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19950001 Ver 1_Complete File_19950106
State of North Carolina Department of Environment, Health and Natural Resources Division of Environmental Management James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary A. Preston Howard,'Jr., P.E., Director APPROVAL of 401 Water Quality Certification Mr. Trent Anderson NC DOT P.O. Box 1151 Andrews, N.C. 28901 Dear Mr. Anderson: A171FA 44 [D EHNR January 6, 1995 Macon County DEM Project # 95001 FILE COPY You have our approval to place fill material in 0.083 acres of wetlands or waters for the purpose of road maintenance at SR 1396, Ray Creek Road, as you described in your application dated 27 December 1994. 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 30 days of the date that you receive this letter. To ask fora 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 Environmental Management under Section 401 of the Clean Water Act. If you have any questions, please telephone John Domey at 919-733-1786. Attachment cc: Wilmington District Corps of Engineers Corps of Engineers Asheville Field Office Asheville DEM Regional Office Mr. John Domey Central Files Sincerely, Pe stop ar IT P. E. 95001.1tr P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-7015 FAX 919-733-2496 An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post-consumer paper P STATE OF NORTH CAROLINA DEPARTMENT OF TPANSPORTATION JAMES B. HUNT. )R GOVERNOR gMACON COUNTY SR 1396 DIVISION OF HIGHWAYS Andrews, N. C. 28901 Haber 2T, 1994 Mr. Bob Johnson U.S. Army Corps of Engineers Reg. Field Oiifce Rm. 75, Grove Arcade Buildinj 37 Battery Paris Avenue AshevNe, N. C. 28801-2714 Dear Mr. Johnson: ' ? Crt I 3 1995 v R. SAMUEL HUNT Ill SECRETARY The North Carolina Department of Transportation (NCDOT) is proposing to grade, drain, base, and pave Sit 1396, Ray Creole Road, primarily along the existing roadway. In order-to sorstrust this project In aeeordance with our current secondary road standards and due to the pray of a trout stream (Ray Branch and tributaries, DEN-Class C - Trout Water) and replacement of pipe culverts, we are requesting auhm under Section 404 of the Clean Water Act. i am sending a location map, dr@W-lhe diagram, plan-protite sheets, erosion control plans and detaf, and a U.&G.& map Indicating project area and location of proposed pipe culverts along On road. We propose to install the new culverts slightly below the existing streambed elevations where bedrock is not encountered to minimize impacts to wig habitat and also the existing stream gradients to remain as unchanged as Is physically possible. The best management practices will be used to minimize and control erosion and sedimentation on this project. The construction fireman will review all erosion control measures daily to ensure erosion and sedimentation are being effectively controlled. N the piaawai devices are not functioning as intended, they will Immediately be replaced with better devices. The rock sit screens and other erosion control devioes will be In place prior to pipe culvert construction and will remain In place m the project is stabilized. 