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Home My WebLink About20080680 Ver 1_More Info Received_20080512DR. J.H. CARTER III & ASSOCIATES, INC. Environmental Consultants P.O. Box 891 • Southern Pines, N.C. 28388 (910) 695-1043 9 Fax (910) 695-3317 To: MR. IAN McMILLAN CA- olc8O DIVISION OF WATER QUALITY 401 WETLANDS UNIT 1650 MAIL SERVICE CENTER RALEIGH, NC 27699-1650 WE ARE SENDING YOU Attached Copy of letter Prints Letter of Transmittal Date: 4-9-08 Job # 0817 Attn: Ian McMillan Re: Savannah's Garden permit Reports X Maps Plans Data Photos Permit COPIES DATE # P s DESCRIPTION 5 5-8-08 3+ Letter response to DWQ request for information for Savannah's Garden subdivision, Carthage, Moore County, NC L?0 1J 9 THESE ARE TRANSMITTED For approval Approved as noted X For your use Approved as submitted MAY' ?? X As requested Returned for corrections U "Ai n ;' niatti For review and comment For your information WETLAND5 AND STORMWATER BRANCH REMARKS: Ian, I've enclosed 5 copies of our letter response and maps in this packet. Please contact me with any questions or concerns. Thank you. Jennifer M. Archambault Wildlife Biologist COPY Mr. Ken Averitte - DWQ TO: Ms. Emily Burton - USACE Mr. Ron Jackson - Quality Built Homes Mr. Scott Matthews - NSE, Inc. SIGNED: If enclosures are not noted, please contact us mmediately Endangered Species Surveys • Environmental Assessments • Land Management 9 Wetlands Mapping and Permitting DR. J.H. CARTER III & ASSOCIATES, INC. Environmental Consultants P.O. Box 891 • Southern Pines, N.C. 28388 (910) 695-1043 9 Fax (910) 695-3317 8 May 2008 J !J NI r, ; . Mr. Ian McMillan DE-N AND STOR'MWATEI? S?,p1CH 401 Oversight/Express Review Permitting Unit WETLANDS NC Division of Water Quality 1650 Mail Service Center Raleigh, NC 27699-1650 RE: Savannah's Garden subdivision Dv?? DWQ Project #08-0680, Moore County Dear Mr. McMillan: This letter is in reference to our recent telephone conversation and the request for more information in a letter dated 25 April 2008, regarding the permit application for wetland impacts at the Savannah's Garden subdivision in Carthage, Moore County, North Carolina. I've enclosed 5 copies of full-sized plans in addition to the information that follows. As requested in questions 1, 4, 6 and 7 of your letter, the enclosed plans depict stormwater infrastructure, the existing Phase I lot layout and the proposed lot layout design for future construction, and the lot setbacks and building envelopes for lots with wetlands. I have included a 17x22-inch sheet (scale: 1 inch = 163 feet) for reference and a split drawing on 2 large sheets at the requested scale (1 inch = 50 feet). Regarding questions 2, 3 and 5, ple area calculations (enclosed). C, ln( The revised calculations list the total impej -- :he impervious area is expected to be under 24% (as outlined in G ;re not addressed. A geotechnical report of the subsuri )mless culvert location will be prepared and submitted, as requested by qu .......,., Fluject designers at Neal Smith Engineering, Inc. (NSE) and relayed several points from the discussion I had with you about bottomless culverts. After