Environmental Rules in Minnehaha County, SD (2026)
3 county-level rules, plus city-specific rules for 1 city in Minnehaha County, South Dakota.
Verified from official government sources
Stormwater Management
Any new subdivision in unincorporated Minnehaha County must include a drainage plan under Ordinance MC23-93, Section 9.02. The plan covers on-site detention, drainageways, detention ponds and drainage channels, and needs sign-off from both the Planning Director and the Highway Superintendent before the plat can move forward. Detention ponds and drainageways must be engineered for a 25-year storm.
Minnehaha County Subdivision Drainage Plan Rules
Some RestrictionsMinnehaha County Ordinance MC23-93 (1993 Revised Subdivision Ordinance), § 9.02
All drainage facilities including on-site detention, drainageways, detention ponds and drainage channels shall be shown on the drainage plan and is subject to the approval of the Planning Director and Highway Superintendent. The developer may be required to expand the drainage plan to include other properties within the drainage basin when the County determines that the potential exists for imp...
Erosion Control
Minnehaha County requires an erosion control plan for every subdivision development site under Ordinance MC23-93, Section 10.01. Grading, cut-and-fill work and vegetation stripping must be held to a minimum, and the Planning Director, working with the Minnehaha Conservation District, can order further measures to stop sediment and waste from reaching roads or other property.
Minnehaha County Subdivision Erosion Control Plan
Some RestrictionsMinnehaha County Ordinance MC23-93 (1993 Revised Subdivision Ordinance), § 10.01
Measures used to control erosion on a development site shall, as a minimum, meet the standards and specifications of the Minnehaha Conservation District. Stripping of vegetation, regrading and cut and fill operations should be kept to a minimum, as should the amount of land and the duration of exposure. Whenever feasible, development plans should be made in conformance with topography in order ...
Flood Elevation Requirements
In flood hazard areas of unincorporated Minnehaha County, builders must document the as-built elevation of a structure's lowest floor, including the basement, before framing continues above it. Section R109.1.3 of the county's 2021 International Residential Code amendments (Ordinance MC 62-22) requires a registered design professional to certify that elevation to the Floodplain Administrator, tying every permit back to the 2017 Floodplain Management Ordinance's base flood elevation standard.
Minnehaha County Flood Elevation Certification
Some Restrictions2021 IRC Minnehaha County Amendments § R109.1.3 (Ordinance MC 62-22)
R109.1.3 Floodplain inspections. For construction in flood hazard areas as established by 2017 Floodplain Management Ordinance for Minnehaha County upon placement of the lowest floor, including basement, and prior to further vertical construction, the floodplain administrator shall require submission of documentation, prepared and sealed by a registered design professional, of the elevation of ...
Environmental Rules by City in Minnehaha County
1 cities in Minnehaha County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
All Minnehaha County ordinances
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