FOR CRITICAL AREAS ADJACENT TO WETLANDS OR BELOW LONG AND/OR STEEP SLOPES, STEEL POSTS ARE NECESSARY AS INDICATED ON THE PLANS.

Transcription

1 WOOD OR STEEL FENCE POST (T-POST), MINIMUM 5' LONG, 6' MAXIMUM SPACING. STEEL POSTS: POST NOTCHES TO FACE AWAY FROM FABRIC. WOOD POSTS: ATTACH FABRIC TO POSTS WITH WOOD LATH A MINIMUM 1/4" THICK x 9" LONG WITH HEAVY DUTY STAPLES. STEEL POSTS: ATTACH FABRIC TO POSTS WITH MINIMUM 3 ZIP TIES (50 LB. TENSILE) PER POST IN TOP 8" OF FABRIC. MONOFILAMENT GEOTEXTILE FABRIC PER MNDOT TABLE (MS, HI WOVEN GEOTEXTILE). DIRECTION OF SURFACE FLOW MACHINE SLICE 8"-12" DEPTH (PLUS 6" FLAP) A 24" MINIMUM POST EMBEDMENT NOTE: THE MACHINE SLICED METHOD (THIS DETAIL) IS THE STANDARD SILT FENCE INSTALLATION METHOD. WIRE BACKED (ERO-1B) OR HEAVY DUTY (ERO-1C) SILT FENCE INSTALLATION METHODS SHOULD ONLY BE USED WHEN APPROVED OR DIRECTED BY THE CITY. NOTE: FOR CRITICAL AREAS ADJACENT TO WETLANDS OR BELOW LONG AND/OR STEEP SLOPES, STEEL POSTS ARE NECESSARY AS INDICATED ON THE PLANS. A COMPACTION: AFTER "SLICING" IN THE FABRIC AND BEFORE INSTALLATION OF STEEL OR WOOD POSTS, DRIVE INSTALLATION EQUIPMENT OVER THE "SLICE" WHILE FABRIC IS LAYING ON THE GROUND. THEN INSTALL THE POSTS AND PULL UP FABRIC TO ATTACH AT A UNIFORM HEIGHT. SILT FENCE MACHINE SLICED ERO-1

2 STEEL FENCE POST (T-POST) MINIMUM 5' LONG, 6' MAXIMUM SPACING. MONOFILAMENT GEOTEXTILE FABRIC PER MNDOT TABLE (MS, HI WOVEN GEOTEXTILE.) POST NOTCHES TO FACE AWAY FROM FABRIC. ATTACH FABRIC TO POST WITH MINIMUM 3 ZIP TIES (50 LB. TENSILE) PER POST IN TOP 8" OF FABRIC. LAY FABRIC IN THE TRENCH, BACKFILL WITH NATURAL SOIL, AND COMPACT WITH LIGHT EQUIPMENT PRIOR TO PLACEMENT OF THE POSTS. DIRECTION OF SURFACE FLOW 6" 24" MINIMUM POST EMBEDMENT 6" NOTES: 1. SPLICING WILL BE MADE AT OPPOSING SILT FENCE POSTS BY PLACING POSTS AND SILT FENCE NEXT TO EACH OTHER AND ROTATING HEAVY DUTY SILT FENCE IS MACHINE SLICED TYPE SILT FENCE THAT IS HAND INSTALLED IN AREAS INACCESSIBLE TO EQUIPMENT DUE TO SPACE LIMITATIONS, WET SOILS, STEEP SLOPES, ETC. SILT FENCE HEAVY DUTY JAN 2015 ERO-2