conferring with the owners, NSE staff indicated that a bridge at this location would be cost prohibitive and a bottomless culvert is the preferred crossing option. As such, NSE will coordinate the preparation of the required geotechnical report. A copy of the report will be submitted to DWQ upon completion. Endangered Species Surveys • Environmental Assessments 9 Land Management 9 Wetlands Mapping and Permitting Regarding question 9, fill on lots 12, 13 and 42 cannot be avoided. Note that we submitted an after-the-fact permit application to address these impacts, as they have already occurred. Dr. J.H. Carter III & Associates, Inc. also submitted the Wetland and Stream Restoration for Savannah's Garden Subdivision, Carthage, Moore County, North Carolina, dated 28 March 2008. Both the restoration plan and the after-the-fact permit application were prepared and submitted at the request of the regulatory agencies to bring this project into compliance with wetland regulations. Regarding questions 10 and 11, there will be no impacts to wetlands (jurisdictional or isolated) in future phases. As described in the permit application and depicted on the enclosed plans, wetland impacts will be avoided in future phases and any future utility crossings will use either directional boring or an aerial crossing on pilings. Contact me if you have additional questions or need more information. Please also coordinate with Mr. Ken Averitte at your DWQ Fayetteville Regional Office regarding this project, as he has been onsite and is knowledgeable about the project status. Thank you for your time. Sincerely, Jean er M. Archambault Wildlife Biologist Enclosures: Revised impervious area calculations Maps (3 sheets) CC: Mr. Ron Jackson, Quality Built Homes, Inc. Mr. Ken Averitte, NC DWQ Fayetteville Regional Office Ms. Emily Burton, Wilmington Regulatory Field Office, USACE Mr. Scott Matthews, Neal Smith Engineering, Inc. Savannah's Garden - Impervious Area Calculations (Revision) Tuesday, May 06, 2008 Phase 1 Total 21.63 Acres Road Area 2.15 Acres # of Lots 55.00 Avg. lot Coverage 20 lots @ 2,032 SF 40640 SF Avg. lot Coverage 35 lots @ 1,390 SF 48650 SF Avg. Driveway and Sidewalk 55 lots @ 820 SF 45100 SF Total Lot Coverage 3.09 Acres Impervious Area 5.24 Acres Total Area 21.63 Acres % Impervious Area 24.20% Phase 2 Total Road Area # of Lots Avg. Dwelling Coverage 36 lots @ Avg. Dwelling Coverage 54 lots @ Avg. Driveway and Sidewalk 90 lots @ 41.79 Acres 3.00 Acres 90.00 2,032 SF 73152 SF 1,390 SF 75060 SF 820 SF 73800 SF Total Lot Coverage a 5.10 Acres Impervious Area 8.10 Acres Total Area 41.79 Acres % Impervious Area 19.37% Proiect Totals Total Area 63.42 Acres Road Area 5.15 Acres # of Lots 145.00 Phase 1 Lot Coverage 3.09 Acres Phase 2 Lot Coverage 5.10 Acres Jurisdictional Wetlands 6.48 Acres Impervious Area 13.33 Acres Total Project Area 56.94 Acres 23.41% D~ nuD WSO 3388/98 \ ~ ~ 6~I93' r~ \ .a \ ~ ~ \ LEGEND ID r \ rr 1 ~ ~ ~ Exlsting sewer lines onsite ! \ i ~ \ I , I rt \ ~ ~ 1 1 I T T ~ ~ ~d Wetlands Onsite o v ~ _ ~ ~ i 1 11 I ~ / i T ~ ~ r ' , 11 ` 1 I - r / \ \ w ~ Permanent wetland impacts 20 wide exlstm sancta ~ 1 ; r 4 cts sewer easement ~ , ; ~ 1 j,.