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HomeMy WebLinkAbout19961139 Ver 1_Complete File_19961212State of North Carolina Department of Environment, Health and Natural Resources Division of Water Quality James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary A. Preston Howard, Jr., P.E., Director LT.WYWAA&14 ?EHNR January 6, 1997 Cherokee County DWQ Project # 961139 APPROVAL of 401 Water Quality Certification and ADDITIONAL CONDITIONS Mr. Brian Burch N.C. Dept. of Transportation P.O. Box 1551 Andrews, NC 28901 Dear Mr. Burch: You have our approval to place fill material in 0.04 acres of wetlands or waters for the purpose of improving the existing roadway at SR 1379, as you described in your application dated 5 December 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 except as modified below. If you change your project, you must notify us and you may be required to send us a new application. If total wetland fills for this project (now or in the future) exceed one acre, compensatory mitigation may be required as described in 15A NCAC 211.0506 (h) (6) and (7). For this approval to be valid, you must follow the conditions listed in the attached certification and any additional conditions listed below. Applicant is reminded that HQW Best Management Practices shall be used for this project. In addition, you should get any other federal, state or local permits before you go ahead with your project including (but not limited to) Sediment and Erosion Control, Coastal Stormwater, Non-Discharge and Water Supply Watershed regulations. This approval will expire when the accompanying 404 or CAMA permit expires unless otherwise specified in the General Certification. 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. 27611-7447. This certification and its conditions are final and binding unless you ask for a hearing. This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions, please telephone John Dorney at 919-733-1786. Sincerely, ti? ? r ston Howar , r. P.E. Attachment cc: Wilmington District Corps of Engineers Corps of Engineers Asheville Field Office Asheville DWQ Regional Office Mr.Idhn Doimy Central Files 961139.1tr Division of Water Quality • Environmental Sciences Branch Environmental Sciences Branch, 4401 Reedy Creek Rd., Raleigh, NC 27607 Telephone 919-733-1786 FAX # 733-9959 An Equal Opportunity Affirmative Action Employer • 50% recycled/10% post consumer paper t ' 401ISSUEa STAFF OF NORTH CAROLINA DEPAPUMENT OF TRANSPORTATION JAMES B. HUNT JR. GOVERNOR Cl IEROKEE COUNTY SR 1379 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 11.0. Box 1551 Andrews, N.C. 28901 December 5, 1996 RECEIVED OW 12 1996 ENVIRONMENTAL SCIENCES -^Anv%4 GARLAND B. GARRE-1-I' JR. SIICRG IARY The