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HomeMy WebLinkAbout19960533 Ver 1_Complete File_19960604State of North Carolina Department of Environment, Health and Natural Resources AT.K;TA 0 Division of Environmental Management James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary p F= H N R A. Preston Howard, Jr., P.E., Director June 8, 1996 Clay County DEM Project # 960533 APPROVAL of 401 Water Quality Certification Mr. W. Trent Anderson N.C. Dept. of Transportation P.O. Box 1551 Andrews, NC 28901 Dear Mr. Anderson: You have our approval to place fill material in 0.032 acres of wetlands or waters for the purpose of improving and upgrading SR 1171, as you described in your application dated 28 May 1996. After reviewing your application, we have decided that this fill is covered by General Water Quality Certification Number 2671. This certification allows you to use Nationwide Permit Number 26 when it is issued by the Corps of Engineers. This approval is only valid for the purpose and design that you described in your application. If you change your project, you must notify us and you may be required to send us a new application. For this approval to be valid, you must follow the conditions listed in the attached certification. In addition, you should get any other federal, state or local permits before you go ahead with your project. If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written petition which conforms to Chapter 150B of the North Carolina General Statutes to the Office of Administrative Hearings, P.O. Box 27447, Raleigh, N.C. 276 1 1-7447. This certification and its conditions are final and binding unless you ask for a hearing. This letter completes the review of the Division of Environmental Management under Section 401 of the Clean Water Act. If you have any questions, please telephone John Dorney at 919-733- 1786. Sincerely, Attachment cc: Wilmington District Corps of Engineers Corps of Engineers Asheville Field Office Asheville DEM Regional Office Mr. John Dorney Central Files I7 U7 P ston 1IoW d, Jr. P.E. 960533.1tr Environmental Sciences Branch, 4401 Reedy Creek Rd., Raleigh, NC 27607 Telephone 919-733-1786 FAX # 733-9959 An Equal Opportunity Affirmative Action Employer 9 50% recycled/10% post consumer paper ,??l? lSSI)F.? .6053??: C STATE OF NORTH CAROLINA DEPARTMENT OF TRANSPORTATION JAMES B. HUNT 1R. GOVERNOR CLAY COUNTY SR 1171 Mr. Bob Johnson US Army Corps of Engineers Regulatory Field Office Rm. 75, Grove Arcade Building 37 Battery Park Avenue Asheville, NC 28801-2714 Dear Mr. Johnson: DIVISION OF HIGHWAYS P.O. Box 1551 Andrews, N.C. 28901 May 28, 1996 GARLAN I) B. GARRETL J R. SECRE: FARY The North Carolina Department of Transportation (NCDOT) is proposing to grade, drain, base, and pave SR 1171, Dick Jones Road, primarily along the existing roadway. Inn order to construct this project in accordance with our current secondary road standards and due to the proximity of trout streams (Thumping Creek, Dave Barrett Creek, Eagle Fork Creek, and tributaries, DEM Class C - Trout Water) and replacement of pipe culverts, we are requesting authorization under Section 404 