Title
Consider a resolution authorizing the Mayor to execute Quantity Adjustment/Change Order No. 2 with Thalle Construction Co. Inc. for the BCRWWS - East Plant Expansion to 30 MGD Project.
Body
The Brushy Creek Regional Wastewater System (BCRWWS) East Plant Expansion to 30 million gallons per day (MGD) is a regional project with Round Rock along with the other owners of the regional system, Austin and Cedar Park. Leander is buying into the treatment ownership with their participation in this project. The percentage participation by each City is shown below. The expansion project is to be completed in approximately June 2023.
This is Change Order No. 2 for the BCRWWS East Plant Expansion to 30 MGD provides a myriad of plant improvements which includes an improved treatment process among others. The process change allows the plant to more reliably achieve the more stringent permit limits in its most recent revised permit. The project also adds improved headworks and odor control. Thalle Construction was awarded the contract by City Council on April 9, 2020 and work started June 1, 2020.
This change order has additional cost to maintain five back-up generators (as secondary power if it was needed), and additional temporary piping to run the belt filter presses. Deduct items included a credit for reducing the epoxy liner thickness, and eliminating pressure dampers. There are 14 other smaller changes. This change order also adds 24 calendar days to the contract time of 1,032 calendar days bringing the total contract time to 1,056 calendar days. The project remains on schedule.
Percentage participation in this project and total for this change order by each City:
Round Rock 12.0% $ 9,992.04
Austin 24.7% $20,566.95
Cedar Park 21.0% $17,486.07
Leander 42.3% $35,221.93
Original award $107,351,712.60
Change Order No. 1 $ 615,302.02
Change Order No. 2 (this change order) $ 83,266.99
Total Contract Amount $108,050,281.61
Cost: $83,266.99
Source of Funds: Regional Wastewater Projects