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Home My WebLink About20071579 Ver 1_More Info Received_20071129LMG LAND MANAGEMENT GROUP irrc. Environmental Consultants November 28, 2007 TO: Mr. Ian McMillan Division of Water Quality 1650 Mail Service Center Raleigh, NC 27699 O~ ~~ ~N~' ~ "°v ~~?~. 2 s>_ c~`t, RE: Additional Information for 401 Water Quality Certification Application NC Center for Automotive Research; Northampton County, NC DWQ Project # 07-1579 Dear Ian: Thank you for your letter dated October 29, 2007 in which you request additional information for the NC CAR project located in Northampton County, NC. Below is a response to each of your concerns: 1. Please re-submit your site plans on full plan sheets at a scale of no smaller than 1 " = SO'. Enclosed is a 36" x 48" site plan at a scale of 1" = 200'. We believe this map is large enough to show details of the project. 2. Please provide cross section details showing the provisions for aquatic life passage. Figure 20 depicts a cross section of a typical road crossing. This cross section shows a culvert. 3. Please provide the location of any proposed stormwater management practices. The project engineer is currently preparing a stormwater plan for the site. This information will be forwarded to your office as soon as it is complete. No wetland or stream impacts will occur from stormwater facilities. 4. Please provide plans and profiles for all the stormwater management devices. The project engineer is currently preparing a stormwater plan for the site. This information will be forwarded to your office as soon as it is complete. No wetland or stream impacts will occur from stormwater facilities. www.lmgroup.net • info@Imgroup.net • Phone: 910.452.0001 Fax: 910.452.0060 3805 Wrightsville Ave., Suite 15, Wilmington, NC 28403 P.O. Box 2522, Wilmington, NC 28402 S. Please indicate all stormwater inlets and outfalls on the site plan. The project engineer is currently preparing a stormwater plan for the site. This information will be forwarded to your office as soon as it is complete. No wetland or stream impacts will occur from stormwater facilities. 6. Please provide an inventory of proposed project imperviousness area based on the estimated built-out conditions. Please re-submit your site plans on full plan sheets at a scale of no smaller than 1 " = SO'. The project engineer is currently preparing a stormwater plan for the site. This information will be forwarded to your office as soon as it is complete. No wetland or stream impacts will occur from stormwater facilities. 7. Please locate any planned sewer dines on the site plan. All sewer lines will be located within the proposed road rights-of--way as shown on the site plan. 8. Please indicate all stream impacts including fill slopes, dissipaters, and bank stabilization on the site plan. Figures 7, 10 (overall site plan), and 20 (cross section) show the proposed stream impact location. 9. Please indicate all wetland impacts including frll slopes on the site plan. Figures 11 through 18 are close ups of each of the proposed wetland impacts. These figures show existing and proposed contours and justify the need of the impact boundary. Figure 19 is atypical cross section of a wetland impact showing a 3:1 fill slope. Proposed fill slopes were not shown on the overall site plan because this information would make the map unreadable. 