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HomeMy WebLinkAbout20110465 Ver 1_Application_20110516I n?o STATE OF NORTH CAROLINA DEPARTMENT OF TRANSPORTATION BEVERLY EAVES PERDUE GOVERNOR May 6, 2011 USACE Raleigh Regulatory Field Office 3331 Heritage Trade Drive Suite 105 Wake Forest, NC 27587 Attention: Eric Alsmeyer NCDOT Coordinator 0 MAY '5? , 1 6 2 Q yam "'M*DDS ,0 ? ? Rg????? "n'Cy EUGENE A. CONTI, JR. SECRETARY 11 0465 Subject: Replacement of Bridge No. 94 over Tributary to Tar River on SR 1565 in Person County. TIP No. BD-5105K; WBS Element No. 42815.1.11 Dear Sir: The North Carolina Department of Transportation (NCDOT) proposes to replace Bridge No. 94 over Tributary to Tar River on SR 1565 in Person County. This project is being processed under the Low Impact Bridge Replacement Program. The following are attached to this cover letter: Attachment G: Low/Minimal Impact Bridge Data Sheet USGS Topographic Map Attachment L: NCDENR-DWQ Nationwide 3/WQC #3687/Riparian Buffer Data Sheet USACE Preliminary Jurisdictional Determination Form Stormwafer Management Plan Jurisdictional Resources Summary Sheets Permit Drawings If you have any questions or need additional information, please contact Mr. Chris Murray at (919) 220- 4633. rSincerely, W. Bowman, P.E. Division Engineer c: Division 5 file, NCDOT Rob Ridings, NCDENR-DWQ Division Five- 2612.North Duke Street, Durham, North Carolina 27704 1 clephone: 919-220-4600 Fax: 919-560-3371 I_Ownvonimai Impact tssrlage rroject uata aneet ! TIP NO BD-5105K WEIS 45351.1.11 I Coun Person I Brid a Number Bridge 720094 I Description Bridge No. 94 over Trib. of Tar River on SR 1565 l Basin Tar-Pamlico Classification WS-IV NSW Stream SIN 28-(1) Type Inland Size 20 It [Type 1-span Existing Structure ) Size 26 ftx 20 ft Suff. Rating 49.3 Proposed Structure Type Sze 1-span 65ftx30ft USACE Impacts (LF) 55 linear feet Stream Non 404Impacts LF 0 linear feet USACE Impacts (AC) 0.03 acre Wetlands Non 404 Impacts (AC) 0 acre LAMA Im acts AC Not Applicable NC DWQ Buffers I Impacts SF 55 linear feet Buffer Application Required (>40 ft) (YIN) Yes NC DWQ StormWater i Permit Required YIN No Habitat(yln) aN wedgemussel: No TSE Species Present nwedgemussel NO Bio Conclusion wd wedgemussel: No EXeq m M t i Type Not Applicable ora or u Dates Not Applicable NativelHatche Not Applicable ( Trout Species Present Not Applicable Trout Waters Trout Conditions YIN Not Applicable I WRC Reviewer Not Applicable CAMAI AECs Not Applicable Essential Fish I Habitat In No Nav.l O enin Not Applicable USCG I Permit Not Applicable Historic IProperties No Survey Required Archaeological lResources No Survey Required Tribal I Lands Not Applicable 4(? Aesources Not Applicable 6 LWCF I Resources Not Applicable Wild and I Scenic River Not Applicable Forest Service I Lands Not Applicable. TVA IArea Not Applicable FEMA IBu out No FEMA I Flood Study No Involvement USTs I Haz Mats No IRelocatees No i SLAT 36.3708212 Locat on ?LDNG - 78.8355543 Project Comments No habitat for dwarf wedgemussel per Karen Lynch (PDEA-NEU) and confirmed by USFWS. `` _ Completed by:1 I Lead Engineer /L f=zi Division Environmental Officer 516/2011 z 0 0 0 0 0 m n z 0 0 0 0 0 n M z 0 0 0 0 0 eo M z 0 0 0 0 0 z o- 0 0 o- 0 v M U/iS.pb000UU vu? lurp.oov uuuu vvl yr p.pwvwv vvl iv?u.u..?wv? I ? rx?? ? I! ? f b(M ?? l / J- t 1J<71t A ?Lfit ? ?1 f f -50 I X, , ? ? Pro ect SAe . t n , C r?' ar+al tt?.?1 ;1 t -r`? )t? ?