RFRMRCH1_ROSEAU_SWPPP_MN_APR2014_wEXHIBITS.pdf

Project Name: Roseau Reach 1 Stormwater Pollution Prevention Plan Contract Number: RFRMRCH1_ROSEAU_MN_SWPPP

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Date Printed: 15 April 2014

Stormwater Pollution Prevention Plan

(SWPPP)

Project Name: Roseau Reach 1

Prepared by:

Owner: US Army Corps of Engineers (USACE)

Operator:

Preparation Date: April 2014

NPDES Permit #:

Doc Version: Version‐1

April 2014

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Stormwater Pollution Prevention Plan

(SWPPP)

Table of Contents

1 CONTACT INFORMATION/RESPONSIBLE PARTIES

1.1 Owner/Operator(s)/Emergency 24‐Hour Contact

1.1.1 Owner

1.1.2 Contractor/Operator

1.1.3 Emergency 24‐Hour Contact

1.2 Stormwater Team/Knowledgeable Person/Training Documentation

1.2.1 *Development (Person who will oversee the preparation of the SWPPP)

1.2.2 *Implement (Person who will oversee Implementation of the SWPPP)

1.2.3 *Modify (Person who will oversee Revisions and Amendments to the SWPPP)

1.2.4 *Install (Person who will oversee Installation of BMPs)

1.2.5 *Maintain (Person who will oversee Maintenance and Repair of the BMPs)

1.2.6 *Site Inspections (Person who will perform Site Inspections)

1.2.7 Corrective Actions (Person who will oversee Corrective Actions of the BMPs)

1.2.8 Permanent Stormwater Management System (Entity responsible for long‐term O&M)

1.3 Chain of Responsibility

2 SITE EVALUATION, ASSESSMENT, AND PLANNING

2.1 Project/Site Information/Project Location

2.2 Potential Sources of Pollution

2.3 Sequence and Estimated Timeline of BMP Installation

2.4 Quantities

2.5 Construction Site Estimates/Cumulative Impervious Surface

2.6 Maps

2.6.1 Project Site Maps

2.6.2 Surface Waters and Wetlands

2.7 Areas not to be Disturbed

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2.8 Construction Phasing

2.9 Karst Areas

2.10 Discharge Information

2.10.1 Receiving Waters

2.10.2 Special Waters

2.10.3 Impaired Waters

2.10.4 Wetlands

2.11 Environmental, Endangered Species, and Historical and Archeological Reviews

3 TEMPORARY EROSION PREVENTION AND SEDIMENT CONTROL PRACTICES

3.1 Minimize Disturbed Area, Protect Natural Features and Soil, Phase Construction

3.2 Temporary Site and Soil Stabilization

3.3 Natural Buffers or Equivalent Sediment Controls

3.4 Minimize the Disturbance of Steep Slopes

3.5 Stormwater Conveyance Channels, Drainage Ditch, and Swales

3.6 Down Gradient Perimeter Controls

3.7 Storm Drain Inlets

3.8 Stockpiled Sediment

3.9 Sediment Track‐Out

3.10 Temporary Sediment Basins

3.11 Chemical Treatments

3.12 Dewatering Practices

3.13 Other Stormwater Controls

4 PERMANENT STORMWATER MANAGEMENT

4.1 Infiltration/Filtration

4.2 Wet Sedimentation Basins

4.3 Regional Ponds

4.4 Other Volume Reduction Methods

4.5 Permanent/Final Site Stabilization

5 POLLUTION PREVENTION MANAGEMENT MEASURES

5.1 Storage, Handling, and Disposal of Construction Products, Materials, and Wastes

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5.2 Fueling and Maintenance of Equipment or Vehicles; Spill Prevention/Response

5.3 Vehicle and Equipment Washing

5.4 Concrete and Other Washout Waste

6 INSPECTIONS

6.1 Corrective Action/Amendments

6.2 Records Location

LIST OF SWPPP EXHIBITS

Exhibit A Site Maps, Exhibit B Copy of General Permit‐MNR100001

Exhibit C Copy of Application for General Stormwater Permit for Construction Activity

Exhibit D Inspection Form

Exhibit E Corrective Action Form

Exhibit F SWPPP Amendment Log

Exhibit G Grading and Stabilization Activities Log

Exhibit H SWPPP Training Documentation

Exhibit I Spill Reporting

Exhibit J Copy of Notice of Termination (NOT)/Permit Modification Form

Exhibit K Permanent Stormwater Management System Design Parameters

Exhibit L Pertinent Stormwater Permits (DNR Public Waters Work Permit 2010‐0396)

Exhibit M Plans and Specifications

Exhibit N Soils Data/Rainfall Data

The use of the word “Permit” refers to the Minnesota General Permit No. MN R 100001, which is attached as Exhibit B. The bolded words in the following questions and sections of this Template are defined in the Permit’s Appendix B Definitions Section.

DISCLAIMER:

The SWPPP template is intended solely as an optional tool to assist contractors with their preparation of a SWPPP for review by the Corps and ultimate submittal to the State of Minnesota for General

Permit MN R 100001 with expiration date August 01, 2018. Additional information beyond that identified in the template may be required by the State. The contractor is required to comply with the

State's application requirements and the applicable General Permit. In providing this tool, the Corps is not assuming any responsibility for the adequacy of the contractor's SWPPP.

