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4.08 STORM DRAIN INLET PROTECTION (ES BMP 1.08) Definition A sediment filter or an excavated impounding area around a storm drain drop inlet or curb inlet. Pur ose To prevent sediment from entering storm water conveyance systems prior to perm anent stabilization of the disturbed area. Condition Where Practice Applies Where storm drain inlets are to be made operational before permanent stabilization of the disturbed drainage area. Different types of structures are applicable to different conditions (see Plates 4.08a through 4.08h). Plannina Considerations Storm sewers which are made operational before their drainage area is stabilized can convey large amounts of sediment to receiving waters. In case of extreme sediment loading, the storm sewer itself may clog and lose most of its capacity. To avoid these problems, It is necessary to prevent sediment from entering the system at the inlets. This section contains several types of inlet filters and traps which have different applications dependent upon site conditions and type of inlet. Other innovative techniques for accomplishing the same purpose are encouraged, but only after specific plans and details are submitted to and approved by the stormwater permitting agency. Note that these various Inlet protection devices are for drainage areas of less than one acre (0.4 ha). Runoff from large disturbed areas should be routed through a TEMPORARY SEDIMENT TRAP - Section 4.25 (ES BMP 1.25). Design Criteria 1. The drainage area shall be no greater than 1 acre (0.4 ha). 2. The inlet protection device shall be constructed to facilitate clean out and disposal of trapped sediment and to minimize interference with construction activities. 3. The inlet protection devices shall be constructed so that any resultant ponding or 2 X 4' VOOD FRAME DROP INLET WITH GRATE T1a FRAEIE Is' MAX IL � �---� r 31 kis I I I I GATHER I. ATCESS CORNERS 1 11 Perspective Views SINCE FABRIC �q II V . I• HDJ. Elevation of Stake and iill( � Fabric Orientaion Detail A speal is Application This method of Inlet protection is applicable where the inlet drains a relatively flat area (slope no greater than 5%) where the inlet sheet or overland flows (not exceeding 1 c.f s.) are typical.The method shall not apply to inlets receiving concentrated flows, such as in street or highway medians. stormwater will not cause excessive inconvenience or damage to adjacent areas or structures. Plate 4.08c Straw Bale and Gravel Drop Inlet Sediment Barrier Source: Erosion Draw Plate 4.08e Filter Fabric Drop Inlet Sediment Filter 4. Design criteria more specific to each particular inlet protection devices will be found Construction Specifications Source: North Carolina Erosion and Sediment Control Manual on Plates 4.08a-h. Gravel and wire mesh drop inlet sediment filter Plate 4.08a Straw Bale Drop Inlet Sediment Filter Source: Michigan Soil Erosion and Sedimentation Control Guil STRAY BALES ARE TO BE PLACED 4 INCHES IN THE SOIL. TIGHTLY ABUTTING VITH NO GAPS, STAKED AND BACKIFILLED AROUND THE ENTIRE OUTSIDE PERIMETER Straw bale drop Inlet filter 1. Wire mesh shall be laid over the drop inlet so that the wire extends a minimum of 1. Bales shall be either wire -bound or string -tied with the bindings oriented around the one foot (30 cm) beyond each side of the inlet structure. Hardware cloth or sides rather than over and under the bales. comparable wire mesh with 112 inch (13 mm) openings shall be used. If more than one strip of mesh is necessary, the strips shall be overlapped at least 1 ft. (30 cm). 