of the Clean Water Act. I am sending a straight-Tune diagram with the proposed erosion control, stream, stream bank, and construction limits at various sites along the project where we will be in coiillict with the streams. In addition, I am sending a typical section of the road, cross-sections, drawings lbr pipe culvert replacements, general notes and standards on some erosion control measures, and a marked map. We propose to install the new culverts slightly below the existing streambed elevations where bedrock is not encountered to minimize impacts to wildlife habitats and allow (lie existing stream gradients to remain as unchanged as is physically possible. The best management practices will be used to minimize and control sedimentation and erosion on this project. The construction foreman will review all erosion control measures daily to ensure sedimentation and erosion are being effectively controlled. If the planned devices are not functioning as intended, they will immediately be replaced with better devices. The rock silt screens and other erosion control devices will be in place prior to pipe culvert construction and will remain in place until the project is stabilized. ?•J Mr. Bob Johnson Page 2 May 28, 1996 By copy of this letter, I am asking 1VU•. David Yow, North Carolina Wildlife Resources Commission (NCWRC) District 9 Environmental Coordinator, to comment directly to you concerning the 404 Nationwide Permit request. A request will be made on this project for a temporary encroachment in the Trout Water Buffer Zone of Eagle Fork Creek and I am asking Mr. Yow and Mr. Ed L. Ingle, Area Ioadside Environmental Engineer (NCDOT) to comment directly to me concerning the Trout Water Bulrer Zone Encroachment. Also, by copy of this letter, 1 am requesting authorization to proceed under Seclion 401 of the Clean Water Act from the Division of Enviromnental Management. We would like to begin construction as soon as possible. If further information is required, please call me at (704) 321-4105. Your early review and consideration will be greatly, appreciated. Sincerely, 01 W. 'Trent Anderson County Maintenance Engineer WTA/lk Attachments cc: Mr. Richard Phillips, P.E., Regional Engineer DEHNR Mr. F.D. Martin, P.E., Division Engineer Mr. E.L. Ingle, Area Roadside Environmental Engineer Mr. J.B. Setzer, P.E., District Engineer Mr. Eric Galamb, Water Quality Certification Unit, DENT Mr. David Yow, District 9 Environmental Coordinator, NCWRC i :DEM ID: AC'T'ION ID: ~ Nationwide Permit Requested (Provide Nationwide Permit #): 2 JOINT FORM FOR Nation wide permits that require notification to the Corps of Engineers Nation*lde permits that require application for Section 401 certification WILMINGTON DISTRkT ENGINEER WATER QUALITY PLANNING CORPS OF ENGINEERS DIVISION OF ENVIRONMENTAL MANAGEMENT DEPARTMENT OF THE ARMY NC DEPARTMENT OF ENVIRONMENT, HEALTH, P.O. Box 1890 AND NATURAL RESOURCES Wilmington, NC 28402.1890 P.O. Boy 29535 ,AM: CESAW-CO-E '1 Raleigh, NC 27626-0535 1 ,Telephone (919) 251-0511 ATTN: MR.1OHN DORNEY Telephone (919) 733-5083 ONE (1) COPY OF THIS COMPLETED APPLICATION SHOULD BE SENT TO THE CORPS OF ENGINEERS.. SEVEN (7) COPIES SHOULD BE SENT TO THE N.C. DIVISION OF ENVIRONMENTAL MANAGEMENT. PLEASE PRINT (1 1. Owners Name: tA0AH comkn0. DeQar??e?