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HomeMy WebLinkAbout20000779 Ver 1_Complete File_20000613State of North Carolina Department of Environment and Natural Resources LT40- Division of Water Quality ?•.rr• , = James B. Hunt, Jr., Governor NCDENR Bill Holman, Secretary Kerr T. Stevens, Director June 20, 2000 Haywood County DWQ Project No. 00-0779 SR 1397, Mount Sterling Road APPROVAL of 401 Water Quality Certification with Additional Conditions Mr. C.R. Styles, P.E., District Engineer North Carolina Department of Transportation P.O. Box 250 Bryson City, NC 28713 Dear Mr. Styles: You have our approval, in accordance with the attached conditions and those listed below, to replace/extend 55 linear feet of culverts in streams for the purpose of paving SR 1397 (Mount Sterling Road) in Haywood County. The project should be constructed in accordance with your application dated 5 June 2000 (received 13 June 2000). After reviewing your application, we have decided that this fill is covered by General Water Quality Certification Number 3103. This certification corresponds to the Nationwide Permit Number 14 issued by the Corps of Engineers. In addition, you should acquire any other federal, state or local permits before you proceed with your project including (but not limited to) Sediment and Erosion Control, Non- Discharge and Water Supply Watershed regulations. This approval will expire with the accompanying 404 permit, unless otherwise specified in the Water Quality Certification. The following additional conditions will be required: 1. The culverts shall be installed in such a manner that the original stream profile is not altered (i.e. the depth of the channel should not be reduced by a widening of the stream bed). 2. All culverts shall be installed at least one foot below the channel bed so as to allow passage of water and aquatic life. 3. All work shall be performed during low flow conditions. 4. Care must be utilized such that live (wet) concrete does not enter the stream channel. 5. The presence of equipment in the channels must be minimized. 6. The project shall be inspected during construction by NC Division of Water Quality Regional Office and/or NC Wildlife Resources Commission staff due to the "High Quality Water" classification of the impacted streams. This approval is valid solely for the purpose and design described in your application (unless modified below). Should your project change, you must notify the DWQ and submit 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 the conditions. If the proposed fill is in excess of 150 linear feet of stream length, compensatory mitigation will required as described in 15A NCAC 2H .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 above. 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 that 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. 