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4.2 Log House Landing Concept Plan 20160526 (1)w ater ecology c o mmunit y LOGHOUSE LANDING BOAT RAMP STABILIZATION CONCEPT PLAN 5/26/2016 DRAINTILE PIPE WITH STABLIZED OUTLET CONCRETE PAVEMENT ANCHORS AND DRAIN TILE CENTERED BETWEEN JOINTS; PER MNDOT STANDARD PLAN 5-297.235 (32) 12’ WIDE CONCRETE PLANKS; SUPPLIED BY MN DNR; ANGLE RAMP DOWNSTREAM 14˚ OF PERPENDICULAR (SEE ATTACHED DNR STANDARD DETAIL) - INSTALL PRIOR TO CONCRETE RAMP 10” DEPTH DRESSER (OR =) AGGREGATE SPILLWAY OVER COMPACTED FILL; 3-4” DIA. ABOVE DRAIN OUTLET; 6” DIA. BELOW DRAIN PIPE OUTLET STABILIZE WASHED OUT FOOT PATH WITH 36” WIDTH ROUGH CUT STONE STAIR - INSTALL PRIOR TO RAMP OVER GABION ANCHOR BASKETS BUILD UP GRADE (APPROX. 6”) TO DIRECT WATER AWAY FROM TOP OF RAMP 10” REINFORCED CONCRETE DRIVE RAMP, 12’ WIDTH - TOOLED, GROOVED SURFACE; EXCAVATE RAMP AREA 40” - IMPORT 30” COMPACTED FILL STABILIZE ROADWAY BANKS WITH 18-36” BOULDERS OVER GEOTEXTILE FABRIC; SEED DISTURBED SLOPES WITH NATIVE SEED MIX AND NETLESS FIBER BLANKET ST. CROIX RIVER 24% 13% 2% cross- slope EROSION CONTROL NETLESS FIBER ROLL CONCRETE PAVING JOINTS AT 15’ O.C. REMOVE BOULDERS AND STUMP FROM RAMP AREA PRIOR TO CONCRETE WORK INCREASE RAMP WIDTH 2-3’ AT OUTSIDE RADIUS - PER SITE CONDITIONS DISTURBANCE AREA BELOW OHW - 616 SF NOTE: SITE EROSION CONTROL WILL CONSIST OF FIBER ROLLS ABOVE OHW AND SILT CURTAIN AROUND UNDERWATER EXCAVATION AREAS. SEE ATTACHED DETAIL FOR PROPOSED EXCAVATION DEPTH OF PLANK INSTALLATION. DRAIN TILE AT PERIMETER OF CONCRETE RAMP NOTE: EOR HAS DEVELOPED THIS PLAN AS A CONCEPT FOR RAMP STABILIZATION ONLY. FINAL DIMENSIONS, MATERIALS, AND METHODS FOR CONSTRUCTION SHALL BE DETERMINED BY THE CONTRACTOR AND THE CITY OF SCANDIA. 40 8 16