1* ®p Of By copy of this letter t am askind Or. David Yaw, North Carolina Wildlife Resources Commission District 9 Environ tai C wrdnator, to comment directly to you concerning the 404 NMmrwd+e Permll Request. A request will be made on for a temporary encroachment in the Trout Stream Buffer Zone of Rey r and tributaries and I am asking Mr. Yew and Mr. Ed Ingle, Area Roadie Environmental Enghteer (NCDOT) to comment directly to me concerning a Trout Stream Buffer Zone Encroachment. Also, by copy of this letter, I acn ring authorization to proceed under Section 401 of the Clean Water Act from the Division of Environmental Management. We would like to begin as seen as possible. 9 further information Is required, please call me at (704) 321-4105. Your early review and consideration will be grey apprec ed• SiRCee?', W. Trent Andersen COY Maintenance Engineer WTA/rr Attachments cc: Mr. Richard Phillips, P. E., Rend Engineer (DEHNR) Mr. F. Dan Martin, P. E., Dkt*m Endineer Mr. Ed L Ingle, Area Roadside Environmental Engineer Mr. Eric Gafamb, Water Qudfty Certention URN (DEN) Mr. David Vow, District 9 . nme Coordinator (NCWRC) j DEM ID: ACTION ID: Nationwide Permit Requested (Provide Nationwide Permit *): Z (o JOINT FORM F Nationwide permits that require n tion to the Corps of Engineers Nationwide permits that require aiiitaeti for won 411 certification WILMINGTON DISTRICT ENGINEER WATER QUALM PLAN"M CORPS OF ENGINEERS 1 IVI$IflF ENVIOtONIANNTAL MANAGEMENT DEPARTMENT OF THE ARMY NC DEL%AI.NT O aNN FINT, HEALTH, P.O. Box 1890 AND NATURAL RESOURCES Wilmingtoet, NC 28402-1890 P.O. lm M35 ATTN: CESAW-CO-E W~, 111 276264533 Telephone (919) 251-4311 ONE (1) COPY OF THIS COMPLETED APKXA =$6 SWr TO THE CORPS OF ENGINEERS: SEVEN (7) COPIES SHOULD BE SENT TO Tim N.C. (V ENVIRONMENTAL MANAGEMENT. PLEASE PRINT. 1. Owners Name 0 C •..? C©t (O + net., tJe?-me a ?TC'a n 5?i? 2. owners Address: P SOY- 1 S51 Qndirgw-z. tC. Z&9o 1 3. Owners Phone Number (Home): (weat): (-704) 3 2-1- 4 10 5 4. If Applicable: Agent's name or responsible aor e ' a +as, O&ke amobw. W . -r rend kn .et?an, 5. Location of work (MUST ATTACH MAP). County: a cztN, Nearest Town or City: V:: nk V%Vx-- 1?iOt e.er ek.1 n0.,. Specific Location (Include road numbers, hgdrnarks, etc.): f R t 39 Q o Cceek Oac? 6. Name of Closest Stream/River: RQ at-Or< k- 7. River Basin: L;1-11e- ?enncSSe? 9,veC gdSir%-. 8. Is this project located in a watershed clash al , NQW, O NW, WS I, or WS II? YES NL NO [ ] 9. Have any Section 404 permits been previously reque d liar ttae on Ot qty? YES [ ] NO W- If yes, explain. 10. Estimated total number of acres of waters at &e U.S, bwhWft wedsook beated on project site: 11. Number of acres of waters of the U.S., incitift w , inV&tftd by the pmpond project: Filled: O, 0-75 AG. Wei_1ctnJs 0. Do78 Ac.. Cvl-ert% Flooded: Excavated: Total InTacted: O • ?$ 3 Ac.ceS ol SR 125 91o R AY CREE4{ Wv,?kli P,,, r. ; i J ! , ) J, Kra 1 +? i ? 7 i4 6-An pip, I to7lv TL V 31 JI BM LHT ICw HQ 071 MtSinai (:h STA - - ,.? "v ` ?-.;?. ? /i t` -_ •'? it i MOO- ?oS J y ??? _ t. £S?IT\ i J !B(4 (o6 1{{?? w. 71 ?