3 WIRE OR 3PLASTIC ZIP TIES (50 LB. TENSILE) WITHIN THE TOP 8" OF FABRIC BARRIER METAL FENCE POST BARRIER BARRIER METAL FENCE POST WIRE OR 3PLASTIC ZIP TIES (50 LB. TENSILE) WITHIN THE TOP 8" OF FABRIC GEOTEXTILE FABRIC BARRIER ELEVATION PLAN BARRIER WITHOUT CABLE RINGS REBAR BETWEEN ANCHOR RINGS OR METAL FENCE POST IN ABSENCE OF RINGS GEOTEXTILE FABRIC 36" WIDTH MIN. BARRIER WIRE OR PLASTIC ZIP TIES (50 LB TINSILE) CABLE RING BARRIER GEOTEXTILE FABRIC CABLE RING PLAN ISOMETRIC BARRIER WITH CABLE RINGS, SUPER DUTY SILT FENCE SUPER DUTY PERIMETER CONTROL SILT FENCE / CONCRETE BARRIER SYSTEM DEC 2018 ERO-3

4 DIRECTION OF FLOW 36" BERM SIDEWALK (VARIABLE WIDTH) BOULEVARD (VARIABLE) STREET 12" BERM 12" SIDEWALK 4"-6" BOULEVARD SECTION 3" CURB STREET SHREDDED MULCH, STRAW MULCH, OR SOD PLAN BERM OR APPROVED EQUAL DRIVEWAY OR ROCK ENTRANCE MACHINE SLICED SILT FENCE DIRECTION OF FLOW SIDEWALK (VARIABLE WIDTH) BOULEVARD (VARIABLE) STREET MACHINE SLICED SILT FENCE 24" EXTEND SILT FENCE & SHREDDED MULCH, STRAW MULCH, SOD OR EQUAL TO PERIMETER OF ENTRANCE SIDEWALK 4"-6" BOULEVARD 3" CURB STREET SHREDDED MULCH, STRAW MULCH OR SOD PLAN SILT FENCE SECTION BACK OF CURB PERIMETER CONTROL WITH SIDEWALK ERO-4

5 36" 12" BERM 12" CURB STREET DIRECTION OF FLOW BERM CURB STREET SECTION DRIVEWAY OR ROCK ENTRANCE PLAN BERM OR APPROVED EQUAL MACHINE SLICED SILT FENCE EXTEND SILT FENCE & SHREDDED MULCH, STRAW MULCH, SOD OR EQUAL TO PERIMETER OF ENTRANCE MACHINE SLICED SILT FENCE CURB STREET DIRECTION OF FLOW CURB STREET 3"-5" 24" PLAN SILT FENCE SECTION BACK OF CURB PERIMETER CONTROL NO SIDEWALK ERO-5

6 ANCHOR TRENCH (SEE DETAIL AND NOTES BELOW) OVERLAP END JOINTS MINIMUM OF 6" AND STAPLE OVERLAP AT 1.5' INTERVALS. DIRECTION OF SURFACE FLOW STAPLE PATTERN/DENSITY SHALL FOLLOW MANUFACTURERS SPECIFICATIONS OVERLAP LONGITUDINAL JOINTS MINIMUM OF 6" ANCHOR TRENCH 1. DIG 6" X 6" TRENCH 2. LAY BLANKET IN TRENCH 3. STAPLE AT 1.5' INTERVALS 4. BACKFILL WITH NATURAL SOIL AND COMPACT 5. BLANKET LENGTH SHALL NOT EXCEED 100' WITHOUT AN ANCHOR TRENCH 1' TO 3' 6" 6" NOTE: SLOPE SURFACE SHALL BE FREE OF ROCKS, SOIL CLUMPS, STICKS, VEHICLE IMPRINTS, AND GRASS. BLANKETS SHALL HAVE GOOD SOIL CONTACT. EROSION CONTROL BLANKET INSTALLATION ERO-6

7 2" - 5" ( CM) 12" (30 CM) 6" (15 CM) 6" (15 CM) 6" (15 CM) ANCHOR TRENCH FLOW 4" 4" (10 CM) 12" (30 CM) FLOW 6" (15 CM) 4" - 6" (10-15 CM) 6" (15 CM) 6" (15 CM) NOTE: INSTALL 3.5 STAPLES /SY, 1' CENTERS IN CHECK SLOT & ANCHOR TRENCH CHECK SLOT (PER SPECIFICATION) EROSION CONTROL BLANKET CHANNEL INSTALLATION OCT 2009 ERO-7