1621 Mail Service Center, Raleigh, North Carolina 27699-1621 Telephone 919-733-5083 FAX 919-715-6048 An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post-consumer paper 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 919-733-9646. Attachment Pc: Wilmington District Corps of Engineers Corps of Engineers Asheville Field Office Asheville DWQ Regional Office Central Files, "4Ff g. is V. Sincerely, &Stev 5 p1141? . . ap)) STATE OF NORTH CAROLINA f a? MEup DEPARTMENT OF TRANSPORTATION JAMES B. HUNT JR. DAVID McCOY GOVERNOR SECRETARY June 5, 2000 Haywood County SR 1397 PAYMENT RECEIVED Mr. Steve Lund, NCDOT Coordinator O U. S. Army Corps of Engineers Regulatory Branch 151 Patton Avenue, Room 143 Asheville, NC 28801-5006 Dear Mr. Lund: The North Carolina Department of Transportation is proposing to grade, drain, base and pave primarily along the existing roadway of SR 1397, Mount Sterling Road in Haywood County. In order to construct this project in accordance with our current secondary road standards, and due to the replacement/extension of three (3) pipe culverts in an unnamed tributary of Big Creek (DEM Class C, Tr, HQW), we are requesting authorization under Section 404 of the Clean Water Act. 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/extensions in the unnamed tributary of Big Creek, general notes and standards on erosion control measures, and a marked County Map are enclosed. We propose to install the new culverts 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 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 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 Mr. Steve Lund Page 2 June 5, 2000 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), 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. Yours tr , 0 17? C. R Styl P. E. Distric ineer CRS:sd atta. cc: Mr. R. G. Watson, P. E., Division Engineer Mr. E. L. Ingle, Area Roadside Environmental Engineer Mr. Mark Davis, Habitat Coordinator W. Mtn. Dist., NCWRC Mr. John Dorney, Water Quality Certification Unit, DWQ P.O. Box 250, Bryson City, NC 28713 Phone (828) 488-2131 DWQ ID: 0 0 ? 9 CORPS ACTION ID: NATIONWIDE PERMIT REQUESTED (PROVIDE NATIONWIDE PERMIT #) !Ll PRE-CONSTRUCTION NOTIFICATION APPLICATION 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. PI EASE PRINT. . 1. OWNER'S NAME: NC DOT District Engineer: C R Styles, P. E. 2. MAILING ADDRESS: P ,O. Drawer 250 SUBDIVISION NAME: N/A CITY: Bryson City STATE: ZIP CODE: 28713 PROJECT LOCATION ADDRESS, INCLUD G SUBDIVISION NAME (IF DIFFERENT MAILING ADDRESS ABOVE): S P,,, 13? 7 *?BD , rl i ,n 4 R , i Y1 L? 3. TELEPHONE NUMBER: (HOME) WORK) (828) 488-2131 4. IF APPLICABLE: AGENT'S NAME OR RESPONSIBLE CORPORATE OFFICIAL, ADDRESS, PHONE NUMBER: Same as above # 1 0' LOCATION OF WORK (PROVIDE A MAP, PREFERABLY A COPY OF USGS TOPOGRAPHIC MAP OR AERIAL PHOTOGRAPHY WITH SCALE): COUNTY: Ho',voo"d NEAREST TOWN OR CITY: C el 1 MSPECIFIC LOCATION (INCLUDE ROAD ^ NUMBERS, LANDMARKS, ECT.) °o `ta 044 ?? IZ l 3 3 Z t &-6 f ' V I loo c? c? , h ?- , h (? c?u Gv . /1 eta r? Ny r4L Co rvl a T nrt'sse 6. IMPACTED OR NEAREST STREAM/RIVER: ' '?C C'a5S API rL I N? ??? ? II p ? RIVER BASIN:- 1:?re ^ I cy ?c+ l? ?? i CS ?