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Proposal / Scope of Work The City of Arden Hills is planning a rehabilitation project for the tennis court located in Johanna Marsh Park. The playing surface is severely degraded and is currently closed to the public. The City requested assistance from Ramsey County to determine the boundary of the wetland adjacent to the tennis court in preparation for the project. The park is located in the southwest corner of an 8.97-acre city owned parcel at 3168 Ridgewood Rd. The parcel is mostly wetland surrounded by residential housing. Ridgewood Road borders on the west with private property along the south boundary, Snelling Avenue 350 feet to the east, and Lake Johanna 670 feet to the northwest. A staff person from Ramsey County with MnWDCP Wetland Delineator certification performed a wetland delineation of the site on August 18, 2016. The delineation used standards set in the Army Corps of Engineers 1987 Wetland Delineation Manual and the 2012 Northcentral and Northeast Regional Supplement. Ramsey County submits this report for WCA Technical Evaluation Panel review on the behalf of the City of Arden Hills. Map Review The National Wetland Inventory and Public Waters Inventory map layers (See Figure 2. Johanna Marsh Park NWI-PWI Map) indicate a long-term presence of a wetland on the parcel. The NWI layer maps a 1.03-acre Freshwater Pond / Deep Marsh. The PWI layer labels the 7.26-acre area as Public Water Wetland #62-0199. Table 1 (below) shows the aerial map review for the site: Table 1 – Historical Aerial Review Summary (D = Dry, N = Normal, W = Wet Year) 1940 (D) 1953 (N) 1974 (D) 1985 (W) 1991 (W) 2003 (N) Wetland #62-0199 Basin is wet in the center. Wetland vegetation may extend under tennis court location. Drainage ditches are present flowing northwest. Wetland vegetation more evident in the northern half of the parcel. Area under the tennis court location may be an upland/wetland transition. Darker, possible wetland vegetation is more prevalent extending southwest to the tennis court location. Development of parcel to the northwest altered the drainage ditch. Wetland area looks “wetter”. Visible wetland vegetation extends toward the south end of the parcel along east side of the tennis court. It appears to stop before reaching the southern edge of the court. The wetland footprint is similar to the 1985 aerial. The wetland width is wider at the southern tip than in 1985. The wetland is mostly unchanged. More tree growth around the perimeter. Wetland footprint ends north of southern edge of tennis court. City of Arden Hills - Johanna Marsh Park Tennis Court Rehab Page 3 of 24