Miminal Impact Design Standards (MIDS) Calculator-New Version is Now Available

Minnesota Pollution Control Agency sent this bulletin at 07/22/2014 09:38 AM CDT

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 A new version of the MIDS Calculator is now available in the Minnesota Stormwater Manual.  Changes over the last 6 months include:

  • Tree trench/box credits for canopy interception and evapotranspiration
  • Bioretention with underdrain updated to apply the equation for phosphorus credit reduction based on media depth.
  • Summary table of total phosphorus and total suspended solids percent removal by BMP on the summary tab of the calculator
  • Annual runoff volumes to BMP summary tab was added
  • Bioretention media phosphurus credits to tree box/infiltration trench with underdrain
  • Bioretention medial phosphorus credits to swale with underdrain was added
  • Sizing inputs for stormwater ponds
  • Swale annual TSS, dissolved phosphorus and particulate phosphorus removals were adjusted
  • A stormwater reuse function!

A few other minor updates were also made.  You can now download this new version of the calculator.  Remember to delete your current version before downloading the new version.  Here's the link to download the calculator: http://stormwater.pca.state.mn.us/index.php/Calculator

Please let me know if you have questions or comments

Anne Gelbmann
Green Infrastructure Coordinator
MPCA/Municipal Stormwater Section 
anne.gelbmann@state.mn.us