` (a) IS PROJECT LOCATED NEAR WATER CLASSIFIED AS TROUT, TIDAL SALTWATER, (SA), HIGH QUALITY WATERS (HQW), Op STANDING RESOURCE WATERS (ORW), WATER SUPPLY?y S-I OR WS-II)? YES NO E] IF YES, EXPLAIN: C (b) IS THE PROJECT LOCATED WITHIN A NORTH CAROLINA DIVISION OF COASTAL MANAGEMENT AREA OF ENVIRONMENTAL CONCERN (AEC)? YES NO [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? - 8• (a) HAVE ANY SECTION 404 PERMITS BEEN PREVIOUSLY REQUESTED FOR USE ON THIS PROJECT? YES p NOK IF YES, PROVIDE ACTION I.D. NUMBER OF PREVIOUS PERMIT AND ANY ADDI'T'IONAL INFORMATION (INCLUDE PHOTOCOPY OF 401 CERTIFICATION); (b) ARE ADDITIONAL PERMIT REQUESTS EXPECTED FOR THIS PROPERTY IN THE' FUTURE? YES 0 NO N1 IF YES, DESCRIBE ANTICIPATED WORK: 9. (a) ESTIMATED TOTAL NUMBERS OF ACRES IN TRACT OF LAND: -Z a 0 (b) ESTIMATED TOTAL NUMBER OF ACRES OF WETLANDS LOCATED ON PROJECT SITE: 10. (a) NUMBER OF ACRES OF WETLANDS IMPACTED BY THE PROPOSED PROJECT BY: FILLING: EXCAVATION: FLOODING: OTHER : DRAINAGE : 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: LENGTH BEFORE: FT AFTER: FT WIDTH BEFORE (based on normal high water contours): WIDTH AFTER: FT FT AVERAGE DEPTH BEFORE: FT AFTER: FT (b) (2) STREAM CHANNEL IMPACTS WILL RESULT FROM: (CHECK ALL THAT APPLY) / OPEN CHANNEL RELOCATION: PLACEMENT OF PIPE IN CHANNEL: ?L 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? 12. DESCRIPTION OF PROPOSED WORK INCLUDING DISCUSSION OF TYPE OF MECHANICAL EQUIPMENT TO BE USED? (ATTACH PLANS: 8 '/," BY 11" DRAWINGS ONLY): To widen and pave SR 131)1 to meet current NCDOT Standards by use of track hoes, bulldozers, dump trucks, back hoes, manual labor, etc. 13. PURPOSE OF PROPOSED WORK: Sarre as above in # 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) Tn na;n tha naPfM width to build SR 13 "17 to NCDOT Standards. All Channel changes wi11 be constructed in the dry. Rip rap will only be used for bank stabilization. Alders, Red Maples L Black Walnuts Willows Sycamores Dogwoods etc will be re-established on the banks. All pipe replacements will be placed slightly below the existing streambed gradient so natural 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: Handled by Corps N/A 17. DOES THE PROJECT INVOLVE AN EXPENDITURE OF PUBLIC FUNDS OT THE USE OF PUBLIC (STATE) LAND? YES % NO ? (IF NO, GO TO 18) (a) IF YES, DOES THE PROJECT REQUIRE PREPARATION OF AN ENVIRONMENTAL DOCUMENT PURSUANT TO THE REQUIREMENTS OF THE NORTH CAROLINA ENVIRONMENTAL POLICY ACT? YES ? NOA (b) IF YES, HAS THE DOCUMENT BEEN REVIEWED THROUGH THE NORTH CAROLINA DEPARTMENT OF ADMINISTRATION STATE CLEARINGHOUSE YES [] 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? Rural wMdland R_ogidentl8l (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 PROGRAM. OWNER'S/AGE T' ,SIGNATURE DATE (AGENT'S SIGNATURE VALID ONLY IF AUTHORIZATION LETTER FROM M X11, 4 p S SNOWBIRD_•-.? Ir •? ?I Q a J H 1 PEAKED KN00 M O' U I N T 1, N 5 I 5'9 S v. r ., •` / / \ ROUGH KNOB ' HARMON s ' !• ?° 4 t% AF6p097 133- \ DEN WILDLIFE - I \1 G '1797 - ?n37, fQ/ ? C PUG -.i A. - a MANAGEMENT I Cdd HAYNES KNOB a' M A OaY•\'.'"? ( BUZZARD R005i © 1779 OUNT CA %r DE LEv. 5.025ER AREA -A -I PISGAH a Fl- Criek .6 ?^ e 13- 1 13-0 77A NATIONAL P7az ila.u.,A 'fin 3-7 It 13X J a ? ' , 7_ 7 GRASSY'KNOB ?. 5 13-1 1))tl `.- soo 7 'BY KNOB y / I 1 (? ?) 1797 / ?7 `? - CV. 5.145 ,tk r / 13A4 .5 /• C, Jar. r.'.'.J WATERVILLE r Nst I .mot i ?? ? , 1776 _?? MT,STERLING « 1 2 ' ../ ELEV. 5,835 LME OAK MIN. / rz.7 ? ? r, 1337 4 x f 1796 IY6 ?: .. 