North Carolina Department of'I'ransportation (NCDOT) is proposing to grade, drain, base, and pave SR 1379, llyatts Creek Road, primarily along the existing roadway. In order to construct this project in accordance with our current secondary road standards and due to the proximity of Hyatts Creek (DEM Class C) and Slick Rock Branch (DEM Class C-Trout) and replacement of pipe culverts, we are requesting authorization under Section 404 of the Clean Water Act. I am sending a straight-line diagram with the proposed erosion control, stream, stream bank, and construction limits at various sites along the project where we will be in conflict with the streams. In addition, I am sending a typical section of the road, cross-sections, drawings for pipe culvert replacements, general notes and standards oil some erosion control nicasures, and a marked map. We propose to install all the new culverts slightly below the existing streanlbed where bedrock is not encountered to minimize impacts to wildlife habitats and allow the 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. K Mr. Bob Johnson Page 2 December 5, 1996 By copy of this letter, I am asking Mr. David Yow, North Carolina Wildlife Resources Commission (NCWRC) District 9 Environmental Coordinator, to comment directly to you concerning the 404 Nationwide Permit request. Also, by copy of this letter, I am requesting authorization to proceed under Section 401 of the Clean Water Act from the Division of Environmental 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, Brian C. Burch County Maintenance Engineer BCB/rr Attachments cc: Mr. Richard Phillips, P.E., Regional Engineer DI?I INR 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, DEM Mr. David Yow, District 9 Environmental Coordinator, NCWRC t DEM ID: ACTION ID: Nationwide Permit Requested (Provide Nationwide Permit Ii): .,3? JOINT FORM FOR Nationwide permits that require notification to the Corps of Engineers Nationwide permits that require application for Section 401 certification WILMINGTON DISTRICT ENGINEER CORPS OF ENGINEERS DEPARTMENT OF THE ARMY P.O. Box 1890 Wilmington, NC 28402-1890 ATTN: CESAW-CO-E Telephone (919) 2514511 WATER QUALITY PLANNING DIVISION OF ENVIRONMENTAL MANAGEMENT NC DEPARTMENT OF ENVIRONMENT, HEAUH 1, AND NATURAL RESOURCES P.O. Boy 29535 Raleigh, NC 27626-0535 A7TN: MR. 1OHN DORNEY Telephone (919) 733-5083 ONE (1) COPY OF THUS 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. i 1. Owners Name: 2. Owners Address: X3.x , ?y.12fr?s , il?? ,2690/ 3. Owners Phone Number (Home): (Work): ///-`0 1/) -?W - 4. If Applicable: Agent's name or responsible corporate official, address, phone number: 5. Location of work (MUST ATTACH MAP). County: Nearest Town or City: Specific Location (Include road numbers, landmarks, etc.): -. Ee 1-319 , 5 z 6. Name of Closest Stream/River: ?i " "c y J i%E.C 7. River Basin: 8. Is this project located in a watershed classified rou SA, HQW, ORW, WS I, or WS 117 YES M NO [ ) 9. Have any Section 404 permits been previously requested for use on this property? YES [ I NO W If yes, explain. 