ground. In addition, the existing basin requires constant repairs which increases the likelihood of the basin being out of service during a peak flow event. If this were to occur, it would result in reduced peak flow capacity and potential wastewater overflows. Therefore, it is critical to rehabilitate the existing Pe...
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