1JBf r •? R E A T S M Y 1736 13se %.• .- 7CrW 1Y16 l '\ A - a a P.O- C.4 BIG CATALOOCHEE MOUNTAIN `p 1,2 •?! ELEV. 6.122 1 J 13A6 1335 E>r \ / rr, \?•/'-•?\ CANADIAN TOP 9 M _ I \ FOREST 'I ELEV. 4,118 .. --/ BALSAM CORNER??+?y ?" \ ? ? , , M1 / ?tr I I\ \ i.# COVE CREEK OAP SEAM J l` M O U N T A I N ` ELEV. 9,062 :J ATrN? _ \ I LEDGE BALD* rd' b,. \•'• I / ~ 1331 / •\?. 1373'' \ _I 276 3 9 HIGH ti TOP / I - \ 1 \ SPRUCE MiN, f PURCHASE KNOB , .--7 '?. 1(OELEV.5.590 A1,/ u 7 13 i n L ) ..' 1719 AwMlr1 / l ;4 's4-2 i 1 P\i A R K (1 -J 1 / 'I ' 1•a 1365 UTAH NTN. O \ CATALOOCHEE BALSAM\ „ 1)16 vl4 / 'tlf, 9lE .\ O LIT TLE.BALD KNO6 `F 9 G I EL E V J S.6T7 1 LEATHERWOOD MTN. 776 ri 1 \ 2'4' 1701 276 Z ` 1 6.0-w ( ^ /? \ 1 / l) /a?a ?i ?a? a/ _ Co. ROAD NAME f??ou.?7. STE•?/??? S.R_ /39'7 _ W_ 0 _ ?. 9?f215 FROM r ADD ITION IMPROVEMENT TO BE PAVED P. POLES TO BE MOVED T. POLES TO BF_ MOVED R /W WIDTH SCALE I" = 50 Z)1; TE: 9-iG-9q f' ............ . . . . . . . . .. Railroad ..::.' ......................... C Control of Access Line.'........... • : • a - Slope Stalce Dine ............... .. .- rtdbe' -, , B Culvert:..':.: :''... ..:.... .. Woods . . Z'c:lepliL) or.Tele?rul?li 1'olc ......... tt:?tS't' -o- ?t'ttot? O- t Tower Pole and Line... • • • • • -~ ? - . ' 1:..N Is . Power Pole ....................... :Easenlc nI Line..:..:.:.:' :..........:..: ?????.? Mowincr Limit'.. .................... ? • ? 1 T T T ? Guard 11ail .................. . Sanitary.Sp.wer.Line. .:......... • ..., =s Water Lint ................. . • Ga5 Gas Liner .•....................... ...... .::.........:...: • ,. IIit0t'u5F:u r.;ctST tNc Chain Liti1': Fence ................... -?----? -G--fl_ ':.. Woven W i r e Fence .. • . . .....:...... ' i/? ?. ?.? RLacneracion ....... Reforestation ':...: • :..................: ? Te ni p o r arv Silt Hitch :............... ------ 't :?; i TSU ?----- Temporat•y Silt Fe11c e --{'? Ten?pot•st?y.Slo?e DrIIIIi' .: .:......:....:. . Brush Ltit•t;il?r .. r - -°•- SUtCheclcDamTypeA'•,.•.•••••••••••• ^ Silt Checlc Dam IWe•B ..'. • .... • • . • . .......' .?. o Silt Basin T -pe'A' ....... Si1c basin' Type B ...•........:........ . Hock Silc Clieclc Dam .... ... • • • • • • • • • 2aI*Lh Derni • ...'.. .•......... . Temp,' Slone Djlch Check 6 r ??yE'c,tc.? y E vE•e y ,S'TD.?/>) E !/?"i1?T /?iV G?LE,s??V61J d!/T LUiS'??? ?S:?1Lf f// ,Vd T Td S C/1 E S ., .4 7- .5 . 41 /ARF-/1 /. rV('rAl oF -v7s7'1,W13E-2) ACE/1 - (. ?? any vsC ONLY LE:rGr%r a.? V/S7*a.eBED 11)7611 J- !. 6-N67 // 4/' J?/S7'//,CBE h ?,e . .5??00 Jr ?-DO I I el8 P I lee 119 I IBg FDO ??' CIS •?Jti° . c?aa??G, ?C .ZBG a `7 0 71 vI I? 18 N? I .. j'Ro,p scD D SOD I ID ?? J 1j.40 .. 1 /D X00 -4-4-` l 0 I I I T I .StoO s 449 0 I I ?z Ago- ? r,? 00 ,,? _ .?,egoos e 112 61?O vl FCiS 3d ?C? P 0 ?,oP, yt 'Yh'P I1 -4--4 I I 10 s?'a. /080 Mvvc -1o sIa.. /D 422 io goo /6 DOI z zo x-00 Q zo ?°° ? O I 0 P? e y2 cM/° I 4-L' 1 15-1001 I ?s?oO 0 TEMP :STONE. .DITCH CHECK. :. ROCK SILT CHECK DAM SILT ..BASIN :. - B TEMP SLOPE DRAIN TEMP SILT DITCH -TSD- EARTH EMBANKMENT SILT FENCE FIBERGILP.SS ROVING RIP RAP EGp, tp? 