`? of ?fahsQo ?IOVL 2. Owners Address: P 0. go I S S l A rXJ re_w S. t?lG Z 8 9 0 l 3. Owners Phone Number (Home): (Work): (,70 4) 32 I -- 410 5 4. If `ApQlieabit Agent's name or responsible corporate official, address, phone number: W . -A'Cent Andefsom i f 5. Location of work (MUST ATTACH MAP). County: C 4y - Nearest Town or City:,- Specific Location (Include road numbers, landmarks, etc.): F-aq Ie Fork. Creek t ?f4.Umo ir?a Creek Dave F?arcmk 6. Name of Closest Stream/River: 7. River Basin: ti 1 W See, R i ve r $as ire. 8. Is this project located in a Watershed classified as rou SA, HQW, ORW, WS I, or WS II? YES P4 NO I ] 9, Have any Section 404 permits been previously requested for use on this property? YES I ] NO K If yes, explain. 10. Estimated total number of acres of waters of the U.S., including wetlands, located on project site: 11. Number of acres of waters of the U.S., including wetlands, impacted by the proposed project: Filled: ? , ??? ac,!'e a?. S?,t?pr?1 CruSSt nqS Drained: Flooded: Excavated: Total Impacted: ?' 032 Ac-re 12. Description of proposed work (Attach PLANS-8 1/2" X 11" drawings only); -1-b w?deyx 'avxA peve SR 11-71 Ab rneei Curre- ,+, NC-DO-f" S4-cv 0rJS• l3. Purpose of proposed work: SGm?°- . 14. State reasons why the applicant believes that this activity must be carried out in wetlands, 4klso? note measures taken to minimize wetland impacts. ?J/Ac 15. You are required to contact the U.S. Fish and Wildlife Service (USFWS) and/or National Marine Fisheries Service (NMFS) regarding the presence or any Federally listed or proposed for listing endangered or threatened ies or critical habitat in the permit area that may be affected by the proposed project. Have you done sod Yi? ] 1?Ip [, J RESPONSES FROM THE USFWS AND/OR NMFS SHOULD BE FORWARDED TO CORPS. Opp 1` 16. You are required to contact the State Historic Preservation Officer (SHPO) regarding the p?sence of historic' properties in the permit area which may be affected by the proposed project? Have you done so? YES V 1 IN [ 1 RESPONSE FROM THE SHPO SHOULD BE FORWARDED TO CORPS. i w ?` ?.h Qep i C.;dUoru 17. Additional information required by DEMt A. Wetland delineation map showing all wetlands, streams, and lakes on the property, •' ; IP B. If available, representative photograph of wetlands to be impacted by project. C. If delineation was performed by a consultant, include all data sheets relevant to the placement of the,., delineation line. D. If a stormwater management plan is required for thiytat-w%looA roject, attach copy. r E. What is land use of surrounding property? Rura\ a4 wcoA 6J. ReSjdenG CL F. If applicable, whbt is proposed method of sewage disposal? to A . ?'?°~ ,??.?, Mo 28 19110 Owner's Signature Date ?c IA1?,p? wrrr r.......r...r....o...r.r..,..., .k . , ...,..., ?_... _ ........... l #AS e) ,5 1 N Z 7C7 1 `? ?' ? ? Y s'? _ ? I??4f4/111y r e] ,0. 44 ! h? i f :I ? erss' 'r 4 ? 83 30 I i j S , I 9 ;. I 10 / ? nn U1 q - o Z kp ? v S • .v P tr I?rfl,r, A -? ? ? 