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Request for approval of Change Order #005 for Project 1107 - North Avenue between Mayfair Road and Met-to-Wee Lane for rock excavation
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Submitted by:
Nick Deming
Department:
Engineering
A. Issue
Request to approve Change Order #005 for Wauwatosa Project #1107 to compensate Vinton Construction for performing rock excavation discovered during the installation of the water main and storm sewer.
B. Background/Options
The North Avenue project between Mayfair Road and Met-to-Wee Lane is a joint project between the City of Wauwatosa and the Wisconsin Department of Transportation. The project is jointly funded and the contract is being administered by the Wisconsin Department of Transportation.
During installation of the water main and storm sewer, bed rock was encountered and required removal to install these utilities at plan grades. The contractor needed to use an extra excavator with a breaker on it to loosen the rock so that it could be removed. Removing the bed rock required additional equipment in addition to slowing down the production of pipe footage placed on these days. Rock excavation occurred between 107th St. and 104th St. on 5/4/23, 5/5/23, 5/8/23, 8/18/23, 8/21/23, 8/24/23, 8/29/23, and 9/7/23.
C. Strategic Plan (Area of Focus)
Area of focus: Infrastructure
D. Fiscal Impact
As a joint project, the funding for the project is 80% funded by the Wisconsin Department of Transportation and 20% funded by the City of Wauwatosa up to an amount capped per the original funding request from 2019. The low bid awarded exceeded this cap threshold and any amount spent above the cap are fully incurred by the City of Wauwatosa.
Vinton Construction submitted a price of $332.30/CY as an additional cost to perform rock excavation. The financial impact is an additional cost of $109,193.78 based on the removal of 328.60 CY of bed rock.
E. Recommendation
Accept the unit price of $332.30/CY for rock excavation for an additional cost of $109,193.78.
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