10. Please locate all isolated ornon-isolated wetlands, streams, and other Waters of the State as overlays on the site plan, and include topographic contours. Figure 10 is the overall site plan that includes wetland survey information. Streams have not been surveyed in, but are known to exist along the property boundaries. These streams are mostly braided systems and establishing one centerline for these water bodies is not possible. However, we have estimated the stream locations on the enclosed site plan. The overall site plan now shows existing topographic contours (Figure 10). I1. Please submit completed DWQ stream determination forms, photographs, and maps showing stream determination locations. Enclosed are stream determination forms and photographs for the proposed stream impact locations and other locations within the project area. Please see the overall site plan for designated stream points. I hope this response adequately addresses your concerns. Please contact me if you have any additional questions. Thank you for your assistance with this project. Sincerely, .X~G--~ 'm Williams Encl. C: Mr. Gary Brown, Northampton County Mr. Mark Smith, McKim and Creed Ms. Lauren Witherspoon, DWQ Mr. Jamie Shern, ACOE ~ i ^ ~ ~~ ~ ~ ~/ ,"' ~~_ ~ / ,, ~% ~' Wetland Impact #1 -~ ~ - ,,~ , ~~ 38,114.67 ~ F ~~ ~' ,- ~,, '~ ~t~'~a (~ ~ ~ ~3aCt ~ 1 ~ ~ ~~ ~ ~ STREAM h ~~ ~- 76 LF ~-' l "" ,; ~ ~~ ,; , ,~ ~ ~ ~~~ ,: ,, ;i,~~" STREAM ~ , ~ / ~ ". i / /' ~ ~ ~" ,. ~~ '~ i - _ /~/i/i ;~ ~ ~~~ i ,~ ,, ~, ~~ % , ~~j ~ ~~`------_ i,;,, ~ %~ nary ~6t `cr Ccnstructior / ~~ ', / . __ __._ ~ r.. -- ® _ ~ ~ - ~ ~ ~ ~ 0 ~ QD 200 Figure 7 ' uJarr i Irnpa~Y t i ~i~d St c m Lr~,,c..i #1 ~~~,_. ~:~., ~r~~ ~- ® ,r t ~ ~ - n t= t e.n~ .t . !~ ~..rm en t ,f L ~" ~~ ra~~ ~ ~~t~ t~, nor _~_~~ ~ ~~ ~:~~,~~ ~~ ,~rr^~t~~n> Scale: 1" = 100' 5~~~ Wetland Impact #2 29,966.95 SF ;~~ Stream Impact #2 7o LF ,_ ~~ ~~~ ,~ ,,/~ , %~` ~, ~; ----__-- ;/ ~` ~, ~ _ ~/ j STREAM /. ~,~ -_ - ;,~ -- - ~-~ ~- . , ~~ ~~ , , ~'~/ ~ ~ ,, ~ , ,, / / / ~ ; ,,. ;, /~// ~~ - -- ~ ~~, ,, ". o' fo.- .~nst ctioo ~ ~ ~. _ l7 1- t 5 1 q _"__ `'_ ~ ~ _ s __,. ~ r,._~ ~. Ll'. r~.~r~ cap= nd =iie t,; no+ .ased ,r ~ ,eyed ;n`ormation) 0 100' 200' Scale: 1" = 100' ~~`~ ~ s - h F~i~.ure'A ~ U:` .d h ;~ 2 nd SVea~7 imr.~act?#2 ~~ ~1CDWQ Stream C_ lassification Form ~ - n roject Name: NC C A~~ ~ ~ River Basin: Ro k,ns~L S County: ~,~-}~,~,r,~-}~-, Evaluator: ~v,,, _ p~ U ~n1 ~-^~G.w~3~ ~ [WQProjectNumber: ~~~ I'~1 Nearest Named Stream: ~r~,v.rs Latitude: ~L-y~3b`~ Signature: (% ~~ t-- C.Iu k- , )ate: 1i~2t'o"k USGSQUAD: Wt~~vv~ Longitude: 'a~,~B'?I`w Locatior>/Directions: Sze ~-•-gym+~- 1. c Win.., ` ' PLEASE NOTE: !f evn(untor and lnndotvner ngree tltrtt Niefenture is n nuut -etude ditch, them use of this form is riot neeessnry. ~ 'lso, if in the best profess/ortn/judgement of the ern/untor, the feature is n ntan-mar/e ditc% mrd not n n:orlified nnturnl strermt--this n[ing s}~stem slmu[rl not he usetl's ~rlil7ary Fled 1ndlCatOPS: (Circle OneNun+berPerLinej ('eomornhology Absent Week Moderate Strong ~ Is There A Riffle Pool Sequences 0 ~ 2 3 Is The USDA Texture In Streambed Different From Surrounding Terrains 0 ~~ 2 3 Are Natural Levees Present? 