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File #: 19-1742    Version: 1 Name: 10/7/19 Change Order #2 for Gerace for Geddes Dam Gate
Type: Resolution Status: Passed
File created: 10/7/2019 In control: City Council
On agenda: 10/7/2019 Final action: 10/7/2019
Enactment date: 10/7/2019 Enactment #: R-19-442
Title: Resolution to Approve Construction Contract Change Order No. 2 ($281,416.90) with Gerace Construction Company, Inc. for the Geddes Dam Gate Recoating and Repairs Project, and Amend the Project Budget
Attachments: 1. Gerace_Geddes Gate_Change Order No 2_20190910.pdf, 2. ITB and Contract for Gerace.pdf
Related files: 19-1469
Title
Resolution to Approve Construction Contract Change Order No. 2 ($281,416.90) with Gerace Construction Company, Inc. for the Geddes Dam Gate Recoating and Repairs Project, and Amend the Project Budget
Memorandum
This memorandum and resolution requests approval to award contract change order No. 2 ($281,416.90) to Gerace Construction Company, Inc. (Gerace), and to amend the project budget as part of the Geddes Dam Gate Recoating and Repairs Project (Resolution R-19-195). Change order No. 2 is the additional cost to replace three gates at Geddes Dam in lieu of attempting to repair them.

Geddes Dam, originally constructed in 1920, is a recreational dam on the Huron River located near the Gallup Park Path Parking off of Old Dixboro Road in Ann Arbor, MI, 48105. The Geddes Dam provides the Gallup impoundment and the layout of Gallup Park is predicated on the dam. Each year, approximately 30% of Livery business, or roughly $300,000 is recognized through "pond paddles" - boating activity in an impoundment area. The dam is operated and maintained by the City of Ann Arbor Water Treatment Services Unit.

Based on the Geddes Dam Safety Inspection performed by the State of Michigan Dam Safety Unit in 2016, recommendations were made to rehabilitate spillway gates no. 1, 2 and 3 and extend the service life. The extent of the corrosion to the gates could not be explicitly determined in the field, therefore the original scope of this project included the removal of the existing gates, followed by abrasive blasting and structural inspection of the gates. The structural inspection of Gate 3 was performed on July 30, 2019. The inspection identified major issues including significant section loss of structural steel members due to advanced corrosion, bent steel members, excessive wear and failed components. It is evident that Gates 1 and 2 are in similar or worse condition.

Due to the significant deterioration and structural issues, repair of the gates as originall...

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