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 flowwhile 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 17 March, 1992 _ a u= 1 I- Z:° I I I._. p I I I ,'L - W W W L PAP i W..t-_' -.1---- -?--- - ?O IL Qi `fir I ? 4:• ?=T?j ? ^•' CL3 C4 C= Qi W TZ: i}} .^-. 2H: r W C f) 1 - 1 F0 >? 0... wH ? I EW.. 0. li I- ? .Z p.] © ?_ C0 { rn c Li - F tv -' O W 14 F _ L?L7- f 1 co i<<?FCQCi \.L = W W ? G Z<_ -3 ZWW /L/??• 44 C4 Wp>-UM= tel. - Z C4 C4 <G? ?CF -3 CL V/ <Z W- <Wd00. ?Z• ?- L7 C/7 U=M-- >- I (n W0= ?pW Z" ©-py,N -3 ZIO =U U <<? L¢?<pOaCo iOW t _ Z W i. CC. 4U W Zp <F r... i i cn Z .G-Wp N Z. .0. 0- cnZE-• -CoFW 0J•¢ O W?;O3:? nF4U7FUU r, W y° O Z Ca W C" 6 C N W Z -.1 IV)l E >. I N LLJ Z. Q 18 March,1992 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) 23 March, 1992 pIN IN 111111 s d 7 , ?l? ) ? • ? .,; ? `' :"' '?: ?')• Illy ? III ? , i ) 1 D] - ; ? .;• , ?`'? ? - 111111 ;?? •) ??7 •\7MJ III Ii IL \ •:,V,:.?',`)?•)?? iHlili Z-l. 11111 = = Z Hill m z = a „N?Ja'?7 illli Q _J Cv. Z , -Ilii ?, Nom: 1„ I ? 'VA ?,... . -WA $ = llll 1j1; ?E i O i 1 Z ' ' 24 March,1992 A? ROCK PIPE INLET PROTECTION TYPE-A: ° o A rock pipe inlet protection type-A is a horseshoe shaped structure with a built-in sediment storage area around the outside perimeter of the structure. The 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. 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 33 March, 1992 k Q w a CL a cr L w z aJ 7 W W F s ¢ -? ? Z O Z E., F W Z O 0 a= Z z y, Q E 0. O F 0. W m F :? z W¢ U O W m C4 U ¢ m _ ¢ .4 fn CO 43 cr) O W O 0. W m CL' 0. .7 F V) W C4 C.. FZC+ FO...] 0.w _ Z U ?NQFCONOO QOUZO =p0.0zU-, Z I- C4 W M=C!M2-3 W Z F Cn W E^ o W W Z F W V) M V) UpmUF-3`m ¢ 0.'JZ¢3Z ..] 0.: 0.q . 7 W¢ W 2 0. 0. W F .7 F W W F U¢ Z Z Z¢ 0 0.C^ Z p U 2 W O W Z O O O F o a 0 U F m Z m C/1 U F U fn V) O F 0 z D 0 a U J Q = O L X 2 r Z i'Q; a w ' l CL n. I ' C I CD Cl) Ir ' w > I Z I w z o N J Q G f7 r Z u Q n N ? o LL. M w w o z N O N w w 0 0 4. CL O O r r N N O r O o w J S LL O w N Q O W o U V)rn J V O I' r w 0 w N z,m co Q W O H U W ? cr- CL O Z LLI LLI U f O O Q L-J Z Q F- Ln o. O Z. c ¢ . . O! ,pi ; w in 34 March,1992 ?{ 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 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. minimum and 3 ft. maximum ( shall not be higher than 1 ft. above normal flow of stream) 37 March, 1992 4 ?l w W cr. N > O Q. 0 m C \ 0 0 0 . ] C,] ts7 F Z pFCL3 O OFna0Z (n CFp G Z Z E- Co F :c Cs. ¢ ¢ cn O _ 4. G]? UO ,Z WW ¢p OW o0©o=w CC Cm - CL ¢ COW 4.0. C ZO 0.. C ?pFO 0`n_OZ?G] O .J zc O ¢ ¢ZC, UOfn OF0 ¢ Ct, -?n.OCil FZ C4 z W 4] U _ a Z: Z V) UZ-3©UE...: =M< p --3 0 0 C) to J E ¢ -3 E CL3 FF?Z ¢ZZ¢t/? ?OG'UZ<aFp' O? L40=00- E--OCO =4,W Z ©UV)UE-V UlV)C"C.U v)-Q 38 J X_ m 4 0 C O ww i N 3 W N (D Z 0 LL X a i ? ? W O Z ? N O Z ; I ;J a ~ c U j)V^ 7 tD ..? - In 0 NL \; U ell N d u z W S O N Q z w w OL, U J z F-1 0 -? ..Z O 00 ? . i ?p ? r Q V ' 10 co: IF' C r Z. C o I . O Z N _ = o a Z ?? •r .n n c9 7 - V. _ March,1992 ?? 1397 I I .vdT ?o .S, c a/C-? ?2o?se G5K ,cz'? C•? ' V2 I I n.?oy?Gp 1 ? itoC.r S; l ? Sc?EE?I I I I I 1 • 1 ' ? 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