0 (~ 2 3 ~) is The Channel Sinuous 0 1 ~ 3 ~) Is There An Active (Or Relic) ,-. ~) Is A Continuous Bed & Bank Present? ~ *NOTE ~ If Bed & Bank Caused 6~+ Ditching And IVlTHOUT SintrosiN Then 1 Score=0 * ~ Z 3 0) Is A 2°~ Order Or Greater Channel (As Indicated On Togo MaRAnd/Or In Fieldl Presents Y~ No=O °RIMARY GEOMORPHOLOGYINDICATOR POINTS:~C~ [I Hydrulogy Absent Weak Moderate Strong t) Is There A Groundwater 'low/Discharee Presents 0 1 ~ 3 PRIMARYHYDROLOGYINDICATOR POINTS: Z [II Biolugy Absent Welt Moderate Strong I) Are Fibrous Roots Present In Streambedy 3 CTS I 0 2) Are Rooted Plants Present In Streambed 3 C~J 1 0 3 Is Peri~hy4on Presents C6~ l 2 3 41 Are Bivalves Present? ~0`> 1 ~ 3 PRIMARYBIOLOGYINDICATOR POINTS:~_ Secondary Field Indicators: (Circle OneNm++berPerLine) 3) Does Topography Indicate A Natural Drainage Wayv 0 5 ~ 15 SECONDARY GEOMORPHOLOGYINDICATOR POlNTS:~G 11 Hydrology Absent Week Moderate Strong 1) Is This Year's (Or Last's) Leaflitter ~,~ 4) Is Water In ChannelAnd>48 Hrs. Since 0 .5 ~ 1.5 Last Krtolrlr Rain? *NOTE: I Ditch Indicated hr #9 Above Ski This Ste And #5 Belo+v* 5) Is There Water In Channel During Dry 0 .5 1 1.5 Conditions Or In Growing Season)? ~ 61 Are Hvdric Soils Present In Sides Of Channel (Or In Headcut)v Yes=1~ No=O SECONDARYHYDROLOGYINDICATOR POINTS:( _ TOTAL POINTS (Prinrarlt + Seeontlnry~= ,3Z •~(IfGreeter Then Or Equn/ Tn 79 Points T/te Stream Is Al Least Irrtermitten!) 8) Are Wetland Plants [n Streambed? SAV Mostl~ou-. [nosay rncw mosey rAC ,nos^y rA.,~ ,vrnsi.y .,~.. (* NOTL: If Total Abse+me OjAll Plmats In Streambed 2 LIJ .75 .S 0 ~ As Noted 4boie Skip This Steo UNLESSS4PPresent*1 - SECONDARYBIOLOGYINDICATORPOINTS: t{TS JCDWQ Stream Classification Form ~ z- rojectName: AlC Ca(L # Z River Basin: I~c•-~~k~ County: ~~~'a'^S~"' Evaluator: ~'.~-. W~I~iamf ~WQProjectNumber:p:}-/S~j Nearest Named Stream: ~"`rs Latitude: 31,•y3S~`+J Signature: ~~, wV~.r..__ C~uk Late: ~~~~'~o} USGSQUAD: jtJt(ar,,.t Longitude: ~~.Sg~~c~ Location/Directions: Srz ~~w•.f PLEASE NOT>;: Lf evalunmr and (nnrlowner agree that the jenture is a Imin-nmrle ditch, then use ojthis form is not necessrrrt~. P Iso, if in the best professiarnl judgement of the ern/untor, the feature is a mm~-merle ditch and not a nmdifierl nnhu•nl strenne-this Ming srstem slmuld not be used" ~PI111aYy TIC~CI IIId1CatOYS: (Circle One Number Per Line) . Gcomor bolo Absent W `tk Moderate Stroh ~ ]s There A Riftle Pool Sequences 0 I) ~ 3 Is The USDA Texture In Streambed Terrain~ Different From Sutzounding 0 ~ ~ _ Are Natural Levees Presents 0 CI ~ 2 3 Ts The Channel Smuousv 0 I ~ 3 ~) is There An Active (Or Relic) ~ z ~) Is A Continuous Bed & Bank Present? U t - *NOTF..~ if Bed & Bmtk Caused !3~! Ditching And IVITIfOUT Simiosi ~ Then Scare=0* 0) Is A 2"~ Order Or Greater Channel (As Indicated On Topo Man And/Or In Fteld) Presents Ves-,~ ^t -n °RItYIARY GEOMOXPHOLOGYINDICATOR POINTS: f 3 SCCOridBYy T'10~d TIld1C7tOTS: (Circle OneNumherPerLtne) I. Geomor bolo Absent Weak Moderate Stroh 11 [s'I here A Hezd Cut Present In Channel° 0 5 1 15 2) is There A Grade Control Point In Channel? .5 1 1.5 3) Does Topography Indicate A Natural Dram~Qe Way? 0 5 ( 1~ 1 5 SECONDARY GEOMORPHOLOGYINDICATOR POINTS: I.5 II IlvdroloQy Absent Weak Moderate Strom 1) Is This Year's (Or Last's) Leatlitter ~~ ~ n 4) Is Water in ChannelAnr/>48 Hrs. Since U •~ t ~~ Last KltpWlt Raln? *NOTF.: / Dinh Indicated ht #9 Above Ski This Ste And #5 Hetmr* 5) Is Tltere Water In Channel During Dry 0 .5 1 1.5 SECONDAR Y HYDROLOGY INDICATOR TOTAL POINTS (Prin:nry + Seconrlnry)= Za (/f Grerlter T/rrtn Or F.qua/ To 79 Points The Strennz Is At Least bttertxittent) [I Hydrolotiv Absent Weak Moderate Str~nu I) Is There A Groundwater low/Discharee Presents 0 1 l Z) 3 PRIMARYIIYDROLOGYINDICATOR POINTS: Z 6 Are h-on Oxidizine Bacteria/Fun us Present? U .