10. Estimated total number of acres of waters of the U.S., including wetlands, located on project site: _ (?. o y,?K- 11. Number of acres of waters of the U.S., including wetlands, impacted by the proposed project: Filled: e) 0---// Ac,- Drained: Flooded: Excavated: Total Impacted: 6 0 Jllhc I ( ?? ??-? ?? /?,/?? ?., r ???,::-\?\ J J )J \?.-! f 1. {?, , Q ??,JI ?_.? %fi ??.?r = - ,?--?/ " S rte? KSz ?? `-•c-?T.s - ?, Jf?y? ? ( `, ? ?;??. J ??. _J_ ???? _)? , . 1 000 `yy( ??) ? S ? `,`\ ? --? ? ?ii1 `'1?`l? ?_ ?\?. \,) J,s?? ? ? I - ? j' f? ???13ri"I \??-?„_. ??? , ? ??:a' l.• J'? ::=?^',? Zr? 1 c `? MG \. -??. Birf:?l? Q- N1 L- W f $OV II'{? ' -. ? %i?-•.J ?, l? 11-, .. V'• ??==• ????\ I ( ?? dtro •?--? ) ? V""!? ? ??-????)1! /? ? ?/ • . •(_ ` ?l/J.'?_ /? C 1`?(`Z` il•?;' /_") ????? ?1' __? ?? ? ?`(1 ? ? '.IL - r1?<I?? 1\\`I//! r!.\???\\1?.? )) / /(,5p??1 5??..-f\? '" i? ;? t' ? (/,` ((I'(', ?-, l\ ?jlll)( ?I\ i' 1 l\?\ ?f}? ??) _?) '•l? sc. r ?\) ?', ?? ?o,, l -1 f Jf?• ??!r? 1 ti I tr ?1'} l ('??1 1 i ?L \,-.? ))?) ._ TAW t,??` , ?'J?l ( vff `. ) ?jl? ?l \` ?1 ?Il ( lly )\ 1? i? ? ,,(f???? 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Z x ? ?r i ? ? .,? ? , e nv s O t 1„ 40 I' for I p ? y I o r BSI,", ? ?3 IY CC,` _ \[?, L Y ?ssT'' Ar \ u y ? p A 1 Tt[? ,1 J O n 3 ? ?. ? erso• - O D ?? till 's b t` . . r CIJEROKEE to _"1) _bLAU IIYATTS CREEK ROAD 1379 S_ R_ W. () 6.912116 kHOM END OF PAVEMENT OF 1379 to END OF MAINTENANCE 58+11 AUDITION 1 I MPROVEME:NT ? R 'I0 BF PAVED L, POLES To BE MOVED - T. POLES TO BE MOVE I) _alw ylDTH :;(:AI,I: DATE: 0 0 5Ol I 5O' 7/5/95 t ROSCOE JAMES k'r. 1 BOX 470 MARBLE, NC 28905 (1) 5100 -? - 5+00 I I I - 5 0- 0+00 0+00 . I. A, ROSCOE JAMES R'r. 1 BOX 470 MARBLE, NC1 28905 (1) (1) 10t00 4- 5 '11 00 10+00 ?I i O ? I I I ?I i S+00 (1) 15+00 AREA TO BE IMPROVED (1) 3 I BEGIN IMPROVEMENT 12+09 10+00 15+00 W-. AREA TO BE IMPROVED (1) I3 a 12+00 BEGIN IMPROVEMENT II i( 10100 i ?I I ? I r.ru? irutcuvcru.ivi 20+00 AREA TO BE IMPROVED -- --- _? - (1) 3 BEGIN IMPROVEMENT 17+00 END IMPROVEMENT 1. _....L.._ __. 1. ill) kill i.vv&.eu.lvt ?0+ 10 ' I 18, i , -- CML'_ } =REPLACE W124" CMP AREA 1'O BE IMPROVED I I i (1) s K 15+00 a 5? 17+00 BEGIN IMPROVEMENT i i _ i i i II 15+0,0 END IMPROVEMENT --- --- - - --1- 25+00 - ' (1) I'L 24+85 END CHECK DAMS STA. 24+85 <--5 IT- U. S. F. S. (2) 25-fO10 (1) 24+-85 PL I 0--> v v1 END CHECK DAMS STA. 23+75 U.S.F.S. (2) 3 2 BEGIN CHECK DAMS STA. 22.