3. LHL Exhibit BOption One: Existing Road Surface
Re -engineered
ACTIONS
•Re-grade the road to the north and landing to north and west to provide 4% in-slope to keep runoff away from Gilbertson Creek and the Saint Croix River
•Use rocks from existing road to create small 1-1 ½ ‘ rock ditch on north side of lower road (starting at Quint) to slow water
•Install two shallow sedimentation ponds (half way down the road and by the landing) to allow for infiltration, evaporation and trap sedimentation before reaching the Saint Croix River
•Establish a road maintenance and storm water management plan
•Restore the Saint Croix River and Gilbertson Creek banks
RESULTS
•Will reduce erosion and will improve road performance. Sediment will collect in ponds and can be removed as needed
•Minimal construction that significantly limits environmental impact
•No new materials added to the road
•Provides 14 Turnout Areas for passing or Emergency Vehicle Parking: 8 Turnouts on South Side of Road and 6 Turnouts on North Side of Road
•Maintains the rural and historic character of the area
•Maintains protective tree canopy
•Supports the size and type of watercraft appropriate for this section of the river
•Compliant with the Scandia Comprehensive Plan
•Lowest Relative Cost = $
NOTE: Items in read note differences between Option One and Option Two
10