~ ~ 7) Is Ftlamentous AI ac Presentv ~ 5 I 1 5 8) Are Wetland Plants In Streambed? SAV Most/hy~91I3L Mostly FACW Mostly FAC Mostly PACU NostIyOUPL (* NOTE: lJ7btal Absence OJAII Plants In Streambed 2 ~ •~5 •5 ~ As Noted Ahore Ski This Ste ~ UNLESS SAV Present* . SECONDARY BIOLOGYINDICATORPOINTS: ~.~ 0~1-151q NCDWQ Stream Classification Form Project Name: N~ C {t(` ~ ~i River Basin: ~~:~-,ar:L DWQ Project Number: Nearest Named Stream: ~~"'~ v~ - i5~`f Grz,c~ Date: t~ ~ii ~a~ USGS QUAD: Wt (d ov. {~ j I County: 1J°r'N^".""~1-'v' Evaluator: ~i,,,, t,-1i (1, a-,.~s Latitude: 3t. _ '{Yb g 'r`-~ Signature: ~ / - W p l' . Longitude: ~ ~ S~o~~ ~ Location/Directions: *PLEASE NOTE: !f evaluator med landowner agree shot flee feahere is « man-made ditch, then use of this form is not necessary. Also, if in the best professional judgement of the evaluator, the feature is « mmt-made ditch and not a modifred natural stream-this rating s~~stene sharld not be used" PYIIIIaYV F1eId II1C11CatOYS: (Circle OneNunzherPerLine~ S'.rt ~-u.~..~~' I. Geomor holo Absent Weak Moderate Stron 1) Is There A Riffle Pool Sec uence~ 4 ~ 3 2) Is The USDA Texture In Streambed Different From Surroundi~ Terrain' ~ I 2 3 3) Are Natural Levees Presents ~ Q! 2 3 4) [s The Channel Sinuous P 1 ~ 3 5) Is There An Active (Or Relic) .--, . _ )) Is A Continuous Bed & Bank Present? ~OJ 1 Z s l0) Is A 2nd Order Or Greater Channel (As Indicated On Topo Map And/Or In Field) Presents Yes=3> Nn=O PRIMARY GEOMORPHOLOGYINDICATOR P TS: t v II IIydrology Absent Week Moderate Strong I) [s There A Groundwater Flow/Discharge Present° 4 ~ ~ 3 PRIMARYHYDROLOGYINDICATOR POINTS: ( PRIMARYBIOLOGYINDICATOR POINTS: SeC011(~c`lYy F1C~d IIIC~ICc`1COCS: (Circle OneNznnberPerLine) 3) Does Topography Indicate A ~^ Natural Drainage Way° 0 5 t t 1 L5 SECONDARY GEOMORPHOLOGY INDICATOR POINTS: f • ~" II Hydrology Absent Weak Moderate Strong I) [s This Year's (Or Last's) Leaflitter ~ 4) Is Water In Channel And >48 Hrs. Since 0 .5 1 U Last K7tO7V11 Raln? *NOTE: /Ditch Indicated In N9 Above Ski This Ste ,9nd k5 Beloiv* 5) Is There Water In Channel During Dry 0 .5 I 1.5 _Conditions Or [n Growing Season)'?_ 61 Are Hvdric Soils Present In Sides Of Channel (Or In Headcut)y es=1 SJ No=O SECONDARYHYDROLOGYINDICATOR POINTS: (, ~S TOTAL POI1VTtS (Prinutry + Secondary)=~(IfGreater Tlrnn Or Equal To 19 Points The Stream Is At Least httermittent) 8) Are Wetland Plants In Streambed? SAV Most~BL Mostly FACW Mostly N'AC Mosfly rwcu iwosny urn (* NOTE: ljToral Absence OjAl1 Plants In Strea+nbed 2 1 .75 .5 ~ ~ As Noted Above Ski This Ste UNLESS S9V Preseru* . SECONDARYBIOLOGYINDICATOR POINTS: Land Management Group, Inc. NC CAR Project Environmental Consultants Northampton County, NC Wilmington, N.C. Pictures of Streams November 2007 Looking northeast along braided channel of Stream Point #1. 1 Looking east along powerline at wetlands adjacent to Stream Point #l. Land Management Group, Inc. NC CAR Project Environmental Consultants Northampton County, NC Wilmington, N.C. Pictures of Streams November 2007 1 Looking northward along channel of Stream Point #2. 1 Looking downstream from Stream Point #2 at existing culvert. Land Management GYOUp, Inc. NC CAR Project Environmental Consultants Northampton County, NC Wilmington, N.C. Pictures of Streams November 2007 1 View of stream along eastern property line (#3). j Wetlands adjacent to stream along eastern property line.