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HomeMy WebLinkAbout19990556 Ver 1_Complete File_19990525State of North Carolina Department of Environment and Natural Resources Division of Water Quality James B. Hunt, Jr., Govemor Wayne McDevitt, Secretary Kerr T. Stevens, Director 1 LF!?F'A • '6 A NCDENR NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES June 15, 1999 Haywood County DWQ Project # 990556 APPROVAL of 401 Water Quality Certification C.R. Styles NC DOT PO Box 250 Bryson City, NC 28713 Dear Mr. Styles: You have our approval, in accordance with the attached conditions, for the purpose of improving SR 1621, as you described in your application dated May 25, 1999. After reviewing your application, we have decided that this fill is covered by General Water Quality Certification Number 3103. This Certification allows you to use Nationwide Permit Number 14 when the Corps of Engineers issues it. 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. Also this approval will expire when the accompanying 404 or CAMA permit expires unless otherwise specified in the General Certification. 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 send us a new application. If the property is sold, the new owner must be given a copy of this Certification and approval letter and is thereby responsible for complying with all conditions. 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 2H .0506 (h). For this approval to be valid, you must follow the conditions listed in the attached certification. This approval shall expire when the corresponding Nationwide Permit expires or as otherwise provided 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 b0.days of the date that you receive this letter. To ask for a hearing, send a written petition which conforms to Chapte% 136B of the North Carolina General Statutes to the Office of Administrative Hearings, P.O. Box 27447, Raleigh, N.C: i161 1-*- 7- This certification and its conditions are final and binding unless you ask for a hearing. ..-This Iet[ert ompletes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any±fions please telephone John Domey at 919-733-1786. Sincerely, 0.e tevens Attachment cc: Wilmington District Corps of Engineers Corps of Engineers Asheville Feld Office Ashevi4e DWQ Regional,Office Mr. Johia Domey Central Files :. 990556.1tr a 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 Aor STATE OF NORTH CAROLINA DEPARTMENT OF TRANSPORTATION J ?tt . 7?' BHUNT JR. E. NORRIS TOLSON SECRETARY May 17, 1999 JaF .Y ?J 162 1 ??1 s °MrBo J son 21sArAmy ores of Engineer Reg. Fiefd Office - Room 75, Grove Park Ave. Asheville, NC 28801-2714 Dear Mr. Johnson: The North Carolina Department of Transportation is proposing to grade, drain, base and pave primarily along the existing roadway of SR 1621, West Cove Road in Haywood County. In order to construct this project in accordance with our current secondary road standards and-.due to replacement and extension of one (1) pipe culvert in West Cove Branch, we are requesting, authorization under Section 404 of the Clean Water Act. This permit request is fora pipe.extensjon that was inadvertently left off