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'''Timelines shown below are approximate.''' We update this page infrequently.
 
'''Timelines shown below are approximate.''' We update this page infrequently.
  
{{alert|We anticipate significant updates to this page in mid-June, 2018. Please re-visit this site then.|alert-info}}
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{{alert|Updated March 28, 2022|alert-info}}
  
{{alert|Updated June 2, 2017|alert-info}}
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==Iron Enhanced sand filters==
 +
[https://stormwater.pca.state.mn.us/index.php?title=Iron_enhanced_sand_filter_(Minnesota_Filter) Iron enhanced sand filters] (IESFs) incorporate iron into sand filter design for the purpose of removing dissolved phosphorus. Because dissolved phosphorus is much more bioavailable than particulate phosphorus and because few stormwater best management practices effectively remove dissolved phosphorus, IESFs are an important practice in locations where receiving waters are impacted by [https://stormwater.pca.state.mn.us/index.php?title=Phosphorus_in_stormwater phosphorus].
  
==Swales==
+
We executed a work order to collecting information for IESFs and will use that information to update guidance in the Manual on design, construction, and O&M of IESFs. In 2019 we developed a spreadsheet listing over 150 IESFs in Minnesota. The spreadsheet with this information [https://stormwater.pca.state.mn.us/index.php?title=File:IESF_Database_FINAL_20190630.xlsx can be found here]. We collected primarily location and general information about the IESFs.
Updates to the swale section of the Stormwater Manual. Click on this link to see the scope of work - [[file:Final scope of work.docx]]
 
  
==Construction stormwater (CSW)==
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This new work is intended to collect additional information pertaining to the performance of these practices. The tasks for this work order are summarized below.
A work order will be executed in July, 2017, to provide information on the following CSW best management practices.
+
*'''Task A: Determine data to be collected'''. Identify the parameters to be collected for Task B. Examples include but are not limited to information on iron content, organic matter content, infiltration rate, drying time, pretreatment method, groundwater flow, the ratio of watershed to treatment practice, whether the water application was uniform, appropriateness of the practice, amount of shade, and whether the practice is online or offline.
*Temporary Sediment Traps and Basins
+
*'''Task B: Solicit existing data'''. Collect quantitative and qualitative data on design, siting, construction, performance, and maintenance, using the parameters identified in Task A. The data will be incorporated into the recently completed Iron Enhanced Sand Filter Database (MPCA 2019b).  
*Stabilized Earth/Soil Berm, including wood chip berm
+
*'''Task C: Analyze Existing Data'''. Analyze the existing data to identify gaps and initial relationships between collected variables and performance. Analysis methods may include time series analysis, percent exceedance, linear and non-linear regressions, statistical comparisons (paired and unpaired, ANOVA, etc.), and other methods for quantitative/qualitative analyses, as applicable.  
*Buffer Zones
 
*Lined Channels
 
*Riprap
 
*Temporary stream crossing
 
*Dewatering, including
 
**Chemical Treatment
 
**Sediment Filtration
 
The information will be used to create new pages for these BMPs. For an example of what these pages will contain, [https://stormwater.pca.state.mn.us/index.php?title=Erosion_prevention_practices_-_temporary_seeding_and_stabilization link here]. We anticipate the work being completed in winter, 2018.
 
  
The work order includes development of guidance for winter sediment control and erosion prevention at construction sites.
+
Timeline: January 10, 2022 – December 31, 2022<br>
 +
Deliverables: Excel spreadsheet populated with info, an interim report summarizing the data analysis including assessment of site-specific parameters identified as risk factors for poor performance.
  
==Pretreatment==
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==Green Infrastructure==
A work order will be executed in July, 2017, to provide the following new information on pretreatment.
+
Over the past two years we have been building information on Green Infrastructure (GI) into the stormwater wiki. See the [https://stormwater.pca.state.mn.us/index.php?title=What%27s_New What's New] page in the wiki to see recent updates.
*Design criteria and design considerations, construction guidelines, and maintenance recommendations for pretreatment settling practices
 
*General information and design, construction, and maintenance guidance for level spreaders
 
*Recommendations on sizing criteria for different types of pretreatment practices
 
*5 to 7 case studies summarizing the use of pretreatment practices
 
We anticipate completing the work in winter, 2018.
 
  
==Stormwater Program for Municipal Separate Storm Sewer Systems (MS4)==
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We currently have a work order to update information on planning for GI. Using publically available resources, we will research and compile planning content for GI in the stormwater manual. This content could include, but is not limited to:
[https://stormwater.pca.state.mn.us/index.php?title=Stormwater_Program_for_Municipal_Separate_Storm_Sewer_Systems_%28MS4%29 This portal page] has been redesigned to improve the organization and add information on several new topics. New pages are being added to address each of the [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_Program_for_Municipal_Separate_Storm_Sewer_Systems_%28MS4%29#MS4_Permit_Minimum_Control_Measure_.28MCM.29_overview_and_guidance Minimum Control Measures]. [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_Program_for_Municipal_Separate_Storm_Sewer_Systems_%28MS4%29#Other_technical_assistance_and_guidance Another section] will provide technical guidance and assistance. We anticipate eventually adding case studies and photo galleries similar to the [https://stormwater.pca.state.mn.us/index.php?title=Construction_stormwater_photo_gallery construction stormwater photo galleries]. These pages will be constructed and updated throughout 2017.
+
*General description of planning as it relates to GI practices
 +
*Steps involved in the planning process
 +
*Regional considerations
 +
*Who should be involved in the planning process
 +
*Common and perceived roadblocks for GI implementation
 +
*How to incorporate GI into ordinances
 +
*How GI can complement stormwater systems
 +
*Explanation of the costs and benefits of planning
 +
*The role planning for GI can play in climate resiliency
 +
*Links to external planning guidance and resources
  
