Agenda - Council - 04/13/2021 - Laserfiche WebLink

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Record of Decision — Riverstone South Environmental Assessment Worksheet Minnesota Department of Transportation Noise Traffic noise from Highway 10 could exceed noise standards established by the Minnesota Pollution Control Agency (MPCA), the U.S. Department of Housing and Urban Development, and the U.S. Department of Transportation. MnDOT does not expend highway funds for noise mitigation measures related to new developments on existing highways. The project proposer is required to assess the existing noise situation and take the action deemed necessary to minimize the impact to the proposed development from any highway noise. Response The noise assessment included in the EAW indicated traffic noise that reaches Riverstone South from Highway 10 will be below the L50 daytime residential noise standard. The Riverstone South townhome nearest to the highway will be 525 feet from the Highway 10 right-of-way. The 30-foot buffer on the north side of Riverstone South will include a 3- to 4-foot-high undulating berm with planted conifer trees. No other noise mitigation measures are deemed necessary. Traffic MnDOT wants to continue to be involved as designs develop in the future. Response Comment noted. Multimodal When pedestrian facilities (i.e. the sidepath along US 10/US 169) are impacted due to maintenance or construction, pedestrian accommodations must be provided to the maximum extent feasible. Consider constructing sidewalks along both sides of the internal street network. Also consider constructing a sidepath/trail along the south side of Riverdale Drive. Response The EAW noted that the Mississippi Regional Trail is to be constructed in the future on property north of the site near the Highway 10 corridor. The proposed regional trail corridor is outside of the Riverstone South project area. The Riverdale Drive right-of-way will include space for a trail or sidewalk south on the south side of Riverdale Drive and north of Riverstone South. This trail may serve as the regional trail. The proposed project plan includes sidewalks along one side of most residential streets. Water Resources MnDOT recommended culvert and ditch treatments for the Bowers Drive cul-de-sac and a connection from Riverdale Drive to Highway 10 westbound. Hydraulics information will be required to assess any impacts to MnDOT right-of-way from Pond 300 in Outlot B. A drainage permit is required. The development will need to maintain or reduce existing drainage flow rates to MnDOT right of way. The "lake" identified in Outlot G does not show an outlet. An outlet would be prudent for the possibility of back-to-back 100-year events or a super -event. 2