Presentation is loading. Please wait.

Presentation is loading. Please wait.

Design Steps for Construction types-and-programs/stormwater/construction- stormwater/stormwater-steps-to-construction.html.

Similar presentations


Presentation on theme: "Design Steps for Construction types-and-programs/stormwater/construction- stormwater/stormwater-steps-to-construction.html."— Presentation transcript:

1 Design Steps for Construction types-and-programs/stormwater/construction- stormwater/stormwater-steps-to-construction.html Adapted from the MPCA Website Dwayne Stenlund, CPESC #2052 MNDOT/OES

2 SWPPP Definition “Storm Water Pollution Prevention Plan (SWPPP)” means a plan for stormwater discharge that includes all required content under Part III of this Permit and which describes the erosion prevention BMPs, sediment control BMPs and Permanent Stormwater Management Systems that, when implemented, will decrease soil erosion on a parcel of land and decrease off‐site nonpoint pollution.

3 BMP Definition “Best Management Practices (BMPs)” means the most effective and practicable means of erosion prevention and sediment control, and water quality management practices that are the most effective and practicable means of to control, prevent, and minimize degradation of surface water, including avoidance of impacts, construction‐phasing, minimizing the length of time soil areas are exposed, prohibitions, pollution prevention through good housekeeping, and other management practices published by state or designated area‐wide planning agencies.

4 Infeasible Definition “Infeasible” means not technologically possible or not economically practicable and achievable in light of the best industry practices.

5 Treatment Volume Definition “Water Quality Volume” means one (1) inch of runoff from the new impervious surfaces created by this project (calculated as an instantaneous volume) and is the volume of water to be treated in the Permanent Stormwater Management System, as required by this permit.

6 Erosion Prevention “Erosion Prevention” means measures employed to prevent erosion. Examples include but not limited to: soil stabilization practices, limited grading, mulch, temporary erosion protection or permanent cover, and construction phasing.

7 Steep Slopes Definition “Steep Slopes” means slopes that are 1:3 (V:H) (33.3 percent) or steeper in grade.

8 Ditch Stabilization Definition The Permittee(s) must stabilize the normal wetted perimeter of any temporary or permanent drainage ditch or swale that drains water from any portion of the construction site, or diverts water around the site, within 200 lineal feet from the property edge, or from the point of discharge into any surface water. Stabilization of the last 200 lineal feet must be completed within 24 hours after connecting to a surface water or property edge. Designing for (Applying) mulch, hydromulch, tackifier, polyacrylamide or similar erosion prevention practices is not acceptable stabilization in any part of a temporary or permanent drainage ditch or swale. “Normal Wetted Perimeter” means the area of a conveyance, such as a ditch, channel, or pipe that is in contact with water during flow events that are expected to occur from a two‐year 24‐hour storm event.

9 Buffer Definition “Natural Buffer” means an area of undisturbed cover surrounding surface waters within which construction activities are restricted. Natural buffer includes the vegetation, exposed rock, or barren ground that exists prior to commencement of earth‐disturbing activities.

10 Steps to Construction Step 1. Identify the site Step 2. Permits needed Step 3. Environmental review Step 4. Permit requirements Step 5. Special waters Step 6. Protected waters Step 7. SWPPP Step 8. Discharges Step 9. Eligibility Step 10. Application form Step 11. Application deadlines Step 12. Construction

11 Step 1. Identify the construction site boundaries, the latitude and longitude for the centroid of the site, and the major phases of the project. – Proposed construction site boundaries (lat/long, GPS) – Identify phasing opportunities for vegetation retention, vegetation establishment sequence – Minimize or eliminate negative impacts by time of year, speed

12 Step 2. Determine if additional permits are needed – USACE – DNR – Tribal – Watershed district – City/county – Other Water appropriations

13 Step 3. Determine if Environmental Review is needed – MN. Rules Chapter 4410 – Understand and design to deliver the commitments made Eagles, fish, cultural/historic, rare, endangered, threatened plants/animals Viewsheds Air quality Etc.

14 Step 4. Understand the requirements of the NPDES/SDS general stormwater permit for construction activity. – Common plan of development – Chain of responsibility – Prevention of topsoil compaction – Soil type, Soil preservation – Location and type of all temporary and permanent EP/SC, plus amendment process 10/5 acres drainage to a single point requires a temporary sediment basin – Encourages a temporary sediment basin downstream of steep (>3:1) and highly erodible soils Permanent water treatment: 1 inch water quality volume retained on site per acre of cumulative impervious surface area – Exempt/Not feasible, – Exempt/Proximity, – Exempt/Right of Way, – Infiltration/Filtration, – Regional Ponding or – Wet Sedimentation – Estimated preliminary quantities tabulated for the life of the project – Acres of pre and post impervious surfaces – Drainage flows, ultimate receiving waters – Areas not to be disturbed (wetlands, buffers, special items) – Phased construction – Post-con maintenance plan

