Timelines shown below are approximate. We update this page infrequently.
The work includes the following.
1. Develop and enhance guidance and resources for permittees to evaluate TMDL-related permit compliance. This would include developing guidance for more robust modeling tools and general monitoring guidance that permittees could use to assess:
2. Develop outreach, training, and/or workshops to accompany these resources.
To view the workplan - File:Wiki work plan TMDLs.docx
See workplan - File:Wiki pretreatment workplan.docx
We are also executing a new work order to provide recommendations to the MPCA on sizing criteria for different types of pretreatment practices (e.g. forebay, filter strip, proprietary devices). These recommendations can be based on information in the literature, monitoring data, and/or from correspondence with stormwater practitioners. Work order ends June 30, 2019.
Update existing information and provide new information on active construction site erosion prevention and sediment control, including general and technical information on BMPs. Potential BMPs include the following.
See workplan - File:Wiki Construction SW workplan.docx
See workplan - File:Wiki swale case studies workplan.docx
Develop and disseminate information on case studies of water quality projects for Municipal Separate Storm Sewer System (MS4) permittees. The case studies cover a range of MS4 permit issues and types of MS4s (cities, townships, colleges, watershed districts/watershed management organizations).
See workplan - File:Wiki case study work plan.docx
Studies show that constructed stormwater ponds can export phosphorus. We will execute a work order to compile existing information on phosphorus dynamics in ponds, conditions that result in phosphorus export, and recommended design, construction, and maintenance practices. NOTE this is an area where further research is needed, and the information obtained through this work order is likely to be limited by knowledge gaps on this topic.
See workplan - File:Wiki phosphorus export work plan.docx
See workplan - File:Wiki pond assessment workplan.docx
See workplan - File:Wiki Blue Star workplan.docx
Develop a framework and communication-outreach plan for a method to credit street sweeping that can be implemented by Municipal Separate Storm Sewer (MS4) permittees to help meet permit requirements.
See workplan - File:Street sweeping work plan for wiki.docx
This work will be expanded in 2019 to include final development of the credit system and subsequent outreach and communication.
Develop materials, for incorporation into the Minnesota Stormwater Manual, on the topic of phosphorus retention by bioretention media and media components. The materials include documentation of local sources, simple tests or metrics, and/or design specifications that can be used by practitioners to reliably and repeatably obtain a biofiltration practice that removes and does not leach phosphorus and functions as expected.
This work will be completed in two phases and coordinated with research being conducted by the University of Minnesota. Phase 1 focuses on identifying materials that potentially may be used in biofiltration practices. The work plan for Phase 1 is below.
Phase 2 focuses on providing detailed information for each of the materials identified in Phase 1. We anticipate Phase 2 beginning in early summer.
We are pursuing opportunities to address the following topics, with the goal of developing guidance for the stormwater manual.
We have created a portal page containing links to pages addressing Green Infrastructure. We continue to work on pages associated with this topic.
We continue updating information on road salt as time allows.