of our permit request dated February 26,1999 (Action 1d. 199930542). I am sending a straight-line diagram with our proposed erosion control and construction limits at,various sites along this project. In addition, a typical section of the road, drawings for the pipe replacement in West Cove Branch, general notes and standards on erosion control.measures, and a marked County Map are enclosed. We propose to install the new culvert slightly below the existing stream bed elevation where bedrock is not encountered to minimize impact to Wildlife habitat and allow the existing stream gradient to remain as unchanged as physically possible. The best,manggement 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 controls are being effectively controlled. If the planned devices are not functioning as intended, they will immediately be replaced with better devices. The silt fences and other erosion control devices will be in place prior to pipe construction and will remain in place until the project is stabilized. P.O. Box 250, Bryson City, NC 28713 Phone (828) 488-2131 SFr. Bob Johnson Page 2 May 1.;1999 By copy of this letter I am asking Mr. Mark Davis, Habitat Coordinator Western Mountain District, of the NCWRC 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 Clear Water Act from Division of Water Quality. In addition, I am asking Mr. Davis and Mr. Ed Ingle, Area Roadside Environmental Engineer (NCDOT), and Mr. Richard Phillips (DENR), to comment directly to me concerning this permit request. We would like to begin construction as soon as possible. If further information is required, please advise. Your early review and consideration will be appreciated. Your ruly, C. . S les, P. E. Distric ngineer CRS:sd atta. ce: ,Mr. Richard Phillips, P. E., Regional Engineer DENR 'Mr:,F. D. Martin, P. E., Division Engineer Mr. E. L. Ingle, Area Roadside Environmental Engineer Mr. John Dorney, Division of Water Quality, DENR Mr. Mark Davis,, Habitat Coordinator W. Mtn. Dist., NCWRC P.O. Box 250, Bryson City, NC 28713 Phone (828) 488-2131 DWQ ID: CORPS ACTION ID: ,.. ,.:, NATIONWIDE PERMIT REQUESTED (PROVIDE NA'T'IONWIDE PERMIT #} ? 7 - P -CONSTRUCT?O ?t 'T?'I+C?i:T?GN r??PPL CATIO ?a .=:h . • - FOR NATIONWIDE PERMITS THAT REQUIRE: 1. NOTIFICATION TO THE CORPS OF ENGINEERS 2. APPLICATION FOR SECTION 401 CERTIFICATION 3. COORDINATION WITH THE NC DIVISION OF COASTAL MANAGEMENT SEND THE ORIGINAL AND (1) COPY OF THIS COMPLETED FORM TO THE APPROPRIATE FIELD OFFICE OF THE CORPS OF ENGINEERS (SEE AGENCY ADDRESSES SHEET). SEVEN (7) COPIES MUST BE SENT TO THE NC DIVISION OF WATER QUALITY, ATTN: JOHN DORNEY, 4401 REEDY CREEK ROAD, RALEIGH, NC 27607. PLEASE PRINT. is OWNER'S NAME: NC DOT - District Engineer: C. R. Styles, P. E. 2. MAILING ADDRESS: P.O. Drawr 250 SUBDIVISION NAME: N/A CITY. Bryson City STATE: NC ZIP CODE: 28713 PROJECT LOCATION ADDRESS, INCLUDING SUBDIVISION NAME (IF DIFFERENT FROM MAILING ADDRESS ABOVE): 3. TELEPHONE NUMBER: (HOME) (WORK) (828) 488-2131 4. IF APPLICABLE: AGENT'S NAME OR RESPONSIBLE CORPORATE OFFICIAL, ADDRESS, PHONE NUMBER: Sarre as above # 1 5. LOCATION OP WORK (PROVIDE A MAP, PREFERABLY A COPY OF USGS TOPOGRAPHIC MAP OR AERIA L PHOTOGRAPHY WITH SCALE): COUNTY: y a c NEAREST TOWN OR CITY: c ck-c\46 r, l J SPECIFIC LOCATION (INCLUDE ROAD NUMBERS, LANDMARKS, ECT.) ,P L- G? / - r ? j Q, ` 4 f?G' c L y 6. IMPACTED OR NEAREST STREAM/RIVER? I CC) V, Q ??CYAn Yl ?t I C A e) RIVER BASIN: F-Zg ? C h E'p -- pp P I V R:. 