IN T R A / M IN T R A M

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1 SPRING MESA SUBDIVISION CONSTRUCTION PLANS A PART OF SECTION 35, TOWNSHIP 2 SOUTH, RANGELINE 70 WEST, 6th. PRINCIPAL MERIDIAN. CITY OF ARVADA, COUNTY OF JEFFERSON, STATE OF COLORADO COVER SHEET MARTIN / MARTIN

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4 24.0" 10.0" OR 4.0" 24.0" FABRIC MATERIAL (ANCHORED IN TRENCH) POST ANCHORED TO FABRIC MARTIN / MARTIN 3/4-inch gravel 3/4-inch gravel 10.0" 1/4-inch mesh or burlap 4.0" 1/4-inch mesh or burlap 4"x4" TRENCH BACKFILL FLOW PLAN VIEW DETAIL 1 1/2H (12" MIN) 30 SILT FENCE INSTALLATION SECTION -NTS- -NTS- FLOW CURB FACE VARIES SEE NOTE 2 BELOW DETAIL 2 INLET 1) SOCKS WILL BE USED UPGRADIENT OF INLET PERPENDICULAR TO AND FLUSH WITH CURB. 2) NO LESS THAN TWO 10-INCH DIAMETER SOCKS MUST BE USED IN SEQUENCE, SPACED NO MORE THAN FIVE FEET APART, UPGRADIENT OF INLET. NO LESS THAN SIX SOCKS SHALL BE USED IF THE 4-INCH SOCK IS USED, ALSO SPACED AT NO MORE THAN 5 FEET APART. 1. SILT FENCE SHALL BE CONSTRUCTED BEFORE ANY UPSLOPE OR LAND DISTURBANCE BEGINS. 2. ALL SILT FENCE SHALL BE PLACED AS CLOSE TO THE CONTOUR AS POSSIBLE SO THAT WATER WILL NOT CONCENTRATE AT LOW POINTS IN THE FENCE AND SO THAT SMALL SWALES OR DEPRESSIONS WHICH MAY CARRY SMALL CONCENTRATED FLOWS TO THE SILT FENCE ARE DISSIPATED ALONG ITS LENGTH. 3. TO PREVENT WATER PONDED BY THE SILT FENCE FROM FLOWING AROUND THE ENDS, EACH END SHALL BE CONSTRUCTED UPSLOPE SO THAT THE ENDS ARE AT A HIGHER ELEVATION. 4. WHERE POSSIBLE, SILT FENCE SHALL BE PLACED ON THE FLATTEST AREA. 5. MAINTENANCE - SILT FENCE SHALL ALLOW RUNOFF TO PASS ONLY AS DIFFUSE FLOW THROUGH THE FBRIC MATERIAL. IF RUNOFF OVERTOPS THE SILT FENCE, FLOWS UNDER OR AROUND THE ENDS, OR IN ANY OTHER WAY BECOMES A CONCENTRATED FLOW, ONE OF THE FOLLOWING SHALL BE PERFORMED, AS APPROPRIATE: 1) THE LAYOUT OF THE SILT FENCE SHALL BE CHANGED, 2) ACCUMULATED SEDIMENT SHALL BE REMOVED, OR 3) OTHER PRACTICES SHALL BE INSTALLED AS DIRECTED. 6. EROSION CONTROL MEASURES SHALL BE MAINTAINED AT ALL TIMES UNTIL LANDSCAPING IS COMPLETED, AND AS DIRECTED BY THE CITY OF ARVADA INSPECTOR. DIRECTION OF RUNOFF WATERS -NTS- PLACE THE END POST OF THE SECOND FENCE INSIDE THE END POST OF THE FIRST FENCE ROTATE BOTH POSTS AT LEAST 180 DEGREES IN A CLOCKWISE DIRECTION TO CREATE A TIGHT SEAL WITH THE FABRIC MATERIAL DRIVE BOTH POSTS ABOUT 10 INCHES INTO THE GROUND AND BURY FLAP SILT FENCE REPAIR & JOINING SECTION 1. THE STRAW WATTLE CONTAINS AGRICULTURAL STRAW FOR THE PURPOSE OF SLOWING WATER VELOCITY AND TRAPPING SEDIMENTATION. 