15 Step 5. Identify waters that have the potential to receive a discharge of stormwater runoff or discharge from a permanent stormwater management system (I mile) Special waters – – Impaired waters – – programs/minnesotas-impaired-waters-and-tmdls/minnesotas-impaired- waters-and-total-maximum-daily-loads-tmdls.html programs/minnesotas-impaired-waters-and-tmdls/minnesotas-impaired- waters-and-total-maximum-daily-loads-tmdls.html Approved TMDL Implementation plan – programs/minnesotas-impaired-waters-and-tmdls/tmdl-projects/tmdl- projects-and-staff-contacts.html programs/minnesotas-impaired-waters-and-tmdls/tmdl-projects/tmdl- projects-and-staff-contacts.html Other waters – – DNR Public Water Search

16 Step 6. Determine if discharges from construction site will impact other protected resources The following list identifies protected resources in Minnesota. – Listed endangered or threatened species or a designated critical habitat. Contact the U.S. Fish and Wildlife Service, Ecological Services, Midwest.U.S. Fish and Wildlife Service, Ecological Services, Midwest – Minnesota listed endangered, threatened and special concern species. To obtain a list of these species in the site that you are going to be disturbing, submit a NHIS Data Request form with the Minnesota Department of Natural Resources Division of Ecological Resources.NHIS Data RequestMinnesota Department of Natural Resources Division of Ecological Resources – Properties listed or eligible for listing in the National Register of Historic Places or known or discovered archeological sites. Contact Minnesota Historical Society National Register Properties Minnesota Historical Society National Register Properties – MPCA Calcareous fens. If runoff from the site discharges to a calcareous fen as listed in Minn. R , subp. 6.b., additional permit requirements apply. Use the Special Waters Search and quad map to identify your construction site and prepare a list of all the calcareous fens that have the potential to be impacted by discharges from the site. – Special Waters Search: This is an electronic map tool using Geographic Information Systems (GIS) technology. Use this tool to identify your construction site and prepare a list of all the calcareous fens that have the potential to be impacted by discharges from the site. DNR Calcareous Fens. The Minnesota Department of Natural Resources (DNR) works closely with counties and citizens to identify sensitive and rare habitat resources. Calcareous fens identified through these efforts are compiled on the DNR List of Known Calcareous Fen Sites. The DNR Calcareous Fens are fens that appear on this list but are not yet listed by the MPCA as Outstanding Resource Value Waters. Construction that results in a discharge to this category of fen is covered under the general NPDES/SDS Construction Stormwater Permit, but must also meet the Wetland Conservation Act and wetland protection rules administered by the DNR. – Special Waters Search This is an electronic map tool using Geographic Information Systems (GIS) technology. Use this tool to identify your construction site and prepare a list of all the calcareous fens that have the potential to be impacted by discharges from the site. Calcareous fens are identified on the Special Waters Search by the section in which the fen is located. Note: This is best viewed using Internet Explorer 5.0 or higher or Netscape 6.0 or higher, with pop-up blockers disabled and screen resolution set to 1024x768 or higher. – Contact the appropriate DNR Regional Hydrologists: Northwest Region (Becker, Beltrami, Cass, Clay, Clearwater, Douglas, Grant, Hubbard, Kittson, Lake of the Woods, Mahnomen, Marshall, Norman, Otter Tail, Pennington, Polk, Pope, Red Lake, Roseau, Stevens, Traverse, Todd, Wadena and Wilkin counties) Larry Kramka Northeast Region (Aitkin, Carlton, Cook, Crow Wing, Itasca, Koochiching, Lake, Pine and St. Louis counties) Dan Retka Central Region (Anoka, Benton, Carver, Chisago, Dakota, Hennepin, Isanti, Kanabec, Mille Lacs, Morrison, Ramsey, Scott, Sherburne, Stearns, Washington and Wright counties) Dale Homuth Southern Region (Big Stone, Blue Earth, Brown, Chippewa, Cottonwood, Dodge, Faribault, Fillmore, Freeborn, Goodhue, Houston, Jackson, Kandiyohi, Lac Qui Parle, Le Sueur, Lincoln, Lyon, Martin, McLeod, Meeker, Mower, Murray, Nicollet, Nobles, Olmsted, Pipestone, Redwood, Renville, Rice, Rock, Sibley, Steele, Swift, Wabasha, Waseca, Watonwan, Winona and Yellow Medicine counties) Dave Leuthe – DNR permits and the Wetland Conservation Act information DNR permits and the Wetland Conservation Act information Work affecting the course, current, or cross-section of a lake, wetland, river or stream may require a permit from one or all of these agencies. The DNR Public Waters Work Permit Program applies to those lakes, wetlands, rivers, and streams identified on DNR Public Water Inventory maps. The Wetland Conservation Act applies to nearly all wetlands not shown on the DNR Public Water Inventory maps. The Corps of Engineers regulatory authority generally covers all water and wetland areas, including those that are regulated by the DNR or subject to the Wetland Conservation Act.DNR Public Waters Work Permit ProgramDNR Public Water Inventory mapsWetland Conservation ActCorps of Engineers regulatory authority

17 Step 7. Prepare a Stormwater Pollution Prevention Plan (SWPPP). – Follow all requirements. – Document decisions – Keep design calculations – Use best engineering practices to the maximum extent practicable.

