Prelimiary information for Design Sequence Flow Chart
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Prelimiary information for Design Sequence Flow Chart

Prior to using the flow chart, gather the following preliminary information.

Conduct site review

Aerial photos and topographic maps
County soil surveys and other soil information as available
County Geologic Atlas
Local groundwater levels
DWSMA and Wellhead Protection maps
FEMA and local floodplain maps
Soil borings and site survey
MPCA listing of potentially contaminated sites
Phase 1 and 2 Environmental Site Assessments
TMDLs and local water quality standards
Wetland delineations, MNRAM assessments, and wetland classifications
Proposed conditions, conceptural/preliminary site design
Local zoning and land use requirements/ordinances, including stormwater rate control requirements
Communication with local landowners, LGU, or others knowledgeable about the site
Site inspection

New and redevelopment projects: Retain on site a volume of 1.1 inches from impervious surfaces
Linear projects: Retain on site the larger of 1.1 inches from all new impervious surfaces or 0.55 inches from all new and fully reconstructed impervious surfaces