\\ 1 ?'v.% 1 ^ ?;>" j _ NCOOT fv. )lcaA r i , ? a - r ? I?° Bride o 94 over Tributary to Tar ? Xe,ni / Person aunty Lat.:36. 71028 Long.78.834917- Scale: 124,000 Triple S Brings USGS Tops Map (19 iveron SR 156b -- 0) V I (1 l /y, f ?r)J/?/?.' V'JIi? r?, \ ? rrDDD } x,74 ?? r r ? \\? t 1 Rip, f.. ` , ? l 1 l ;+. 11? _l 1; t / r 1_ ) // ( (/?t / ?, / ) I ?? (1 1J ?f ..,. / / /? t ( rr , J'r GIIIr / r f`/ )v ?If ,+J? I '? f .\ii tl. ?1? 11 ,1 `? l h?,1 1 1?r ?1 `) \ ' E ';) ?7 4 ?? > v) L }'' .?. ?? `'„ 77 1 , AN y -'--- i - 6mi-- ? l ! 1 ? A t % -n"• l , ? i ? 1 ? l r 0.^ ? 1 rj .??j 7 1 W - 1^ t r ? < - r?\?, 1k ' i t v?£i 'r< - qru????\\?.< < „1 Y n ? ??; ?,[[ti'??/ ?. ? 1 f r?^`•L.,' 7 r ?) j c x ?r ?=? %(t"S ?/? fh'{ ? l v ,rte , I?l . 1 i t ???? ). ?. 7 J ??? i1,??? V'?./ Ai , 1 V ' / r ` ? t I r+ Magnetic Declination i J?l 7 lit ' t 7 J : ' i n ' ? )? ? Z r ' ? '^- qtr ? / t ?' t f? i .? ?- '. % 1078.860000°?W 1 1078.850 0000°?W? 1078.8400000°'W? 078.?3000d0°WI l 10788200000°IW! z 0 0 0 0 0 m z 0 0 0 o. 0 n M z 0 0 0 _o 0 0 _n z 0 0 0 0 0 M z 'D 0 0 0 o. v n Datum: NAD27 Copyright (C) IUUB, My I opo NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality - Beverly Eaves Perdue Colleen H. Sullins Governor Director Attachment L: Low Impact Bridge Replacement Process Low Impact Bridge Project Number: BD-5105K County: Person Bridge No. 94 over Tributary to Tar River on SR 1565 WBS Element Number: 45351.1.11 This project is subject to the Low Impact Bridge Process as agreed to on October 6, 2009. This project meets the documentation requirements and approval procedures under NEPA, as defined by FHWA, for Low Impact Bridge Replacements. This project meets the standards of NCDOT's Minimum Criteria Rules. Date: May 6, 2011 Applicant Name: J. W. Bowman, P.E. Applicant Address: 2612 N. Duke Street Durham, INC 27704 Primary Contact for Project: Chris Murray, PWS Phone Number: (919) 220-4633 Is this an after-the-fact application:_Yes -X No River Basin: Tar-Pamlico Stream Classification: WS-IV NSW (DWQ Index Number: 28-(1)) Regulatory Authorization Options for this Activity Federal: USACE Nationwide General Permit 3 - Maintenance State: General Water Quality Certification #3687 and Buffer Authorization Local: None Dee Freeman Secretary Project Description: Replacement of existing 1-span bridge that is 26 feet long with another 1- span cored slab bridge that is 65 feet long. Permit Impacts: See attached permit drawings and summary sheets. Stormwater Information: See attached stormwater management plan. Signature: CA? c. Print Name: C r Title: (6 17-oIl Transportation Permitting Unit 1650 Mail Service Center, Raleigh, North Carolina 27699-1650 Location. 2321 Crabtree Blvd., Raleigh, North Carolina 27604 Phone: 919-733-17861 FAX: 919-733-6893 Internet. http:llh2o.encstate.nc.uslnc etlandsl NorthCarolina Naturally An Equal Opportunity 1 Afrumalive Action Employer ? -D - SioS- ? ATTACHMENT PRELIMINARY JURISDICTIONAL DETERMINATION FORM BACKGROUND INFORMATION A. REPORT COMPLETION DATE FOR PRELIMINARY JURISDICTIONAL DETERMINATION (JD): B. NAME AND ADDRESS OF PERSON REQUESTING PRELIMINARY JD: NCDOT, Division of Highways Division 5 2612 N. Duke Street Durham. NC 27704 C. DISTRICT OFFICE, FILE NAME, AND NUMBER: D. PROJECT LOCATION(S) AND BACKGROUND INFORMATION:) NCDOT TIP No. BD-5105K, Bridge No. 94 on SR 1565 (USE THE ATTACHED TABLE TO DOCUMENT MULTIPLE WATERBODIES AT DIFFERENT SITES) State:NC County/parish/borough: Person City: Denny Store Center coordinates of site (lat/long in degree decimal format): Lat. 36.3708212° N, Long.