8 FLOW OF WATERWAY LESS THAN 1/3 THE STREAM/RIVER WIDTH RIVER BANK TEMPORARY ROCK BERM UNDERWATER ANCHOR (TYP. OF FLOTATION SILT CURTAIN) ANCHOR CABLE POINT WHERE FILL MEETS WATER SURFACE 1 BRIDGE ABUTMENT, CULVERT EXT., TEMPORARY FILL OR WORK AREA BUOY (TYP.) RIVER BANK STEEL FENCE POST ANCHOR TO LAND (TYP.) FLOTATION SILT CURTAIN OR SILT FENCE TYPE TB PLAN VIEW NOTE: FT. MAX. SPACING BETWEEN ANCHORS. ANCHOR WEIGHT-MIN. 40 LBS. SEE MNDOT SPECS , 3886, 3887 & 3893 CARRIER FLOAT WATER SURFACE ANCHOR CABLE 1 7 STEEL TENSION CABLE 2 FT. TO 10 FT. CURTAIN DEPTH 1 ANCHOR (ANCHORED TO BOTTOM) BOTTOM FLOTATION SLIT CURTAIN CURTAIN WEIGHT FLOATING SILT CURTAIN MOVING WATER TYPE DEC 2018 ERO-8

9 SILT FENCE OR VEGETATIVE BUFFER ANCHORS IN WATER 45 WATER BODY Y Y 100 FT. TYPICAL 45 1 LESS THAN 1/3 STREAM WIDTH SILT FENCE OR VEGETATIVE BUFFER ANCHOR POINT A BRIDGE ABUTMENT, CULVERT EXTENSION, TEMPORARY FILL, ETC. 1/4 STREAM WIDTH MAX. ANCHOR POINT B TEMPORARY ROCK BERM PLAN VIEW (WORK AREA) NOTES: FT. MAX. SPACING BETWEEN ANCHORS. -ANCHOR WEIGHT - MIN. 40 LBS. CARRIER FLOAT WATER SURFACE STEEL TENSION CABLE 2 FT. TO 10 FT. CURTAIN DEPTH SECTION Y-Y CURTAIN WEIGHT FLOATING SILT CURTAIN STILL WATER ERO-9

10 FILTER ASSEMBLY (OVERFLOW) POLYESTER SLEEVE STRUCTURE COVER ASSEMBLY ISOMETRIC VIEW FILTER ASSEMBLY POLYESTER SLEEVE STRUCTURE COVER ASSEMBLY CATCH BASIN ELEVATION INLET PROTECTION, TYPE A ROAD DRAIN 2x3 TOP SLAB MODEL ERO-10

11 1.71' A A 2.31' 0.28' 0.32' PLAN SLOT FOR LOCKING TAB SECTION A-A SEDIMENT CONTROL BARRIER FRAME 0.18' 0.88' HDPE EMERGENCY OVERFLOW (OPEN ON BOTH SIDES) 1.20' SILT FABRIC SLEEVE PER MNDOT SPECIFICATION " DIAMETER HOLES SEDIMENT CONTROL BARRIER FRAME SECTION INLET PROTECTION, TYPE A INFRASAFE 2x3 TOP SLAB MODEL ERO-11

12 WOODEN LATH SHALL BE NAILED SECURELY TO THE POST MEMBER TO SECURE FILTER FABRIC. 2" X 4" X 2.5' LONG WOOD POSTS, 8 REQ'D. 2" X 4" HORIZONTAL MEMBERS CONTINUOUS AROUND TOP AND BOTTOM. FASTENED TO EACH POST USING 2-20D COMMON NAILS MONOFILAMENT GEOTEXTILE FABRIC AS PER MNDOT TABLE (MS, HI WOVEN GEOTEXTILE.) ADDITIONAL 8-10" OF FABRIC FLAP AT BOTTOM OF BOX 2'-6" 8-10" FABRIC FLAP EXTENDING BEYOND BOTTOM 2"x 4" - BURY UNDER ROCK TO PREVENT UNDERWASHING. 1 1/2" WASHED ROCK 1' DEEP X 1' WIDE NOTES: -CONTRACTOR SHALL CONSTRUCT SILT BOX TO FIT AROUND THE INLET STRUCTURE WITH 6" MINIMUM CLEARANCE TO EDGES OF STRUCTURE. -SILT BOX TO BE PLACED ON AN EVEN SURFACE 6" BELOW STRUCTURE OPENING. -TOP OF SILT BOX TO EXTEND 18" MINIMUM ABOVE EXISTING GRADE. INLET PROTECTION, TYPE B SILT BOX - YARD JAN 2015 ERO-12