#00 END SILT FENCE STA. 22+00 BEGIN SILT FENCE STA. 20+15 PL 20+15 20+00 (1) BEGIN CHECK DAMS SPACED AS REQUIRED.,STA. 21+00 END RIP RAP DITCH STA. 20+75 i i I I i I I BEGIN RIP RAP DITCH STA. 20+15 20+15 PL ._ (1) :i0+00 IV U. S. F. S. (2) 30+00 -5 W- BEGIN CHECK DAMS S'I'A. 28+10 PL 28+10 3 (1) cc END IMPROVEMENT [--;REA TO BE IMPROVED] Y aC (1') 26+50I L6+7U END IMPROVEMENT 0" AREA TO BE IMPROVED UILER m All, 1 i REPLACEMENT PIPE TO BE y---"-' DETERMINED i BEGIN IMPROVEMENT 25+00 25+00' BEGIN 114PROVEMENT c U. S.F.S. (2) BEGIN SILT FENCE & ROCK BERM STA. 28+10 28+10 PL 35+ UU I - I END CHECK DAMS STA. 34+00 AREA TO BE IMPROVED 1 U. S.F.S. (2) BEGIN IMPROVEMENT 31+00 i 35+00 nI 1 :r. I cr IT - 30+00 -I AREA TO BE IMPROVED --, U.S.F. S. (2) 3 Q 31+00 BEGIN IMPROVEMENT l i I , 30+00 1 i I i END CIIEICK DAMS S'rA. 40100 f ' 4U+UO I -- I---- 11 40+00 AREA TO BE IMPROVED U.S.F.S. (2) BEGIN CHECK DAMS STA. 37+00 SEE SITE # I END CHECK DAMS @ SITE I v cr ne AREA TO BE IMPROVED U. S. F. S. a (2) BEGIN CHECK DAMS STA. 35+25 35+00 rt REPLACEMENT PIPE TO BE TE^ DETERMINED 35+00 45+00 END IMPROVEMENT 44#50 45+00 44}50 END IMPROVEMENT 48" rAS I RON . ® x or- BEGIN SILT FENCE & ROCK BERM STA. 43+50 SEE SITE N 2 END CHECK DAMS S'TA. 43+43 AREA TO BE IMPROVED (2) BECIN CHECK DAMS S'TA. 41+20 AUU 18" CMP l - --- --- ____j BEGIN CHECK DAMS STA. 43+50 REPLACEMENT PIPE TO BE DETERMINED END CHECK DAMS s'TA. 43+43 AREA TO BE IMPROVEI) ac ?I v [F-. ?' - - ,rJ 18 CMt 40+00 40+00 (2) BEGIN CHECK DAMS STA.41+60 END SILT FENCE & RUCK BERM STA. 41+60 BEGIN IMPROVEMENT BEGIN SILT PENCE & ROCK BERM STA. 49+30 END SILT FENCE & ROCK BERM 0 SITE # 3 U. S. F. S. (2) ABANDON (SEE SITE #3) 50400 5040 - REPLACE W/24" CMPJ 18" CMP i 49 50 _ 49+50 _BEGIN IMPROVEMENT ® BEGIN CHECK DAMS STA. 49+30 END CHECK DAMS SITE # 3 V 3 c 45+00 G C Q" V 45+00 v U. S. F. S. (2). BEGIN SILT FENCE & ROCK BERM sTA. 54+00 END SILT FENCE & ROCK BERM sTA. 52+70 AREA TO BE IMPROVED (2) 15" VI 55+00 BEGIN CHECK DAMS STA. 55+00 CMI' REPLACE W/18" CMI' 0'-> END CHECK DAMS s,rA. 54+00 - Vr 55+W I I- t 3I 50+00 50+00 3 AREA TO BE IMPROVED (2) (;) f UU r 1 581-11 E.O.P. IR(N SEE SITE # 4 i IR(N I:ND SILT FENCE & ROCK [TERM :;ITE # 4 3I CL U. S. F. S. (2) AREA TO BE IMPROVED 55+00 (30400 58+11 E.U.P. REPLACEMENT PIPE TO HE C} 4 DETERMINED i 3 11. S. F. S. (2) END RIP RAP DITCH STA. 57+00 0 J: 55+00 IV AREA TO BE IMPROVED BEGIN RIP RAP DITCH STA. 55+75 -5,/7-E /a _:?? 125 -t (10 ?f ,?EGe A-5 ,ei a , &4 S, a ? ??rGa ? I I I l i lt ' o za i S It E -IL oLD A 36+27 orb's' N W Rip 0.(\P D -,r r- N o?- ,O X ROCK SALT X 36") SLR?Eri 0 12' X 2)'X 22 _ 5 Lr &3I1J s qe. CIJ?CGk DAMS p a?iLf' FgNGE sPAcr.D AS ReWD Rock L3EKr1 o _ r 1 ANOTE : Ex I STI NCB PIPE TO o BE S IZED BY HYDRAULICS Ir 1 TF i t! 141 i 5, Lr F?nICE V /lcx.k 13?RM ,--? 