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3. Boat Ramp Concept Plan 20151006CONCEPT PLAN 10I06/2015 C I NOTE: SITE EROSION CONTROL WILL CONSIST OF FIBER ROLLS ABOVE OHW. NO SILT CURTAIN WILL BE INSTALLED DUE TO ITS INEFFECTIVENESS AT CONTROLLING SEDIMENT DISPERSAL IN FLOWING WATER. SEE ATTACHED DETAIL FOR PROPOSED EXCAVATION DEPTH FOR PLANK INSTALLATION. GRAY_L EDGE, I 1 I • I I ` \ 69 691.33 GRA 697.3 GROUND v \ CONSIDER RE -GRADING UPPER �v �I LANDING AREA TO SLOPE TO THE I NORTHWEST INTO A TEMPORARY I \ 2DDB4 SEDIMENT BASIN 1\ L D69E9C.ILINE\ \ 269GDR DEno TREE UNE I I\ 20082 RRR698.62 GRAVELEDGEI \ I 99.2.2E \ GRAVELEDGE POTENTIAL PICNIC LOCATION WITH ROOM FOR INTERPRETIVE HISTORICAL SIGNAGE EDGE ISLEd9P 20098 X 691.96 GRODNO 20.23 Y 69817 \ GRAVELED E 1 I I 62oD91 I X .ROUND 20( y( 698.5 - 2 024 CLRAVEL GE 6 A ]31 GRAVEVE L EDGE 4E e21 ❑D TREE un��R � e. 20029' - 1 6ss 6 EFL DG maze 4m 697.85 GRAVEL EDG REMOVE ONE 8"TREE TO ELIMINATE LONG-TERM STABILIZATION ISSUES DRAINTILE PIPE WITH STABILIZED OUTLET STABILIZE ROADWAY BANKS WITH 18-36" BOULDERS OVER GEOTEXTILE FABRIC; SEED DISTURBED SLOPES WITH NATIVE SEED MIX AND FIBER BLANKET 2-3" CLEAR AGGREGATE SPILLWAY TO DISSIPATE FLOWS AND PREVENT EROSION (32) 12' WIDE CONCRETE PLANKS; SUPPLIED BY MN DNR; ANGLE RAMP DOWNSTREAM 14° OF PERPENDICULAR (SEE ATTACHED DNR STANDARD DETAIL) DISTURBANCE AREA BELOW OHW - 616 SF a e Et DGe 24% i E i 1 E E gM60P e 14 G A' EDGE IR 55�/J 1 z 12' LOGHOUSE LANDING BOAT RAMP STABILIZATION I 2% cross - slope x ST. CROIX RIVER BUILD UP GRADE (APPROX. 6") TO DIRECT WATER AWAY FROM TOP OF RAMP &Mv_MI I iVVLL LDGE I / I / STABILIZE WASHED OUT FOOT PATH WITH ROUGH CUT STONE STAIR / EROSION CONTROL / FIBER ROLL 1 X E80.080.05 EDGE OE WATER V 1 1 1 �61p.5-MSL 1912) TER GE20 OHW 680-MSL 1912� 20009 81.93 B /CLINN IG/95MSL 1912) X �sn N 6 4 8 16 mow X 680Az EDGE OF WATER B/RIVER I w a t e r ecology E(31community 50' (VARIES) BITUMINOUS OR (A 50' RAMP REQUIRES 38 PLANKS) AGGREGATE 5' SURFACE AS START VERTICAL SPECIFIED CURVE AT FOURTH PLANK 4_1 PLANTnnnnnnnnnnnn NO SCALE 4' WIDE IF NO DOCK IF BITUMINOUS, THICKEN TO 6" (3" LIFTS) AS SHOWN VERTICAL a CURVE TRANSITION FOR RAMP APPROACH; GRADE FOR 50' NOT TO FXCEED 10% d 9 LILJLJUUUUUUL1UUL.;uuuU J-I.- J4. EDGE OF m - 2" — 2-1 /2" GEOTEXTILE WATERS EDGE CRUSHED ROCK MAX. GRADE TRANSITION SHALL BE 5% WITHOUT A 1071i5' VERTICAL CURVE M 25' MIN. gq MAX. 137 �ooa� A - A' II aJl GEOTEXT MN/DOT TYPE IV a' (6' ON1 DOCK SIDE) B - B' I �. ,rl 'II 5"CONCRETE PLANK 6" CRUSHED ROCK BASE (12" SHOULDER) GEOTEXTILE TURN LAST THREE PLANKS DOWN AND INTO BOTTOM -\ 20`-3p dllf 31 MAX. 1,97 6" CRUSHED ROCK BASE BOTTOM :- � � I CONNECTOR - BREAK -AWAY DETAIL CONNECTOR NOTES: * REINFORCED PRECAST CONCRETE PLANKS - 12' LONG, 12" WIDE AND 5" THICK (APPROX. 750 POUNDS) WILL BE FURNISHED BY THE DNR. * CRUSHED ROCK, 2" - 2-1/2" DIA. SHALL BE USED FOR THE RAMP BASE, SHOULDERS, THE SPACE BETWEEN PLANKS, AND, IN THE CASE OF A DOUBLE RAMP. THE AREA BL FWEEN THE RAMPS. BUREAU OF ENGINEERING MINNESOTA DEPARTMENT OF NATURAL RESOURCES Designer Date BRACKE JAN 90 CONSTRUCTION DETAIL DesignSITE Unit/Region ST (Inds) 12 INCH CONCRETE PLANK SITE DEVELOPMENT Revision oot(S. BOAT RAMP DEC 99 (S.B.) SEPT 03 (S.B.) - Digital ® HardcopyW�r Sheet No,i n I_ I File No. rr n rn n n n -7 n