-78.8355543° W. Universal Transverse Mercator: Name of nearest waterbody: Tributary to Tar River Identify (estimate) amount of waters in the review area: Non-wetland waters: Site 1 length in review area is 100 ft linear feet: Site 1 width in review area is 20 ft width (ft) and/or acres. Cowardin Class: Riverine Stream Flow: Perennial Wetlands: Site 2 in review area is < 0.1 acre, Site 3 in review area is 0.1 acre; Site 4 in review area is <0.1 acre and Site 5 in review area is <0.1 acre acres. Cowardin Class: Site 2 is forested, Site 3 is forested, Site 4 is forested and Site 5 is emergent Name of any water bodies on the site that have been identified as Section 10 waters: Tidal: N/A Non-Tidal: N/A E. REVIEW PERFORMED FOk SITE EVALUATION (CHECK ALL THAT APPLY): ? Office (Desk) Determination. Date: ® Field Determination. Date(s): November 30, 2010 1 1. The Corps of Engineers believes that there may be jurisdictional waters of the United States on the subject site, and the permit applicant or other affected party who requested this preliminary JD is hereby advised of his or her option to request and obtain an approved jurisdictional determination (JD) for that site. Nevertheless, the permit applicant or other person who requested this preliminary JD has declined to exercise the option to obtain an approved JD in this instance and at this time. 2. In any circumstance where a permit applicant obtains an individual permit, or a Nationwide General Permit (NWP) or other general permit verification requiring "pre- construction notification" (PCN), or requests verification for a non-reporting NWP or other general permit, and the permit applicant has not requested an approved JD for the activity, the permit applicant is hereby made aware of the following: (1) the permit applicant has elected to seek a permit authorization based on a preliminary JD, which does not make an official determination of jurisdictional waters; (2) that the applicant has the option to request an approved JD before accepting the terms and conditions of the permit authorization, and that basing a permit authorization on an approved JD could possibly result in less compensatory mitigation being required or different special conditions; (3) that the applicant has the right to request an individual permit rather than accepting the terms and conditions of the NWP or other general permit authorization; (4) that the applicant can accept a permit authorization and thereby agree to comply with all the terms and conditions of that permit, including whatever mitigation requirements the Corps has determined to be necessary; (5) that undertaking any activity in reliance upon the subject permit authorization without requesting an approved JD constitutes the applicant's acceptance of the use of the preliminary JD, but that either form of JD will be processed as soon as is practicable; (6) accepting a permit authorization (e.g., signing a proffered individual permit) or undertaking any activity in reliance on any form of Corps permit authorization based on a preliminary JD constitutes