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| − | 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.
| + | [[File:Wiki flow chart sequence.png|100px|thumb|alt=image of flow chart used for wiki|<font size=4>[https://stormwater.pca.state.mn.us/index.php?title=MIDS_design_sequence_flow_chart Launch flow chart]</font size>]] |
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| − | {{alert|NOTE: when you click on an answer (No or Yes), the next question in the sequence will be at the top of the page.|alert-info}}
| + | A flow chart was developed to determine the appropriate performance goal or Flexible Treatment Option for a new development, redevelopment, or linear site. You may access a pdf version of the flow chart ([[File:Final MIDS Flow chart.pdf]]) or follow the flow chart through the sequence of questions using the [https://stormwater.pca.state.mn.us/index.php?title=MIDS_design_sequence_flow_chart Manual website]. |
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| − | ==Preliminary information==
| + | If you would like a copy of the flowchart in Visio, so that you can edit it, please contact us. |
| − | Prior to using the flow chart, gather the following preliminary information.
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| − | *Conduct site review
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| − | *Define performance goal
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| − | ===Conduct site review===
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| − | *Aerial photos and topographic maps
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| − | *County soil surveys and other soil information as available
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| − | *County Geologic Atlas
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| − | *Local groundwater levels
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| − | *DWSMA and Wellhead Protection maps
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| − | *FEMA and local floodplain maps
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| − | *Soil borings and site survey
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| − | *MPCA listing of potentially contaminated sites
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| − | *Phase 1 and 2 Environmental Site Assessments
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| − | *TMDLs and local water quality standards
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| − | *Wetland delineations, MNRAM assessments, and wetland classifications
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| − | *Proposed conditions, conceptural/preliminary site design
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| − | *Local zoning and land use requirements/ordinances, including stormwater rate control requirements
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| − | *Communication with local landowners, LGU, or others knowledgeable about the site
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| − | *Site inspection
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| | | | |
| − | ===Define treatment goal===
| + | [[Category:Level 2 - Management/MIDS]] |
| − | *New and redevelopment projects: Retain on site a volume of 1.1 inches from impervious surfaces
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| − | *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
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| | + | <!-- |
| | + | ==Using the wiki version of the flow chart== |
| | + | The wiki version of the flow chart takes you through a series of questions and steps to ultimately arrive at a performance goal. The wiki version does not necessarily take you through each step shown in the pdf version of the flow chart. The structure of the wiki version differs from the pdf version of the flow chart. You can see the structure used for the wiki version at [[List of flow chart questions|this link]]. |
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| | + | If you proceed through the flow chart using the wiki, we recommend you create a book to document the steps in the process. |
| | + | *On the left Toolbar, click '''Create a Book'''. |
| | + | *If you have created a book previously, that book may still be in memory. In this case, you will get a message asking if you want to use the previous book or start a new book. |
| | + | *Click on '''Start book creator''' |
| | + | *Click on '''Add this page to your book''' |
| | + | *Answer the question |
| | + | *Click on '''Add this page to your book''' |
| | + | *Answer the question |
| | + | *Continue adding the page to your book and then answering the question until you have completed the flow chart |
| | + | *Upon completing the flow chart, create a pdf document from your book and save it to your computer. |
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| − | | + | Note that you cannot control the formatting of the book you create within the wiki. You can export the book as a pdf document and edit the pdf document. |
| − | | + | --> |
| − | <font size=5>[[Design sequence flow chart#Does the project create one acre or more of new and/or fully reconstructed impervious surfaces?|Begin Flow chart]]</font size>
| + | ==Flow chart links== |
| − | | + | *[https://stormwater.pca.state.mn.us/index.php?title=MIDS_design_sequence_flow_chart Launch flow chart] |
| − | | + | *[[Prelimiary information for Design Sequence Flow Chart|Preliminary information for Design Sequence Flow Chart]] |
| − | ===Does the project create one acre or more of new and/or fully reconstructed impervious surfaces?===
| + | *Overview of [[List of flow chart questions|flowchart questions]]. |
| − | *[[Design sequence flow chart#MIDS performance goal does not apply|No]]
| + | *pdf version of the flow chart: [[File:Final MIDS Flow chart.pdf]] |
| − | *[[Design sequence flow chart#Is the project linear?|Yes]]
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| − | | |
| − | ===MIDS performance goal does not apply===
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| − | {{alert|The MIDS performance goal does not apply|alert-info}}
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| − | <FONT SIZE=5>END<br>
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| − | _____________________________________________________</font size>
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| − | ===Is the project linear?===
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| − | *[[Design sequence flow chart#Are there constraints due to lack of available ROW, off site drainage and/or rate control requirements?|Yes]]
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| − | *[[Design sequence flow chart#Are there zoning and land use requirements that make the Performance Goal not feasible?|No]]
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| − | <font size=5>_________________________________________________________</font size>