2 5 c- /.-j 1 7. (a) IS PROJECT LOCATED NEAR WATER CLASSIFIED AS TROUT, TIDAL SALTWATER, (SA), HIGH QUALITY WATERS (HQW), OUTSTANDING RESOURCE WATERS (ORW), WATER SUPPLY (WS-I OR WS-In? YES NO' IF YES, EXPLAIN: - (b) IS THE PROJECT LOCATED WITHIN A NORTH CAROLINA DIVISION OF COASTAL MANAGEMENT AREA OF ENVIRONMENTAL CONCERN (AEC)? YES C3 NON [c] IF THE PROJECT IS LOCATED WITHIN A COASTAL COUNTY (SEE PAGE 7 FOR LIST OF COASTAL COUNTIES), WHAT IS THE LAND USE PLAN (LUP) DESIGNATION? _ Na 8. (a) HAVE ANY SECTION 404 PERMITS BEEN PREVIOUSLY REQUESTED FOR USE ON THIS PROJECT? YESX NO ? IF YES, PROVIDE ACTION I.D. NUMBER OF PREVIOUS PERMIT AND ANY ITIONAL INFORMATIO (INSUDE PHOT?QCOPY OF 401 CERTIFICATION): 19 61CI3 n 5 LIZ r; r r c_-, 0, F (40 / v1 o,,.4 /,t44G.f L (b) ARE ADDITIONAL PERMIT REQUESTS EXPECTED FOR THIS PROPERTY IN THE ' FUTURE? YES C NO X IF YES, DESCRIBE ANTICIPATED WORK: 9. (a) ESTIMATED TOTAL NUMBERS OF ACRES IN TRACT OF LAW: 67 r`<<=- (b) ESTIMATED TOTAL NUMBER OF ACRES OF WETLANDS LOCATED Oh3 PROTECT SITE AU ??_I to. (a) NUMBER OF ACRES OF WETLANDS IMPACTED BY THE PROPOSED PROJECT BY: FILLING: EXCAVATION: FLOODING: DRAINAGE : OTHER: TOTAL ACRES TO BE IMPACTED= (b) (1) STREAM CHANNEL TO BE IMPACTED BY THE PROPOSED PROJECT (IF RELOCATED, PROVIDE DISTANCE BOTH BEFORE AND AFTER RELOCATION: LhNU 1171 Bhf OKE: FT AFTER: FT WIDTH BEFORE (based on normal high water contours): FT WIDTH AFTER: FT AVERAGE DEPTH BEFORE: 2 FT AFTER: FT (b) (2) STREAM CHANNEL IMPACTS WILL RESULT FROM: (CHECK ALL THAT /APPLY) PLAGEMEh.i OF PIPEN CHANNEL: (G C L .. .. _° ? ?:OPEN°GHANNEE;, RELOCATION. ' CHANNEL EXCAVATION: CONSTRUCTION OF A DAMIFLOODING: OTHER: 11. IF CONSTRUCTION OF A POND IS PROPOSED, WHAT IS THE SIZE OF THE WATERSHED DRAINING TO THE POND? N/A WHAT IS THE EXPECTED POND SURFACE AREA? N/A CAL 12. DESCRIPTION OF PROPOSED WORK INCLUDING DISCUSSION OF TYPE OF MECHANI EQUIPMENT TO BE USED? (ATTACH PLANS: 8 '/2" BY 11" DRAWINGS ONLY): To widen and pave SR to meet current WMT Standards by use of track hoes, ' bulldozers, duiTp trucks, back hoes, manual labor, etc. 13. PURPOSE OF PROPOSED WORK: Sane as above i n # 12 14. STATE REASONS WHY IT IS BELIEVED THAT THIS ACTIVITY MUST BE CARRIED OUT IN WETLANDS (INCLUDE ANY MEASURES TAKEN TO MINIMIZE WETLAND IMPACTS) To gain: the. needed width to build SR to NCDDT Standards. AlI Channel changes will be constructed in the dry. Rip rap will only be used for bank stabilization Alders, Red Maples, Blacik Waln ,_Willows Svcagpre Dornaoods etc will be re-established on the banks. All pipe replacem`nU will be placed slightly below the existing streanbed gradient so natural sihstrate can he rp--Pstahlished - 15. YOU ARE REQUIRED TO CONTACT THE US FISH AND WILDLIFE SERVICE AND/OR NATIONAL MARINE FISHERIES SERVICE REGARDING THE PRESENCE OF ANY FEDERALLY LISTED OR PROPOSED FOR