2. THIS WORK SHALL CONSIST OF FURNISHING AND INSTALLING THE STRAW WATTLE, INCLUDING FINE GRADING, INSTALLING, STAKING, AND MISCELLANEOUS RELATED WORK, IN ACCORDANCE WITH STANDARD SPECIFICATIONS AND AT THE LOCATIONS IDENTIFIED ON DRAWINGS OR DESIGNATED BY THE CITY OF ARVADA INSPECTOR. THIS WORK SHALL INCLUDE ALL NECESSARY MATERIALS, LABOR, SUPERVISION, AND EQUIPMENT FOR INSTALLATION OF THE COMPLETE SYSTEM. 3. THE STRAW WATTLE SHALL BE USED TO SLOW WATER VELOCITY, TRAP SEDIMENT, AND ENHANCE REVEGETATION. BASED ON A PROJECT-BY-PROJECT ANALYSIS THE CITY OF ARVADA INSPECTOR MAY DEEM THE STRAW WATTLE SUITABLE FOR THE FOLLOWING APPLICATIONS. A) SLOPE INTERRUPTION B) CHANNELS, SWALES, AND DITCHES C) INLET AND OUTLET PROTECTION (DISTURBED AREAS ONLY) D) AREA CONTAINMENT 4. EROSION CONTROL MEASURES SHALL BE MAINTAINED AT ALL TIMES AND AS DIRECTED BY THE CITY OF ARVADA INSPECTIONS AND INCLUDE: 1) REMOVAL OF ACCUMULATED MATERIAL FROM UPSTREAM SIDE, AND OR 2) SILT NOT TO EXCEED 50% CAPACITY OF THE WATTLE. 3) INCLINE AT 30 DEGREES FROM PERPENDICULAR, OPPOSITE THE DIRECTION OF FLOW (SEE DETAIL 2). 4) EROSION CONTROL MEASURES SHALL BE MAINTAINED AT ALL TIMES AND AS DIRECTED BY THE CITY OF ARVADA INSPECTOR. CURB SOCK SILT FENCE STRAW WATTLE EROSION CONTROL BLANKET CONTINUED ROLL WIDTH "W" (TYP.) UNDISTURBED SOIL PERIMETER ANCHOR TRENCH, TYP. JOINT ANCHOR TRENCH, TYP. TOP OF CHANNEL BANK ANCHOR DETAILS EROSION CONTROL BLANKET (TYP.) 3" MIN. (TYP.) PERIMETER ANCHOR TRENCH OR JOINT ANCHOR TRENCH, TYP. 1/2 "W" 6" MIN. (TYP.) SINGLE EDGE STAKE (TYP.) STRAW STRAW-COCONUT COCONUT OR EXCELSIOR TYPE OF BLANKET AS INDICATED IN PLAN VIEW, IN ALL DISTURBED AREAS OF STREAMS AND DRAINAGE CHANNELS TO DEPTH "D" ABOVE CHANNEL INVERT. BLANKET SHALL GENERALLY BE ORIENTED PARALLEL TO FLOW DIRECTION. STAKING PATTERN SHALL MATCH BLANKET TYPE. AT PIPE OUTLET AREAS OF STREAMS AND DRAINAGE CHANNELS - DETAIL A PER MANUFACTURER SPEC. OR TYPE 2 OR 3 STAKING (MATCH SPECIFIED BLANKET TYPE) SEE THE STAKING PATTERNS DETAIL ON NEXT SHEET "M" TYPE OF BLANKET, INDICATED IN PLAN VIEW THE BLANKET SHALL BE EXTENDED TO THE TOP OF CHANNEL BACKFILL (TYP.) PERIMETER ANCHOR TRENCH TWO EDGES OF TWO ADJACENT ROLLS JOINT ANCHOR TRENCH EROSION CONTROL BLANKET INSTALLATION NOTES STAKING PATTERNS SHALL BE IN ACCORDANCE WITH MANUFACTURER'S SPECIFICATION. IF NO MANUFACTURER'S SPECIFICATION IS AVAILABLE USE THE ACCEPTABLE STAKING PATTERN (AS SHOWN ABOVE) 1. SEE PLAN VIEW FOR: - LOCATION OF PERIMETER OF EROSION CONTROL BLANKET. - TYPE OF BLANKET (STRAW, STRAW-COCONUT, COCONUT, OR EXCELSIOR). - AREA "A" IN SQUARE YARDS OF EACH TYPE OF BLANKET. 2. ALL EROSION CONTROL BLANKETS AND NETTING SHALL BE MADE OF 100% NATURAL AND BIODEGRADABLE MATERIAL; NO PLASTIC OR OTHER SYNTHETIC MATERIAL, EVEN IF PHOTO DEGRADABLE, SHALL BE ALLOWED. 