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| − | ===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]]
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| − | *[[Design sequence flow chart#|No]]
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| − | | |
| − | <font size=5>_________________________________________________________</font size>
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| − | ===Can a reasonable effort to acquire all of the ROW be accomplished?===
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| − | *[[Design sequence flow chart#|Yes]] | |
| − | *[[Design sequence flow chart#Is FTO Alternative Number 2 feasible?|No]]
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| − | | |
| − | <font size=5>_________________________________________________________</font size>
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| − | ===Is FTO Alternative Number 2 feasible?===
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| − | [[Design sequence flow chart#Select FTO Alternative 2 (linear projects)|Yes]]
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| − | [[Design sequence flow chart#Select FTO Alternative 3 (linear projects, zoning/land use requirements|No]]
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| − | <font size=5>_________________________________________________________</font size>
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| − | ===Select FTO Alternative 2 (linear projects===
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| − | {{alert|Select FTO Alternative 2. Provide documentation of off-site run-on to project area. Provide documentation of lach of ROW|alert-info}}
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| − | <font size=5>END<br>
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| − | _________________________________________________________</font size>
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| − | | |
| − | ===Select FTO Alternative 3 (linear projects, zoning/land use requirements)===
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| − | {{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}}
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| − | <font size=5>END<br>
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| − | _________________________________________________________</font size>
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| − | ===Are there zoning and land use requirements that make the Performance Goal not feasible?===
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| − | *[[Design sequence flow chart#Is the site located in a DWSMA, wellhead protection area, or within 200 feet of a drinking water well?|No]]
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| − | ===Is the site located in a DWSMA, wellhead protection area, or within 200 feet of a drinking water well?===
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| − | *[[Design sequence flow chart#DWSMA1|Yes]] | |
| − | *[[Design sequence flow chart#Utilities, structures, land use requirements|No]] | |
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| − | ====DWSMA1====
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| − | *Select Flexible Treatment Option
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| − | *(FTO) Alternative No. 2
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| − | *Revise Treatment Goal | |
| − | *No infiltration practices allowed
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| − | *Provide DWSMA or well location map
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| − | [[Design sequence flow chart#Utilities, structures and land use requirements|next]]
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| − | ===Utilities, structures, land use requirements===
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| − | Are there existing or proposed utilities, structures, or land use requirements (density, parking, setbacks, etc.) that make the Treatment Goal infeasible or cost prohibitive?
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| − | *[[Design sequence flow chart#Utilities1|yes]]
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| − | *[[Design sequence flow chart#Karst, shallow groundwater, shallow bedrock|no]]
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| − | | |
| − | ====Utilities1====
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| − | Is BMP relocation possible?
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| − | *[[Design sequence flow chart|Karst, shallow groundwater, shallow bedrock|yes]]
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| − | *[[Design sequence flow chart|Utilities2|no]]
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| − | | |
| − | ====Utilities2====
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| − | Are Flexible Treatment Option Alternatives number 1 or number 2 feasible?
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| − | *[[Design sequence flow chart#Utilities4|yes]]
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| − | *[[Design sequence flow chart#Utilities3|no]]
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| − | | |
| − | ====Utilities3====
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| − | Investigate Off-Site Considerations:
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| − | #Banking within watershed with goal of:
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| − | *Linear: 0.55 inches over impervious
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| − | *Nonlinear: 1.1 inches over impervious
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| − | #Cash as determined by LGU
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| − | Provide site survey, maps, regulations, and/or cost estimates documenting infeasibility and cost-prohibitive nature of meeting the original Treatment Goal or FTO Alternatives
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| − | <font size=5>END</font size>
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| − | | |
| − | ====Utilities4====
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| − | *Select Flexible Treatment Option Alternative No. 1 or No. 2
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| − | *Revise Treatment Goal
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| − | *Provide site survey, maps, regulations, and/or cost estimates documenting infeasibility and cost-prohibitive nature of meeting the original Treatment Goal
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| − | | |
| − | [[Design sequence flow chart#Karst, shallow groundwater, shallow bedrock|next]]
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| − | | |
| − | ===Karst, shallow groundwater, shallow bedrock===
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