MIDS design sequence flow chart

Box 1

Did you gather the site information necessary to proceed through the flow chart?

Yes

No or Unsure

Box 2

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

• Conduct site review
• Define performance goal

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, conceptual/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

PROCEED TO THE NEXT STEP

Box 3

• 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 or 0.55 inches from all new and fully reconstructed impervious surfaces

PROCEED TO THE FIRST QUESTION

Links

• Performance goals for new development, re-development and linear projects
• For background and derivation of the performance goals, see technical documents and presentations on the MIDS website. We provide links to some of these documents and presentations below.
  • Preliminary Performance Goal Alternatives Evaluation
  • Assessment of MIDS Performance Goal Alternatives: Runoff Volumes, Runoff Rates, and Pollutant Removal Efficiencies
  • Credit Methodology System Review
  • Performance goal review

Box 4

Does project create one acre or more of new and/or fully reconstructed impervious surfaces?

• Yes

• No

PREVIOUS QUESTION and ANSWER: The previous question defined the performance goals.

Box 5

MIDS PERFORMANCE GOAL DOES NOT APPLY
The project creates less than 1 acre of impervious surface.

Box 6

Is the project linear?

Example of a linear project

Yes

No

PREVIOUS QUESTION and ANSWER: Does project create one acre or more of new and/or fully reconstructed impervious surfaces? Answer - Yes