= ?{ `? L l F r :•? J. / 111 ,- _ .-J t _ 1 1 1 - _ 1 y a 1396 S. R. .?Z2122_ x W. Os , ao URM I M2ROVEM LT • TO BE PAVED- PO L ES TO #, - T POLES TO B VF ' OLIN I OT Fl SCALE x x 2 _ 16 45• J o5-18-93 F x i. r P,f ?«+-- 4 . s STA. 1+25 TO STA. 1+75 R/V TO ISO XT MFW CL FOR 2614 Z 379 WILDING __ 00'f40 - ZONt tk? 574 oo-yo BeGIN TsD 3 oo+40 s F• Rg t n,00 0,M t Type "B" silt basin ( I STA. 00+40 00+40 s BEGIN TSF & RB 1 , BEGIN BUFFER ZONE S.R. 1392 5+00 1 ? ' STA. 4+50 END BUFFER ZONE 4+50 x m 1 ?' I 4+00 0 1 Tyype "A" silt - checks as required 3+50 1 1 3+00 i 1 T i ; 2+50 2+00 STA 1+25 TO STA. 1+75 Reduce R/W TO 18' RT OF NEW (L FOR 26' X 37' 1+50 1 ` STORE BUILDING . 1 1 1 1 1 1+00 5+00 4+50 4+00 3+50 3+00 2+50 2+00 1+50 } 1+00 00+50 00+40 Buf f er Zone Encroachment #1 S.R. 1396 (Ray Creek Rd.) Macon County, N.C. Scale: 1"=100' i ;.A:. 100-00 _ I 10 , 00 1 OF UJCTC.A+U D A=-1A S Y CanlsTP Q Fw 1 45 1 1 sr? S+?o`$ctrN ?3D uSFS $ x 3 Ix3.' is cw USFS X3 X 2 5B (2) (2) PL s 74430 3 7*W + PL 1 11 +o? e- N TS D 57A G+00 AND TSF s7* 6+ .50 END TS f ? I 00 5#00 Site 1 C) -ruu W Wis. . 4 tt T WCrLA,Vp AAA "rAKCW iw Co vsTQuc.-rsON 2000. SIB- ALR-f 10100 41, A*-?, Q Q • a k Eat m ?c d ' f E2) sru -;.3+so ?-ND T5 r sm B 52 Y (MUM MD. ? x 3X2 S FRA1 .2M, WC 28734 (3) (3) i 7 LL a • r s Q, LL i i T3? CoNStRLLC7T-0I? 'DSO StuA?e ?.-j" 2 t i a PL «» .» PL i ? X ? :$3i XZ 5B 20+-50 SF (2) Sz3'x2' SB ? (3) . i . I Tim %S#-So &-N o ire- (3) 1 14 sr 2.6t 5o 5 25+-50 ENO 7SA 75.cx? . I I T I If 1l 1 1 L. V Checkdoms as required 8'x3'x2' Silt Basin Rock silt screen 70 8'x3'x2' Silt Basin , 8'x3'x2' Silt Basin 8'x3'x2' Silt )Basin Checkdoms as required t Om 45a00 SOW FRANCIS LANIUS `. on mm So. 8 x3rx7,t 5g SIN, NC 23734 ISM 44+Z'7 $£GSN T sb r SM 44+-27 rNa 7z $? ` R i I 43+45 PL (3) (3) a ' x 5 40,10 c /J TF I ] -Sl* 40+00 ENA TtiD w A .-. ftACE WITH NEW 19-1 CHP 40+00 4o#oo 4 '- JI LC J J L V. - 1 I 1 L/ SB SCALE: 1"=50' SB / ith 36" x 80' CMP SB SB r2ock it 19 DRIVE screen (H) ? T "PLACE WITH NEW 15" CMP i p ,..,.,,,,.,,.;,...... ..?.-- 49+& • ,,,, _ ,'S4100 cVIS RAi lsl eOCURM agown IL $am Lot am= DRLLIMM y 4T a RM 151 CL US, M 28721 E. & CAMLU SOCNW 1 (7) RAT CRXKK Rai mumm", w 20734 a. t Q . It #* e t 55 55 *W A ROKAM 1!-# SAY CREW RD. #&JWJ.ZM, HC 28734 (9) • 57 340 r3gJ TS? _ [8-7- j7,< -Z S stir 1x2?SB 15 ST-A 53+20 fJVA 7 F .? - PL PI. MIL4e1 RONLMW 102 RAY CRM RD- U, l!C 28734 (R) (7) V 11 (9) 4 t 55+00 A S64 S4*SD $EGz'N P.WFFM ZONE yr C NP (. /Z 1 f JAMS C. RWAJAND ? 65+00 124 an CUM Im. TUMMIK, MC 28734 , {12) PL PL :5M 34- 90 Btu EGP- 8'x3 2?s8 ?. .. ,,. .,. •. Gat 70 NA ?'sF (0 3+ SO COV (11? r S77} & o+oo MEC-N Rgo- I 60+00 \ \ 63+00 End Buffer zone 63+00 62+50 Type "A" Rock Silt Check 62+00 Type "B" check dams C 75' O.C. 61+50 Type "A" 61+00 Rock Silt Check 60+50 Type "A" / Silt basin ?y 60+00 59+50 59+00 I O 58+50 58+00 57+50 \ \ IjF .tSFD 57+00 Type "A" Silt basin 56+50 Stream ford TSF Private / 56+50 rc?d Begin buffer zone (Graveled)/ I 63+00 62+50 62+00 61+50 61+00 60+50 60+00 59+50 59+00 58+50 58+00 57+50 57+00 56+50 Buffer Zone Encroachment #2 S.R. 1396 (Ray Creek Rd.) Macon County, N.C. Scale: 1"=100' ??»:, Y&um F. RONLAM I" LAM nmDR• FRAMix, xC 2873,4 (13) A 70+00 i PL 67+6 s (12) (13) i : 8&. P+7s TO STA. 68+IO MMM R/W TO 16' RT. NEW % 63+l?S P. ...q/? 