2. Bales shall be placed lengthwise in a single row surrounding the inlet, with the ends of adjacent bales pressed together. (See Plate 4.08a) 2. FDOT No. 1 Coarse Aggregate (1.5" to 3.5" stone)(4 - 9 cm) shall be placed over the wire mesh as shown on Plate 4.08c. The depth of stone shall be at least 12 3. The filter barrier shall be entrenched and backfllled. A trench shall be excavated inches (30 cm) over the entire inlet opening. The stone shall extend beyond the around the inlet the width of a bale to a minimum depth of 4 inches (10 cm). After inlet opening at least 18 inches (45 cm) on all sides. (See Plate 4.08f) the bales are staked, the excavated soil shall be backfilled and compacted against the filter barrier. (See Plate 4.08b) 3. If the stone filter becomes clogged with sediment so that it no longer adequately performs its function, the stones must be pulled away from the inlet, cleaned and 4. Each bale shall be securely anchored and held in place by at least two stakes or replaced. rebars (See p. 4-17) driven through the bale. NOTE: This filtering device has no overflow mechanism. Therefore, ponding is likely 5. Loose straw should be wedged between bales to prevent water from entering especially if sediment is not removed regularly. This type of device must never be used between bales. where overflow may endanger an exposed fill slope. Consideration should also be given to the possible effects of ponding on traffic movement, nearby structures, working areas, 6. Gravel may be spread around the bales to improve stability. (See Plate 4.08c) adjacent property, etc. Fabric drop inlet sediment filter 1. Fabric shall be cut from a continuous roll to avoid joints. 2. Stakes shall be 2" x 4" (5 cm x 10 cm) wood (preferred) or equivalent metal with a minimum length of 3 feet (90 cm). (See Plate 4.08d) 3. Staples shall be of heavy duty wire at least 1/2-inch (13 mm) long. A. Stakes shall be spaced around the perimeter of the inlet a maximum of 3 feet (90 cm) apart and securely driven into the ground minimum of 8 inches (20 cm). A frame of 2" x 4" (5 cm x 10 cm) wood shall be constructed around the top of the stakes for proper stability. 5. A trench shall be excavated approximately 4 inches (10 cm) wide and 4 inches (10 cm) deep around the outside perimeter of the stakes. (See Plate 4.08e) 6. The burlap shall be stapled to the wooden stakes, and 8 inches (20 cm)of the fabric shall be extended into the trench. The height of the filter barrier shall be a minimum of 15 inches (38 cm) and shall not exceed 18 inches (45 cm). 7 The trench shall he hackfilled and the snil cmmnarted over the hurlan. _ 1' IN'. o%'•svt'v OVEWLW I it a 4 I FALTERED PATER SECTION AA NOTE: STRAW BALE FILTERS ARE NOT TO BE USED IF ADJACENT AREA TCI INLET IS PAVED Plate 4.08b Straw Bale Filter for Area Inlet Source: HydroDynamics, Inc. ��, INLET PROTECTION NTS SECTION A -A t. DROP INLET 5E12WENT SARRERS ARE TO BE 4. TM TOF OF'11C PRAMS (PONDIN6felo T) f USED "OR SMALL, NEARLY LEVEL DRAINAGE MIST BE HELL BELOW THE 6ROLW mevAnow Ar EAS It.EW THAN SW DOMOLOPE TO PRL•VENT RUNOFF FROM my- 2. USE 294 i'IOOD OR FAUIVALENT METAL 5TAKE5, PASSING THE INLET. A TEMPORARY PIKE MAY (e FT. MIN L1946Ttlj BE NEGESSARY ON TIME DOYtFISL.OPE Site OF S. INSTALL W" NIOOA TOP PRAMS TO INSURE THE .STRUGTURE. 5TAN91I.ITY. Plate 4.08d Silt Fence Drop Inlet Sediment Barrier Source: Erosion Draw -W . ( 4.