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Lake Johanna Boulevard Trail Design Study Preliminary Design Development Report 10 September 27, 2022 Figure 7: Looking east from Siems Court towards Old Snelling Avenue Private Property Impacts Adjacent residential properties abut the roadway along the majority of the corridor and include varying setbacks from the edge of the pavement. Private homes and garages are located closer to the east side of the roadway right of way between Sandeen Road and Stowe Avenue than the west side. Driveways are typically wider on the east than west as well in this area. Between Tony Schmidt Regional Park and Siems Court several private homes and garages are located as close as ten feet from the right of way along the south side of the roadway. The existing right of way widths are anticipated to accommodate the spatial needs for traffic and the trail without acquisition of additional right of way. However, proximity of private homes and garages and driveway parking are much closer and constrained along the east and south sides of the corridor as noted above and should be considered with selection of the trail location. Private landscaping improvements within the existing right of way, including landscaping, mailboxes, fences and walls will need to be evaluated for potential relocation as a part of detailed design. Preliminary review of the corridor does not indicate significant relocation needs for private elements. Storm Drainage Infrastructure Existing storm drainage infrastructure includes a non-standard collection of ditches, culverts catch basins and piping constructed at different times and varying effectiveness in managing storm runoff. Existing stormwater runoff generated in the corridor is generally not treated or filtered prior to discharging or flowing to Lake Johanna or other natural receiving wetland areas. The project should consider the following improvements related to improving stormwater quality prior to discharging to natural water bodies: • Explore and identify locations to intercept runoff and filter or infiltrate prior to entering Lake Johanna and the wetland complex within Tony Schmidt Regional Park. • Consider stormwater basin design as visual amenities for trail users. • Consider meandering of trail alignment to promote space for water quality infrastructure.