...a descriptions of different types of infiltration practices to which these design guidelines apply, [https://stormwater.pca.state.mn.us/index.php?title=BMPs_
...ortant tool for retention and detention of stormwater runoff. Depending on design and construction, infiltration practices may provide additional benefits, i
The following terminology is used throughout this design section:
{{Alert|''REQUIRED'' - Indicates design standards stipulated by the [http://stormwater.pca.state.mn.us/index.php/Co
...e/subbases thickness for supporting traffic is determined using structural design methods. The thicker of the two resulting designs is employed.
==Design phase maintenance considerations==
...The main goals of this article are therefore to provide a detailed list of design considerations and examples of issues to consider when designing a green ro
...this page, we recommend the following references, which address green roof design.
...s are used in the text to distinguish various levels of stormwater wetland design guidance:
{{alert|'''Required''':Indicates design standards stipulated by the MPCA Permit (or other consistently applicable r
...ortant tool for retention and detention of stormwater runoff. Depending on design and construction, swales may provide additional benefits, including cleaner
==Design phase maintenance considerations==
This page provides a discussion of design elements and design steps for high-gradient stormwater step-pool swale (step pools). The follow
...ortant tool for retention and detention of stormwater runoff. Depending on design and construction, swales may provide additional benefits, including cleaner
...ded application, and water quality recommendations and/or regulations. The design process for each project must be flexible and rigorous enough to address th
...implementation. In practice the distinction between phases is not strict. Design is an iterative process which should include several rounds of review begin
<font size=3>'''MIDS Calculator stormwater pond design level criteria related to pond volume'''</font size><br>
Link to this [[MIDS Calculator stormwater pond design level criteria related to pond volume|table]]
This page provides a discussion of design elements and design steps for dry swales, which are often called grass swales. The following di
...ortant tool for retention and detention of stormwater runoff. Depending on design and construction, swales may provide additional benefits, including cleaner
...the local community. The unified approach addresses five different sizing criteria, as shown below.
...his section on Unified sizing criteria may be viewed as a [[Unified sizing criteria combined|single article]].'''
<font size=3>'''MIDS Calculator stormwater pond design level criteria related to pond volume'''</font size><br>
Link to this [[MIDS Calculator stormwater pond design level criteria related to pond volume|table]]
...TING GREEN ROOF FACT SHEET.docx]] - technical document provided by Kestrel Design Group to MPCA (may be modified from original version by MPCA)
*[[File:green roof benefits.docx]] - technical document provided by Kestrel Design Group to MPCA (may be modified from original version by MPCA)
...underdrain. Recharge criteria, if applicable, can be met by modifying the design to include an infiltration gallery below the underdrain, so long as it is a
...odified to incorporate an infiltration gallery that can help meet recharge criteria, if properly sized.</td>
<td>Evaluation of MPCA stormwater pond designcriteria</td>
<td>Evaluation of pond sizing criteria against MPCA stormwater pond design standards to produce a relative evaluation of pond performance</td>
<font size=3>'''Summary of stormwater design recommendations to enhance phosphorus removal.</font size>'''<br>
Link to this [[Stormwater Design Recommendations to Enhance Phosphorus Removal|table]]
<font size=3>'''Overview of unified stormwater sizing criteria'''</font size><br>
Link to this [[Overview of unified stormwater sizing criteria|table]]
...ention task 2 - definitions.docx]]: technical document provided by Kestrel Design Group to MPCA (may be modified from original version by MPCA)
...k 4 soil infiltration rates.docx]]: technical document provided by Kestrel Design Group to MPCA (may be modified from original version by MPCA)
...only if high flows are not <span title="Stormwater runoff in excess of the design flow, which is diverted around a stormwater structure"> '''bypassed'''</spa
...flow path to overall length is 0.3 for Level 1 Design and 0.8 for Level 2 Design
...le as a result of recharge at the surface, can be a limiting factor in the design and performance of infiltration practices. A groundwater mounding analysis
...gory:Level 3 - Best management practices/Specifications and details/Designcriteria]]
...ormwatermanagementprogram/pages/stormwater_design.aspx Maryland Stormwater Design Manual]
...energy-mineral-and-land-resources/stormwater/stormwater-program/stormwater-design North Carolina Department of Environment and Natural Resources - Stormwater
...x]] - document produced by Barr Engineering as part of the Minimal Impacts Design Standards project
*[[Designcriteria for iron enhanced sand filter]]
<span title="Stormwater wetlands are similar in design to stormwater ponds and mainly differ by their variety of water depths and
...designcriteria for shallow wetland, ED shallow wetland, and pond/wetland design are presented below:
...ass the system through a stabilized discharge point. The Permittee(s) must design the infiltration system to provide a means to visually verify that the syst
...gory:Level 3 - Best management practices/Specifications and details/Designcriteria]]
<td>Is soil P content tested to be < 30 mg/kg per Mehlich III (or [[Designcriteria for bioretention#Notes about soil phosphorus testing: applicability and int
<td>Is soil P content tested to be < 30 mg/kg per Mehlich III (or [[Designcriteria for bioretention#Notes about soil phosphorus testing: applicability and int
...ed details for filtration systems can be accessed at this [[Computer-aided design and drafting (CAD/CADD) drawings|link]]. The drawings provide details and s
*[[Designcriteria for filtration]]
...details for pond and wetland systems are contained in the [[Computer-aided design and drafting (CAD/CADD) drawings]] section. The following details, with spe
*[[Designcriteria for stormwater wetlands]]
...the basin per [[Designcriteria for infiltration|Infiltration Basin DesignCriteria]].</td>
...on rate of soils, and required drawdown time per Infiltration Basin DesignCriteria. Maximum of 3 feet allowed.</td>
.... See [https://www.dot.state.mn.us/manuals/ MNDOT Manual Section 3248] for design guidance on PVC pipes. It is recommended to install one well per 50 feet of
....pdf at this link]. This detail includes construction sequencing and other design information.