4bf -Ohm ,. CLAY ! nneD DICK JONES ROAD NANIF SA..a 6.922072 W.O. ' SR 1169 000 to 52+80 F O 1' SR-1169 AluJl'1aOH_ --- ----------_.. IMPROVEMENT X-- - - TO HE PAVED R 0 p, .PQI.VS. TO BE MOVED 0 T. POLES TO HE MOVED _ _- R/W W1DTIL_ SCALE 1 ??- So r. 2/27/95 DATE Site 1 Sta. 4+10 Check Dams Spaced as Required r Replace with 60 L.F. of 128" x 83' CIuPA 1 ? 1 rte,; Sto. 4+10 Begin TSD I 'r-I l-FF_f[fF 1 e i F 1I1l-1 er 5+00 5+00 ' t s7n 4+to i3tvznl TsD m 60" CMlr ` 2E' LIFO I. j.i 1 z-r, H Ls xTie OF I Z 8'' fS ?' " C41 PI'S 8x3`x ' s 5714, 4+ro tIUD TsF 57?, 4.10 ?'nJD F?12 THOMAS ABBOTT Z;, JAMES MOULDS 3712 KLONDIKE AD. (h 5319 DENVER 5T. NE LITHONIA, CA 30038 ST. PETERSBURG, FL 33703 (3) (2) r. I , 50 oC f ' i u„ i 0+25 b M v 'S JBOUP ' STS r o+wU (3c&xw T-5 4E V E, N.C. 28904 (1) r,n i ' n, O n ' 5771. (3c&l),V 1=6k ' 10100 z t I i i 10+00 TOM BRANNAN 493 MOSELEY DR. STOCKBRIDGE, CA 30281 (5) 94.00 /3c6zjU TsF 5714, +oo Erv6 D 8+90 4 IV II (3) I I t ?I /?' 15" 8 x3'xZ' S13-Li --- 5400 RICHARD KELLER 471 WEST 36th PLACE HIALEAH, I'L 33012 (4) 7+35 r I (2) 0 x3'x2 SB-?8 CMP REPLACE W/18" CMP? I 5+00 13+50 \ 1 Sta 13+50 \ \ End Buffer Zone ?1 ? ' r 13+00 i Sta. 12+90 - _ I Begin TSF&RB I Sit Basin T B ., 12+50 8?xYx 2' 1 F 1 12+00 1 11+50 1 11+00 1 10+50 10+00 to 12+00 11+50 11+00 10+50 Sta. 10+00 Begin Buffer Zone ?1 Buf f er Zone Encroachment #1 S.R. 1171 Clay County, N.C. (Dick Jones Road) Silt Basin Tyr B 8x 3x 2' BRDGE #79 13+50 13+00 12+50 Silt Basin Type B l 8 x 3'x 2' Silt Basin Type 8 8 x 3'x 2' ' Sta. 11+80 End Rock Berm Check Dams ?l'?? Spaced as Req?.nred I Silt Basin Type B 8 x 3'x 2' ? - - - - - - - - - - - - - - - - - - - - - - - - - A T 15+00 15+00 JOSEPH IIOGSED NEAL DREADIN RT. 3 BOX 295 1912 RUDGATE DR. IIAYESVILLE, NC 28904 PLAIN FIELD, IN 46168 (7) ? (6) 3+5o WD TsFdR.13? -11 -CMP L ff Sl11I7-+9o RC612V TSFat ZR l L:3 alx 3' x Z1 S 13 - DRIDGE #79 ?i I (3) i 8?X3'x2.?S8- 10+00 >L 1 REPLACE W/16" CMP I S?x3?XL? 5!3-QI SM 13+50 ErvO- 733F xz 58-? STT} 12.+0 o en/ D oGG 8 ?2M (5) 151, CMP? REPLACE N/18" CMP.I 10+00 _M J' 57-n 10+oo OCG.L7v Ua%/L zcwtico. Site 2 Sta. 19+75 20+00 24" CM 20+00 :?• : ' ' - -' REPLACE W/36" CHP. STTC#z f? ----- - i r 2_ r? HAROLD P u.E SR. 111 HULL. S'C. - LAKE LAND, FL 33805 (9) STA 18400 13G 63:7V 7-5F 17+45 3 3 rr a (7) • DEE BRADLEY I? RT. 3 BOX 418 HAYESVILLE, NC 28904 I 15+60 (6) 15+00 15+00 • 25+00 25+00 J.W. BENTLEY 1330 BARNES MILL RD. NE MARIETTA, CA 30062 (10) REPLACE W/18" CMP. r5" CFfP "K ?X 2,5 13 Y?4 23+55 L (7) 3 3 I I . I NOTE: MOVE,SAT. DISH OFF R/W ? a I U- 20+00 20+00 (9) Site 3 Sta. 28+35 Sta. 29+50 \ Begin TSD ` Sta. 29+50 \ End TSF 1 I Silt Basin Type B 8'x3'x2' og. ogg? a ,oo>. ReQbce with new 60 CWP Check Dams Spaced as Required fl -11 . 30+0 CM 0+00 :?. - - - ` - REPLACE W/18" CMP. 'X3?x ? 5 -r 5 ? s T'S `3TA 7-1+50 EW o T5 F I (12) s .• 29+00 HOMER DOVER ! )? RT. 3 BOX 294 ti HAYESVILLE, NC s i 8 )es `s ?- - - - 8+35 ' I ?///,? y REPLACE W/60" CMP. NOTE: WOOD RAIL FENCE TO BE MOVED OFF R/W. 3 3 Q a ? i 5 a" i 25+00 25+00 28904 w..?n.N?M?W?IIMNMM«?wr•Yw.? .... .. ?. .. - • 35+00 35+00 4 • ? CI•?LCIC pgiY15 s pAccl? F} 5 R e u rR e'1) (7) 6X `x Z' S -8 REPLACE W/18" CMP. ALDEAN DOVER °C RT. 3 SOX 294 HAYESVILLE, NC 28904 (12) r, } ti A 30+00 . 