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City staff: $711,000 ADEM contribution will fund Langan Park dredging and upstream stormwater fixes
Summary
Mobile City Council heard details of a cooperative agreement with the Alabama Department of Environmental Management that will supply $711,000 toward dredging at Langan Park and related stormwater improvements; bid opening set for Feb. 19.
City staff told the Mobile City Council at a pre-meeting Feb. 11 that the Alabama Department of Environmental Management will contribute $711,000 toward a Langan Park lake dredging project and related stormwater work.
The money will help fund dredging and rehabilitation of an outdated open concrete ditch that channels stormwater off Ziegler Avenue. City staff said material removed from the lake will be reused on-site to rebuild the ditch using a natural stream design intended to trap sediment before it reaches the lake. "This is $711,000 that's being contributed to part of the project that we're doing for Langan Dredging," said Jen, a city staff member who briefed the council.
The council was told the project will combine green and gray infrastructure: engineers will use geotubes to hold a portion of dredged spoil on-site and will add stone stabilization so the channel can withstand heavy storms. "It's gonna be designed to trap sediment to stop the lake from refilling the sediment," Jen said, adding the design firm is Geosyntec. She also said the work will be monitored and maintained after construction.
City staff said the funding arrangement is part of an EPA program administered through the state, and that the bid opening for the work is scheduled for Feb. 19. After bids are opened and a contract awarded, staff said dredging would proceed as soon as the procurement and contracting steps are complete.
Council members asked about long-term durability and how the project will handle high-velocity storms; staff replied the design accounts for large storm events and includes stabilization with large stone and ongoing monitoring. The council did not vote on a contract during the pre-meeting; staff framed the presentation as an update on a cooperative agreement and the procurement timetable.
Next steps listed by staff include the Feb. 19 bid opening, award of a construction contract, and mobilization for dredging and stormwater feature reconstruction.
