Calculating stormwater volume and pollutant reductions and credits
The Minnesota Pollution Control Agency is currently working with a Contractor to develop information for volume and pollutant credits for most of the BMPs discussed in this manual. We anticipate this information will incorporated into the Manual by mid-winter, 2015. Draft versions of this information can be found for the following BMPs.
- Calculating credits for bioretention
- Calculating credits for permeable pavement
- Calculating credits for tree trenches and tree boxes
- Calculating credits for green roofs
Information on using the Minimal Impact Design Standards calculator to calculate credits for volume, phosphorus and total suspended solids.
- Requirements, recommendations and information for using bioretention with no underdrain BMPs in the MIDS calculator
- Requirements, recommendations and information for using bioretention with an underdrain BMPs in the MIDS calculator
- Requirements, recommendations and information for using swale without an underdrain as a BMP in the MIDS calculator
- Requirements, recommendations and information for using swale with an underdrain as a BMP in the MIDS calculator
- Requirements, recommendations and information for using swale side slope as a BMP in the MIDS calculator
- Requirements, recommendations and information for using wet swale as a BMP in the MIDS calculator
- Requirements, recommendations and information for using sand filter as a BMP in the MIDS calculator
- Requirements, recommendations and information for using trees as a BMP in the MIDS calculator
- Requirements, recommendations and information for using trees with an underdrain as a BMP in the MIDS calculator
- Requirements, recommendations and information for using green roofs as a BMP in the MIDS calculator
- Requirements, recommendations and information for using permeable pavement BMPs in the MIDS calculator
- Requirements, recommendations and information for using stormwater pond as a BMP in the MIDS calculator
- Requirements, recommendations and information for using stormwater wetland as a BMP in the MIDS calculator.
- Requirements, recommendations and information for using Other as a BMP in the MIDS calculator
- Requirements, recommendations and information for using infiltration basin/underground infiltration BMPs in the MIDS calculator
- Requirements, recommendations and information for using Harvest and re-use/cistern as a BMP in the MIDS calculator
The Manual also contains information on models that can be used to calculate credits for volume and pollutants. Information on models is found on the following pages.
- Available stormwater models and selecting a model
- The Simple Method for estimating phosphorus export
The original Manual contained credit information for Better Site Design.