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Stormwater Pollution Prevention Plan

(SWPPP)

1 CONTACT INFORMATION/RESPONSIBLE PARTIES

1.1 Owner/Operator(s)/Emergency 24‐Hour Contact

1.1.1 Owner

Company or Organization Name: US Army Corps of Engineers (USACE)

Name/Title: Judy DesHarnais, Deputy for Programs and Project Management

Address: 180 5th Street E, Suite 700

City, State, Zip Code: St. Paul, MN 55101

Telephone: 651‐290‐5298

Fax/Email: Judith.l.desharnais@usace.army.mil

1.1.2 Contractor/Operator

Company or Organization Name:

Name/Title:

Address:

City, State, Zip Code:

Telephone:

Fax/Email:

1.1.3 Emergency 24‐Hour Contact

Company or Organization Name:

Name/Title:

Address:

City, State, Zip Code:

Telephone:

Fax/Email:

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1.2 Stormwater Team/Knowledgeable Person/Training Documentation

See Permit, III.A.2.‐ Knowledgeable Person Identify a person knowledgeable and experienced in the application of erosion prevention and sediment control BMPs who will oversee the implementation of the SWPPP, and the installation, inspection and maintenance of the erosion prevention and sediment control BMPs before and during construction.

See Permit, III.A.3.‐Training Documentation, and III.F.‐Training Requirements Ensure individuals have been trained in accordance with the Permit’s training requirements.

See Exhibit H for Training Documentation *Attach training documentation for each individual required to be trained.

1.2.1 *Development (Person who will oversee the preparation of the SWPPP)

Company or Organization Name:

Name/Title:

Address:

City, State, Zip Code:

Telephone: Cell:

Fax: Email:

1.2.2 *Implement (Person who will oversee Implementation of the SWPPP)

Company or Organization Name:

Name/Title:

Address:

City, State, Zip Code:

Telephone: Cell:

Fax: Email:

1.2.3 *Modify (Person who will oversee Revisions and Amendments to the SWPPP)

Company or Organization Name:

Name/Title:

Address:

City, State, Zip Code:

Telephone: Cell:

Fax: Email:

1.2.4 *Install (Person who will oversee Installation of BMPs)

Company or Organization Name:

Name/Title:

Address:

City, State, Zip Code:

Telephone: Cell:

Fax: Email:

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1.2.5 *Maintain (Person who will oversee Maintenance and Repair of the BMPs)

Company or Organization Name:

Name/Title:

Address:

City, State, Zip Code:

Telephone: Cell:

Fax: Email:

1.2.6 *Site Inspections (Person who will perform Site Inspections)

Company or Organization Name:

Name/Title:

Address:

City, State, Zip Code:

Telephone: Cell:

Fax: Email:

1.2.7 Corrective Actions (Person who will oversee Corrective Actions of the BMPs)

Company or Organization Name:

Name/Title:

Address:

City, State, Zip Code:

Telephone: Cell:

Fax: Email:

1.2.8 Permanent Stormwater Management System (Entity responsible for long‐term O&M)

Company or Organization Name:

Name/Title:

Address:

City, State, Zip Code:

Telephone: Cell:

Fax Email:

1.3 Chain of Responsibility

See Permit, III.A.2.

Describe the Chain of Responsibility developed with all operators on the site, or if not known, the title or position of the responsible party, to ensure that the SWPPP will be implemented and stay in effect until the construction project is complete, the entire site has undergone final stabilization, and a Notice of Termination (NOT) has been submitted to the Minnesota Pollution Control Agency (MPCA):

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2 SITE EVALUATION, ASSESSMENT, AND PLANNING

2.1 Project/Site Information/Project Location

See Permit, III.A.1.

Describe the nature of the construction activity:

Roseau Reach 1‐ A 1.2 mile excavated diversion channel with a bottom width of 150 feet, 1V:5H side slopes, and maximum depth of about 16 feet, begins 1,600 feet south of TH 11 and extends 6,500 feet to the Roseau River. The major features of Reach 1 includes: a diversion channel inlet structure consisting of a sheet pile weir with riprap and rock bedding, a cast‐in‐place concrete restriction structure on the Roseau River with an 80‐foot span pedestrian bridge, approximately 1.5 miles of bituminous paved multi‐use trail, and landscaping to be planted in the designated spoil areas.

The construction activity will include clearing, grading, filling and excavating with land disturbance resulting in a change of topography and existing soil cover.

Project Type:

Residential Commercial/Industrial Road Construction Residential/Road Construction Commercial/Road Construction Commercial/Residential/Road Construction Other (describe): Diversion Channel excavation and Restriction Structure

Project Location

Briefly describe where the construction activity occurs:

The city of Roseau and the area immediately adjacent to the east. Reach 1 will include the area from the Roseau River at the City Park in the south end of the City to just south of the former Minnesota Northern Railroad tracks approximately 1,600 feet south of TH 11.

Address: State: MN Zip Code: 56751

All cities where construction will occur:

Roseau

All counties where construction will occur:

Roseau

All townships where construction will occur:

Latitude (approx. centroid of project):

48d 50’ 10.11’’

Longitude (approx. centroid of project):

95d 44’ 21.69’’

Method used to collect latitude and longitude:

GPS USGS topographic map‐map scale:

Other: Project control point conversion using Corpscon

Township Range Section ¼ Section ¼ Section

162N

40W 39W

41,42,43,44 24,331,32,33,34

*Attach Parcel Identification (Parcel ID#) Table if available.

Dates of Construction

Estimated Start Date (mm/dd/yyyy):

August 2014

Estimated Completion Date (mm/dd/yyyy):

August 2015

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2.2 Potential Sources of Pollution

See Permit, III.A.1.