3. IN AREAS WHERE EROSION CONTROL BLANKET IS SHOWN ON THE PLANS, THE PERMITTEE SHALL PLACE TOPSOIL AND PERFORM FINAL GRADING, SURFACE PREPARATION, AND SEEDING BELOW THE SEEDING AND MULCHING. SUBGRADE SHALL BE SMOOTH AND MOIST PRIOR TO BLANKET INSTALLATION AND THE BLANKET SHALL BE IN FULL CONTACT WITH SUBGRADE, NO GAPS OR VOIDS SHALL EXIST UNDER THE BLANKET. INSTALL ROCK FLUSH WITH OR BELOW TOP OF PAVEMENT SUBGRADE NON-WOVEN GEOFABRIC 1. ALL ROCK, OR RECYCLED CONCRETE WILL BE REMOVED UPON COMPLETION OF CONSTRUCTION. CDOT SECT. #703, AASHTO #3 COARSE AGGREGATE OR 6" (MINUS) ROCK, OR RECYCLED CONRETE = 6" (MINUS) ROCK 2. ALL PUBLIC ROADWAYS, CURB AND GUTTER, AND SIDEWALK WILL BE KEPT CLEAN AND FREE OF MUD, DIRT AND DEBRIS AT ALL TIMES. 3. EROSION CONTROL MEASURES SHALL BE MAINTAINED AT ALL TIMES AND AS DIRECTED BY THE CITY OF ARVADA INSPECTOR. >3 1 SUBGRADE PERIMETER ANCHOR TRENCH, TYP. JOINT ANCHOR TRENCH, TYP. IN DIVERSION DITCH OR SMALL DITCH DRAINAGE WAY - DETAIL B DIVERSION DITCH TYPICALLY AT TOP OF SLOPE BLANKET SHALL BE 100% STRAW MIN. PERIMETER ANCHOR TRENCH SEE DETAIL ON THIS SHEET STAGGER OVERLAPS OVERLAPPING JOINT, SEE DETAIL ON THIS SHEET PER MANUFACTURER SPEC. OR TYPE 1 STAKING SEE THE STAKING PATTERN DETAIL ON NEXT SHEET OUTSIDE OF STREAMS AND DRAINAGE CHANNELS - DETAIL C FLOW 6" OVERLAPPING JOINT LOOP FROM MIDDLE OF ROLL 3" MIN. WOOD STAKE DETAIL MINIMUM THICKNESS 1" USE 2x4 MATERIAL FOR STAKES 4. PERIMETER ANCHOR TRENCH SHALL BE USED AT OUTSIDE PERIMETER OF ALL BLANKET AREAS. 5. JOINT ANCHOR TRENCH SHALL BE USED TO JOIN ROLLS OF BLANKETS TOGETHER (LONGITUDINALLY AND TRANSVERSELY) FOR ALL BLANKETS EXCEPT STRAW, WHICH MAY USE AN OVERLAPPING JOINT. 6. INTERMEDIATE ANCHOR TRENCH SHALL BE USED AT SPACING OF ONE-HALF THE ROLL LENGTH FOR COCONUT AND EXCELSIOR BLANKETS. 7. THE OVERLAPPING JOINT DETAIL SHALL BE USED TO JOIN ROLLS OF BLANKETS TOGETHER FOR BLANKETS ON SLOPES. 8. MATERIAL SPECIFICATIONS OF EROSION CONTROL BLANKET SHALL CONFORM TO TABLE ANY AREAS OF SEEDING AND MULCHING DISTURBED IN THE PROCESS OF INSTALLING EROSION CONTROL BLANKET SHALL BE RESEEDED AND MULCHED. 10. DETAILS ON DESIGN PLANS FOR MAJOR DRAINAGEWAY STABILIZATION WILL GOVERN IF DIFFERENT FROM ONES SHOWN HERE TYPE EROSION CONTROL BLANKET MAINTENANCE NOTES TABLE EROSION CONTROL BLANKET TYPE COCONUT CONTENT STRAW CONTENT EXCELSIOR CONTENT NETTING MIN. STRAW* - 100% - DOUBLE/NATURAL STRAW-COCONUT 30% MIN. 70% MAX. - DOUBLE/NATURAL COCONUT 100% - - DOUBLE/NATURAL EXCELSIOR % DOUBLE/NATURAL * FOR OUTSIDE OF STREAMS AND DRAINAGE CHANNELS 1. THE CONTRACTOR SHALL INSPECT EROSION CONTROL BLANKETS WEEKLY, DURING AND AFTER ANY STORM EVENT AND MAKE REPAIRS AS NECESSARY, OR AS DIRECTED BY THE CITY OF ARVADA INSPECTOR. 2. EROSION CONTROL BLANKET IS TO BE LEFT IN PLACE UNLESS REQUESTED TO BE REMOVED BY THE CITY OF ARVADA INSPECTOR. 