agreement that all wetlands and other water bodies on the site affected in any way by that activity are jurisdictional waters of the United States, and precludes any challenge to such jurisdiction in any administrative or judicial compliance or enforcement action, or in any administrative appeal or in any Federal court; and (7) whether the applicant elects to use either an approved JD or a preliminary JD, that JD will be processed as soon as is practicable. Further, an approved JD, a proffered individual permit (and all terms and conditions contained therein), or individual permit denial can be administratively appealed pursuant to 33 C.F.R. Part 331, and that in any administrative appeal, jurisdictional issues can be raised (see 33 C.F.R. 331.5(a)(2)). If, during that administrative appeal, it becomes necessary to make an official determination whether CWA jurisdiction exists over a site, or to provide an official delineation of jurisdictional waters on the site, the Corps will provide an approved JD to accomplish that result, as soon as is practicable. This preliminary JD finds that there "may be"waters of the United States on the subject project site, and identifies all aquatic features on the site that could be affected by the proposed activity, based on the following information: ° SUPPORTING DATA. Data reviewed for preliminary JD (check all that apply - checked items should be included in case file and, where checked and requested, appropriately reference sources below): 2 M Maps, plans, plots or plat submitted by or on behalf of the applicant/consultant: vicinity map and plan. ® Data sheets prepared/submitted by or on behalf of the applicant/consultant. ? Office concurs with data sheets/delineation report. ? Office does not concur with data sheets/delineation report. ? Data sheets prepared by the Corps: ? Corps navigable waters' study: ? U.S. Geological Survey Hydrologic Atlas: ? USGS NHD data. ? USGS 8 and 12 digit HUC maps. ® U.S. Geological Survey map(s). Cite scale & quad name: 1:24,000; Triple Springs. ? USDA Natural Resources Conservation Service Soil Survey. Citation: ? National wetlands inventory map(s). Cite name: ? State/Local wetland inventory map(s): ? FEMA/FIRM maps: ? 100-year Floodplain Elevation is: (National Geodectic Vertical Datum of 1929) ® Photographs: ? Aerial (Name & Date): or ® Other (Name & Date):Site photographs (3/22/2010). ? Previous determination(s). File no. and date of response letter: ? Other information (please specify): IMPORTANT NOTE: The information recorded on this form has not necessarily been verified by the Corps and should not be relied upon for later jurisdictional determinations. Signature and date of Regulatory Project Manager (REQUIRED) person requesting preliminary JD (REQUIRED, unless obtaining the signature is impracticable) I IZ$ I II Site Cowardin Estimated amount of Class of Latitude Longitude aquatic resource in aquatic number Class review area resource 1 36.3708212 78.8355543 Perennial 100 linear feet Section 404 Stream 2 36.3708532 78.8358942 Forested <0.1 acre Section 404 Wetland 3 36.3708877 78.8357030 Forested 0.1 acre Section 404 Wetland 4 36.3709566 78.8354906 Forested <0.1 acre Section 404 Wetland 5 36.3707154 78.8354269 Emergent <0.1 acre Section 404 Wetland Notes: -Site 1 is crossed by existing bridge. DATA FORM Q l7' S l u 5 \? ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: r. oar uri c. Qtov aA52 I5165- - o5-t; Date: ?- I -r Ito ApplicanUOwner: N cool County: ?ers u n Investigator: C r Jr ro State: N C Do Normal Circumstances Exist on the site? (:2 ) Community ID: s Is the site significantly disturbed (Atypical Situation)? Transect ID: Is the area a potential Problem Area? Yes 0 Plot ID: (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator //1? 1. ch.Ker?4 Cyr:JfiCot FA(LJ 2T(4YiAU), VeAA ty4.i, c? 5(s R C L-1 10. 3.L !JuSt•rvr 91ACA59. -5b- A c it. 4. ACC( (A r0 -S- FRc 12. 5. Rcer (t,fy1 f,1,,^ T' Ar- - IF 11 6.Torj codealyon rgd )c?AS FA C, 14. p 7.Li m e4kry, EuCpi term 'r F 7TC 15. 8. 16. Percent of Dominant Species that are OBL, FACW or FAC .t? f O O "J u (excluding FAC-). Remarks: pre.\tncc off`- ?„a??opktit'?L Sptc?t> at5i fi? , HYDROLOGY _ Recorded Data (Describe in Remarks): Wetland hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: _ Aerial Photographs _ Inundated Other ? Saturated in Upper 12 Inches _ No Recorded Data Available Water Marks Drift Lines Sediment Deposits Field Observations: Drainage Patterns in Wetlands Secondary Indicators (2 or more required): ",Depth of Surface Water: N f- (in.) 7 Oxidized Root,Channels in Upper 12" Water-Stained Leaves Depth to Free Water in Pit: NI A (in.) _ Local Soil Survey Data IFAC-Neutral Test Depth to Saturated Soil: C O (in.) Other (Explain in Remarks) Remarks: 1 ` W CAlo K eVJeit4-- at S;1-, , II SOILS TS-D- S t a & h w etlw.Sl C 1144. 0.kcyt 50..s. %A-Poo, l..l f Map Unit Name 4We6"4v-ke: ?our 'A of e? (Series and Phase): I'l6J qc(g t CJ V. J k.oe_ Drainage Class: Cj%ew FlvuwqucAt5 c Dys+r. clhrepr3 Field Observations Taxonomy (Subgroup): WLIg& l lto.e t T!jpr, a F(uvo j,cA fS Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color Mottle Colors Mottle Texture, Concretions, inches Horizon ( Mun s el l M oist) (Munsell Moist) Abundance/Contrast Structure, etc. ?? ?? __ ?? ???? '' n-I A 1?!` 5b.d-% I4 y••, 1"L 13 (040-61, (LS 16 CO-041dtsti-I - $ ?Ajkpj c.(" (mw?, 4-121- Q ( 6 2 o 26 6 Cu. Aural cl S?twc? G(c. Hydric Soil Indicators: _ Histosol _ Concretions _ Histic Epipedon _ High Organic Content in Surfa ce Layer Sandy Soils _ Sulfidic Odor _ Organic Streaking in Sandy Soils _ Aquic Moisture Regime _ Listed on Local Hydric Soils List A educing Conditions _ Listed on National Hydric Soils List Gleyed or Low-Chroma Colors - Other (Explain in Remarks) Remarks: I tTtid,/tL 50r\ qt' $c,.,P II/t? P0 1,A WETLAND DETERMINATION Hydrophytic Vegetation Present? No (Circle) (Circle) Wetland Hydrology Present? No Hydric Soils Present? fe No Is this Sampling Point Within a Wetland? Yes No Remarks: flU 3 put. -e+ccS cro- Ficu.l- ai vek Approver by HUUSAUL 3192 DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) g ?-S t o5 1? Project/Site: r."'tov. r ut Tc.r Riyckf dA I S D-5 oSK- Date: ro 0 Applicam/Owner: Acoar- Investigator: c Ica County: tr State: N L Do Normal Circumstances Exist on the site? No F Community ID : U A0. Is the site significantly disturbed (Atypical Situation)? es C Transect ID: Is the area a potential Problem Area? Yes C / Plot ID: (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator s> S r-?r(„ 2.Suh9vus U)r!5 wl_cj S 5 F CU' ,o. 3. Wti;tnr?tno?ren rw)„C„n, ? r r4 ,,. U?•+?s gMert?y ?? a. f the w 12. , 5. v'M'}I 4K.ar1 (Md F/f( w 13. (er rJ,rd s. A ? Fhc 14. /? 