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LETTER OF PERMISSION: The Bassett Creek Main Stem Stabilization Project includes bank stabilization activities within two portions of Bassett Creek in Minneapolis, MN.

PROJECT DESCRIPTION AND PURPOSE:The Bassett Creek Main Stem Stabilization Project includes bank stabilization activities within two portions of Bassett Creek in Minneapolis, MN. The purpose of the project is to stabilize eroding banks at targeted locations along these two segments of Bassett Creek. The primary objectives of the project include: reduction of sediment and nutrient loading, improvement of downstream water quality, prevention of future channel erosion, enhancement of natural habitat and species diversity, and maintenance of existing floodplain storage.

Information for File # MVP-2017-03270-MMJ; Bassett Creek Main Stem Stabilization Project Applicant: City of Minneapolis, Attention: Liz Stout Agent: Barr Engineering, Attention: Jeff Weiss Corps Contact: Melissa Jenny Address: U.S. Army Corps of Engineers St. Paul District, Regulatory Branch 180 East Fifth Street, Suite 700 St. Paul, Minnesota 55101-1678 E-Mail: Melissa.m.jenny@usace.army.mil Phone: (651) 290-5363 Primary County: Hennepin Location: Sections 20, 21 & 28, Township 29 North, Range 24 West Lat/Long (decimal degrees): X: 44.976556 Y: -93.298741 (Reach 1 centroid) X: 44.979127 Y: -93.313734 (Reach 2 centroid) Information Complete On: October 27, 2017 Posting Expires On: November 06, 2017 Authorization Type: LOP-05-MN This application is being reviewed in accordance with the practices for documenting Corps jurisdiction under Sections 9 & 10 of the Rivers and Harbors Act of 1899 and Section 404 of the Clean Water Act identified in Regulatory Guidance Letter 08-02. Project PROJECT DESCRIPTION AND PURPOSE: The Bassett Creek Main Stem Stabilization Project includes bank stabilization activities within two portions of Bassett Creek in Minneapolis, MN. Reach 1 includes approximately 2500 linear feet of stream located between Cedar Lake Road and the Bassett Creek Tunnel entrances. Reach 2 includes approximately 700 linear feet of stream between Glenwood Avenue North and the Soo Line Railroad Bridge. The purpose of the project is to stabilize eroding banks at targeted locations along these two segments of Bassett Creek. The primary objectives of the project include: reduction of sediment and nutrient loading, improvement of downstream water quality, prevention of future channel erosion, enhancement of natural habitat and species diversity, and maintenance of existing floodplain storage. Overall, the project includes: · Removing accumulated, non-native channel bed materials (i.e. brick and concrete block); · Installing a variety of streambank stabilization measures, including riprap, live fascines, vegetated reinforced soil slopes (VRSS) with riprap toe protection, and rock vanes; and · Restoring the vegetative buffer and improving streambank vegetation using a custom native seed mix that focuses on resilient species that are more resistant to invasive species and can better tolerate the surrounding industrial/urban environment.

