CC MEETING: December 3, 2024
DATE: November 18, 2024
TO: Erin Rinehart, City Manager
FROM: Jonathan Wheat, P.E., Director of Engineering
Shannon Hicks, Assistant City Manager
Title
Consider A Resolution Authorizing The City Manager To Negotiate And Execute Contract Change Amendment No. 3 With HDR Engineering, Inc. For The Dudley Branch Channel Improvements Project In An Amount Not To Exceed $45,000 For A Revised Contract Amount Not To Exceed $593,949.00.
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BACKGROUND:
The City of Carrollton has an existing contract with HDR Engineering, Inc. for the evaluation and drainage improvements recommendations for Dudley Branch Channel Improvements. The existing design contract with HDR was approved by council on Match 6th, 2018.
Contract amendments No. 1 and No. 2 provided for alternative analysis of flood alleviation strategies of the Lower Dudley Branch.
HDR Engineering Inc is currently under contract with the City of Carrollton to perform a flood study for Dudley Branch between Taos Pond and the DART railroad tracks which includes an evaluation of flood mitigation options focusing on Indian Creek Drive and inundation on Frankford Road. This proposed Change Amendment No. 3 would be to determine if the Dudley Branch culvert crossing at Eisenhower Street are sized sufficiently, as well as identify the impact of the Elm Fork backwater through this area. This site is a critical location along the Dudley Branch Channel as all upstream flows pass through the culverts, and the culverts are near several residential neighborhoods. Evaluating the performance of the Eisenhower culverts for the 5-, 10-, 25- and 100-year storm events will determine if any future drainage improvements are needed at that location.
FINANCIAL IMPLICATIONS:
This change amendment consists of an additional $45,000.00 which increases the current contract from $548,949.00 to $593,949.00, a total 52.3% increase from the original contract amount of $390,000.000. Funding for the additional qu...
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