7. ACA( (Vt(V r S? P// `- 15. 8. outrw) 0 5 5 /FCC- is. Percent of Dominant Species that are OBL, FACW or FAC -7/9 (excluding FAC-). Remarks: PctuH\+ncc ??C- ??r??pti.-t'h.c. 5P<i.?e} at- 5ii•c. HYDROLOGY _ Recorded Data (Describe in Remarks): Wetland hydrology Indicators: _ Stream, Lake, or Tide Gauge Primary Indicators: _ Aerial Photographs Inundated Other _ Saturated in Upper 12 Inches No Recorded Data Available _ Water Marks _ Drift Lines Sediment Deposits Field Observations: _ Drainage Patterns in Wetlands Secondary Indicators (2 or more required): Depth of Surface Water: (in.) _ Oxidized Root Channels in Upper 12" • _ Water-Stained Leave-• Depth to Free Water in Pit: (in.) Local Soil Survey Data FAC-Neutral Test Depth to Saturated Soil: (in.) Other (Explain in Remarks) Remarks: w e?-(" ?nyrk?o017 for DL S<rpc$? 4'1- Sam P)'4.2 f ol'A t• SOILS P1 ' Glaw..c?.;.Serc..lnra-DOJ/1ti 'P Map Unit Name /' wel,udkett PuJny D!'w?tcA (Series and Phase):C 10-, ?s_ W e?. r..4kee oo^+> Drainage Class: Fluvo.gJn,.hz DtiShro clrKPfif Field Observations Taxonomy (Subgroup): L r c1+uAkee: ' r OC FlJ VNf? JfA IS Confirm Mapped Type? Yes Profile Description: Depth Matrix Color Mottle Colors Mottle Texture, Concretions, inches Ho izon (Munsell Moist) (Munsell Moist) Abundance/Contrast Structure, etc, r o-( 1T (u z Sane ?o?. y (? 3 lo7(L S 6 reW.d4srr,ot 5 ,L J, c?R k ?oa-H 7 -(Z-? ?? (O 5kA111 L.?n?o q.-r-) Hydric Soil Indicators: _ Histosol _ Concretions _ Histic Epipedon _ High Organic Content in Surfa ce Layer Sandy Soils _ Sulfidic Odor _ Organic Streaking in Sandy Soils Aquic Moisture Regime _ Listed on Local Hydric Soils List _ Reducing Conditions _ Listed on National Hydric Soils List - Gleyed or Low-Chroma Colors - Other (Explain in Remarks) Remarks: NOA-6.',&« 5VA AI- 5c'- Ph'.'g p67,1- WETLAND DETERMINATION Hydrophytic Vegetation Present7 e No (Circle) (Circle) Wetland Hydrology Present? Yes Hydric Soils Present? Yes pd'o\ Is this Sampling Point Within a Wetland? Ye No Remarks: lJ /Uon we-F1u& ai 5a-rPI.?nS Qo of a,Lj Approved by HQUSACE 3/92 ®m \ \ 19 W 6 J W '-?' \ 6 Ise rw? DD h ? 8l J p w? WJ Vr a o° a 4 %W r? °o N ? W W? O S? O N U? N N Q /?/ yil yp ?- O W? LV G81111?yyy?NN?.. ¢? ? ND V au??WJ?41^co-5 ? ?? W W 1 W rah ?- ooa7? J3 ``F iOOJ i Z? O: Nm W (?I ?{N S? py_???W?u Tf 1 vON?f..l 8 W 0 Y f ? Z W? S OW: Q Yr 4sd WN ?> N = ? < J Z !3? ?? Wy J WJN - F J S s ? °O d ?b b Ise ? w } ? bb +f 7 a W aG2 w? ?F a 00 WN N NV' \? Zi i ` `gym ? J \ ? d s ?.(? ?? r r V a6 ? n \\ 6 gill rd? J ?B \' G of 1 ? <ti rr j 1 ` ll 1 Nl cN U Z z? =m zz V!`Mr)13M f ?O \ 4. s 3 `r ?J IV N .'q N?P N W N W J W W J W p W JW? ?^wo1 m Pb, O O NNO N W W W ?^P P IN, ,I ' APP __._ mom p+ooo? p, pi Ci 0'o ? P o Q Q P P P Ne ryna -Y?nPNNNN O[]p OtDMmO BD-5105K (looking upstream). (looking upstream). (looking downstream). STORMWATER M_'i NAGEMENT PLAN Project: 4535 I.D. No. BD-5105K Person County 5/03/2011 Hydraulics Project Manager: W. Herbert Turner, Jr., PE (Florence & Hutcheson) Randy Boyd, PE (NCDOT Hydraulics Unit) ROADWAY DESCRIPTION The project consists of construction of a new 65 feet long 24" cored slab bridge to replace the existing 26 feet long bridge #94 on SR 1565 over Tributary to Tar River. The total project length is 0.082 miles. The project is located in the Tar-Pamlico River Basin. The project drainage system consists of