Identify the potential for discharge of sediment and/or other potential pollutants from the site:

2.3 Sequence and Estimated Timeline of BMP Installation

See Permit, III.A.4.

Describe the timing for installation of all erosion prevention and sediment control BMPs and permanent stormwater management systems.

Intended Sequence of BMP Installation Estimated Timeline of Activity

Activity Start Date Activity End Date

2.4 Quantities

See Permit, III.A.5.b.

Estimated Preliminary Quantities Tabulation

List all anticipated erosion prevention and sediment control BMP quantities estimated at the start of the project for the life of the project (e.g. linear feet of silt fence, ft2 of erosion blanket, tons mulch, etc.):

Description Quantity Unit

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2.5 Construction Site Estimates/Cumulative Impervious Surface

See Permit, III.A.5.c.

Impervious Surfaces include constructed hard surfaces (e.g. rooftops, sidewalks, patios, driveways, parking lots, storage areas, and concrete, asphalt, or gravel roads)

Project Area (Acres)

Total Area to be disturbed: 109.1 (tenths of an acre)

Pre‐construction (existing) area of impervious surface: 0.2 (tenths of an acre)

Post‐construction area of impervious surface: 2.6 (tenths of an acre)

Total new impervious surface area: 2.4 (tenths of an acre)

2.6 Maps

2.6.1 Project Site Maps

See Permit, III.A.5.d.‐e.

Site Maps shall show the following items. Indicate Sheet Identification Number of plan sheets or location within SWPPP to find Site Maps and information indicated below.

Sheet Identification Number/ Location in SWPPP

Site Map Items

N/A

N/A N/A N/A N/A N/A Exhibit A&N, B‐201‐B‐206

N/A Exhibit M

Drainage patterns for pre‐construction stormwater runoff drainage areas indicating:

Flow Direction

Dividing Lines

Existing Grades

Final Grades Drainage patterns for post‐construction stormwater runoff drainage areas indicating:

Flow Direction

Dividing Lines

Existing Grades

Final Grades Areas of steep slopes and locations Locations of Impervious surfaces Soil types at the site Locations of potential pollutant‐generating activities identified under Pollutant Prevention Management Measures Construction Site Boundaries/Construction Limits Limits of Construction Phases Locations of areas not to be disturbed (e.g. buffer zones, wetlands, etc.)

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N/A N/A

N/A Exhibit A

Locations of areas where construction will be phased to minimize duration of exposed soils Temporary and Permanent Buffer zones Standard details for erosion and sediment control BMPs to be installed at the site.

Temporary Erosion Prevention and Sediment Control BMPs Permanent Erosion Prevention and Sediment Control BMPs Locations of all wetlands and surface waters receiving pre‐or post‐construction site runoff

2.6.2 Surface Waters and Wetlands

See Permit, III.A.5.g.‐Maps of Surface Waters and Wetlands

Sheet Identification Number/ Location in SWPPP

Site Map Items (Identify with plan arrow if off sheet view)

N/A Exhibit A N/A Exhibit A N/A N/A N/A N/A Exhibit A

Surface Waters Existing Wetlands Stormwater Ponds Identify Special Waters Identify Impaired Waters Portions of the site that drain to a public water with DNR “work in water restrictions” during fish spawning timeframes

2.7 Areas not to be Disturbed

See Permit, III.A.5.e.

Describe locations of areas not to be disturbed: Buffer zones, as required for temporary BMPs during construction in Permit, IV.C.9, or if required as permanent BMPs in Permit Appendix A, C.3 in must be described.

2.8 Construction Phasing

See Permit, III.A.5.f.

Describe locations of areas where construction will be phased to minimize duration of exposed soil areas:

2.9 Karst Areas

See Permit, III.A.7.‐Karst Areas

Is the project located in a karst area? Yes No If yes, describe additional or different measures necessary (e.g. impervious liner in pond bottom) to assure compliance with surface and groundwater standards in Minn. R. chs. 7050 and 7060 in karst areas and to ensure protection of drinking water supply management areas (see Minn. R. 4720.5100, subp. 13):

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2.10 Discharge Information

2.10.1 Receiving Waters

See Permit, III.A.8.

Identify surface waters within one mile of project boundary that will receive stormwater form the site or discharge from permanent stormwater management system. Include waters shown on USGS 7.5 minute quad or equivalent, and all Special Waters and Impaired waters. List all waters within one mile (aerial radius measurement) that are likely to receive stormwater runoff from the project site both during and after construction.

Are there any Receiving Waters within one mile of project property edge? Yes No

Receiving Waters within one mile of project property edge:

Water Body

ID*

Name of Water Body

Type (ditch, pond, wetland, calcareous fen, lake, stream, river)

Special Water** (See Permit Appendix A)

Impaired Water*** (See Permit Appendix A)

USEPA‐

approved TMDL

(See Permit Appendix A)

09020314‐

Roseau River (S Fk Roseau R to Hay Cr)

River Yes No Yes No Yes No

2025 TMDL

Target Date

*Water body identification (ID) might not be available for all water bodies. Use the Special and Impaired Waters Search tool available on MPCA website at http://www.pca.state.mn.us/water/stormwater/stormwater‐c.html ** Special waters identified under MN R100001, Appendix A, B.1.‐9.

***Impaired waters identified under section 303(d) of the federal Clean Water Act (CWA) for the following pollutants(s) or stressor(s): phosphorus (nutrient eutrophication biological indicators), turbidity, dissolved oxygen, or aquatic biota (fish bioassessment, aquatic plant bioassessment and aquatic macroinvertebrate bioassessment).

http://www.pca.state.mn.us/water/tmdl/index.html

2.10.2 Special Waters

See Permit Appendix A, B.1.‐9.