•. y uv A: a.r 111- " ,111111 A.: - SEDIMENT a' WIRE MESH FILTERED WATER Sneci icApo,ication This method of inlet protection Is'applicable where heavy concentrated flows are expected, but not where ponding around the structure might cause excessive Inconvienee or damage to adiacent structures and unprotected areas. Oraaval shall be VDOT 0, #3571, or Y5 Cows* AgMata Plate 4.08f Gravel and Wire Mesh Drop Inlet Sediment Filter Source: Virginia DSWC Block and aravel drop inlet sediment filter 1. Place concrete blocks lengthwise on their sides in a single row around the perimeter of the inlet, with the ends of adjacent blocks abutting. The height of the barrier can be varied, depending on design needs, by stacking combinations of 4 inch, 8 inch and 12 inch (10, 20, and 30 cm) wide blocks. The barrier of blocks shall beatleast 12 inches (30 cm) high and no greater than 24 inches (60 cm) high. 2. Wire mesh shall be placed over the outside vertical face (webbing) of the concrete blocks to prevent stone from being washed through the holes in the blocks. Hardware cloth or comparable wire mesh with 112 inch (13 mm) openings shall be used. (See Plate 4.08g) 3. Stone shall be piled against the wire to the top of the block barrier. Suitable coarse aggregate shall be used. (See Plate 4.08h) 4. If the stone filter becomes clogged with sediment so that it no longer adequately performs its function, the stone must be pulled away from the blocks, cleaned and replaced. 5. As a very temporary alternative, pervious burlap bags filled with gravel may be placed around the inlet provided that there are no gaps between the bags. (See Plate 4.08i) 6. Either of these two practices may be installed on pavement or bare ground Sod drop inlet sediment filter 1. Soil shall be prepared and sod installed according to the specifications in SODDING Section 6.67 (ES BMP 1.67). 2. Sod shall be placed to form a turf mat covering the soil for a distance of 4 feet (1.2 m) from each side of the inlet structure. (See Plate 4.08j) Prefabricated drop inlet Internal filter bag (ACF Silt Sack) 1. Remove the grate over the catch basin and insert the filter device, then replace grate to hold the device in position. 2. When sediments have accumulated to within one foot (30 cm) of the grate the filter insert must be removed by a front-end loader or forklift. The filter may be discarded and replaced or ft may be emptied, cleaned, and reused. NOTE: This segment does not constitute a product endorsement. DRAIN GRATE r,RAVa- 6A SECTION A - A GONCRL"TE BLOCK CMAVEL BACKFILL (5/4' MIN) MIRE SCREEN OR FILTER FABRIC ONDIN6 HT. NOTES: 5. Ti•E Tot° OF THE STRUCTt112£ &VNDIN6 HetsFIT) I. DROP INLET SEDIMENT SARItlEft ARE TO MUST BE HELL SIRi.OK THE GROUND ELEVATION 9& VOW FOR SMALL, NEARLY LEVEL DRAINAGE DOINNSLOPE TO PREVENT R1#40PF FROM BY - AR AS. (LESS THAN 5%) PASSIN6 THE INLET. A TEMPORARY DIKE MAY Z. EXCAVATE A BASIN OF SUFFICIENT SIZE BE NECESSARY ON THE DOWNSLOPE SIDE OF ADJACENT TO THE DROP INLET. THE STRUCTURE. to 4.08g Block and Gravel Drop Inlet Sediment Filter source: troslon uraw DROP INLET WiTH CRATE �- SEDIMENT SRadic Uollication This method of inlet protection Is applicable where heavy flows are expected and where an overflow capacity;' necessary to prevent excessive pon&g around the structure. Gravel shall be FOOT #% #357, or #S Comm AgWegats. e 4.08h Block and Gravel Drop Inlet Sediment Filter :e; Michigan Soil Erosion and Sedimentation Control Guidebook WAVFL n IM WFKK MM-T r o ewF° � wnz" A t r+ 4 A 3/4-Po+ rF