grass shoulders, grated inlets with associated pipes and rip rap pads at the pipe outfalls. Jurisdictional Streams: Tributary to Tar River ENVIRONMENTAL DESCRIPTION The project is located within the Tar-Pamlico River Basin in Person County. The stream is classified as WS-IV; NSW. There are wetlands in the northwest, northeast, and southeast quadrants of the bridge. Tar-Pamlico Buffer Rules have been adopted for the project. Storm water impacts to the stream have been minimized by utilizing sheet flow on grass shoulders along the roadway, draining to wetland, and compliance with Buffer Rules to provide sheet flow before entering the stream. Wetland impacts have been reduced to a minimum by avoiding ditching through the wetlands. The existing drainage patterns have been maintained with the hydraulic design of the project BEST MANAGEMENT PRACTICES AND MAJOR STRUCTURES The primary goal of Best Management Practices (BMPs) is to prevent degradation of the states surface waters by the location, construction and operation of the highway system. The BMPs are activities, practices and procedures taken to prevent or reduce stormwater pollution. The BMP measures used on this project to reduce stormwater impacts are: Sheet flow on Brass shoulders along the roadway This will promote infiltration and filtration of pavement runoff by directing sheet flow over grassed shoulder slopes. Discharge stormwater to wetland Stormwater from the bridge will be drained to wetland to promote filtration at 12+35 LT. Pipe outlet protection with class B rip rap will be used to dissipate energy to provide a non-erosive sheet flow to the wetland with Q10=0.2 cfs and VI 0=0.4 fps. Compliance with Buffer Rules to provide diffuse flow NW quadrant: Proposed roadway is in fill section and no proposed ditch (concentrated flow) is expected through buffer. Bridge stonmwater will be drained to wetland to diffuse flow. Thus, sheet flow will be provided through buffer. NE quadrant: Proposed roadway is in fill section and no proposed ditch or storm drain outlet (concentrated flow) is expected through buffer. Thus, sheet flow will be provided through buffer. SE quadrant: Proposed roadway is in fill section and no proposed ditch or storm drain outlet (concentrated flow) is expected through buffer. Thus, sheet flow will be provided through buffer. SW quadrant: Proposed roadway is in fill section and no proposed ditch (concentrated flow) is expected through buffer. Pipe outlet protection with class B rip rap will be used to dissipate energy and diffuse flow from bridge stormwater outlet at 12+35 RT to provide a non-erosive sheet flow to the outfall area with Q10=0.2 cfs and V 10=1.3 fps. This will provide approximately 30' of sheet flow before entering the buffer. Preformed Scour Hole can not be used at this location because the slope of the ground downgrade is 25% (too steep). No deck drains This will avoid direct discharge of storm water from the bridge deck into the receiving water. Bank stabilization Bank stabilization with class II rip rap is provided on both sides of the stream at the bridge crossing to provide long-term bank stability to prevent erosion. This will provide a stable steam and the stream will not degrade in the evolution process. 2 ?6 Em _ Oi N N C C U d m E E F- ? n U K L E Q W U - a c ? 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