18 SWPPP Definition “Storm Water Pollution Prevention Plan (SWPPP)” means a plan for stormwater discharge that includes all required content under Part III of this Permit and which describes the erosion prevention BMPs, sediment control BMPs and Permanent Stormwater Management Systems that, when implemented, will decrease soil erosion on a parcel of land and decrease off‐site nonpoint pollution.

19

20 BMP Definition “Best Management Practices (BMPs)” means the most effective and practicable means of erosion prevention and sediment control, and water quality management practices that are the most effective and practicable means of to control, prevent, and minimize degradation of surface water, including avoidance of impacts, construction‐phasing, minimizing the length of time soil areas are exposed, prohibitions, pollution prevention through good housekeeping, and other management practices published by state or designated area‐wide planning agencies.

21 Steep Slopes Definition “Steep Slopes” means slopes that are 1:3 (V:H) (33.3 percent) or steeper in grade.

22 Buffer Definition “Natural Buffer” means an area of undisturbed cover surrounding surface waters within which construction activities are restricted. Natural buffer includes the vegetation, exposed rock, or barren ground that exists prior to commencement of earth‐disturbing activities.

23 Master SWPPP Owner SWPPP EA/EIS Commitments Decision matrix Design models, calculations/computations Site analysis for special, impaired waters Site analyses for hydraulic flows and routing (volume, rate, water quality) Site analysis for invasive aquatic organisms Contact (Project) SWPPP (Owner and Contractor) Provisions Plan – Narratives, details, plan quantities and locations Standard specifications

24 Water Quality Treatment Systems Wild-land Engineered wetlands Bioswales Ditch Rock riffles Filtration Buffers Riprap thermal coolers Urban Ponds w/ pretreatment forebays Swirl systems Vaults – Open – Tree/rock – Sand filter Filtration/ infiltration Rural Wet ponds Dry ponds w/ draintile Filtration/infiltration Bioswales Stepped pools Treatment pool berms Two stage ditches Soil media Riprap thermal coolers

25 Treatment Volume Definition “Water Quality Volume” means one (1) inch of runoff from the new impervious surfaces created by this project (calculated as an instantaneous volume) and is the volume of water to be treated in the Permanent Stormwater Management System, as required by this permit.

26 Infeasible Definition “Infeasible” means not technologically possible or not economically practicable and achievable in light of the best industry practices.

27 Step 8. Identify discharges [locations]. – Check waters list to determine which special waters, impaired waters and calcareous fens have a potential to receive a discharge after considering water flow and modifications to the construction plans made for the purpose of preventing water resource impacts. Discharges of concern for calcareous fens are direct discharges or an indirect discharge to the fen from the construction site within one mile. – Keep the list of waters that will receive discharges from the construction site. This information is required on the permit application form.

28 Step 9. Determine eligibility for the Construction Stormwater General Permit – If special waters will receive a discharge within one mile of the construction site (identified in Steps 5A and 8) and the requirements (located in Appendix A of the general permit) for these discharges will not be fulfilled. You will need an individual NPDES/SDS Construction Stormwater Permit.

29 Step 10. Complete online application form for an MPCA NPDES/SDS stormwater permit for construction activity – Owner/Permittee Information – Routine Contact for Owner/Permittee Information – Contractor/Permittee Information – Routine Contact for Contractor/Permittee Information – Third Party/Permittee Information – Project Type – Project Location – Project Name and Location – Project Size – Permanent Stormwater Management – Water Bodies (within one mile of project) – Construction Dates – Payment Choose payment method Bank account routing number and account number for eCheck option Visa/MasterCard number, card holder name and expiration date for credit/debit option

30 Step 10b. Projects that require a paper application – For projects that will disturb 50 acres or more and have a discharge point on the project that is within one mile of, and flows to, as special or impaired, or applicants that do not have internet access: – Call the MPCA at or or to obtain a Submittal Number. If the Submittal Number is not included with the paper permit application, the application will be considered

31 Step 11. Submit completed application form along with the $400 application fee to the MPCA. – Submittal deadlines: Projects requiring an individual NPDES/SDS Construction Stormwater Permit days before the construction start date. Projects disturbing 50 acres or more and have a discharge point on the project that is within one mile of, and flows to, a special water or an impaired water - 30 days before the construction start date submit application and SWPPP. All other projects - 7 days before the construction start date.

32 Step 12. Begin construction. – When is permit coverage granted and construction can begin? Projects disturbing 50 acres or more and have a discharge point on the project that is within one mile of, and flows to, a special water or an impaired water - 30 days after the postmarked date of the completed application unless notified in writing that the SWPPP does not meet the general permit requirements. Projects requiring an individual NPDES/SDS construction stormwater permit - After process including permit development, public input, and permit issuance has been completed. All other projects - 7 days after submitting the complete online application or 7 days after the postmarked date of the completed application form.


Download ppt "Design Steps for Construction types-and-programs/stormwater/construction- stormwater/stormwater-steps-to-construction.html."

Similar presentations


Ads by Google