Does the site discharge to Special Waters listed below? Yes No If yes, identify the Special Water below:

Wilderness Areas Mississippi River Scenic or Recreational River Segments Lake Superior Lake Trout Lakes Trout Lakes Scientific and Natural Areas Discharges to these waters must incorporate the additional BMPs for Special Waters outlined in Permit, Appendix A, C.1, C.2, and C.3.

Trout Streams Discharges to these waters must incorporate the additional BMPs for Special Waters outlined in Permit, Appendix A, C.1, C.2, C.3, and C.4.

Calcareous Fens Discharges to these waters must incorporate the additional BMPs for Special Waters outlined in Permit, Appendix A, C.1 and C.2.

Additional BMPs and enhanced runoff controls are required for those areas of the project draining to a discharge point on the project that is within one mile (aerial radius measurement) of special water and flows to that special water.

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2.10.3 Impaired Waters

See Permit Appendix A, B.10‐Imparied Waters

See Permit, III.A.8.a.

Is the identification of impaired waters based on the most recent USEPA approved section 303(d) Clean Water Act list of impaired waters and USEPA approved TMDLs? Yes No http://www.pca.state.mn.us/water/tmdl/tmdl‐303dlist.html Source: 2014 Draft Impaired Waters List; (wq‐iw1‐47.xlsx)

Water Body ID: Name of Water Body

Pollutant(s) causing impairments:

Affected Designated Use:

09020314‐502 Roseau River Mercury in Fish Tissue Aquatic Consumption

Does the site discharge to Impaired Waters identified under section 303(d) of the federal Clean Water Act (CWA) for the following pollutants(s) or stressor(s): phosphorus (nutrient eutrophication biological indicators), turbidity, dissolved oxygen, or aquatic biota (fish bioassessment, aquatic plant bioassessment and aquatic macroinvertebrate bioassessment)? Yes No

Total Maximum Daily Load (TMDL)/Waste Load Allocation (WLA)

Impaired Water Without an Approved TMDL or with an Approved TMDL and no WLA See Permit, Appendix A, B.10.a.

Does runoff from the site discharge to an impaired water and a TMDL has not been approved by USEPA?

Yes No If yes, discharges to these waters must incorporate the BMPs outlined in Permit, Appendix A, C.1.

and C.2.

Does runoff from the site discharge to an impaired water and there is a USEPA approved TMDL that does not establish a WLA for construction stormwater? Yes No

If yes, discharges to these waters must incorporate the BMPs outlined in Permit, Appendix A, C.1.

and C.2.

Impaired Water With an Approved TMDL and WLA See Permit, Appendix A, B.10.b.

Does runoff from the site discharge to an impaired water for which there is a USEPA approved TMDL that established a WLA for construction stormwater? Yes No

If yes, does the TMDL identify specific implementation activities regarding construction stormwater that would apply to the site discharges? Yes No

If no, discharges to these waters must incorporate the BMPs outlined in Permit, Appendix A, C.1 and C.2.

If yes, identify the receiving water, the areas of the site discharging to it, and the pollutant(s) identified in the TMDL.

Receiving Water Site Area Discharging Pollutant(s) identified in TMDL

See Permit, III.A.8.b. & Appendix A, B.10.b.ii.

List the BMPs identified in the TMDL and any other specific construction stormwater related implementation activities and specific requirements identified in the TMDL applicable to the site discharges:

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Additional BMPs and enhanced runoff controls are required for discharges to the following impaired waters as defined in Permit Appendix, B.10. BMPs are required for those areas of the project draining to a discharge point on the project that is within one mile (aerial radius measurement) of impaired water and flows to that impaired water.

Additional BMPs for Special Waters and Impaired Waters See Permit, Appendix A, C

Are additional BMPs for Special and Impaired Waters required? Yes No

Yes No C.1 During construction

Yes No C.2 Post construction

Yes No C.3 Buffer Zone

Yes No C.4 Temperature Controls

2.10.4 Wetlands

See Permit, Appendix A, D.

Does the project have any discharges with the potential for significant adverse impacts to a wetland (e.g., conversion of a natural wetland to a stormwater pond)? Yes No

If yes, has the wetland mitigative sequence been followed in accordance with the following?

Have potential adverse impacts to a wetland been addressed by permits or other approvals from an official statewide program (U.S. Army Corps of Engineers 404 program, Minnesota DNR, or the State of Minnesota Wetland Conservation Act) that was issued specifically for the project and project site?

Yes No

If yes, the permit or determination issued by these agencies may be used to show that the potential adverse impacts have been addressed.

A 404(b)1 evaluation under the Clean Water Act (CWA) was completed as part of this project.

If no, all adverse impacts (e.g., permanent inundation or flooding of the wetland, significant degradation of water quality, excavation, filling, draining) to wetlands must be minimized by utilizing appropriate measures. Measures used must be based on the nature of the wetland, its vegetative community types, and the established hydrology. Describe the measures to avoid all significant adverse impacts to wetlands from the project and post‐project discharge. Or if describing the measures to avoid all significant adverse impacts to wetlands above is not feasible, then describe the measures to minimize any unavoidable impacts from the project and post‐project discharge:

If there is no reasonable and practicable alternative to having a significant adverse impact on a wetland, compensatory mitigation shall be provided where wetland restoration or creation shall be of the same type, size and whenever reasonable and practicable in the same watershed as the impacted wetland.