13 26 1/2" STEEL RING 1 1/2" WIDE BY 1/8" THICK 25" EXPANDED STEEL 3/4" OPENING, 13 GAUGE 1/2" THREADED ROD WITH J-HOOK HOLDING PROTECTOR TO CASTING SUPPORT STEEL BRACKETS 1" WIDE BY 0.2" THICK STORM DRAIN STEEL RING EXISTING GROUND 27 1/2" ELEVATION ADD 6" OF CLEAR ROCK AROUND BASE OF STRUCTURE STEEL PROTECTOR WRAPPED WITH WOVEN MONOFILAMENT GEOTEXTILE TUCK EXCESS MATERIAL UNDER LOWER RING TO FORM GASKET PRE-MANUFACTURED UNIT BY CIRCLE "H" ENTERPRISES ROTATE J-HOOK TO LOCK PROTECTOR TO CASTING ISOMETRIC VIEW INLET PROTECTION, TYPE B CIRCLE "H" DEC 2018 ERO-13

14 DEVICES TO BE INSTALLED IMMEDIATELY UPON INSTALLATION OF CONCRETE STRUCTURE CONE OR TOP SLAB. CASTING ASSEMBLY MUST ALSO BE AT LEAST TEMPORARILY IN PLACE. DEVICES SHOWN ARE AS MANUFACTURED BY ROYAL ENTERPRISES. MODEL NO. 27" INFRASAFE SEDIMENT CONTROL BARRIER-DG. OVERFLOW OPENING MOLDED POLYETHYLENE GEOTEXTILE FILTER FABRIC PER MnDOT TABLE , (MS, HI WOVEN GEOTEXTILE.) MOLDED RIM MUST SEAT EVENLY ON CATCH BASIN COVER OR FRAME. J-HOOK SHALL BE CONNECTED TO SLOT IN CATCH BASIN CASTING OR STOOL GRATE. INLET PROTECTION, TYPE B INFRASAFE SEDIMENT CONTROL BARRIER JAN 2015 ERO-14

15 DEVICES TO BE INSTALLED IMMEDIATELY UPON INSTALLATION OF CONCRETE STRUCTURE CONE OR TOP SLAB. DEVICES SHOWN ARE AS MANUFACTURED BY WIMCO. MODEL NO. OF UNIT SHOWN: RD 27. POLYESTER SLEEVE FILTER ASSEMBLY WIMCO RD 27 MANHOLE COVER ASSEMBLY 27" CATCH BASIN ISOMETRIC VIEW ELEVATION INLET PROTECTION, TYPE B ERO-15

16 EXISTING CURB OVERFLOW IS 1 2 OF THE CURB BOX HEIGHT PLAN WIMCO ROAD DRAIN CG-23* HIGH FLOW INLET PROTECTION CURB AND GUTTER MODEL OR CITY APPROVED EQUAL. DEFLECTOR PLATE OVERFLOW IS 1/2 OF THE CURB BOX HEIGHT OVERFLOW AT TOP OF FILTER ASSEMBLY CURB FILTER ASSEMBLY DIAMETER, 6" ON-GRADE, 10" AT LOW POINT HIGH-FLOW FABRIC * FOR THE NEW R-3290-VB STANDARD CASTING, INSTALL WIMCO ROAD DRAIN CG-3290 OR CITY APPROVED EQUAL. INLET PROTECTION, TYPE C CATCH BASIN INSERT AFTER PAVING ERO-16