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NAME, AREA AND TYPES OF WATERS (INCLUDING WETLANDS) SUBJECT TO LOSS: Work will primarily take place along the creek's banks across the entirety of both project reaches, though work below the ordinary high water mark (OHWM) of Bassett Creek will be required in targeted locations in order to meet the need and objectives of the project. The following activities will require dredge below the OHWM of Bassett Creek: excavation/grading of bank slopes and in-channel debris removal. The following activities will require placement of fill below the OHWL of Bassett Creek: riprap, live fascines, cross vanes, and riprap toe protection to support VRSS installation above the OHWM. In addition, an existing dirt walking path lies below the OHWM and will be improved on its existing alignment using articulated concrete. All soil material generated from project grading will be incorporated across the construction site, and soil transport/disposal is not anticipated. Stabilization work within Reach 1 of the project site would result in excavation activities and the discharge of fill material along approximately 2,500 linear feet (into approximately 0.49 acre) of streambed below the OHWM of Bassett Creek. Stabilization work within Reach 2 of the project site would result in excavation activities and the discharge of fill material along approximately 700 linear feet (into approximately 0.33 acre) of streambed below the OHWM of the creek. ALTERNATIVES CONSIDERED: Three other alternatives were considered, but ultimately discarded, for this project. The first alternative was to do nothing. Doing nothing was discarded as it would not meet the project objectives as it would not address existing erosion problems. A second alternative, bank armoring with riprap only, would achieve the purpose and objectives of the project. However, it was discarded as it would not enhance the natural ecosystem and aesthetics of the otherwise developed, industrial setting. A third alternative, providing stream bank stabilization using bioengineering alone, was also evaluated. This alternative would likewise achieve the purpose and objectives of the project. However, previous investigations completed in support of the project identified sites adjacent to the project area with historic soil contamination. While remediation of the contamination was previously completed, it was undesirable to disturb more soil than necessary, and substantial excavation is required to prepare a site for installation of certain bioengineering features (such as root wads). In the current project setting, there is reasonable potential that additional excavations could expose contaminated soils that are otherwise presently contained. As such, the third alternative was also discarded. The currently proposed project provides a balance between bioengineering and hard armoring in a way that introduces elements of bioengineering that require less substantive earthwork. COMPENSATORY MITIGATION: The applicant has not proposed to provide compensatory mitigation for this project. The project is intended to improve and stabilize two portions of Bassett Creek, and would not result in the loss of any stream functions or services. Drawings: See attached figures labeled as 2017-03270-MMJ; Figures 1-20

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Imagery: MnGeo; 2016

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Barr Footer: ArcGIS 10.4.1, 2017-09-08 11:31 File: I:\Client\Minneapolis\Project\23271579_Bassett_Creek_Main_Stem_Stab\Maps\MISC\20170828_Project_Area\Figure 1 - Project Area.mxd User: jrv

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2017-03270-MMJ, Figure 1 Project Stationing

Figure 1 BASSETT CREEK STUDY PROJECT AREA Bassett Creek Erosion Repair Feasibility Report Bassett Creek Watershed Management Commission

2017-03270-MMJ, Figure 2 Surface Waters Project Reach Access Impacted Area

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Reach 1

Bassett Creek

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Barr Footer: ArcGIS 10.4.1, 2017-09-08 15:28 File: I:\Client\Minneapolis\Project\23271579_Bassett_Creek_Main_Stem_Stab\Maps\MISC\20170828_Project_Area\Figure 2 - Reach 1 Access and Impacts.mxd User: jrv

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Figure 2

Imagery: MnGeo; 2016

REACH 1 ACCESS AND IMPACTS Bassett Creek Erosion Repair Feasibility Report Bassett Creek Watershed Management Commission

2017-03270-MMJ, Figure 3 Surface Waters Project Reach Access Impacted Area

Barr Footer: ArcGIS 10.4.1, 2017-09-08 15:27 File: I:\Client\Minneapolis\Project\23271579_Bassett_Creek_Main_Stem_Stab\Maps\MISC\20170828_Project_Area\Figure 3 - Reach 2 Access and Impacts.mxd User: jrv

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Figure 3

Imagery: MnGeo; 2016

REACH 2 ACCESS AND IMPACTS Bassett Creek Erosion Repair Feasibility Report Bassett Creek Watershed Management Commission

2017-03270-MMJ, Figure 4

Photo 1 ­ Steep eroding bank, Reach 1

Photo 4 ­ Steep bank with moderate erosion, Reach 2

Photo 2 ­ Bare lower banks, Reach 1

Photo 6 ­ Existing trail along Bassett Creek, Reach 2 (looking upstream)

Photo 3 ­ Stream bed debris and non-native material, Reach 1

2017-03270-MMJ, Figure 5

2017-03270-MMJ, Figure 6

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2017-03270-MMJ, Figure 18

2017-03270-MMJ, Figure 19

2017-03270-MMJ, Figure 20

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