Title
Resolution to Approve a Construction Contract with Anglin Civil, LLC for the Bird Road Retaining Wall Project, ITB No. 4611 ($207,330.00) and Appropriate Funding for the Project ($306,000.00) (8 Votes Required)
Memorandum
Attached for your review and approval, please find a resolution that appropriates funding and approves a construction contract between Anglin Civil, LLC and the City of Ann Arbor for the Bird Road Retaining Wall project.
Project Description:
The City of Ann Arbor is planning to replace the existing nonreinforced, stacked stone retaining wall along the northerly side of Bird Road between Newport Road and West Huron River Drive. The existing stone retaining wall and slope has deteriorated, thus the wall needs to be replaced and the slope requires restoration.
The existing stone wall is being replaced with a wire-formed retaining wall system. The wire-formed retaining wall system provides an aesthetic alternative to conventional concrete and segmental block retaining walls, replacing them with natural, landscaped, sloping structures nearly indistinguishable from native terrain.
As part of this project, the existing stacked stone wall will be salvaged, cleaned and reused in front of the new wire-formed retaining wall; this is intended to maintain the existing natural character of the Bird Road corridor. The new wall will utilize an anchor tieback support system that will be driven into the earth behind the wall to provide support and stabilize the slope. The proposed driven earth anchor tiebacks will greatly reduce the need for the removal of vegetation and trees that are located within the Bird Road Right-of-Way, near the residential property.
The anchor lengths necessary to provide a stable retaining wall will extend under the ground surface within the Bird Road Right-of-Way. No additional permanent easements or right-of-way was necessary for the driven anchor tiebacks. The anchors will not impact the surface use of the adjacent ...
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