LISTING ENDANGERED OR THREATENED SPECIES OR CRITICAL HABITAT IN THE PERMIT AREA THAT MAY BE AFFECTED BY THE PROPOSED PROJECT. DATE CONTACTED: Handled by Corps 16. YOU ARE REQUIRED TO CONTACT THE STATE HISTORIC PRESERVATION OFFICER (SHPO) REGARDING THE PRESENCE OF HISTORIC PROPERTIES IN THE PERMIT AREA WHICH MAY BE AFFECTED BY THE PROPOSED PROJECT. DATE CONTACTED: Handl ed by Corps 17. DOES'THE PROJECT INVOLVE AN E32ENPITURE OF PUBLIC FUNDS OT THE USE OF PUBLIC (STATE) LAND? YES x NO ? (IF NO, GO TO 18) 3 (a) IF YES, DOES THE PROJECT REQUIRE PREPARATION OF AN ENVIRONMENTAL DOC'MENT PURSUANT TO THE REQUIREMENTS OF THE NORTH CAROLINA ENVIRONMNTAL POLICY ACT? YES NO ; G (b) IF YES, HAS THE DOCUMENT BEEN REVIEWED TI3ROUGH THE NORTH' CAROLINA DEPARTMENT OF ADMINISTRATION STATE CLEARINGHOUSE YES C) NO ? N/A IF ANSWER 17b IS YES, THEN SUBMIT APPROPRIATE DOCUMENTATION FROM. THE STATE CLEARINGHOUSE WITH THE NORTH CAROLINA ENVIRONMENTAL POLICY ACT. QUESTIONS REGARDING THE STATE CLEARINGHOUSE REVIEW PROCESS SHOULD BE DIRECTED TO MS. CHRYS BAGGETT, DIRECTOR STATE CLEARINGHOUSE, NORTH CAROLINA DEPARTMENT OF ADMINISTRATION, 116 WEST JONES STREET, RALEIGH, NORTH CAROLINA 27603-8003, TELEPHONE (919) 733-6369. 18. THE FOLLOWING ITEMS SHOULD BE INCLUDED WITH THIS APPLICATION IF PROPOSED' ACTIVITY INVOLVES THE DISCHARGE OF EXCAVATED OF FILL MATERIAL INTO WETLANDS: (a) WETLAND DELINEATION MAP SHOWING ALL WETLANDS, STREAMS, LAKES, AND PONDS ON THE PROPERTY (FOR NATIONWIDE PERMIT NUMBERS 14, 18, 21, 26, 29, AND 38). ALL STREAM (INTERMITTENT AND PERMANENT) ON THE PROPERTY MUST BE SHOWN ON THE MAP. MAP SCALES SHOULD BE 1 INCH EQUALS 50 FEET OF 1 INCH EQUALS 100 FEET OF THEIR EQUIVALENT. (b) IF AVAILABLE, REPRESENTATIVE PHOTOGRAPH OF WETLANDS TO BE IMPACTED BY PRODUCT. [c] IF DELINEATION WAS PERFORMED BY A CONSULTANT, INCLUDE ALL DATA SHEETS RELEVANT TO THE PLACEMENT OF THE DELINEATION LINE. (d) ATTACH A COPY OF THE STORMWATER MANAGEMENT PLAN IF REQUIRED: (e) WHAT IS LAND USE OF SURROUNDING PROPERTY? Rura 1 ?+xxuil anti Raci denti a 1 i. (f) IF APPLICABLE, WHAT IS PROPOSED METHOD OF SEWAGE DISPOSAL?. N/A (g) SIGNED AND DATED AGENT AUTHORIZATION LETTER, IF APPLICABLE. NOTE: WETLANDS OR WATERS OF THE US MAY NOT BE IMPACTED PRIOR TO: 1. ISSUANCE OF A SECTION 404 CORPS OF ENGINEERS PERMIT, 2. EITHER THE ISSUANCE OR WAIVER OF A 401 DIVISION OF WATER QUALITY CERTIFICATION, AND 3. (IN THE TWENTY COASTAL COUNTIES ONLY), A LETTER FROM THE NORTH CAROLINA DIVISION OF COASTAL MANAGEMENT STATING THE PROPOSED ACTIVITY IS CONSISTENT WITH THE NORTH CAROLINA COASTAL MANAGEMENT PRAM- OWNER'Sl (AGENT'S SIGNATURE VALID ONLY IF AUTHORIZATION LETTER FROM ATE 4 State of North Carolina Department of- Environment and Natural Resources Division of Water Quality vj James 13 Hunt, Jr., Governor Wayne McDevitt, Secretary Kerr T. Stevens, Director APPROVAL of 401 Water Quality Certification 4 0• HCDEN,R NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES p. ?f (' '...l ,,April 23 999 ,?, ! • All ?._ Hhyvirriod Cunt DWQ Project # 565 APR ? . -?? Mr. C.R. Styles N.C. DOT U ! , 1'.0. Drawer 250 c?A? ? • r Bryson City, N.C. 28713 Li % • ?. t `12 Dear Mr. Styles: You have