17 CURB INLET BLOCKED WITH SNAKE SAND BAG DEVICES TO BE INSTALLED IMMEDIATELY UPON INSTALLATION OF CASTING ASSEMBLY. DEVICES SHOWN ARE AS MANUFACTURED BY WIMCO. OVERLOW THROUGH CENTER OF FILTER ASSEMBLY 6" FILTER ASSEMBLY CURB POLYESTER FILTER FABRIC WIMCO CG 3250 B WIMCO CG 3250 S INLET PROTECTION, TYPE C WIMCO ERO-17

18 DEVICE SHOWN IS MANUFACTURED BY STORM WATER SOLUTIONS INLET PROTECTION, TYPE C SILT TRAPPER ERO-18

19 6" X 6" TRENCH WITH LEADING EDGE OF TYPE IV GEOTEXTILE FABRIC STAPLED AT 1' INTERVALS AND BACKFILLED WITH NATURAL SOIL MnDOT 3733 GEOTEXTILE FABRIC POINT 1 DITCH CHECK ROCK/BIO WEEPER OR CHECK DAM FLOW FLOW NOTE: POINT 1 MUST BE A MINIMUM OF 6" HIGHER THAN POINT 2 TO ENSURE THAT WATER FLOWS OVER THE DITCH CHECK AND NOT AROUND THE ENDS. POINT 2 ISOMETRIC MIN. 6" OVERLAP IF NECESSARY, STAPLE 1' O.C. 6", 11 GAUGE METAL STAPLES SPACED 2' O.C. HEIGHT WIDTH (INCHES) (INCHES) MATERIAL SMALL CHECK MnDOT 3601 CLASS II RIP RAP LARGE CHECK MnDOT 3601 CLASS III RIP RAP ROCK WEEPER MnDOT 3882 TYPE 9 MULCH (1 1/2" WASHED ROCK) NOTES: 1. DIG 6" X 6" TRENCH 2. LAY BLANKET IN TRENCH 3. STAPLE AT 1.5' INTERVALS 4. BACKFILL WITH NATURAL SOIL AND COMPACT 1' TO 3' 6" 6" MATERIALS (SEE TABLE) WIDTH (SEE TABLE) ANCHOR TRENCH DETAIL >1.5 DIRECTION OF SURFACE FLOW 1 HEIGHT (SEE TABLE) TYPE IV GEOTEXTILE FABRIC ANCHORED IN 6" X 6" TRENCH WITH 6", 11 GAUGE METAL STAPLES AT 1' INTERVALS STAPLE DOWNSTREAM SIDE OF FABRIC AT 2' INTERVALS CHECK DAM SECTION ROCK DITCH CHECK / WEEPER SIZING & MATERIALS ERO-19

20 FLOW BIOROLL STAKE FLOW 45 STAKE 2" x 2" x 16" LONG WOODEN STAKES AT 1'-0" SPACING. STAKES SHALL BE DRIVEN THROUGH THE BACK HALF OF THE FILTER LOG AT AN ANGLE OF 45 WITH THE TOP OF THE STAKE POINTING UPSTREAM. POINT 1 NOTE: POINT 1 MUST BE A MINIMUM OF 6" HIGHER THAN POINT 2 TO ENSURE THAT WATER FLOWS OVER THE DIKE AND NOT AROUND THE ENDS. FLOW POINT 2 COMPOST, STRAW OR WOOD FIBER 12" DIA. ROLL ENCLOSED IN POLYPROPYLENE NETTING OR A GEOTEXTILE BAG. STAKE FILTER LOG DITCH CHECK ERO-20

21 FLOW POINT 1 24" POINT 2 12" TEMPORARY DITCH CHECK: ROCK WEEPER, ROCK CHECK, ROCK LOG OR 12" BIO LOG. OPTIONAL DEPRESSION NOTE: POINT 1 MUST BE MINIMUM OF 6" HIGHER THAN POINT 2, TO ENSURE WATER FLOWS THROUGH AND OVER THE CHECK AND NOT AROUND THE ENDS. PLAN SMALL CHECK ROCK WEEPER HEIGHT (INCHES) WIDTH (INCHES) MATERIAL MNDOT 3601 CLASS II RIP-RAP MNDOT 3882 TYPE 9 MULCH (1 1/2" WASHED ROCK) FLOW TEMPORARY DITCH CHECK OPTIONAL DEPRESSION PROFILE CULVERT/PIPE CULVERT/PIPE PROTECTION ERO-21