30+00 40+00 40+00 i I I I IIUEY hOCER5 RT. 3 BOX 282 IIAYESVILLE j NC 28904 (13) 4 (13) 37+60 Q I: i 5 (L! • 18" CHP 35+00 35+00 (12) REPLACE W/NEW 18" CMP- 31K3fK2.' 513-8 1 Site 4 Sta. 41+75 r i R ith new ?? e w •og;; . IgoSgBoa ,ooooo I i i I i r- a -- - . - e N -- - Check Dams Spaced as Required i I t Basin Type B 8' x3' x2' - - - -- - - s- F?l - - - t e " 4 8 L. C -1 ,2 e c .•..?.. ?........«,?.,....... ,..,. 45+00 ?j 45+00 ' (15) ® Y?lgq S?k3?xz?s0-!3 X15) ?l, 8?x3?xZ SC3-13 44+55 44+55 1 8' BRIDGE #68 - Q?-s 4 A. C. MOORE JR. P.O. Box 56-A WALESKA, CA 30183 (14) (13) 5=T? # • 48" CM ) L REPLACE W/60" CMP. 1 + - ?•- - - 4 40+00 40+00 (13) 50+00 50+00 re r -57*, 49wo Sct a4uT5F 4--5 STA +bo A ROY IIOCSEU 848 ANDERSON RD. NE HARLEM, CA 30066 (15) I' f (24" C REPLACE W/NEW 24" CMP. 0 a I 45+00 I, Q I? ? i 45+00 (15) •."r 55+OU 55+00 52+80 E.U.P. ?7A. 52+86 gaN [) F _ (15) I i 3714. 5l+oa die& FGK 577q. 51+-00 e-rob 7'S F_ LL 50+00 of 50+00 .„. n.ww.mn+.wwn?..?...?n.?lrnM??l?.?...-'n.wwnr•..+•w..w...nnn .ti?M1?Mw+wIN14.+nnM. ????•••••w.w rn?.nn+.r.wn+MMYnI+?"W+i...'n ?y,ry__rJr_r..w....... •. r..n._w...nnn.. .?wWn.w1_.r...r.... 1 ? i • 1 EROSION CONTROL DETAILS AND SPECIFICATIONS Sid, Description Sym bol. r= 245.03 Temporary Silt Ditch ..... ........................ V1-2 245.05 Temporary Diversion - --VI-4 893.01 Temporary Silt Fence ..................... ---FFt-----f+l--- ------ -- V1 6 890.05 Temporary Slope Drain with Earth Berm .......... _!- • -_ VI - s 245.01 Silt Basin Type A ............................... - --------- ? ---- VI 10 245.02 Silt Basin Type B ,,,,.,• ...............•,.. = __ _ VI - 12 892.04 Temporary Rock Silt Check Type-A ......... . ---------- - VI 14 895.10 Temporary Rock Silt Check Type-B .....•,• ,, _________ __ VI 16 892.01 Temporary Rock Sediment Dam Typ A .. .......... __ _ vi - 1s 892.02 Temporary Rock Sediment Dam Type-B „ . U , __________ VI - 20 897.01 Rock Pipe Inlet Protection ..... ?.?....•..,,;,,,A„• VI - 22 894.01 Rock Silt Screen - 245.04 Stilling Basin ....................................... .......... . ® ----- vi - 26 Rock Inlet Protection: -• OR --A ----- vi - 30 896.01 type A ............................... A LIJ 896.02 Type B ............................... B IFI-- OR • B) ----- VI 32 896.03 Type C ............................... C ..OR •• C ---- VI - 34 V1- I March, 1993 r0posL'() )(el l ................... . . • ,?I ? x.;stil)t Road .... . ................ r - Railroad ........................... Control of ;Access Line ............... --- -" n Slope Stttlce Line .................... Bridge . . . .. . ...................... CUlvt!rt . ............... . Woods I1 ................. Q j? 'I r --"1 TelepholW or '1'el???r:liil? Pole ......... Totter Pole and Line ................. --•-----_??--?=?? '0oiVQr oolo .. ...................... .6 II'It(li' b I L'`?Sellll'l1t L111C ................ • • . • • . 11'lt?win l.ltitit ........ • ............ . . Guard 11'ail ?, ?+. • .................. . Sahltary Sewer Line ................. Water tint + ...................•+.