our approval, in accordance iVitlt,t attached conditions, to place fill material in 0.0033 acres of wetlands or waters for the purpose of improving S '16311 is you described in your application dated 1 April 1999. After reviewing your application, we have decided that this fill is covered by General Water Quality Certification Number 3108. This Certification allows you to use Nationwide Permit Number 26 when the Corps of Engineers issues it. In addition, you should get any other federal, state or local permits before you go ahead with your project including (but not limited tot Sediment and Erosion Control, Coastal Stormwater, Non-Discharge and Water Supply Watershed regulations. Also this approval will expire when the accompanying 404 or CAMA permit expires unless otherwise specified in the General Certification. 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 send us a new application. If the property is sold, the new owner must be given a copy of this Certification and approval letter and is thereby responsible for complying with all conditions. If total wetland fills for tf? project (now or in the future) exceed one acre, compensatory mitigation may be required as described in 15A NCAC 2H .050600'. For this approval to be valid, you must follow the conditions listed in the attached certification. This S ` appravht.shall expire when the corresponding Nationwide Permit expires or as otherwise provided in the General Certi rifttion. If Ydu,do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must act wiNin 60 days of the date that you receive this letter. To ask for a hearing, send a written petition which conforms to Chapter 15013 of the North Carolina General Statutes to the Office ol'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 Domey at 919-733-1786. Sincerely, P'r . Stevens Attachment cc: Wilmington District Corps of Engineers Corps of Engineers,.sheville Field Office Asheville DW04ional Office Mr. John: Dorney Central Files 990365.1tr 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 ti r ZQ? i0 NOT SPRINGS EEEVE5.895 i•''- 9 _ _ ATN. or ?. ti At F C 1 `•t !ABTREE BALD ELEV. 5.680 '1 G - -??. ` I? p 'fi 1 ? t G •2 1705 / .BEAV? DAM e GAP r .i ? X703 15116. - - 1 - y Ml -? s ?.; .1707 ..,?•-""'°....•+. yp BIC BUTT W MTN. '505 ?` usf . 2 / _? ? 1519 ?? vENFOUNO C+P 615. 507 ?• ?f. 17W. ++f ' J?Y 1505 100. 1.5 IW9 ?1 Isls 15I• ? / '517 `. / yS. ;R.SSY . 'If F ? p - '1 r 1 . ! j rw• .217-, ; 1 7J ?- WAYNESVILLE • 'OP. •aa P EN MT WOLF ' 1 x I. CU8LE ._ .. •:. O rl \ G x.' 1907 if Z -'ess ` woI 1 ?97? 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Woods ..: f.......•f• f•• t •+? •+ 'I'eleplioze oI.1'alegrupli Polc .......... ?I:ZI I• -o- , It'ttoi' 4 1 Tower Pole and Line... ....._ .., f , .. -? t Dower Pole.:..'..'.?.. ......:........ at:?IS'a' S + It'not' b 1 Easamen-I Lime..:.:...:..... • .......' r?'\ Sanitary;-.$ewer;-Une.:: f ....... • ....... --~-=s ---x.--55 • ..:....... • ..... --? >- t- aver Line..' Gas Line .•_... :..'... • ..•........ f . : M. ..: • _C Gas -0-- J'1tUt'USJ?:U f?YIS'J'1?'G Chain Lint. Fence ..:. • .............. -f2 ------ iff- -?