22 PUBLIC ROAD 50' MINIMUM LENGTH OR A LENGTH SUFFICIENT TO ALLOW A MIN OF 5 TIRE ROTATIONS ON THE PROVIDED PAD. ROCK-6" MIN. DEPTH, WOOD/MULCH- 12" MIN. DEPTH 1-1/2" TO 3" DIA. WASHED ROCK OR WOOD/MULCH PER SPECIFICATIONS 18" MINIMUM CUT OFF BERM TO MINIMIZE RUNOFF FROM SITE 20' MINIMUM WIDTH NOTES: 1. MnDOT 3733 TYPE 4 FILTER FABRIC SHALL BE PLACED UNDER ROCK OR MULCH TO STOP MUD MIGRATION THROUGH MATERIAL. 2. FUGITIVE ROCK OR MULCH WILL BE REMOVED FROM ADJACENT ROADWAYS DAILY OR MORE FREQUENTLY AS NECESSARY. 3. CONSTRUCTION ENTRANCE MUST BE CONSTRUCTED PRIOR TO THE COMMENCEMENT OF GRADING OPERATIONS ON THE SITE. 4. THE ENTRANCE MUST BE MAINTAINED IN PROPER CONDITION TO PREVENT TRACKING OF MUD OFF THE SITE. THIS MAY REQUIRE PERIODIC TOPDRESSING WITH ADDITIONAL ROCK, WOOD/MULCH, OR REMOVAL AND REINSTALLATION OF THE PAD. 5. THIS ENTRANCE WILL BE USED BY ALL VEHICLES ENTERING OR LEAVING THE PROJECT. 6. THE CONSTRUCTION ENTRANCE WILL BE REMOVED PRIOR TO THE PLACEMENT OF BITUMINOUS SURFACING. CONSTRUCTION ENTRANCE ROCK WOOD / MULCH DEC 2018 ERO-22

23 MIN 2" DIAMETER HIGH TENSILE REINFORCING MEMBERS END SEAM BOTTOM LAYER OF FLEXIBLE FABRIC OR MESH MIN 2" DIAMETER HIGH TENSILE REINFORCING MEMBER SLEEVE SEWN, CLIPPED OR WELDED SEAMS CUT AWAY SECTION UPPER LAYER OF HIGH STRENGTH FLEXIBLE FABRIC OR MESH SEW ENDS OR CLIP SHUT TO CONFINE REINFORCING MEMBERS (NOT SHOWN) OVERLAP FLAP 5.0 M (TYP.) 2.5 M (TYP.) CONNECTING STRAPS PLAN VIEW CONSTRUCTION ENTRANCE AGES MUD MAT ERO-23

24 BERM STABILIZED WITH MnDOT 3885 CATEGORY 3 EROSION CONTROL BLANKET NOTES: STANDPIPE & ROCK BASIN USED FOR 10 ACRE DRAINAGE AREA OR MORE. A DESIGN RUNOFF VOLUME IS FROM A 2-YR, 24-HR STORM PER ACRE C L DRAINAGE WAY DRAINED TO THE BASIN OR 1,800 CUBIC FEET OF LIVE STORAGE PER ACRE DRAINED, WHICHEVER IS GREATER. WHERE PERMITTEES HAVE NOT CALCULATED THE TWO (2)-YEAR, L = VARIABLE 24-HOUR STORM RUNOFF AMOUNT, THE TEMPORARY BASIN MUST PROVIDE 3,600 CUBIC FEET OF LIVE PLAN VIEW STORAGE PER ACRE OF DRAINAGE AREA 6" BELOW 10-YR STORM W 6' MIN. PIPE ANTI-SEEPAGE COLLAR PIPE OUTLET OVERFLOW EMERGENCY OVERFLOW- MnDOT 3601 CLASS II RIPRAP OVER MnDOT 3733 TYPE III GEOTEXTILE FABRIC A INLET STANDPIPE PIPE 3 1 OUTLET- MnDOT 3601CLASS II RIP RAP OVER MnDOT 3733 TYPE III GEOTEXTILE FABRIC ANTI-SEEPAGE COLLAR (TYP.) SECTION A-A MONOFILAMENT GEOTEXTILE FABRIC PER MNDOT TABLE , (MS, HI WOVEN GEOTEXTILE.) EMERGENCY OVERFLOW D = DIAMETER OF STANDPIPE EQUAL TO DIAMETER OF PIPE Z PERFORATED STANDPIPE (RIGID PIPE) 1 2 1"-2" DIAM. ROCK (CONE EQUAL TO 1/3 Z) D 3/4" HOLES SPACED 8" TO 10" ON CENTER 10' MIN. 6' MIN. BASIN STANDPIPE AND EMERGENCY OVERFLOW TEMPORARY SEDIMENTATION BASIN STANDPIPE OUTLET DEC 2018 ERO-24

