We will be populating this site with information on future updates to the Manual. We anticipate having this page up-to-date by mid-August. Timelines shown below are approximate.
Updates to the bioretention section
(August-October, 2013). Updates include the following:
- definitions, examples and graphics that differentiate filtration, bioretention and infiltration BMPs and different types of filtration, bioretention and infiltration BMPs;
- guidance and recommendations for determining soil infiltration rates within infiltration and bioretention BMPs;
- refinement of existing stormwater pretreatment requirements or guidelines for each bioretention and infiltration BMP type;
- guidance and recommendations on the use of soil ripping to increase infiltration capacity of infiltration and bioretention BMPs;
- guidance and recommendations on the use of soil amendments to improve the infiltration and pollutant removal function of infiltration and bioretention BMPs;
- updated design specifications for bioretention and infiltration BMPs;
- new information on construction methods, construction techniques, and maintenance of infiltration and bioretention BMPs; and
- information on credits for water volume, phosphorus, and total suspended solids.
Creation of a section on trees (urban forestry)
(October-December, 2013). The section will likely include multiple pages similar to other BMP sections and will include the following information:
- an overview, inclduing graphics, on the use of urban forestry and trees for stormwater management in urban land use settings;
- a list of tree species appropriate for Minnesota;
- design specifications for tree quality, soil characteristics (quality and volume) for tree BMPs, and tree planting;
- construction design specifications for tree stormwater BMPs;
- guidelines for construction activities adjacent to existing trees;
- maintenance guidelines for trees;
- monitoring guidelines for tree BMPs;
- guidelines for street sweeping to remove tree debris;
- a fact sheet summarizing the applicability of urban forestry to stormwater management and use of trees as urban stormwater BMP;
- 5 to 10 case studies of existing urban forestry efforts and programs; and
- information on credits for water volume, phosphorus, and total suspended solids, including credits associated with evapotranspiration and canopy interception.