---0- Vy.roven ;dire Fcncc":.................. Tdnll)0L L11., S4.t 0IEc11 • • • • • . . • . • • • • • • sri tlJn Te n1 P 0 I':t t'V .5 ?1 c .l' e N t: L' _'? "--^t•i s----? ? ''.. S Ternporary.Slope `Dnaii' ?• .:.......• ..... a Siic Checlc Dam lype A.:.. . ... . . ..f.: .•' n Silc Check Dam 1ype. B ........ a ... . Sdc liasin Type $`... ............... .Ro^kSilcCheck D,am. • 1 ?crn1 .. raMP. Stone Ditch `Check :...: • . 0 f ' t Woo L11.d1C FE'E7 /'?/Z /?L? ? EVE.ey S7D.E/r? E-v,6-A17' Aw-V Ei?iV6-I? vuT Lv?4'E?? /SA? _,vd r 7'd s cn r E .x?iS7i?PQF_..v ARF_A S /?:, L /_ EXGTiS? of 11?STUfcIjEy A•FEA O (./-3 - 14- OF? E S / Z. 7' ,' /1 _::'/ n( - 3 (S. f?. 2 8) LE?vGr:U e% J?isTiit'BED AREA yt E Q Y LErG?%/ o.F »is?'veBED //REA? ? ?foo ow- r??sr /.322 w???o vE ?c1 Ctrs i??G 102??0 ?I f Go too 0 .L 111. lN\ -BAS'IN' B i - TSD- :=- EGA TENIPMARY SILT FENCE: ti- , _ ' := tlt fence: is commonly..,;used at,the toe of a fill sectiothnethoe t off A terr?pox?,s ?le=1teF fabr?c_be? a of pergne ?tation It is made site sne reW'hi ster_ posts. The silt fence reduces the water fio cte le stretched and supported by also be used to divert water flow to prot there retaining the sediment. They may Silt fences need to be checked after each significant lances shalensure outlets . e effectiveness. They must be maintained on a regular basis. Si 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: wi out Wire Material With Wire Type 3 Class A Type 3 Class B Fabric 5 ft. ,Steel posts length 5 ft to t 6 ft. maximum post spacing 17 March, 1992 5: ?. ? .. L:A. };: . ??-. L. I? r?1 - ter' . cT" :.?? V U ?_ m _ O E --- I zo z. c?3 Lr. ` o i I ? r i I?- cn C s d G] Cs] C'I ` W C^Z Z_ ? N <- 77 - < 7-: n _ dwd00.. C 'n C,1 U E- C- N Cz7 F C=C E- 6a3 ?36Q?CCa1 _ CL.Zw W Z '3 c E- cn ` Z C _ W W G3 C.3E-ca G1C3?OU?P7FCs7E-C7 V d z c +- to - d- r?z Z _Ctn OG-C ?Q 18 0 Z. r m U U i lr J ? C ?E cr- v ?'- (O try - C i V J Z Q: I Z' Q C' w cc. Z: 2 . I Z 1 • ? ? 2 ^ 9 7 C __ March,1992 SELT BASIN TYPE-B: 77 Asilt:basi-n ype-B_is,a temporary...basin built ta:-collect sediment flowing-through a ks dra n4p ways°' hek,siYt. basin -is built: it the :base -.of th6 -.ditch..w:ith :its lcngti- :bein-- t last Z-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) 23 March, 1992 9 A a 0 N Ito N ? t )t! 1yl\) ,l 1./ III ! ! W - ??) ?\)..)a.1 i ill It a. •`v\)a. 2, J' i ' III -:.1 I I I Z:f .. 9') y , am .... LLA Z'? J 7 J . V / .. ' 211)\,. ?' ?I cr. :r.• Z yin avn x - $ ' e:.`). . ,icy. = o = 7 I II ? I z. 3 1 24 March,1992 ROCS PIPE INLET PROTECTION TYPE-A: °' 1$ a • ;r . pipe -i t p otectiom ,type-A -is a korseshoe, shaped structure with abuilt-in sediment storage. area around the.outside;perisnete:: ofe;structure• 'he-type-A rock pipe inlet protection shall be used at pipe- inlets no; larger than 36. inches in , - diameter where it is receiving flow from several directions. The type-A 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. AREAS OF USE: • At inlets to pipes no larger than 36 inches in diameter where it receives flow from several directions. In areas where it can be cleaned and maintained on a regular basis. 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