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DeKalb PWI approves phase 2 of stormwater master plan to study Peachtree Creek watersheds
Summary
The committee approved a change order to expand the county’s stormwater master plan with Arcadis US Inc., increasing funds and extending the term to cover detailed watershed-level analysis for the North Fork and South Fork of Peachtree Creek, including studies that could inform green infrastructure pilots and retention-pond decommissioning.
DeKalb County’s Public Works department secured approval on Oct. 7 to expand the stormwater master plan into a second phase focused on the North Fork and South Fork of Peachtree Creek.
The approved change order with Arcadis US Incorporated increases scope, funding (not to exceed $1,175,500) and extends the contract term through June 30, 2027. Director Lemke described phase 2 as a detailed watershed-level analysis that will produce capital-improvement program recommendations; it will not produce construction documents but will identify projects that can be carried forward into design and construction phases.
Commissioners asked about pilot green-infrastructure measures — rain gardens, bioswales and street-level swales — and about decommissioning retention ponds to reduce long-term maintenance costs. Staff said Arcadis has preliminary drawings and that legal/ownership constraints on some candidate sites must be resolved before implementation; staff will return with cost estimates and next steps.
Why it matters: Phase 2 could identify targeted capital projects to reduce flooding, improve water quality and reduce county maintenance costs, particularly if some retention ponds are decommissioned or replaced with green infrastructure.
Next steps: staff to obtain engineering cost estimates from Arcadis for pilot sites, investigate ownership/operation constraints and return to the committee with funding recommendations.