7 (12) NOTE: SHFD TO NE 140V60? 5 ? (Tt} 65f,00 E.O.Q._ 75+00 E.O.P. 5174 75+0o EN ?K S - - - Z"C aq DES NICNAIL ROM jt! R.L. ROM 155 NAY CNBBSi. RD. 215 WINUY GAP BD. FRANKLIN, !c 28734 FRANKLIN, NC 28734 45* (17) (16) u : S TO B!6 i PL 73+40 a[ ' IKYM Z. & LINK U. BA#IS• WT. 5 BOX "I ? YMYTN, GA. 31029 • '_' (14) Pl .: 72*00 ^w 4um G IB 1 SMASHl9W rte. momm", s+c "2" w gX3?x'Z.? s8 (IS) AW-A -o- PL 771 P_ L 0 o° (13) rrp (13) J o Q 70 Of) 7(t t)t1 I T Jite 4 J LU. / ITU.J 8'x3'x2' Silt basin t 'x3'x2' Silt basin L/ r I I'?I Rock silt screen S } 75+00 End T5F & RB End Buffer Zwo 75+00 75+00 'jry 74+50 74+50 7++00 Ray Creek 74+00 it i 73+50 ` 73+50 ti 73+40 73+00 t ( \ 72+50 ' Temp. Sit Farce and Rack tom TI r Begin Buffer Zone 72+50 f \ 72+50 Buffer Zone Encroachment #3 S.R. 136 (Ray Meek Road) Not to scale .......... :. . 4: :.:.......:...:...... :.:.......... . .. .... _:....::: ...... ...................... . . ::.r^?s, :............ . ' : :::::: ::::::::.:..:....::::::::... ..... . o %-: jo: . ......... . o :.:.::.:: [1' . ' ........ . }:. .. ............... . .... ... ....... ...... .:....... :[-: : ........:.:...........:.:.:.........:........... :...... ...... :.. .. ..... ... . . .. . . .>: : : :: : :: IV :'. ................................................. .............. ............................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..:: . . . . . . . . . . . . ... ......... ... ... .................. .. ... ... . .. ....... ..?:??. . 4 .' 2245. ?f+'?r .NN..«..«.N.«s....r...... .rr....??. 24&06 i r 093.01 g _ ? 11IriIMN.'Y1NM11.gIM ? •_ 890.Eato? Shp OWn vAh ? T 245.01. SO 80006' A 246.02 SO 9MdA W&IO 892.04 • Xay. S ..N».... 897.01 A j/ III...NN. W?"g?'.Y'• 11111111* a dpi.«M •.N.MM.. s...ars.rr awrrrrl. rw1..1... 24&0+4 $AV 806% PAN* k" pleadbm Y 896.01 Tj .....,.....1««..N...NM..1. -on -A maleft 846 oe Two 9 ......N.... ................ ?. Y. -B) 896.08 Type C .............................. ,. OR .. G 12 marck, I m .t 1 TEEMPOPAR EPO ION CONTPOL S Y-MB6 cP srorvE D/TCH CC T ECKDAM POCK. S/LTr -..,? ?7Y SILT 8AS11V- 8 TEMP SLOPE DPAI .w TCMP SILT DITCH TAD E'A R -TiY -EM B, /V?C # V T --?- -- - /LT -?- FEN CL- ---{?- r mp S1"F?1:-1-jm C/i?dSS//VC BERGLASS ROVING -?--- 1= G R x Proposed Road ..................... Existing Road ...................... Railroad ........................... ___--- Controf of :\cc??ss Li,:0:.......... .... A Slope Stake Line .................... ---t=--- Bridge ............................. Culver ............................ ????•aC•?? -....._.-...-- oods ............................. Telephone or TOl,:gra[)h 1`01C ......... .l:.rt}?+. -+? , •??u?l? •U• ! Tower Pole and Line ................. Power Pole ......................... ap:? t:?•. ? ?tt'f{c1?• ? ! Easement- Line ...................... Mt)iv t i1 a Limit ....................... '`?..._--?-'"'.?-?--?