1.1 x 3 X Z SALT BASIN lyd ?-- RocK 51 L`r Sc R t? r ti czar<k DnMS SPACED AS 2p-civ a N OTE ' EX IST I NG PI PE s? TO RE SIZED BY VJ HYDRAULICS - -j_ t 1 4-1 1j, ?_ - - . r M ? •Y. " Kock SQL- a n • / o / o 0 0 o 0 a n ?o e 0 0 eLD NEr/ f :i -J _ - 1- r V n; / I ?aN II 12x3'x2-?" S I LT a3 s w ,E- Sol, IN? WEav 4- I, ate , ROCK Sir i SCRL? I v T l(? T_ , STA 57+90_ o Igo c1` t? ? f?.c?1 i? u ? n"x 3 x z' °? r SI LT RVAI1 8" ?r J NOTE: EXISTING PI PES TO BE SIZED = o BY HYDRAULICS r 57f ?? VJ / RIP QAP I-)itGN1 pw NE.W v .. o u _ a p • i s 1 xl - A 1 rA 3lliHi+lll EROSION CONTROL DETAILS AND SPECIFICATIONS `;I . # DPsuipliorl r= 245.03 TerTiporary Silt Ditch .............................. r? _-- VI 2 245.05 Temporary Diversion ,,,,•••,,,,,,•,,,,, .? ___ VI - 4 893.01 Temporary Silt Fence ...... ............. -..11F -- -------- VI - 6 890.05 Temporary Slope Drain with Earth Berm ......... ! `-- VI - 8 245.01 Silt Basin Type A ,,,,,_..... k VI - 10 245.02 Silt Basin. Type B ................ .................. 7? -_- VI - 12 392.04 Temporary Rock Silt Check "Type-A ....... _. ----------- V1 - 14 69;-.10 Temporary Rock Silt Check Typ.............', ____________ VI -16 092 01 Temporary Rock Sediment Dam Type-A I" -- - VI - 18 V9 02 Temporary Rock Sediment Dam Type-8 ... U ----------- V1.20 K17 01 Hock Pipe Inlet Protection VI - 22 694.01 Hock Silt Screen .........................................3 VI - 24 245.04 Slilling Basin ......._......... ................................... ®-____ VI - 26 Hock Inlet Protection: ii9c) 01 Type A • .............................. A13--OR ' A ----- VI 30 f?9E; 02 Type 0 ............................... B U-• OR B ----- VI - 32 t?: ' 03 Tyne C ........ ' ...................... C OR - C ---= VI 34 V1- I March, 1993 /t•\ '••,I!rvl ?,( .'.?.c:?' ;?, 1. _.. ___ 1,1'. -_ - -_. ---- L) I. IoII I'o e I:?I,; o .r'Itnl' U I Pole ,Intl line . . . . . . ....... ---.-- /- --?-- I'r Nvor Pole ......... ............. .. .I ...... .... .. ........ ??- ?il, ircl Ii::III . . . . . . . . . . . . . . . . . . . . . . . . . ----L ?nit?r? Sep, car L,int .. ............. . . - •--- `. .-. 5? .. `' I t e r Line .......... ............... ---r-? E- -; I .:? I.1110 ............ ............... --:?---- -.Is -o .... ............... -? ?1- '?'? 1 V ire 1 ' ?' n c c ... ...:........... - o - ---+11- 0----?r- ION ... ............. !'': rl!>or a, v '3i)L Ditch ................ Iti:i r•l? ',IIL»rAIT `lope Di Jim .............. T r I I.! l ;, t I I' i r I ....................... i? ."r:[ ('Ilc.`c•I: ll:trlt Type :\ .....