25 MnDOT 3601 CLASS II RIP RAP A A W C L DRAINAGE WAY W + 2' L = 2W 6' MIN. PLAN VIEW DIRECTION OF SURFACE FLOW 1.5' EMERGENCY OVERFLOW (SEE DETAIL BELOW) 6" D 2 1 MnDOT 3733 TYPE III GEOTEXTILE FABRIC 1% MIN. REVERSE GRADIENT SECTION A-A NOTE: D=2.5' MIN., 5' MAX. W=10' MIN., 25' MAX. W(FT.)= 10 X DRAINAGE AREA (AC.) 1 2 EMERGENCY OVERFLOW 10' MIN. 6' MIN. OVERFLOW DETAIL TEMPORARY SEDIMENT TRAP DEC 2018 ERO-25

26 ANTISEEPAGE COLLAR (TYP.) 2' MIN. DIVERSION MOUND 10" MIN. DIAM. PIPE (AS APPROVED BY THE ENGINEER. SLOPE 3% OR STEEPER 1.5' MIN. FLARED END SECTION WATERTIGHT CONNECTING BAND RIPRAP APRON D NOTE: PIPE SHALL BE ANCHORED SECURELY WITH HOLD-DOWN GROMMETS SPACED 8' ON CENTER 4' LESS THAN 1% SLOPE PROFILE D= PIPE DIAMETER DRAIN AREA (ACRES) PIPE DIAMETER (INCHES) D 3D DIVERSION MOUND PIPE FLOW SLOPE ENSURE FLOW INTO PIPE RIPRAP APRON PLAN MnDOT 3601 CLASS III RIPRAP RIP RAP APRON PLAN DIVERSION MOUND AND TEMPORARY PIPE DOWNDRAIN ERO-26

27 UNDISTURBED VEGETATION SLOPE TRACKED EQUIPMENT TREADS CREATE GROOVES PERPENDICULAR TO SLOPE DIRECTION. NOTE: ALL SLOPES WITH A GRADE EQUAL TO OR STEEPER THAN 3:1 REQUIRE SLOPE TRACKING. SLOPES WITH A GRADE MORE GRADUAL THAN 3:1 REQUIRE SLOPE TRACKING IF THE STABILIZATION METHOD IS EROSION CONTROL BLANKET OR HYDROMULCH. SLOPE TRACKING ERO-27

28 NOTE: 1. SEDIMENT CONTROL BARRIERS TO BE UTILIZED IN CONJUNCTION WITH A STEEL PLATE ON CONSTRUCTION SITES TO TRAP SEDIMENTS, KEEPING MANHOLES & PIPELINES FREE OF DEBRIS. 2. INSTALL TEMPORARY SEDIMENT CONTROL BARRIERS ON ALL NEW AND EXISTING MANHOLES. TOP VIEW FRAME (UNCUT BOTTOM) 23" OR 26" DIAMETER SIDE VIEW VARIES 23" OR 26" DIAMETER VARIES.300 VARIES SEDIMENT CONTROL BARRIER (SCB) UNCUT FRAME FEB 2019 ERO-28