==Green infrastructure for stormwater management==
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Timeline: January 2022 – June 2022 or December 2022<br>
We have created a portal page containing links to pages addressing [https://stormwater.pca.state.mn.us/index.php?title=Green_Infrastructure_for_stormwater_management Green Infrastructure]. The pages including the following and will be developed through the summer of 2017.
+
Deliverables: A new Planning Page in the stormwater manual populated with planning content
*Overview of Green Infrastructure and Low Impact Development
 
*Stormwater management, Green Infrastructure, and Low Impact Development
 
*Multiple benefits of Green Infrastructure - includes information on biodiversity, sustainable communities, living (green) streets, climate adaptation
 
*Case studies for Green Infrastructure stormwater management
 
*Links and resources for Green Infrastructure
 
  
==Road salt==
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==Vegetation==
We continue updating [https://stormwater.pca.state.mn.us/index.php/Road_salt,_smart_salting_and_winter_maintenance information on road salt] as time allows.
+
We executed a work order to update information on vegetation into the stormwater wiki. The goals are summarized below.
 +
*Develop guidance and recommendations for assessing existing vegetation, including but not limited to the following.
 +
**Existing vegetation to preserve (heritage trees, threatened and endangered species, desired plants)
 +
**Wetland delineation
 +
**Historic plant community (or wetlands) to identify within project area or potentially replicate. Link to appropriate resources, such as Marshner’s Map and Historical Aerial resources such as Minnesota Historical Aerial Photos Online (MHAPO) and Mississippi River Commission Maps
 +
**Existing plant community classifications to identify within project or potentially replicate
 +
**Invasive species identification and removal, including invasive species removal strategies, considerations, and regulations
 +
**Mitigation considerations (e.g. tree replacement, wetland permits)
 +
*Develop guidance and recommendations for assessing existing soil health and function, including but not limited to the following.
 +
**Ability for soil to support vegetative growth, considering but not limited to
 +
***nutrient status
 +
***pH
 +
***bulk density and
 +
***microbial function in rhizosphere (fungi, algae, bacteria, protozoa).
 +
**Soil testing, considering but not limited to the following.
 +
***Conducting soil tests on indicators as they may relate to vegetation establishment and long term planting success, including water content, water holding capacity, infiltration rates, compaction, nutrient and organic matter content, soil composition/structure, bulk density, soluble salts, metals and minerals, pH, and soil biotic assessment.
 +
***Interpreting soil test results, including soil ecological function, ability to support vegetative growth, and ability to support hydraulic/hydrologic function.
 +
***Amending soils based on test results for plant establishment, including modifying soil pH, adding organic or inorganic amendments, and soil loosening or stabilization techniques.
 +
***Develop guidance and recommendations for selecting appropriate soil mixes for certain design conditions (e.g. low organic media, salt tolerance, high iron, etc.)
 +
***Develop guidance and recommendations for assessing individual vegetation impacts (e.g., N-fixers effect on nutrient status, deep rooters effect on hydrology, etc.)
 +
*Develop guidance and recommendations for creating a vegetation management plan for future maintenance for future maintenance, including but not limited to the following.
 +
**Establishment goals and objectives, including resilient designs
 +
**Site description, including management zones
 +
**Site preparation
 +
**Vegetation monitoring and adaptive management, including performance criteria
 +
**Documentation and reporting, including figures and maps
 +
 
 +
Timeline: March-December 2022<br>
 +
Deliverables: Memo(s) summarizing guidance on design considerations and recommendations, site assessment, and site preparation when incorporating vegetation at a development or redevelopment site, and for creating a site management plan.
 +
 
 +
==Bioretention media waste management==
 +
Executed a work order to provide information on characterization of soil and engineered media in stormwater treatment practices, including disposal recommendations.
 +
 
 +
Timeline: March-July, 2022<br>
 +
Deliverables: Documents and/or memos providing recommended updates to the Minnesota Stormwater Manual.
 +
 
 +
[[Category:Level 2 - General information, reference, tables, images, and archives/Reference]]

Latest revision as of 19:02, 3 December 2022

Timelines shown below are approximate. We update this page infrequently.

Information: Updated March 28, 2022

Iron Enhanced sand filters

Iron enhanced sand filters (IESFs) incorporate iron into sand filter design for the purpose of removing dissolved phosphorus. Because dissolved phosphorus is much more bioavailable than particulate phosphorus and because few stormwater best management practices effectively remove dissolved phosphorus, IESFs are an important practice in locations where receiving waters are impacted by phosphorus.