3. ANY EROSION CONTROL BLANKET PULLED OUT, TORN, OR OTHERWISE DAMAGED SHALL BE RE-INSTALLED. ANY SUBGRADE AREAS BELOW THE BLANKET THAT HAVE ERODED TO CREATE A VOID UNDER THE BLANKET, OR THAT REMAIN DEVOID OF GRASS SHALL BE REPAIRED, RESEEDED AND MULCHED AND THE EROSION CONTROL BLANKET REINSTALLED. 4. EROSION CONTROL MEASURES SHALL BE MAINTAINED AT ALL TIMES AND AS DIRECTED BY THE CITY OF ARVADA INSPECTOR. VEHICLE TRACKING CONTROL EROSION CONTROL BLANKET EROSION CONTROL BLANKET (CONTINUED)

5 AREA INLET (TYPE C SHOWN) INLET PROTECTION CONTINUED SEE JOINT DETAIL, THIS SHEET IP MARTIN / MARTIN A REINFORCED ROCK BERM SEE SB DETAIL AREA INLET - PLAN 1-1/2" CRUSHED ROCK ENCLOSED IN WIRE MESH 10' MIN. ANY GAP AT JOINT SHALL BE FILLED WITH 1 1/2" CRUSHED ROCK AND WRAPPED WITH ADDITIONAL WIRE MESH SECURED TO ENDS OF ROCK REINFORCED BERM 12" 12" FILTERED RUNOFF 2" IN SOIL 0" ON PAVEMENT AREA INLET SECTION A ROCK FILTER JOINT DETAIL INLET PROTECTION INSTALLATION NOTES 1. INLET PROTECTION AFTER INLET CONSTRUCTION OF AFTER PAVEMENT SHALL BE INSTALLED WITHIN 48 HOUR AFTER INLET CONSTRUCTION OR PAVING IS COMPLETED. 2. CRUSHED ROCK SHALL BE FRACTURED FACE (ALL SIDES) AND SHALL COMPLY WITH GRADATION SHOWN IN CDOT SECT , #4 aggregate (1-1/2" MINUS). RECYCLED CONCRETE MEETING THIS GRADATION MAY BE USED. 3. WIRE MESH SHALL BE FABRICATED OF 10 GAUGE WIRE TWISTED INTO A MESH WITH A MAXIMUM OPENING OF 1.0 INCH (COMMONLY TERMED "CHICKEN WIRE"). ROLL WIDTH SHALL BE 48-INCHES. 4. WIRE MESH SHALL BE SECURED USING "HOG RINGS" OR WIRE TIES AT 6-INCH CENTERS ALONG ALL JOINTS AND AT 2-INCH CENTERS ON ENDS OF BERM. 5. REINFORCED ROCK BERM SHALL BE CONSTRUCTED IN ONE PIECE OR SHALL BE CONSTRUCTED USING JOINT DETAIL. INLET PROTECTION MAINTENANCE NOTES 1. THE SWMP MANAGER SHALL INSPECT INLET PROTECTION WEEKLY, DURING AND AFTER ANY STORM EVENT AND MAKE REPAIRS OR CLEAN OUT AS NECESSARY. INSPECT MORE FREQUENTLY DURING WINTER CONDITIONS DUE TO FREEZE/THAW PROBLEMS. REPAIRS AS NEEDED. 2. SEDIMENT ACCUMULATED UPSTREAM OF INLET PROTECTION SHALL BE REMOVED WHEN THE SEDIMENT DEPTH UPSTREAM OF ROCK BERM IS WITHIN 2-1/2 INCHES OF THE CREST. 3. INLET PROTECTION IS TO REMAIN IN PLACE UNTIL THE UPSTREAM DISTURBED AREA IS STABILIZED AND GRASS COVER IS APPROVED, UNLESS THE LOCAL JURISDICTION APPROVES EARLIER REMOVAL OF INLET PROTECTION IN STREETS. 4. WHEN INLET PROTECTION AT AREA INLETS OTHERWISE STABILIZED IN A MANNER APPROVED BY THE LOCAL JURISDICTION. IS REMOVED, THE DISTURBED AREA SHALL BE COVERED WITH TOP SOIL, DRILL SEEDED AND CRIMP MULCHED, OR DETAIL BASED ON DETAILS PROVIDED BY DOUGLAS COUNTY Urban Drainage and Flood Control District Drainage Criteria Manual (V.3) Figure C5-21 INLET PROTECTION - AREA INLET IN SUMP

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7 3" (typ) 24" Concrete Footing