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Council hears residents’ runoff concerns; staff says developers must meet rate and quality controls
Summary
Residents raised stormwater runoff concerns related to a proposed Taylor Park-area development; staff said the watershed district, engineers and required rate/quality controls will govern on-site design and that some existing upstream conditions on private property cannot be retroactively corrected by development approvals.
Several residents at the planning commission level had raised worries about runoff from an existing property and how a proposed Taylor Park-area development could affect neighbors; councilmembers heard an update from staff describing the regulatory review process and limits on what the city can require of non‑developed private parcels.
Councilmember Claudia Lacey summarized residents’ concerns about rapid outflows from a culvert and said the Minnehaha Creek Watershed District and the city's engineers would review rate and water-quality controls in the developer’s plans. City staff confirmed developers must provide rate-control (limits on the speed/volume of runoff) and water-quality measures before discharging to downstream waterways.
Staff explained that existing properties that have not yet developed (for example, a privately owned property that currently sends rapid flows across a culvert) are generally "grandfathered"—the city cannot require immediate retrofitting of upstream private property unless the owner is proposing new development. Instead, the city's controls apply to the new development: the developer must design on-site detention and water-quality systems so downstream properties are not worsened. The planning commission had tabled a prior submittal pending receipt of complete engineering materials; staff said that when the developer returns with full engineering plans, the city and watershed district will continue review and require mitigation where appropriate.
Councilmembers said the city will insist that new site plans not increase runoff impacts to adjacent lakefront properties and emphasized staff's obligation to require appropriate stormwater ponds, drains and catch basins when development occurs. No formal council action was taken; staff will continue coordinating with the watershed district and engineers and the developer as plans are completed.
What’s next: the developer must submit full engineering plans; the planning commission and staff will continue review and the council will see the item again when the application is complete.