Has compensatory mitigation been provided? Yes No

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2.11 Environmental, Endangered Species, and Historical and Archeological Reviews

See Permit, III.A.6.

See Permit, Appendix A, E.‐Discharges requiring Environmental Review, F.‐Discharges affecting Endangered or Threatened Species, and G.‐Discharges affecting Historic Places or Archeological Sites

Stormwater mitigation measures required by and identified as a condition of required permits for environmental, endangered and threatened species, and historical and archaeological reviews were considered in preparation of this SWPPP.

An Environmental Assessment (EA) under the National Environmental Policy Act (NEPA) regulations was completed as part of this project.

A 404(b)1 evaluation under the Clean Water Act (CWA) was completed as part of this project.

The project is in compliance with Section 106 of the National Historic Preservation Act (NHPA).

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3 TEMPORARY EROSION PREVENTION AND SEDIMENT CONTROL PRACTICES

See Permit, III.A.1.

The SWPPP must propose erosion prevention and sediment control BMPs to control the discharge of sediment and/or other potential pollutants from the site.

See Permit, III.A.5.a.

The location and type of all temporary and permanent erosion prevention and sediment control BMPs along with procedures to be used to establish additional temporary BMPs as necessary for the site conditions during construction must be described. Standard details and/or specifications for the BMPs used on the project must be included in the final plans and specifications for the project.

See Permit, IV.B.‐Erosion Prevention Practices, and IV.C.‐Sediment Control Practices See Permit, IV.B.6.

Unless infeasible due to lack of pervious or vegetated areas, all discharges from BMPs must be directed to vegetated areas of the site (including any natural buffers) in order to increase sediment removal and maximize stormwater infiltration. Velocity dissipation devices must be used if necessary to prevent erosion when directing stormwater to vegetated areas.

Describe the types of temporary erosion prevention and sediment control BMPs expected to be implemented on this site during construction to control the discharge of sediment and/or other pollutants from the site:

Describe procedures to establish additional temporary BMPs as necessary for the site conditions during construction:

Describe methods to be used to promote infiltration and sediment removal on the site prior to offsite discharge, unless infeasible (e.g. direct stormwater flow to vegetated areas):

BMP Design Factors See Permit, III.A.5.i.

Describe the following factors used in designing the temporary erosion prevention and sediment control BMPs:

The expected amount, frequency, intensity, and duration of precipitation:

The amount of precipitation, frequency, intensity, and duration expected for the project area was based on NOAA Atlas 14 data for the Roseau, MN Station ID21‐7087. See Exhibit N.

Temporary BMPs used during construction are typically designed to function during peak flows from a storm event with a frequency of 2‐years and duration of 24‐hours. The precipitation for a 2‐year, 24‐ hour storm event in Roseau is 2.08 inches. The intensity (inches/hour) is based on the time of concentration for the contributing drainage area to the temporary BMP.

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The nature of stormwater runoff and run‐on at the site including factors such as expected flow from impervious surfaces, slopes, and site drainage features:

The project consists of a minimal amount of impervious surface. The vast majority of the project consists of constructing a diversion channel with 1V:5H side slopes and 1% channel bottom cross slope.

The lineal slope of the diversion channel is extremely flat (0.01% slope).

The spoil areas are designed with drainage swales around the exterior.

If any stormwater flow will be channelized at the site, the BMPs must be designed to control both peak flowrates and total stormwater volume to minimize erosion at outlets and to minimize downstream channel and streambank erosion:

The range of soil particle sizes expected to be present on the site:

The existing soils consist of mostly Hydrologic Soil Group (HSG) D. See Appendix N for additional soil information.

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3.1 Minimize Disturbed Area, Protect Natural Features and Soil, Phase Construction

BMP Description:

See Permit, III.A.5.j.‐Soil Management, IV.B.1., and IV.C.8.

Describe methods to be used to minimize soil compaction and preserve top soil (unless infeasible) at this site:

If applicable, describe additional erosion prevention BMPs to be implemented at the site to protect planned infiltration areas:

Describe additional erosion prevention measures that will be implemented at the site during construction that minimizes erosion as necessary to comply with the Permit and protect waters of the state (as defined in Minn Stat. 115.01, subd. 22). Examples of these measures include construction phasing, minimizing soil disturbance, vegetative buffers, horizontal slope grading:

BMP Installation:

See Permit, IV.B.1.

The location of areas not to be disturbed must be delineated (e.g., with flags, stakes, signs, silt fence etc.) on the project site before work begins.

Describe BMP Installation Process and Schedule:

BMP Inspection, Maintenance, and Cleanout Frequency:

See Permit, IV.E.

Describe BMP Inspection Process and Schedule:

Describe BMP Maintenance Process and Schedule:

Describe BMP Cleanout Frequency:

BMP Details and Specifications:

BMP Detail Attached: Yes No N/A

BMP Specification Attached: Yes No N/A

BMP Manufacturer Cut sheet Attached: Yes No N/A

*Attach additional sheets for multiple BMPs

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3.2 Temporary Site and Soil Stabilization

BMP Description:

See Permit, IV.B.2., and Appendix A, C.

Describe stabilization methods that will be initiated immediately to limit soil erosion whenever any construction activity has permanently or temporarily ceased on any portion of the site and will not resume for a period exceeding 14 calendar days:

A Minnesota Department of Natural Resources Amended Public Waters Work Permit 2010‐0396, Expiration Date: 04/04/2019 has been received for Reach 1. A Condition to the Permit, states “In the event the site cannot be stabilized with vegetation before September 15, all exposed soil shall be adequately mulched at a rate of not less than 3500 lbs./acre, leaving no more than 20% visible soil surface and maintained until seeding/sodding can be achieved.” See Exhibit L for the current DNR Permit.