•. Gas Line , . . J . . . . . . . . . . . . . . .. .. . . Chain Link Pence ................... 1+?'ovetllVit•t: T'encc: ...:..... . ....... . IZe;t:ner:xtiott ... . ......... • ...... , . . Rcrol•estntion .. ............. ; ; . 'lTentpot';11;ySilt Ditch ............. , , . . --?•---III------; I ?-- Te n i p o r:?1•, V, Silt Fence ........ ...... -411 . `fentporni'y1.`ilope Drain ........... . .. T Brush 641111,11.1'' ....... . .............. Silt'Chech Clam 'type A .... • ...... • ... ^ Silt Check bilm 7yUe B .............. . sat Mhbin`ly?peA .....••••••• ••••?•• Silt Basin '1?pe B .................... bock Silt Check Dam., ............... rarlli hcrm . ................. • . T011h. Stone `bitch Check .... . , -Lu N I'IfUI'?.U F::C15't'I?'r - o----?-i?-- -o----o-- . 1' 1,1 ill 1 j 1 ; `? TEIIilPOR/1 RY CROS/OIV CONTfrOL SYMDG `TEMP STONE DITCH CHECK ECK } /SOCK, S%LT;Cl. DAM r^. i i i. f. l f:? l TEMP SLOP' DPWN rE"M P SILT O1FCV •4 P Tf-l L%1 8/I Nl- 1M IV T Y I 1 j 1 C?3t?I-?'GL_ASS hOvlNG r I -TS D 3.. 1 1" cl Ik-.? TEMPORARY SILT DITCH: -'MD A temporary silt ditch shall be used in place of silt fence in many situations. Temporary silt ditches shall be used at the toe of fill slopes to divert runoff into sediment basins, temporary rock sediment dams, temporary rock silt checks and/or other sedimentation control measures. Temporary silt ditches are approximately 1 ft. deep, 2:1 side slopes with an optional earth berm. AREAS OF USE: Toe of fill slopes where fill exceeds 3 ft in vertical height. Along streams to intercept flow and/or divert to a controlled outlet. VI-2 March, 1993 1%,,,, .•I wia O M F v N N TIJ L) JD CD -= W I- Ia] d y O (?? J?? ¢ r? O aQa_ 0 a w ?z-0 W ' 0- LLJ o wr N V1 O r w f' Q m ~ ,lI a (n a M 1 0 r? - fil c v, 0 G Zaa ?0 I o e w cr in --- PT D m + O Q I I VI-3 March, 1993 TEMPORARY SILT FENCE: A temporary silt fence is commonly used at the toe of a fill section to prevent off- site sedimentation. It is made of permeable filter fabric buried at the bottom, stretched and supported by steel posts. The silt fence reduces the water flow while retaining the sediment. They may also be used to divert water flow to protected outlets. Silt fences need to be checked after each significant rainfall to ensure there effectiveness. They must be maintained on a regular basis. Silt fences shall not be installed across streams, ditches, or waterways. AREAS OF USE: • At toe of fill sections where sediment runoff can be stored and contained inside the project limits. DESIGN CRITERIA: Material With Wire Without Wire Fabric Type 3 Class A Type 3 Class B Steel posts length 5 ft 5 ft. Post spacing 10 ft. 6 ft. maximum VI-6 March, 1993 1 LLI LLLJ rv- 33 2 ~ H 0 o 3= H X3 Q X m ? zD w? m? 3Z J LLJ U 0 ¢ Q ? O wN 0 N_ z a w m O a 0 i Z2: az cn w 0 oQ ?O 0m O m a J J mQ O 2 ?-- Ln U_ M m LL Cr w J LL W Cr 3 W O Z J J U `-' . , LL m O ¢ w LL LLI m u (r ¢ L3 J 0- ZO O LL ¢ U N on 1 V it I I- a a Vo III M lll` n= O 0 o Z III_ ?Z LLJ QW ?I ------ --------- LLLd -------- -----------'z o o ?- :? U, z z -.l UJ W ¢ z w cc N w Z Z 3 Z `• O a W W LL ¢ CO = m LL J W Q WN O m W N o = 2 J U) >_ U m = m LLJ ¢ J? 3 Q JZ J Z?w-a 1- J J Q Lr) Q ¢ LL LL Cr Q W J J m o 3 F- W mo p >-N Co -? 