-...... n c Ilr ?k Da [it "1)9)e 13 .... ......... . !?;I? in 7}hc /> .................... ; n "1),p c 13 ........... ....... _ l h 111' (: I : I) ;1 r 11 . . . ` ! r I I . . . . . . . . . . . . . . . . . . . . . • - --? -? .--• r >a. ;/I FAY /70 lO/V CO/V l/1jOX 5IvA11L fl'If ' , MN E DITCH I 1,'()CA- S%L-T CHECK DAM l_ T- 8A- SIN- 8 -';LOP[---- 0 ;',4 /N S/L-T O/ i CH i F1 /V CF i f .:1 ???? 1 C) VI ICI C? Pl-*-? . LL?G T T-50 _, - l= GR 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 die 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 die 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 .W i VI-6 March, 1993 m° w (r-? -- z www J W 3 1- r o _° W ,~. ° w 3x > - X 3 ZN ¢ ¢m ? X m JJ C) -j 0= ?Ln Z) 07- .-ii ¢Z Er F-- mw 7-0 O¢ O@ m Om ¢J J o?= ?- A V/ U W m ¢ LL cr w r- J i LL w m 3 n n it I I? (OIL COL ?I I I V O n Liu ) O _ (T x 0 .--1 ." z 'I I I_ h) U Z N? cr w a? ---------,L - ------ y CD ------------------- 'zO CD V) z z ;DWW J cr X J W3 U '-' cr- LL m ° III ``W ? VIII ?. W :3t 0- Q C) LL ?? I I I to ¢ M F- D Z LD N M O w z w F w 2 Z ?, 3 Z <E 0 >- W W La- Z a CID CD ? 2: te, (V LL) -J M m Q O W V) (0 Z ¢ J X z co w W _ J N r 0 S m a J? ¢ JZ J W W a )- J ?r w J 3 (f) Z LL W m v?iw v=?iU) O f- w F- :w N _J 03 F- Qa) 0 -OrN 00 J F-a = a LL3ama ° w w V) 0° w WW 3 z (n W r _0-J ( w Z ? JLOWV w x w O OM 3 3m ai Nw(n - LD 03O ZLL ?.O CL LL a.. m 0LL o w z z ¢ z ¢ w O z 0 z q 0 w w m w? L a O zm W R W z W LL a x?a 00 U. zz: w won W> acf) 0 a F- U) 0 t--.o N V1-7 March, 1993 SILT BASIN TYPE-B: 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. Tlie 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 oil a regular basis until grass is established along the ditch line and sedimentation is no longer a problem. AREAS OF USE: • 1n 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) V1-12 March, 1993 Y11;u 1 ,1 II III ? i??'I? v) ' Y ail ? J vl ??" ' ,II? i ,)Y? ) 1 tY o -- 1 ), v YI 1 V 1 Y All ? ?1Y I )t? 1 ?,, __ I 1 t „' IIIII \lY) t",,MY1 ..0 •.L , v Y '? `? ? IIIIII F JI SIN. Y )t I v - IIII - I IIIII ,L .)t JY, -- o MM„ t ! fn ;,j )" ! I ' . ))) ? I l IY IIIII IIIII -- i \)' 1" "J v IIIII W .. _ \ \ 1 ,?1\' IIII I v? YYY I A YA. r?i ; 111111 II II 1= , z ? ; IIIII 'WA ?? o 11111 "J I IIII I )Y NI )t Y,1 S I III I ? \\11,? ? ; l) J ? IIII IIIII a o lit Y j ?;)?jt \)Y)1 1\)t\ 1 E -- 1? v ; JI, Y1 u? 1Y 1 Y Q V - - a IIII =_ m? z 0 a w J w ra O N 7.. m N W . to F7. Z .J;- ,-_, Lr) mQ J.Z(: W 24 xm:? F?,? J oom 00H lL W ? O ?Q z? a 2 O I O L O fl I .O E f >1 in F I I V1-13 March, 1993 TEMPORARY ROCK SILT CHECK TYPE-B: . . * I?41-• 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 Or USE: • In channels, roadside ditch outlets, temporary silt ditches, and temporary diversions. • In conjunction with type-B silt basins. DESIGN CRITERIA: • Center of rock silt check shall be at least I foot lower than the outer edges (top of channel sides) • 'I'lie spacing (ft.) _ (3 f % of ditch grade) X 100 ft. VI-16 March, 1993 z u ~ W o CL 0 J -J Q ? 