- • ?.,\ Guard Rail ......................... Sanitary Se%,'er Ltne ................. -- Water Line ......................... Gas Line ....- ............ . ........ • f.?.e.???????:u t•.xts Chain Link Fence ........ • ....... ' . . Woven Wire Fence .................. -•0------et?- a •ratioll .................. t - ?--? Reforestation ....................... Tempor;irv Silt Ditch .............. . 'T'emporary' Silt Fence ................ Temporary Slope Drain .............. Brush Barri(n ........................ Silt Check Dam Type A ............... Silt Check Dam Type B ................ Silt Basin 'I`ype .................... ? S it c Basin T ,,p e f3 .......... Rock Si:t Check Dam ................. . zt ll? (3c! m 7ettir?, Stone Ditch Chec'• .t V TEMPORARY SILT DITCH: 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 aliment 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. - TSD VI 2 March, 1993 4 13 VI-3 March, 1993 s ` AS TEwoRARY 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 III 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 Fabric Steel posts length Post spacing With Wife Without Wire Type 3 Class A Type 3 Class B 5 ft 5 ft. 10 ft. 6 ft. maximum VI-6 March, 1993 < I- ' w w _ p Cr 3 3 H = 3S x Q 3 ?a m S W ?z S J W U Q O N Q W OJ o= N i Z QZ S? F- N W S O O a H O F- O m m 0 Co Q J J C :r F- LO w S_ 3 LL 0 a z m n II +141 h a a w ai °D i0 Z ---IfI ? w mm = C)U = Lli ?--- ------- W - --------- LL S + O F- -------- --------- --'Z O O ?- W < c;? U z z ?-- °° --? F- W J I Cr W 3 LL m p 11 I I J 044 W w - I I I ea Cr? 3 -a ? 0 III- >- uov WWz - ' O I I X Q ? px LA- a 0 O a?,C7 Ooa CL z W 0? p Q 0 ~ Ltl ? M C z w Q Z LL '?? 3 z g ,, a S z O Z O ? C L,, W m am LL L .? Q D 0 m -J IX W If') L -J G j F- `WN J0W 4C W N (A CO w J ,~? a 3 J Z J Q X W _j W Z F- _j Q WStn V) Q Q H u S LL. O W J W a f- z Z CIO (n W O N - S p F- Se W S ~ N W a G C" GC C) 00 0 0 w M m 4x ?o 2 Q a 3 IT p d Z w NO p Z W o O W =Z cr Z0p J W W Q NCL Z ? a p f- O J Z ? J tD W U W = p W O th ? ? >% 3 3 U Q w Cr - 0 3 p C14 w N Z Li -0 J a Li -a ) 0 LL0 ( i a z w z m VI-7 U_ S m Q LL Cr W H J March, 1993 A 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. 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) 3?h js'l VI-12 March, 1993 4. 0 A, J d c S s a 11 II ij? ? ???il! m lilll. IIIII ?' 1= -? '11111 i1lf ii o IIIII ? ? a IA ?11l) W _ W 11111 Hill 11 I J 11111 ? 1!111 -;, 1111111= Hid a Till; ? Illli $ IIIII a !fill z V I ?' m w r? ~ z Z p? m ?' az (TTT W CC w?- O `eQ Q? VI-13 March, 1993 m ?$ m A, I ` TEMPORARY RocK SILT CHECK Ty-B: )OP. 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. DESIGN CRITERIA: • Center of rock silt check shall be at least 1 foot louver than the outer edges (top of channel sides) • The spacing (ft.) _ (3 / % of ditch grade) X 100 ft. VI 16 March, 1993 t ? t, li. v F- W o n- 0 J -? (n Cl U = O ?- U F- a O O CC w LL > o LL LL CL O O 0 F- ItJ I i I i? z 1-1 3 w Z a J a_ z o= UF- Lj? (n O N W (n W O > Cr U J z 3 W IJ ? = Z O W J w J w a CL m ''1 1u H F- J J ? Q z O F- 1\? O u r Z 0O UQ N O 0 N CD LlJ d. %T U VI-17 S U F- m n u w <E Z -j CC Q O J F- 0 00=OZZ o CC cnUO0 N W W F- F- ?