Describe methods of temporarily stabilizing exposed soils and soil stockpiles (e.g., mulches, hydraulic tackifiers, erosion blankets, etc.):

See Permit, IV.B.2.

Stabilization must be completed no later than 14 calendar days after the construction activity in that portion of the site has temporarily or permanently ceased.

See Permit, Appendix A, C.

Stabilization of all exposed soil areas must be initiated immediately to limit soil erosion but in no case completed later than seven (7) days after the construction activity in that portion of the site has temporarily or permanently ceased.

Does the project have discharges to Public Waters that the Minnesota Department of Natural Resources has promulgated “work in water restrictions” during specified fish spawning time frames?

Yes No A Minnesota Department of Natural Resources Amended Public Waters Work Permit 2010‐0396, Expiration Date: 04/04/2019 has been received for Reach 1. A Condition to the Permit, states “No activity affecting the bed of the protected water may be conducted between March 15 and June 15, to minimize impacts on fish spawning and migration.” See Exhibit L for the current DNR Permit.

If yes, All exposed soil areas that are within 200 feet of the water’s edge, and drain to these waters must complete the stabilization activities within 24 hours during the restriction period.

Were additional BMPs and enhanced runoff controls required during construction for Special Waters and Impaired Waters? Yes No

If yes, stabilization of all exposed soil areas must be initiated immediately to limit soil erosion but in no case completed later than seven (7) days after the construction activity in that portion of the site has temporarily or permanently ceased.

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BMP Inspection, Maintenance, and Cleanout Frequency:

BMP Specification Attached: Yes No N/A

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3.3 Natural Buffers or Equivalent Sediment Controls

See Permit, IV.C.9., and Appendix A, B.

BMP Description:

Is the surface water located within 50 feet of the project’s earth disturbances and the stormwater flows to the surface water? Yes No

If yes, a 50 foot natural buffer must be preserved or (if a buffer is infeasible on the site), redundant sediment controls must be provided.

Describe if a natural buffer is being preserved or describe redundant sediment controls to be provided:

The Roseau River is within 50 feet of the project’s earth disturbances at the Restriction Structure. It is not feasible to preserve a natural buffer in this location as the project includes work within the Roseau River.

Were additional BMPs and enhanced runoff controls required for Special Waters (as defined in Permit, Appendix A, B.1‐B,9) that required a Buffer Zone in Permit, Appendix A, C.3? Yes No

If yes, an undisturbed buffer zone of not less than 100 linear feet from the special water (not including tributaries) and this buffer zone shall be maintained at all times, both during construction and as a permanent feature post construction, except where a water crossing or other encroachment is necessary to complete the project.

Fully document the circumstance and reasons that the buffer encroachment is necessary in the SWPPP and include restoration activities. Replacement of existing impervious surface within the buffer is allowed under this Permit. All potential water quality, scenic and other environmental impacts of these exceptions must be minimized by the use of additional or redundant BMPs and documented in the SWPPP for the project:

BMP Specification Attached: Yes No N/A

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BMP Manufacturer Cut sheet Attached: Yes No N/A

Documentation of Infeasibility

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3.4 Minimize the Disturbance of Steep Slopes

See Permit, III.C. and Temporary Sediment Basins Temporary sediment basins where appropriate in areas with steep slopes or highly erodible soils are encouraged, but not required, even if less than ten (10) acres drains to one area.

See Permit, IV.B.1.

BMP Description:

Describe methods to be used to minimize the disturbance of steep slopes:

Describe methods to be used when steep slopes must be disturbed such as phasing and stabilization practices (e.g. slope draining and terracing) designed for steep slopes:

BMP Specification Attached: Yes No N/A

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3.5 Stormwater Conveyance Channels, Drainage Ditch, and Swales

BMP Description:

See Permit, IV.B.3., and IV.B.4.

Describe erosion controls and velocity dissipation devices (e.g., check dams, sediment traps, riprap, or grouted riprap at outlets) within and along the length of any constructed stormwater conveyance channel, and at any outlet, to provide a non‐erosive flow velocity, to minimize erosion of channels and their embankments, outlets, adjacent stream banks, slopes, and downstream waters during discharge conditions:

A Minnesota Department of Natural Resources Amended Public Waters Work Permit 2010‐0396, Expiration Date: 04/04/2019 has been received for Reach 1. A Condition to the Permit, states “Any work below the water level shall be encircled by a flotation sediment curtain to prevent sediment from being transported beyond the construction site.” See Exhibit L for the current DNR Permit.

Describe methods to be used for stabilization of ditch and swale wetted perimeters 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: (Note that mulch, hydraulic soil tackifiers, hydromulches, polyacrylamide, etc. are not acceptable soil stabilization methods for any part of a drainage ditch or swale)

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BMP Inspection, Maintenance, and Cleanout Frequency:

See Permit, IV.E.

See Permit, IV.E.5.c.

Surface waters, including drainage ditches and conveyance systems, must be inspected for evidence of erosion and sediment deposition during each inspection. All deltas and sediment deposited in surface waters, including drainage ways, catch basins, and other drainage systems must be removed, and the areas where sediment removal results in exposed soil must be restabilized. The removal and stabilization must take place within seven (7) days of discovery unless precluded by legal, regulatory, or physical access constraints. Use all reasonable efforts to obtain access. If precluded, removal and stabilization must take place within seven (7) calendar days of obtaining access. Contact all local, regional, state and federal authorities and receive any applicable permits prior to conducting any work in surface waters.

