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==Requirements== | ==Requirements== | ||
{{alert|The following are requirements of the [http://www.pca.state.mn.us/index.php/water/water-types-and-programs/stormwater/construction-stormwater/index.html Minnesota Construction Stormwater General Permit]|alert-danger}} | {{alert|The following are requirements of the [http://www.pca.state.mn.us/index.php/water/water-types-and-programs/stormwater/construction-stormwater/index.html Minnesota Construction Stormwater General Permit]|alert-danger}} | ||
− | *3 foot separation from the bottom of the bioretention system to seasonal high water table | + | *3 foot separation from the bottom of the bioretention system to the seasonal high water table |
− | *Use most restrictive infiltration rate within 3 feet of the bottom of the BMP | + | *Use the most restrictive infiltration rate within 3 feet of the bottom of the BMP |
− | *Drawdown time of 24 hours | + | *Drawdown time of 24 hours when the discharge is to trout streams |
*For measured infiltration rates, apply a safety factor of 2 | *For measured infiltration rates, apply a safety factor of 2 | ||
*Pretreatment | *Pretreatment |
Below is a summary of requirements, recommendations and other information for using the Minimal Impacts Design Standards (MIDS) calculator for bioretention BMPs. Links to MIDS pages and the MIDS calculator are included at the bottom of this page.