...rage volume. Recharge credits provide real incentives to apply better site design techniques at development sites that can reduce the size and cost of stormw
...structural BMP (e.g., infiltration, bioretention, and filter), better site design techniques, or a combination of both.
...th the MIDS calculator will be incorrect if BMPs do not meet the following criteria|alert-warning}}
...rly designed, constructed and maintained. Guidance and recommendations for design, construction and maintenance are contained within the individual BMP secti
...elated planned development. Communities may wish to develop special sizing criteria for smaller redevelopment so that the cost to comply with stormwater requir
...lity in how redevelopment projects can comply with basic stormwater sizing criteria. This is done by proposing stormwater management guidance that a redevelopm
...erent components of a green roof. Thicknesses of some layers vary with the design (e.g. extensive vs. intensive roofs).</font size>]]
..., how much weight the roof can hold, is a major factor in determining roof design and construction. Green roofs are therefore typically defined as being eith
...on, 1996. [https://owl.cwp.org/mdocs-posts/design-of-sw-filtering-systems/ Design of Stormwater Filtering Systems].
*Haan, C.T., B.J. Barfield and J.C. Hayes, 1994. ''Design Hydrology and Sedimentology for Small Catchments''.
...r quantity control process. Bioretention employs a simple, site-integrated design that provides opportunity for runoff infiltration, filtration, storage, and
...Bioretention, when designed with an under-drain and liner, is also a good design option for treating [[Potential stormwater hotspots|stormwater hotspots]] (
...lution.files.wordpress.com/2011/12/ulm-elc_coldclimates.pdf Stormwater BMP Design Supplement for Cold Climates]. Center for Watershed Protection. Ellicott Ci
...ca.state.mn.us/index.php?title=Minnesota_plant_lists Plants for Stormwater Design]. Minnesota Pollution Control Agency. St. Paul, MN.
...bioretention terminology|terminology]], [[Designcriteria for bioretention|design]], [[Construction specifications for bioretention|construction]], [[operati
==Kestrel Design Group and contract team==
...?title=Stormwater_ponds '''wet pond''']</span> or storm sewer system. This design provides some runoff flow attenuation, filtering, but no volume reduction.
...ach system are illustrated in the [[Designcriteria for permeable pavement|design section]] for permeable pavement.
==Extreme flood control criteria (V<sub>p100</sub>)==
The goal of extreme flood criteria is to maintain the boundaries of the pre-development 100-year floodplain, r
...ns_-_filter_media Bioretention filter media]. This section on the [[Designcriteria for bioretention]] page provides a discussion on phosphorus management with
...=18984 Construction General Permit]. The current MPCA water quality volume criteria is referred to as the “hybrid rule” because it encompasses different ru
'''[[Unified sizing criteria#Computing water quality volume|Rule 1]]'''
...ortant tool for retention and detention of stormwater runoff. Depending on design and construction, swales may provide additional benefits, including cleaner
...nd have limited treatment capability. Incorporation of check dams into the design allows treatment of a portion or all of the [https://stormwater.pca.state.m
...e media phosphorus content 30 mg/kg or less per the Mehlich 3 (or [[Designcriteria for bioretention#Notes about soil phosphorus testing: applicability and int
...e media phosphorus content 30 mg/kg or less per the Mehlich 3 (or [[Designcriteria for bioretention#Notes about soil phosphorus testing: applicability and int
Stormwater wetlands are similar in design to [[stormwater ponds]] and mainly differ by their variety of water depths
*[[Designcriteria for stormwater wetlands]]
...nveyance system further downstream. Check dams incorporated into the swale design allow water to pool up and infiltrate into the underlying soil or engineere
*[[Designcriteria for dry swale (grass swale)]]
...sizing criteria|<font size=3>Schematic illustrating five different sizing criteria,</font size>]]
...the local community. The unified approach addresses five different sizing criteria, as shown below.