0 U Q U u w C (r W V- F- > O LL LL CL 00 0 QQ mm J W 1- m u z J D: O J I- 1-Jaz cnozozz D:(nuoo wF- ?-.. CDZOW w Oz=D'O Dual-WCr - J d W az^1- " zo• awar- W--•m uom W- M-LL- w o o cr ZMOILLQ-wcn o w cn z cn Wh- aol-Oa ?-cnar_j -- ?- .j O ouazCnu z LL- -C-O-3 W a J d O z 0 a •u J a a 1J a O• z ?`. 0 z ? z w - /I) cn w 1 O> u u F- O I O 3 O W U-1 I > ;r ?._ z0 Wo I d a > I: W Q w 0 J lL m _ o - cn 0 w a a CL CD ? X11 ? ?- J I:m<? a z 0 .? o z? 20 J ? ?= W a _ -- cn O o o W CL I? i ZI 31 a cr• 7 C3 O?UJ; V)I Q.lol II R Z; o u a: MI r of ?I o w? a V1-17 March, 1993 ..• i a N ? -L om F I rfn m W U 2 U 1 'H O Re V 1 ?r Jo7 u xm:e CD Hu.U 0 .? Qom c W O -e A 2: F cr C) Q U7 a n M ? ROCK PIPE INLET PROTECTION: S 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. 'I'hey 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 VI-22 March, 1993 Q w a a s 0, J w W Z ?( u? J X m Z Ul O •-• F- O C )- w Z O --• Z Z m >- X n- o ?- . a D w m cn o ?- cn o a z z a w to z H- •-• o w a U O J w u o E w z m m m 0 m m a w N. O W O m W- m 0 m V) w (n LL .. V) O a m (n z to J Z a J U )-- O !- O N O a O z w Z -W J V) - LL a u • 2 u O Z V) O a a a a z J o (n O z in w m a o z" z z 0 X a v ii ° J w z F- V) W F- O W W Z '- w N CD (n --• Z) Q m Q N O- m a ?- O w ?-- 2 z •• m J J m- m O J W a w w X M w W W F- u J F- F- w J Z U F- -; W W F-V) azzzwa0m•--z0urw O W Z O 0 0 2 (- O m 0 U ?- 2 z m (n u ?- u (n (n w d u a O F- 0 z D 0 a c? 0 X a a j LL z , .w, a (L , (O , L ?Z? w Z O , H LO Q a cr O z ~ z O O z Cl- 0 r-1 OD o U N W , (n O 1- Z O to (n u z w E 0 w w w z z m O O N N w w 0 o a a m m 0 0 N z O O O Z4 O w n C a J LL tn W Ln c W2 C? r l VI-23 March, 1993 r v ROCK SILT SCREEN: (%%_ 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 die 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 stone Dam height - 1.5 ft. minimum and 3 ft. maximum ( shall not be higher than 1 ft. above normal flow of stream) VI-24 March, 1993 v to w a m m LL O a 0 w z FW z?°zF Q 4 wz O a?z Qx° vxi zFw0 F?(L w t- 0 00d¢wtn V'ow? c=.ac,. zw w2w ozmdW °w..a OOmOaw cxmtn x°'Q f- W- = G-. G, E.0 Z: W V) 0 F 0 p to d O Z w w A 00 -I a: @ xU d 0 d d Z u o w oH p ? oz re CZ Z UaOZ=`FQx V) f.wvwFOmWwzE-W :Dw> UZ-1mUF: and a 3vmo Co wHWF--Jp )Waz?UF-d-al.:F FEf) ZdzZ wdOx. Zed L1. O w0x00"3 xFOrO = w z mumuFV tnfnC o, u fn,Q t?. r L `` r 0 w o Z o _ LL O W m I W tn X T_ z ?. O 1rif , ?; `n o NIl L u z O o 0. -, V) v0 O W Z a ;• ° cn N ? Z O Z L) tl ic- ^ Pn O; V) 7 i V1-25 March, 1993 '. I Q16 01.1 l10 z w w ol? U U) a? ,-, 0 cCr Cf) ?xu ? xxxhh U a^" OV wOa 0" O W ?_ A Q E" O Q (I) O n n