1- Q Q Z Q ¢ LL 3¢ Co 0 p 'LiJ O p = U) w = Z '-' m Z 0 0 6 W Z W J Z ¢ Lo z m F- 0J z JcDWU W = W p 0m -+ 3 w U-i m F- LLJ ?- Ln L' J O 3 3 Cr Lo ¢ LL Z 0 z O LL 41 i w Q C f) 0LL0 2 ¢ l wCD LL a 0 zzm 00 W iA W U W LL J c`n a? ?xU >- viz O pOw OS W D ~ W? p E'o a? zz a F z s a 0 w z O JD C w w C (f) >% N w v r to VI-7 March, 1993 SILT BASIN TYPE-BS A silt basin type-B is a temporary basin built to collect sediment flowing through a drainage way. The silt basin is built at the base of the ditch with its length being at least 2 times the width of the basin. The type-B silt basin is generally built in conjunction with temporary rock silt checks and other devices that control or slow down water flow. This device must be monitored closely and cleaned out on a regular basis until grass is established along the ditch line and sedimentation is no longer a problem. AREAS OF USE: • In conjunction with temporary rock silt checks and other devices used in drainage ditches. DESIGN CRITERIA: • Width - variable • Length - 2 times width • Depth - 2 ft. minimum storage - 1800 cubic feet/acre (equals L x W x D) VI-12 March, 1993 TEMPORARY ROCK SILT CHECK TYPE-B: )0- A temporary rock silt check type-B (also called check dam) is a small dam with a weir used to reduce gullying in drainage ditches that are to be filled or permanently stabilized at a later date. These type-B rock silt checks help reduce the flow velocity and are generally made of class-B stone. They are used in ditches during construction where the grade meets and/or exceeds 3%. AREAS OF USE: In channels, roadside ditch outlets, temporary silt ditches, and temporary diversions. In conjunction with type-B silt basins. i DESIGN CRITERIA: Center of rock silt check shall be at least 1 (top of channel sides) The spacing (ft.) = (3 / % of ditch grade) X VI-16 foot lower than the outer edges 100 ft. March, 1993 W F- m u 2 U F- w J -? U u O l'- U W O a w Cr W > O ?- ILL LL a_ 0 0 0 F- 3 W z Q J O z 0 It J a a Z rl _LLJ z O_ F- U WO Un W Un W O> U 2 U U] J I I O b 3 O W W ? > Q = Z Cr_ O H LL Q O a LU > W Q W Co II N _ _ _ _ a• i i „L 0 J LL m r ti o a Un W Q ?m a 111 ?- ? - Z 0 a. O _ U z F- o -' Q ? W O 0 (j) N 0 W 0- [r U Q I1,' W Q Z Jm 0 J Q Z Un0=OZZ mUn000 mZOW U) OZ=CC O JUQF-Wm• J mW QZ^F- 20• QWm- m-mUOm Cn. m W O O m ZmU)LL CL WU) 0WU zcn W F-- Q O I- O Q F- Un m J - -+ F- J O OUQZMU Z LL -- d =)• -- CrI Z o O W; v)I a of z a z, OvQ' -ino1, o W; oI W a 'r dim vF?. ? m m W U U ?- j c n ci r ? J?U Z U x.? ? oo a 0- <T- W CD ?p m F LLJ m 0 Q F- a n VI-17 March, 1993 ROCK PIPE INLET PROTECTION: A rock pipe inlet protection is a horseshoe shaped structure with a built-in sediment storage area around the outside perimeter of the structure. The rock pipe inlet protection shall be used at pipe inlets no larger than 24 inches in diameter where it is receiving flow from several directions. The rock pipe inlet protection utilizes class-B stone lined with #5 or #57 stone to protect drainage pipe structures by trapping sediment before it enters. They have a sediment storage pit which is designed by the same procedures as a