...he P content must be less than 30 mg/kg (ppm) per Mehlich III (or [[Designcriteria for bioretention#Notes about soil phosphorus testing: applicability and int
...rain the P content must be less than 30 mg/kg per Mehlich III (or [[Designcriteria for bioretention#Notes about soil phosphorus testing: applicability and int
...discussion focuses on wet extended detention ponds; however, all four main design variants are presented here for the sake of completeness.
==Flow-through pond (no extended detention) design==
==Designcriteria==
...fing Systems, available at http://www.spri.org, gives guidelines on how to design to minimize wind damage in green roofs, including, for example, how to eval
*Permittees must design basins using an impermeable liner if located within active karst terrain.
...and 2, clay liners are generally not recommended. Links to information on design and installation is recommended. For additional information see [[Liners fo
...mporarily store stormwater before allowing it to infiltrate into the soil. Design variants include; the infiltration basin, the infiltration trench, the dry
*[[Designcriteria for Infiltration basin]]
...mporarily store stormwater before allowing it to infiltrate into the soil. Design variants include; the infiltration basin, the infiltration trench, the dry
*[[Designcriteria for Infiltration trench]]
[[File:mids logo.jpg|300px|right|alt=image of Minimal Impact Design Standards logo]]
...apolis, Minnesota. Image by Bergerson Photography, Courtesy of The Kestrel Design Group, Inc., INSPEC, and Leo A Daly.</font size>]]
==Design phase maintenance considerations==
...icit in the design guidance in the previous sections is the fact that many design elements of filtering systems can minimize the maintenance burden and maint
[[File:mids logo.jpg|300px|left|alt=image of Minimal Impact Design Standards logo]]
*[[Designcriteria for stormwater and rainwater harvest and use/reuse]]
...yfish, links to supporting information, and links to information on system design, inspection, operation, and maintenance.
...=Contech_Jellyfish_Filter#Configurations appropriate configurations in the Design Manual] and [https://stormwater.pca.state.mn.us/index.php?title=Contech_Jel
...l.cwp.org/mdocs-posts/caracod-_sw_bmp_design_cold_climates/ Stormwater BMP Design Supplement for Cold Climates]. Center for Watershed Protection, Ellicott Ci
*[[Designcriteria for stormwater ponds]]
[[File:mids logo.jpg|300px|right|alt=image of Minimal Impact Design Standards logo]]
...//www.pca.state.mn.us/water/plants-stormwater-design Plants for stormwater design] by Shaw and Schmidt (2003).
...te using appropriate methods described below. The other method uses the [[Design infiltration rates|typical infiltration rate]] of the most restrictive unde
...mended number of soil boring, pits, and permeameter tests for bioretention design}}
...ridge, links to supporting information, and links to information on system design, inspection, operation, and maintenance.
...ater.org/pdf/bayfilter-design-manual.pdf appropriate configurations in the Design Manual] and [https://stormwater.pca.state.mn.us/index.php?title=BaySaver_Ba
...porated into local regulations and ordinances. Significant advances in BMP design, construction, maintenance, and performance require using recent informatio
...gallery below illustrates this process for the manual page called [[Designcriteria for bioretention]].
===Design considerations for ponds used for harvest and use===</noinclude>
...ign.png|300px|thumb|alt=schematic of pond design|<font size=3>Example pond design for a harvest and use/reuse system.</font size>]]
...ortant tool for retention and detention of stormwater runoff. Depending on design and construction, swales may provide additional benefits, including cleaner
...clude rock, earth, wood, and concrete. "> '''check dams'''</span> into the design allows treatment of a portion or all of the <span title="The volume of wate
...ortant tool for retention and detention of stormwater runoff. Depending on design and construction, swales may provide additional benefits, including cleaner
...feature surface/subsurface runoff storage seams and an energy dissipation design that is aimed at attenuating the flow to a desired level through energy and
...ltrate. See [[Computer-aided design and drafting (CAD/CADD) drawings]] for design drawing.
Because of the widespread use of this practice, we have separate pages on design, operation and maintenance, and crediting.
These four practices are grouped together because design, construction, operation, and maintenance guidelines and specifications are
*[[Designcriteria for infiltration]]
...d evenly throughout a portion of the filtration media. Surface sand filter design and operating parameters also applicable to iron-enhanced sand filter basin
*use of perforated pipes (or other appropriate drain pipe design) in a gravel bed to drain the filter.