Stabilize the normal wetted perimeter of any temporary or permanent drainage ditch or swale that drains water from anyportion 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.

Stabilization of the remaining portions of any temporary or permanent ditches or swales must be complete within 14 calendar days after connecting to a surface water or property edge and construction in that portion of the ditch has temporarily or permanently ceased.

Temporary or permanent ditches or swales that are being used as a sediment containment system during construction (with properly designed rock‐ditch checks, bio rolls, silt dikes, etc.) do not need to be stabilized during the temporary period of its use as a sediment containment system. These areas must be stabilized within 24 hours after no longer being used as a sediment containment system.

BMP Specification Attached: Yes No N/A

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3.6 Down Gradient Perimeter Controls

See Permit, IV.C.2.

Sediment control practices must be established on all down gradient perimeters and be located upgradient of any buffer zones.

Describe methods and BMPs to be used for down grading perimeter control:

See Permit, IV.C.2.

The perimeter sediment control practice must be in place before any upgradient land‐disturbing activities begin. These practices shall remain in place until Final Stabilization has been established.

See Permit, IV.C.1.b., IV.E., and IV.E.5.a.

All perimeter control devices must be repaired, replaced, or supplemented when they become nonfunctional or the sediment reaches one‐half (1/2) of the height of the device. These repairs must be made by the end of the next business day after discovery, or thereafter as soon as field conditions allow access.

If the down gradient sediment controls are overloaded (based on frequent failure or excessive maintenance requirement), additional upgradient sediment control practices or redundant BMPs to eliminate the overloading must be installed, and the SWPPP must be amended to identify these additional practices.

BMP Specification Attached: Yes No N/A

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3.7 Storm Drain Inlets

See Permit, IV.C.4.

All storm drain inlets must be protected by appropriate BMPs during construction until all sources with potential for discharging to the inlet have been stabilized.

Describe methods and BMPs to be used for storm drain inlet protection:

See Permit, IV.E., and IV.C.4.

Inlet protection may be removed for a particular inlet if a specific safety concern (street flooding/freezing) has been identified or the jurisdictional authority (e.g., city/county/township/MnDOT engineer). The need for removal in the SWPPP must be documented.

BMP Specification Attached: Yes No N/A

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3.8 Stockpiled Sediment

BMP Description:

See Permit, IV.C.5.

Describe effective sediment controls and BMPs to be used to contain temporary soil stockpiles:

Describe where temporary soil stockpiles (which must have silt fence or other effective sediment controls) will be located to avoid being placed in any natural buffers or surface waters, including stormwater conveyance systems such as curb and gutter systems, or conduits and ditches unless there is a bypass in place for stormwater:

See Permit, IV.B.2.

Temporary stockpiles without significant silt, clay or organic components (e.g., clean aggregate stockpiles, demolition concrete stockpiles, sand stockpiles) and the constructed base components of roads, parking lots and similar surfaces are exempt from the requirement to stabilize exposed stockpiles within 14 days but must comply with Permit, IV.C.5.

BMP Specification Attached: Yes No N/A

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3.9 Sediment Track‐Out

BMP Description:

See Permit, IV.C.6.

Describe vehicle tracking BMP (e.g., rock pads, mud mats, slash mulch, concrete or steel wash racks, or equivalent systems) to minimize the track out of sediment from the construction site:

See Permit, IV.E.5.d.‐e.

Construction site vehicle exit locations must be inspected for evidence of off‐site sediment tracking onto paved surfaces. Tracked sediment must be removed from all paved surfaces both on and off site within 24 hours of discovery, or if applicable, within a shorter time to comply with Permit, IV.C.6.

Streets and other areas adjacent to the project must be inspected for evidence of off‐site accumulations of sediment. If sediment is present, it must be removed in a manner and at a frequency sufficient to minimize off‐site impacts (e.g., fugitive sediment in streets could be washed into storm sewers by the next rain and/or pose a safety hazard to users of public streets).

BMP Specification Attached: Yes No N/A

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3.10 Temporary Sediment Basins

See Permit, III.C., IV.C.7. and Appendix A, C.

Sediment Basins must be situated outside of surface waters and any buffer zone required under Permit, Appendix A.C.3., and must be designed to avoid draining water from wetlands unless the impact to the wetland is in compliance with the requirements of Appendix A, D.

BMP Description:

Do ten (10) or more acres of disturbed soil drain to a common location? Yes No If yes, a temporary sediment basin is required to provide treatment to the runoff before it leaves the construction site or enters surface waters. Describe (or attach plans) showing how the basin will be designed and constructed:

Were additional BMPs and enhanced runoff controls required during construction for Special Waters and Impaired Waters? Yes No If the site is within 1 mile (aerial radius measurement) of special or impaired waters, do 5 or more acres of disturbed area drain to a common location? Yes No

If yes, a temporary sediment basin is required to provide treatment to the runoff before it leaves the construction site or enters surface waters. Describe (or attach plans) showing how the basin will be designed and constructed:

Project Specific: Temporary Sedimentation Basin Design Requirements:

1. Where appropriate, are temporary sediment basins installed in areas with steep slopes or highly erodible soils?

2. Are all basins sized or designed to provide live storage for a calculated volume of runoff from a two (2)‐year, 24‐hour storm from each acre drained to the basin, but in no case provides less than 1,800 cubic feet of live storage per acre drained to the basin? If yes, skip to question #4

3. If no, are all basins sized or designed to provide live storage of 3,600 cubic feet from each acre drained to the basin?

