Title
Resolution to Appropriate Funding ($327,000.00) and Approve a Construction Contract with Anlaan Corporation for the Watershed Drive Retaining Wall, ITB No. 4510 ($241,875.10) (8 Votes Required)
Memorandum
Attached for your review and approval, please find a resolution that appropriates funding and approves a construction contract between Anlaan Corporation and the City of Ann Arbor for the Watershed Drive Retaining Wall project.
Budget/Fiscal Impact
The total cost of this project is anticipated to be approximately $327,000.00, which includes construction, contract administration, and inspection. Due to difficulties obtaining the required easement from one of the adjacent property owners, this project had been placed on hold and the previously budgeted funding was returned to the Local Street fund balance, necessitating an appropriation from fund balance.
Project Description
The City of Ann Arbor is planning to replace the existing wooden retaining wall along the westerly side of Watershed Drive between Narrow Gauge Way and Watershed Court. The existing wooden retaining wall is heavily deteriorated and has been repaired several times. The structural support is no longer in a condition that additional repairs would be effective, thus the wall is being replaced with a segmental block retaining wall.
Staff met with adjoining residents to discuss options for the retaining wall replacement. The City of Ann Arbor held a public meeting on Tuesday, July 12, 2016 to discuss available options with residents. This public meeting provided the opportunity to gauge neighborhood preferences for the style of block, and to discuss other alternatives.
As part of this project, a modular block retaining wall will be retrofitted in front of the existing wooden retaining wall. The new wall will utilize an anchor tieback support system that will be driven into the earth behind the wall. The proposed driven earth anchor tiebacks will greatly reduce the need for the...
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