M, mHr IN PEW= RNA DLET Maw r.'A+TE att,rw eAra LR SYN M= FET 5%2 �,y B U74 21 IS$9 VIDE MO E1Y 24 Does LOia 12 II+6iS YIOE 1MID 6 HIES h60i I IF A MALE LATER IF wAvm FX70 BAM Aral LID. ItC 17 WO Bat T£ r..ACEn 9" TINT Fa GAPS om EY WO WA TFE U2M LATER Cr M WE sumro�txr L7+ELSLDJ D• LiRAVEL I [I6tYF1. FlLTEB B94i aN ff A SDOE lit L091E DYER S Tiller olnvEt. f3TEIt B,os ale+ S iFNT rd7 rt�PS ARi EvIDDR CROSS-SECTION AA I SIDE VIEV i CONCRETE BLOCK FILTER I GRAVEL FILTER BAGS RCTEI: GRAVEL FILTERS MAY BE USED ON PAVEMENT OR BARE GROUND Plate 4.081 Gravel Filters for Area Inlets Source: HydroDynamics, Inc. Prefabricated drop inlet external filter (Suntree Isles Grate Inlet Protector) 1. Place the device over the inlet. If the inlet has a grate, the device shall be secured to the grate by means of a long toggle bolt. If the grate is not present, the device shall be bolted directly to the concrete. 2. Sediments shall be removed when they have accumulated to within one foot (30 cm) of the top of the device. The filter fabric elements shall be cleaned or replaced at that time. NOTE: This segment does not constitute a product endorsement. Gravel curb inlet sediment filter 1. Hardware cloth or comparable wire mesh with 1/2 inch (13 mm) openings shall be placed over the curb inlet opening so that at least 12 inches (30 cm) of wire extends across the top of the inlet cover and at least 12 inches (30 cm) of wire extends across the concrete gutter from the inlet opening. (See Plate 4.08k) 2. Stone shall be piled against the wire so as to anchor it against the gutter and inlet cover and to cover the inlet opening completely. FDOT No. 1 Coarse Aggregate shall be used. 3. An overflow weir can be constructed of 2" x 4" (5 x 10 cm) boards to lessen ponding from this practice. (See Plate 4.08L) 4. If the stone filter becomes clogged with sediment so that it no longer adequately performs its function, the stone must be pulled away from the block, cleaned and replaced. Block and gravel curb inlet sediment filter 1. Two concrete blocks shall be placed on their sides abutting the curb at either side of the inlet opening. 2. A 2" x 4" (5 x 10 cm) board shall be cut and placed through the outer holes of each spacer block to help keep the front blocks in place. 3. Concrete blocks shall be placed on their sides across the front of the inlet and abutting the spacer blocks. (See Plate 4.08m) 4. Wire mesh shall be placed over the outside vertical face (webbing) of the concrete blocks to prevent stone from being washed through the holes in the blocks. Hardware cloth with 1/2 inch (13 mm) openings shall be used. 5. FDOT No. 1 Coarse Aggregate shall be piled against the wire to the top of the barrier. Plate 4.081- Gravel Curb Inlet Sediment Filter with Overflow Weir Source: Maryland Standards and Specifications for Soil Erosion and Sediment Control w w 4' .- FOUR 1-FOOT MOE STRIPS OF SOD ON EACH SIDE OF THE DROP INLET RUNOFF WKF R FILTERED wAM w1r4 smlMErrr SPECIFIC APL.UCATiON THIS METHOD OF INLET PROTECTION IS APPPLICABL.E ONLY AT THE TIME OF PERMANENT SEEDING, TO PROTECT THE INLET FROM SEDIMENT AND MULCH MATERIAL UNTIL PERMANENT VEGETATION HAS BECOME ESTABLISHED. Plate 4.08j Sod Drop Inlet Sediment Filter Source: Virginia DSWC r GRAVEL Fl LT ER t zl RUNOFF WATER WIRE MESH FILTERED WATER I A.