- Q 0 m O O = --•{ Z Cr 1 JUaF-Wfr. F- a'W - i - QZ- I- =o• aW(t- o (n -m 0 O m w o o cr Zx(nuLaw(n m Ow(n z(n WF- ao?-Oa F- W X J -- f- J O oUazou Z LL -- a 0 - - Mar+ch,1993 r Oim oI? E- T v,i m m W CL U W U U ?x O F? CC 00 :4 Q O7? Q ?Q W F- Cr_ Q 0 Q F- cn O a n k. t. 0 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: ?A • 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 i S Q w 7 0- 0- 7t O? S J W \ LL z Q? ucnmu?-Jima a.JZa-o Cr CV) a xwz o?'OZZ ? >- W Q a U 0? J Z W U O Z W Z S- Cr m 0Cr. m a W N ? O Z O L.L a W? O J? N- ? W? N O D H O N O? Q O Z a J W Q N a Z W J U 0 ? U ?9 2 ? (?A W mmaoWU?-z w ?-ow w O Z -- Z Q S :r N •-+ J W Z ?- N W 1- O W W 2 f- W N O N •-• oa acno - ?- ow?aa - ocJJ:r aoJwawaxamw W I.- U J M- F- W J Z U ?- •-• W W 1-N azzzNaooc--zoUxw o w=ooo x?- oxo u F--= Z m V) U H U N (!'1 U. d. U a 0 F- Z O O a o x a z w, :Z a ., ?m? ?w? ?z? z o ' ' N J -a Z ? Q ? J a z L1. N i i? a 2 W O Z N d N w w 0 0 a a O O N vj O Z J w w a 0 W N 0 o U W N J O :r z 0 U H Z W S W N Co a v, s w z C ? Q^. i fiO LLI ir E^ H W I- O Q. 2 Z ? OQW zz? Y 07, U O ?o u'. Q Q H h VI-23 March, 1993 r ? RocK SELT 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 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 stone • Dam height - 1.5 ft. mininn and 3 ft maximum ( shall not be higher than 1 ft. above normal flow of stream) VI-24 Match, 1993 -ass~: v a r l s? 3 W_ > a. O m a 0 r W .. z .? x z AZ ?d x AE-WZ o,?doZ C= V1 :it Z E? cL O E- n. W E- od<swin ?owv ?.Z?. za,-aur° ozwaw . °w-2 OOMOWW xx xV) =aa ?W' way zo-Jz aWa 0 00d0ZwWQp a w L-. U doddz ?'0W E°..00°oz rxc?r?aowZ W E- Z U Z OXD:V1:£ W E- W v W E-OMW W ZE-W nW> UZaWUE-: (?d ?y..72W 0 ? Cq ??aac???q..aWdwa>Cad= WE-V)E-.JE- M(st'?z E--U) zdzZdU)dpZMdE 0. O 140=00 =E-o0 =w z WUMUE-V MWE't3.5 w-,A :L Cl 6 a 0 r 3 W z f H <O z 0 LL X CO w z 0 V) Z o a ir ~ L) (D, O ?., ¢ :rf +? r Z a W N w %i ?c f Q zl z W U U (1) ar I-? O G @ r Co UZ C? ? F2 U Oz rT- V.0 om O W? L._I_ Q E^ O Q CIO a I i -6 w; a E z. ? n VI-25 March, 1993 4 ! PIPE OUTLET ENERGY DIssiPATOR: 00 i4k A pipe outlet energy dissipator shall be used at pipe outlets to slow the water velocities when it exits the pipe and flows out ditched or natural waterways. It is an apron of stone of a sufficient thickness to protect the outlet area from scouring out and causing off-site sedimentation damage. Pipe outlet energy dissipators should be built according to the guideline chart shown on page VIII-3 of this manual. AREAS OF USE: • Outlets of pipes and culverts to prevent scouring. DESIGN CRI'T'ERIA: • In accordance with chart on gage VIN-3. • Filter fabric, or six inch layer of gravel, shall be used under stone. MATERIALS : • Filter fabric shall meet requirements of section 1056 of Standard Specifications for Roads and Structures, January 1, 1990, for type II filter fabric. Al VI-34 March, 1993 ,. 1.. Yak: 4y? 1. fi 0 w V' s{ 5 ? 0 M CO Co- O Cc -0 W o c Q. m a a A = (!1 00 m?: o ' •- a Z V) L. O W O w ' u-,L - ?I W ? ? }J n CL C C ?' o o :. w w o° o Cd cis m CL --f c - -? W w H H o O w 6 ° a c Cd q 3 Cd a3Q? • VI-35 March, 1993