Line 46: Line 46:
  
 
===Is the project linear?===
 
===Is the project linear?===
 +
*[[Design sequence flow chart#Are there constraints due to lack of available ROW, off site drainage and/or rate control requirements?|Yes]]
 
*[[Design sequence flow chart#Are there zoning and land use requirements that make the Performance Goal not feasible?|No]]
 
*[[Design sequence flow chart#Are there zoning and land use requirements that make the Performance Goal not feasible?|No]]
*[[Design sequence flow chart#Are there constraints due to lack of available ROW, off site drainage and/or rate control requirements?|Yes]]
 
  
_________________________________________________________
+
 
 +
<font size=5>_________________________________________________________</font size>
 +
 
 +
===Are there constraints due to lack of available ROW, off site drainage and/or rate control requirements?===
 +
*[[Design sequence flow chart#Can a reasonable effort to acquire all of the ROW be accomplished?|Yes]]
 +
*[[Design sequence flow chart#|No]]
 +
 
 +
<font size=5>_________________________________________________________</font size>
 +
 
 +
===Can a reasonable effort to acquire all of the ROW be accomplished?===
 +
*[[Design sequence flow chart#|Yes]]
 +
*[[Design sequence flow chart#Is FTO Alternative Number 2 feasible?|No]]
 +
 
 +
<font size=5>_________________________________________________________</font size>
 +
 
 +
===Is FTO Alternative Number 2 feasible?===
 +
[[Design sequence flow chart#Select FTO Alternative 2 (linear projects)|Yes]]
 +
[[Design sequence flow chart#Select FTO Alternative 3 (linear projects, zoning/land use requirements|No]]
 +
 
 +
<font size=5>_________________________________________________________</font size>
 +
 
 +
===Select FTO Alternative 2 (linear projects===
 +
{{alert|Select FTO Alternative 2. Provide documentation of off-site run-on to project area.  Provide documentation of lach of ROW|alert-info}}
 +
 
 +
<font size=5>END<br>
 +
_________________________________________________________</font size>
 +
 
 +
===Select FTO Alternative 3 (linear projects, zoning/land use requirements)===
 +
{{alert|Provide soil survey, maps, regulations, and/or cost estimates documenting that meeting the original performance goal or FTO alternatives is not feasible in addition to other documentation as required by LGU|alert-info}}
 +
 
 +
<font size=5>END<br>
 +
_________________________________________________________</font size>
  
 
===Are there zoning and land use requirements that make the Performance Goal not feasible?===
 
===Are there zoning and land use requirements that make the Performance Goal not feasible?===

Revision as of 22:00, 14 November 2013

This is intended to take you through a design sequence that allows you to determine the appropriate performance goal at a site. Follow the questions below sequentially to arrive at a performance goal appropriate for your site.

Information: NOTE: when you click on an answer (No or Yes), the next question in the sequence will be at the top of the page.

Preliminary information

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, 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

Define treatment goal

  • 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



Begin Flow chart


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

MIDS performance goal does not apply

Information: The MIDS performance goal does not apply

END
_____________________________________________________

Is the project linear?


_________________________________________________________

Are there constraints due to lack of available ROW, off site drainage and/or rate control requirements?

_________________________________________________________

Can a reasonable effort to acquire all of the ROW be accomplished?

_________________________________________________________

Is FTO Alternative Number 2 feasible?

Yes No

_________________________________________________________

Select FTO Alternative 2 (linear projects

Information: Select FTO Alternative 2. Provide documentation of off-site run-on to project area. Provide documentation of lach of ROW

END
_________________________________________________________

Select FTO Alternative 3 (linear projects, zoning/land use requirements)

Information: Provide soil survey, maps, regulations, and/or cost estimates documenting that meeting the original performance goal or FTO alternatives is not feasible in addition to other documentation as required by LGU

END
_________________________________________________________

Are there zoning and land use requirements that make the Performance Goal not feasible?


Is the site located in a DWSMA, wellhead protection area, or within 200 feet of a drinking water well?

DWSMA1

  • Select Flexible Treatment Option
  • (FTO) Alternative No. 2
  • Revise Treatment Goal
  • No infiltration practices allowed
  • Provide DWSMA or well location map

next

Utilities, structures, land use requirements

Are there existing or proposed utilities, structures, or land use requirements (density, parking, setbacks, etc.) that make the Treatment Goal infeasible or cost prohibitive?

Utilities1

Is BMP relocation possible?

Utilities2

Are Flexible Treatment Option Alternatives number 1 or number 2 feasible?

Utilities3

Investigate Off-Site Considerations:

  1. Banking within watershed with goal of:
  • Linear: 0.55 inches over impervious
  • Nonlinear: 1.1 inches over impervious
  1. Cash as determined by LGU

Provide site survey, maps, regulations, and/or cost estimates documenting infeasibility and cost-prohibitive nature of meeting the original Treatment Goal or FTO Alternatives

END

Utilities4

  • Select Flexible Treatment Option Alternative No. 1 or No. 2
  • Revise Treatment Goal
  • Provide site survey, maps, regulations, and/or cost estimates documenting infeasibility and cost-prohibitive nature of meeting the original Treatment Goal

next

Karst, shallow groundwater, shallow bedrock