4. Are basin outlets designed to avoid short‐circuiting?

5. Are basin outlets designed to avoid the discharge of floating debris?

6. Are the basins designed to allow complete basin drawdown for maintenance activities?

7. Does the basin have a stabilized emergency overflow to prevent failure of pond integrity?

8. Does the basin outlet have an energy dissipater?

9. Has the outlet structure been designed to withdraw water from the surface to minimize discharge of pollutants?

*Include design specifications and other details (volume, dimensions, outlet structure) that will be implemented if a sediment basin will be installed.

See Permit, III.C.6.

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Is the use of temporary sediment basins infeasible for the project? Yes No If yes, describe the equivalent sediment control BMPs that will be used such as smaller sediment basins, and/or sediment traps, silt fences, vegetative buffer strips, or any appropriate combination of measures as required for all down‐slope boundaries of the construction area and for side‐slope boundaries as dictated by individual site conditions:

Describe methods to be used for energy dissipation at pipe outlets (e.g. riprap, splash pads, gabions, etc.):

See Permit, III.C.

The temporary basin is no longer required when permanent cover has reduced the acreage of disturbed soil to less than ten (10) acres draining to a common location.

See Permit, III.C.5.

The temporary basins must be constructed and made operational prior to 10 or more acres of disturbed soil draining to a common location.

See Permit, IV.B.5.

Pipe outlets must be provided with temporary or permanent energy dissipation within 24 hours after connection to a surface water.

See Permit, IV.E., and IV.E.5.b.

Temporary and permanent sedimentation basins must be drained and the sediment removed when the depth of sediment collected in the basin reaches one‐half (1/2) the storage volume. Drainage and removal must be completed within 72 hours of discovery, or as soon as field conditions allow access (see Permit, IV.D.).

BMP Specification Attached: Yes No N/A

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Documentation of Infeasibility

See Permit, III.A.5.m. and III.C.6.

If compliance with the requirement for temporary sediment basins (under Permit, III.C.) is infeasible on the project site (public safety and factors such as site soils, slope and available area on site must be considered), provide documentation of the determination:

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3.11 Chemical Treatments

See Permit, III.A.5.l.‐Chemical Treatments, and IV.C.10.

BMP Description:

Are specific chemicals proposed for enhancing the sedimentation process on site? Yes No If yes, describe any specific chemicals (polymers, flocculants) and the chemical treatment systems that may be used for enhancing the sedimentation process on site:

Describe how compliance will be achieved with the following requirements in Permit, IV.C.10.:

Describe how conventional erosion and sediment controls will be used prior to chemical addition to ensure effective treatment. Chemicals may only be applied where treated stormwater is directed to a sediment control system which allows for filtration or settlement of the floc prior to discharge:

Chemicals must be selected that are appropriately suited to the types of soils likely to be exposed during construction, and to the expected turbidity, pH, and flow rate of stormwater flowing into the chemical treatment system or area. Chemicals must be used in accordance with accepted engineering practices, and with dosing specifications and sediment removal design specifications provided by the manufacturer or provider/supplier of the applicable chemicals.

Describe plans for use of sedimentation treatment chemicals (e.g. polymers, flocculants, etc.):

BMP Specification Attached: Yes No N/A

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3.12 Dewatering Practices

See Permit, IV.D.

BMP Description:

Will the project include dewatering, basin draining? Yes No If yes, describe measures to be used to treat/dispose of turbid or sediment‐laden water and method to prevent erosion or scour of discharge points:

Describe BMPs used so the discharge does not adversely affect the receiving water or downstream properties:

Describe if an oil‐water separator or suitable filtration device (e.g. cartridge filters, absorbents pads) will be used if discharge water contains oil or grease prior to discharging the water:

Describe energy dissipation measures (such as whether the discharge will be dispersed over natural rock riprap, sand bags, plastic sheeting, or other accepted energy dissipation measures). These measures will be used to ensure that discharge points are adequately protected from erosion and scour:

Describe the plan for dewatering so as to not cause nuisance conditions, erosion in receiving channels or on downslope properties, or inundation in wetlands causing significant adverse impact to the wetland:

Will the project include use of filters for backwash water? Yes No If yes, describe how filter backwash water will be managed on the site or properly disposed:

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BMP Specification Attached: Yes No N/A

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3.13 Other Stormwater Controls

Describe any other stormwater controls that do not fit into the above categories.

BMP Specification Attached: Yes No N/A

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4 PERMANENT STORMWATER MANAGEMENT

See Permit, III.D., and Appendix A, C

Will the project’s ultimate development replace vegetation and/or other pervious surfaces with one (1) one or more acres of cumulative impervious surfaces or result in one acre or more of new impervious in total if the project is part of a larger common plan of development? Yes No

If yes, the project must be designed so that the water quality volume of one (1) inch of runoff from the cumulative new impervious surfaces created by the project must be retained on site (i.e.

infiltration or other volume reduction practices) and not discharged to a surface water.

Were additional BMPs and enhanced runoff controls required post construction for Special Waters and Impaired Waters? Yes No

If yes, the water quality volume that must be retained on site by the project’s permanent stormwater management system shall be one (1) inch of runoff from the new impervious surfaces created by the project.

Were additional BMPs and enhanced runoff controls required for temperature controls for Special Waters identified as Trout Streams? Yes No

If yes, the permanent stormwater management system shall be designed such that the discharge from the project will minimize any increase in the temperature of trout stream receiving waters resulting from the one (1) and two (2)‐year 24‐hour precipitation events.