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Avondale Estates schedules Dewberry presentation after consultant flags Southwoods dam and stormwater repairs
Summary
City staff said consultant recommendations to stabilize the Southwoods slope, install seepage controls and replace a failing stormwater pipe are required to protect Lake Avondale’s dam; a detailed Dewberry presentation and proposed design contract are scheduled for the board’s May 13 meeting and staff said cost estimates are not yet available.
City staff told the board at a work session on April 22 that consultant Dewberry has recommended three staged interventions to preserve the structural integrity of the Southwoods slope and the Lake Avondale dam: slope stabilization that will require removal of some trees planted within the wildlife sanctuary footprint; installation of a seepage-control device beneath Wilshire Road; and full replacement of a deteriorated stormwater pipe on the lake’s west side.
Staff said the work is necessary to maintain the dam’s structural integrity but that the full cost of the three proposed stages is not yet known. A detailed presentation by Dewberry, with engineering analysis and a proposed design contract for the board’s consideration, is scheduled for the regular meeting on May 13. City staff said they will present design options, anticipated impacts and funding alternatives at that meeting and invited board members to submit questions in advance.
During the work session residents urged the city to consider a lake-silt/dredging study and asked whether undergrounding of power lines would trigger additional land-disturbance concerns; staff clarified the current Southwoods scope is focused on dam/stormwater stabilization and that lake-dredging or other lake-related projects will be discussed separately in upcoming capital-workshop items.
Next steps: Dewberry will present detailed engineering findings on May 13 and staff will propose a design contract and funding options at that time; the board flagged the item for more detailed capital-funding discussion at the city’s spring workshop.
