CC MEETING: June 20, 2023
DATE: June 12, 2023
TO: Erin Rinehart, City Manager
FROM: Jonathan Wheat, P.E., Director of Engineering
Marc Guy, Assistant City Manager
Title
Consider Authorizing The City Manager To Execute Change Order No. 1 With A&B Construction, LLC For Additional Work Related To The Crosby Road Tract Drainage Improvements Project And The Crosby At Broadway Sidewalk Project In An Amount Not To Exceed $82,779.60, Increasing The Total Project To An Amount Not To Exceed $1,331,120.60.
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BACKGROUND:
There is an existing drainage culvert south of Crosby Road under the freight railroad tracks that is severely undersized to accommodate the stormwater flow it receives. The tracks are owned by DART and used by the DG&NO Railroad. The area immediately upstream of the culvert is the Carroll Crest residential development, which is currently under construction. To develop the property, the undersized culvert had to be replaced in order to eliminate the stormwater bottleneck at the railroad tracks and associated upstream ponding.
A drainage study performed by the engineering firm TNP identified the necessary improvements to address the bottleneck conditions under the railroad tracks and the associated overtopping of the rail. The engineering firm of Pacheco Koch designed the construction plans in accordance with the findings from the drainage study and input from DART. A&B Construction was awarded the bid for the construction of the culverts and began construction of the project in the fall of 2021.
The items below need to be added to the construction contract to ensure the project is completed in a satisfactory and sustainable manner.
Change Order No. 1 addresses the following issues:
* Installation of 8" Water Valves - This item reflects a change to install additional water valves on the 8" water main that parallels the property on the west side. The water main was lowered, and the additional valves will allow the main to be shut down on...
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