Difference between revisions of "MIDS design sequence flow chart"
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PREVIOUS QUESTION and ANSWER: Does project create one acre or more of new and/or fully reconstructed impervious surfaces? '''Answer''' - Yes | PREVIOUS QUESTION and ANSWER: Does project create one acre or more of new and/or fully reconstructed impervious surfaces? '''Answer''' - Yes | ||
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Revision as of 13:20, 28 December 2021
Contents
Box 1
Did you gather the site information necessary to proceed through the flow chart?
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
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
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.
Box 4
Does project create one acre or more of new and/or fully reconstructed impervious surfaces?
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?
PREVIOUS QUESTION and ANSWER: Does project create one acre or more of new and/or fully reconstructed impervious surfaces? Answer - Yes
Box 7
Are there constraints due to lack of available ROW, off site drainage and/or rate control requirements?
Box 8
Is Flexible Treatment Option (FTO) 2 feasible?
PREVIOUS QUESTION and ANSWER: Are there restraints due to lack of available right-of-way, off-site drainage, and/or rate control requirements? Answer: Yes
Box 9
Select Flexible treatment Option 2. You have completed the flow chart.
- Provide documentation of offsite runon to project area
- Provide documentation of lack of right-of-way
Flexible Treatment Option 2 (FTO #2)
Applicant attempts to comply with the following conditions:
- Achieve volume reduction to the maximum extent practicable (as determined by the Local Authority), and
- Remove 60 percent of the annual total phosphorus load, and
- Options considered and presented shall examine the merits of relocating project elements to address varying soil conditions and other constraints across the site.
PREVIOUS STEP: It was determined that the site is linear, there are constraints due to lack of right-of-way or off/site drainage and/or rate control requirements, and a reasonable effort to acquire all of the right-of-way cannot be made.
Box 10
SELECT FLEXIBLE TREATMENT OPTION 3
Off-site mitigation (including banking or cash or treatment on another project, as determined by the local authority) equivalent to the volume reduction performance goal can be used in areas selected in the following order of preference:
- Locations that yield benefits to the same receiving water that receives runoff from the original construction activity.
- Locations within the same Department of Natural Resources (DNR) catachment area as the original construction activity.
- Locations in the next adjacent DNR catchment area up-stream.
- Locations anywhere within the local authority's jurisdiction.
PREVIOUS QUESTION: It was determined that Flexible Treatment Option 2 is not feasible.
Box 11
Are there zoning and land use requirements that make the Performance Goal not feasible?
PREVIOUS QUESTION and ANSWER:
- Is the project linear? Answer: No
or
- Are there constraints due to lack of available ROW, off site drainage and/or rate control requirements? Answer: No
Links
- Return to Flexible treatment options
- Return to Design sequence flow chart
- Return to List of flow chart questions