Title
Consider a resolution authorizing the Mayor to execute Supplemental Contract No. 3 with Plummer Associates, Inc. for the Brushy Creek East Regional Wastewater Treatment Plant Expansion to 40 MGD project.
Body
?The City of Round Rock’s wastewater flows into the Brushy Creek Regional Wastewater System (BCRWWS). The regional system is owned by the City of Round Rock, City of Cedar Park, City of Austin, and City of Leander. The BCRWWS consists of two wastewater treatment plants (WWTP), the East WWTP and the West WWTP. The East WWTP is currently under construction to increase the capacity to 30 million gallons per day (MGD), bringing the total treatment capacity of the BCRWWS to 33 MGD.
The City of Round Rock is under contract with Plummer Associates, Inc. for design of another 10 MGD expansion, which will increase the East WWTP capacity to 40 MGD. The project will add a fourth treatment train, two clarifiers, and associated filtration and disinfection. Supplemental Agreement No. 1 added design for rehabilitation of existing treatment structures, equipment, and other components across multiple areas of the plant. Supplemental Agreement No. 2 added services for additional dewatering equipment and other components. The BCE 40 MGD Expansion and Rehabilitation projects are under design and will be bid and constructed together. The City of Round Rock’s cost allocation for the 40 MGD project is 90% and is based on the capacity gained by the project (9 MGD of the 10 MGD expansion). Round Rock’s cost allocation for the Rehabilitation project is 60.76% and is based on existing ownership capacity.
This item is for the approval of Supplemental Agreement No. 3, which includes additional professional services for the East WWTP Rehabilitation project. The additional services include two major items: (1) evaluating solutions for the ragging issues at the plant influent lift stations, and (2) determining existing treatment plant structures and equipment elevations w...
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