- __ 'IC •p W - *` s. IT SEDIMENT CONCRETE GUTTER 12 CURB INLET Specific ApDlication This method of inlet protection is applicable at curb inlets where ponding in front of the structure is not likely to cause Inconvenience or damage to adjacent structures and unprotected ares. Gravel Shall be VDOT #3, #367, or #5 Coarse Aggregate. Plate 4.08k Gravel Curb Inlet Sediment Filter Source: Virginia DSWC. ~1�fi~=,►ass_ • Perspective View ,/� �`- T' x 4* WEIR Z X 4' SPAM SAND SING OR r MINIMUM LENGTH ALTERNATE WEIGHT orVx4' Y x r WEIR GRAVEL Side Elevation ' 1• x •t• SPACER WIRE MEA4 ' ::.::�,: '• INLET SPECIFIC APPLICATION TO PIPE THIS METHOD OF INLET PROTECTION IS APPLICABLE TO CURB INLETS WHERE A STURDY, COMPACT INSTALLATION IS DESIRED. EMERGENCY OVERFLOW CAPABILITIES ARE MINIMAL.. SO EXPECT SIGNIFICANT PONDING WITH THIS MEASU RE - GRAVEL SHALL BE VDOT COARSE AGGREGATE Jp3,. #357 OR #5 �- SACK OF SIPEAALK A CATCH SA5IN �- SACK OF CURB CURB tNLt:T 2X4 WOOD STUD CONCRETE BLOCK KIM t SCREEN`� L A OR GONGRLTE BLocK 3/4• 0 MAIN GRAVEL PLAN VIEW BR PONDIN6 MISHT ter^ CONCRETE BLOT •VE:RFLOri t CURB INLET MURE SCREEN OR � I � Fn-TLR FABRIC 2X4 }HOOD STUD CATCH BASIN / SECTION A - A - NOTES- 2. BARRIER SHALL ALLOW FOR OVERFLOW 1. USE BLOCK AND 6RAVEL TYPE SEDIMENT FROM 515E STORM END R 3. AND REMOVE SEDIMETLT BARRIER WHEN CURB INLET 15 LOCATED IN AFTER EACH STORM EVENT. SEDIk1tNT AND TEREINSPECT i4 STORM ISENTLY SLOPING STREET S)=6M1ENT, V+!lI GRAVEL. MUST Be REMOVED PROM THE YNATER GAN POND AND ALLOW SEDIMENT TO TRAVEL.=D WAY 1MMWIATELY. SEPARATE FROM R!)NOPF. e 4.08m Block and Gravel Curb Inlet Sediment Barrier m: Erosion Draw LEAYE eE mAvYEL• FFIILIER IILmLS PriVOiT WVB. FILTER V PF0&AiFLY AV IINW tp 3/4-M DINVERI PIJCW ill MNE1£Nr !F ridAVEt T[A ff 0?d>ElE a 97tS I a is TO ENVE A TNo FOPS 7ELY A 5 M S FICK BEET O A RICE tiRAVTf FILTER Dr"rm ARE EL3 I GGWS ME Ev1�DEW cu'aae ama 3i4-D431 twiM CWAI ED IN PERVFIS s RL* a+rs OR 7*4111c IC NET EACS *VIIIIIIIIILn p n VI M6 VCHM pES I va OVEsstD1 r><4 UMSiIII PAVEMENT CONCRETE WALK RIOT �► I _ r OF MOEL FILTER EWr BE AM e GSREM TGRA�AI NO FILTERED RI I CDCXW VALK r#PS ARE EVIMW CROSS-SECTION AA ( FRONT VIEW CONCRETE BLECK FILTER l GRAVEL FILTER BAGS ROTE: GRAVEL FILTERS CAN BE USED ON PAVEMENT DR BARE GROUND Plate 4.08n Curb Inlet Gravel Filters Source: HydroDynamics, Inc. ingefflium PLANNING & ENGINEERING 14499 N DALE MABRY HWY 5UITE 250 TAMPA, FL 33618 813.387.0084 „ No' 60386 A � N A% STATE OF FLORIDA AUTHORIZATION NUMBER 8370 PLAN5 PREPARED BY INGENIUM ENTERPRISES FORMERLY GRIMAIL CRAWFORD 0 N a CL CLIENT: MCCON BUILDING CORP. 105q CIRCLE DRIVE HIGHLAND, WI 53543 PHONE: 608.g2q.7737 REV15ION W15TORT ----/--/---- ----/--/---- ----/--/---- -- --/--/---- ----/--/---- ----/--/---- ----/--/---- -- --/--/---- ----/--/---- -- THE CIVIL ENGINEER REGULARLY UPDATE5 ELECTRONIC FILE5 DURING THE DEVELOPMENT OF A PROJECT. AS A RE5ULT, THE DATA INCLUDED IN ANY CAD FILE OR DRAWING PRIOR TO IT5 FINAL RELEA5E DOE5 NOT NECESSARILY REFLECT THE COMPLETE SCOPE OR CONTENT A5 DEFINED IN THE CONTRACT. THE CONTENTS IN THESE FILF5 MAY THEREFORE BE PRELIMINARY, INCOMPLETE WORK IN PROGRE55, AND SUBJECT TO CHANGE. FURTHERMORE, THE INFORMATION CONTAINED HEREIN 15 THE EXCLU51VE PROPERTY OF THE CIVIL ENGINEER. THE ORIGINAL IDEA5 REPRE5FNTED HERE BY TH15 INFORMATION SHALL NOT BE USED, ALTERED, OR REPRODUCED IN ANY MANNER WITHOUT THE EXPRESSED WRITTEN CONTENT OF THE CIVIL ENGINEER. THE5E PLANS ARE SUBJECT TO FEDERAL COPYRIGHT LA145; ANY 115E OF SAME WITHOUT EXPRESSED WRITTEN PERM155ION OF THE CIVIL ENGINEER 15 PROHIBITED. PROJ # 170061 DWG NAME 170%1 C06.DWG 155UE DATE Oq/07/2017 PROJ MGR JP ESK DETAILS III C06.6 SHEET NUMBER i H, .i ml-::