We executed a work order to collecting information for IESFs and will use that information to update guidance in the Manual on design, construction, and O&M of IESFs. In 2019 we developed a spreadsheet listing over 150 IESFs in Minnesota. The spreadsheet with this information can be found here. We collected primarily location and general information about the IESFs.

This new work is intended to collect additional information pertaining to the performance of these practices. The tasks for this work order are summarized below.

  • Task A: Determine data to be collected. Identify the parameters to be collected for Task B. Examples include but are not limited to information on iron content, organic matter content, infiltration rate, drying time, pretreatment method, groundwater flow, the ratio of watershed to treatment practice, whether the water application was uniform, appropriateness of the practice, amount of shade, and whether the practice is online or offline.
  • Task B: Solicit existing data. Collect quantitative and qualitative data on design, siting, construction, performance, and maintenance, using the parameters identified in Task A. The data will be incorporated into the recently completed Iron Enhanced Sand Filter Database (MPCA 2019b).
  • Task C: Analyze Existing Data. Analyze the existing data to identify gaps and initial relationships between collected variables and performance. Analysis methods may include time series analysis, percent exceedance, linear and non-linear regressions, statistical comparisons (paired and unpaired, ANOVA, etc.), and other methods for quantitative/qualitative analyses, as applicable.

Timeline: January 10, 2022 – December 31, 2022
Deliverables: Excel spreadsheet populated with info, an interim report summarizing the data analysis including assessment of site-specific parameters identified as risk factors for poor performance.

Green Infrastructure

Over the past two years we have been building information on Green Infrastructure (GI) into the stormwater wiki. See the What's New page in the wiki to see recent updates.

We currently have a work order to update information on planning for GI. Using publically available resources, we will research and compile planning content for GI in the stormwater manual. This content could include, but is not limited to:

  • General description of planning as it relates to GI practices
  • Steps involved in the planning process
  • Regional considerations
  • Who should be involved in the planning process
  • Common and perceived roadblocks for GI implementation
  • How to incorporate GI into ordinances
  • How GI can complement stormwater systems
  • Explanation of the costs and benefits of planning
  • The role planning for GI can play in climate resiliency
  • Links to external planning guidance and resources

Timeline: January 2022 – June 2022 or December 2022
Deliverables: A new Planning Page in the stormwater manual populated with planning content

Vegetation

We executed a work order to update information on vegetation into the stormwater wiki. The goals are summarized below.

  • Develop guidance and recommendations for assessing existing vegetation, including but not limited to the following.
    • Existing vegetation to preserve (heritage trees, threatened and endangered species, desired plants)
    • Wetland delineation
    • Historic plant community (or wetlands) to identify within project area or potentially replicate. Link to appropriate resources, such as Marshner’s Map and Historical Aerial resources such as Minnesota Historical Aerial Photos Online (MHAPO) and Mississippi River Commission Maps
    • Existing plant community classifications to identify within project or potentially replicate
    • Invasive species identification and removal, including invasive species removal strategies, considerations, and regulations
    • Mitigation considerations (e.g. tree replacement, wetland permits)
  • Develop guidance and recommendations for assessing existing soil health and function, including but not limited to the following.
    • Ability for soil to support vegetative growth, considering but not limited to
      • nutrient status
      • pH
      • bulk density and
      • microbial function in rhizosphere (fungi, algae, bacteria, protozoa).
    • Soil testing, considering but not limited to the following.
      • Conducting soil tests on indicators as they may relate to vegetation establishment and long term planting success, including water content, water holding capacity, infiltration rates, compaction, nutrient and organic matter content, soil composition/structure, bulk density, soluble salts, metals and minerals, pH, and soil biotic assessment.
      • Interpreting soil test results, including soil ecological function, ability to support vegetative growth, and ability to support hydraulic/hydrologic function.
      • Amending soils based on test results for plant establishment, including modifying soil pH, adding organic or inorganic amendments, and soil loosening or stabilization techniques.
      • Develop guidance and recommendations for selecting appropriate soil mixes for certain design conditions (e.g. low organic media, salt tolerance, high iron, etc.)
      • Develop guidance and recommendations for assessing individual vegetation impacts (e.g., N-fixers effect on nutrient status, deep rooters effect on hydrology, etc.)
  • Develop guidance and recommendations for creating a vegetation management plan for future maintenance for future maintenance, including but not limited to the following.
    • Establishment goals and objectives, including resilient designs
    • Site description, including management zones
    • Site preparation
    • Vegetation monitoring and adaptive management, including performance criteria
    • Documentation and reporting, including figures and maps

Timeline: March-December 2022
Deliverables: Memo(s) summarizing guidance on design considerations and recommendations, site assessment, and site preparation when incorporating vegetation at a development or redevelopment site, and for creating a site management plan.

Bioretention media waste management

Executed a work order to provide information on characterization of soil and engineered media in stormwater treatment practices, including disposal recommendations.

Timeline: March-July, 2022
Deliverables: Documents and/or memos providing recommended updates to the Minnesota Stormwater Manual.

This page was last edited on 3 December 2022, at 19:02.