silt basin. This device can also be used around the inlet of temporary slope drains where space is limited at the outlet end of the slope drain such that a basin or other device can not be used. AREAS OF USE: • At inlets to pipes no larger than 24 inches in diameter where it receives flow from several directions. • In areas where it can be cleaned and maintained on a regular basis. DESIGN CRITERIA: • Structural stone - class-B stone • Sediment control stone - #5 or #57 stone • Sediment storage area - 1800 cubic ft./acre • Dam height - 3 ft. minimum t VI-22 March, 1993 ..,?.?.,.?.,...r..w.,. .... ,_.............,?.,..w...........,._•___ VAN Q W a_ a s J W w z f' <a i Q? J w w N F- Z a Iz -wz o (no - h D z z x >- ao f- a?w m U'zoawcn?(1)00 x o zamUm°m0mmaow z(n- 0w z u. 0aw• CrO Jw(n mwwLL (nO m(nZLO Jz aJU ?-o1-o(no aOzw Zw J (n - - w Q U S U O Z (n y a Cr Q a Z J o in 1- O z (n W mmaDwu?-z w ?-ow w V) w 1- o `- w w zz ?_- w U' (n m Win - u w m u- J Z m a a J z a- o D a a (n 0- 1- O w F- 3 z m J J m- m O J W a W w x a X W w 1- U J 1- 1- w J z U 1- - W W 1-(J) a z z z w Q o m z o U m w O w 2 00 0 2 1- O Cr 0 U F- 2 z m (n u 1- U (n (n w a U Q O 1- 0 z D O W 0 30T X LL z W w, n a t a (D i i fn Cr- >t Z i Q i LL) w z z 0 0 N N w w 0 0 a a Cr m 0 0 m N o ? O O Z J w LL 0 w W 0 w U z o W J O m z 0 U 1- z w E O w 41 ? r-- 0 V N ..-'iwcwz J a m H z w z O F-- U) J Q -i Z u Q ? J z ih L o - dIm W v, ? °D 0 W F- 0 w J ?xv z Uu xx? F-W CL Q ow zz? Y Q ?' U wr O ?A 0 CC a 0 z a U) VI-23 March, 1993 ROCK SILT SCREENS A rock silt screen is a low-level dam structure to be used in streams below culvert sites. Rock silt screens shall be used to trap sediment transported by running water and shall be placed in the stream below the construction site within the right-of- way or easement boundary. The rock silt screen utilizes class B stone lined with #5 or #57 stone to produce a ripple-effect in the stream to settle the larger sediment particles transported in the stream from the construction site. The trapped sediment shall be cleaned out before the device is removed from the stream. AREAS OF USE: • In live streams below construction sites where construction occurs in or adjacent to the stream. • In live streams below a culvert construction site. • Where it can be cleaned before it is removed from stream. DESIGN CRITERIA: • Structural stone - class B stone • Sediment control stone - # 5 or # 57 • Dam height - 1.5 ft. minimum and 3 1 ft, above normal flow of stream) stone ft. maximum ( shall not be higher than VI-24 March, 1993 !14-1 / I = 3 a W w Cr a 0 w ? a m 1 ZZY Qm LL O a 0 a W W F z a "4 x AFwZ 01- z p W F 0 W z F a 0 F O w o¢ d w o z w U r a w w ZU2 rx?? p AadW wa Oomoxw ax aa, ?a¢ ?WG.ll.? Z°?Z fn ' = CLWW a?U) 0 0 ozzwAo U O A z 60 ¢z Ova E,O O W.rx.a.'Dwz w F zw U A? E-W wFZOME4WzFW AWy w E-IF??FaE?AawdWFFd?adF FV) z <zz¢cwi?¢0W.UZ?g G.. O W0=00"'? =FoaO w z MUMUF V !nM[i.CL u W-6 X Z (I CD LL O a 0 3 W Z j f H z 0 CC X a w z o z ? I ?t ¢ ? U O NI't U ??• ? W z 0 N Q F^o' 11? z W W U (I) J 0 U') e xmci U wow 0 zz c ooa C!y O W? Q H O V) Q f (17 vn 1 0. mI O 1 0 N zl ,? ° cn z z l i o a E F a: u, m l VI-25 March, 1993 V j