~ , _ r \ ~ Q ~ \ ~ ~ , Storm drams i . -_1 ~ \ 1 \ ~Z L _3 \ 7 Wetland A ~ \ ~ ` rr ~ ~ _ , ' _ - I ~ , \ \ ~ ~ Topographic contours (5.52 acres) \ ~ r f I ~ i r Dinh 1 ~ ~ ~ - - ' I ~ ~ ~,7 Lot setbacks . ~ v / I ~ ~ ~ ~ ~ \ i I 11 \ / i ~ / -----y ~ > ~ \ r , I ~ / _ _ _ _ - ~ i i H Bu~ldmg envelopes I to Stream channel ~ - u.,,,~ ~ - 1 1 ~ - { 11 ~ ' \ f, __T\ , ` \ { I III i v v 11 ~ \ ~ 1 120• was sm v ~ II 1 I _ II ~ . r / 5` \ { i ~ 2319/3 ! ~ \ I \ i ~ { '1 i' (PC 10. 918s 721) ~ I Ditch 2 ~ { ~ ~ 3321/393 ~ , I \ \ ~ ~ \ r V A ~ ~ ~ ~ / / ~f~~~~~ a 1 1~ / / r Ditch 3 ~ ~ Y~ ~ ~ v v°~ / / \ ~ 1 I / ~v ~ . A \ \ ~ 1 1 ~ ~ \ ~ / f . . r lti / A\ 1 I ~ ~ ~ V A ~'~V A / M / ~ ~ ~ / \ l ~..,rp1F ~ ~ ~ ~ \ r / ~ / / ~ ~ / A' \ .2319 / i / / ~ ~ v m 513/912 ~ ~ \ / / / \ / / ~ ~ ~ r \ ~ / ~ \ PC 8 SWE 738 ~ / / \ ~ ~ ~ \"s~ "~e~ \ \ , ~ ° / ` / \ i' ~ ~ ~ \ s~ ~ i l j \ \ / / 1 / 2319/339 \ \ ~ , ~ 1 (x 1$ Suds 588) \ / Osed bOtt ~ ~ / ~ , < ; \ ' ~ ert cro Internal sewer line / ! \ ~ / ~l `~'~l ~ / ~ ~ ~ ,X~ r I { ~ _ I ~ / / r I 1 V , , , ~ I / / / I I 1 - ~ -----1\ / ! / / r I 1 \ ~ / / ~ I 1 ,7 ) ~ ~ I ~ ~ ~ ~ l \ j i \ Wetland C (0.44 acre) ~ ~ / , r I I 1 ~ . i ~ y r i I 1 ~~4~ou~~~o~° . maw 1~s<r / ~ / d~~~l ~ Wetland B (0.51 acre -Isolated) / Scale: 1 inch =163 feet h = 163 feet Savannah's Garden subdivision showin existin and ro osed bases, buildin envelo es and lot setbacks for lots containin wetlands, stormwater infrastructure, wetlands delineated onsite and >nsite and g g p p P g P g permanent wetland impacts, Carthage, Moore County, North Carolina. IPF - - S88 03'S3'E ~ ~ 530.21' ~ ~ ~ ~ ~ ~ g~ ~ ~ IJ Existing sewer lines onsite ~ ~ ~ h ao o / ~ / ~ 1 I ~ - _ ~ 1 ~ ~ / ~ g~ ~ , 20' wide existing sanitary ~ ~ ~ 1 { 1 I ~ sewer easement ~ 1 ~ ~o ~i~ - - , ~ ~ ~ Wetland A ~ b (5.52 acres) ~ G~ ' / ~ ~ ~ D~ ch 1 ~ , ~ l ~ i ~ ~ ~ i ~ . ~ ~ ~ ~ ~ ~ ~ ~ L ~ / - _ Stream channel ~ ~ _ / ~ 0 hh ~ £034 o~ / ~ B~3 o~ ~ oC~ \ , ~ D~tcr ~~L~C~~ ~Ortl~~~c~f~Op~" . . ~~o~ _~~,t 3321 /303 . . / Di l l ~ l~ o0 ; , . \ . , ~ Duch 3 ~ ~ ° ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ / ~ ~ i ~ ~ o ~ goo ~ ~0~ ~ ~ ~ 1 ~ ~ g~ ~ _ ~ 0~ \ _ , _ ~ ~ _ _ _ r ~ _ _ _ _ ~ _ _ _ _ _ \ _ _ _ ~ / _ ~ \ 00 \ < 0 g / / \ o / \ ' ~l l ~ ~ gg \ / ~ ~ ~ j ~ o t ~ ~ ~ / ~ ~ ~ ~~o ~ ~ f ~ \ ~ ~~g ~ ~ 00 ~ ~ CM F ~ ~ I ~ \ ~ / \ ' ~ ~ / ~ o ~ ~ ~0 ~o o ; ~ i \ ~ ~ ti ~o ,,G., i (f ~~g~ ~ ~ I ~ ~ \ i 0~ ~ ~ ~ / \ I ~ ~ II ° II ~I1 ° 0 0 go I ~ ~ ~ 513 912 ~ ~ ~ ~ ~ ~ ~ PC 6 SLIDE 738 ~ ~ ,~v \ ~ ~o , ~ / \ o / ~ ~ oh ~ ~ ~ ~~g ~ i h ~ ~ ~ i ~ ~ / y i i ~ ~ i ~~o i a / ~ \ i ~ ~ ~ ~ ~ ll~ ~ ~ _ _ ~ ~~o ~ _ _ _ _ _ s i ~ ~ ~ ~ ~ ~ ~ 1 ~o ~ ~ o ~ ~ ° o~o ~~g / \ I / ~ ~ ~ ~ ~ P-~ - _ ~ i \ i ~ o - ~ 2pQ8 ~ M , ~ / ~ ~ I h~~~RBRAN~ ~ 0 v DEHW•V'iATE A~, 0 S AND SSDRMw ,h AND h h ~ ~ ~ ~ ~ / ~ ~ ~ I ~ i M I ~ ~ .Of~ ~ ~ ~ ~ ti\ i i ~ ~ / ,1~ ~ ! j / ~ ~ ~ r ~ J' 6a - ~ J ~ ~ ~ / ~ ~9 ~ / ~ . / / I ~ / C~~ ~ . ~ ~ ~ . / / ~ ~ IP N8 °49 5~ "W II ~ 0 0 0 ~ X075.93' o ~ ~iletl a n d B 0.51 acre -Isolated ~ pg - ~ t~8o 3366/68 S88 0353'E S88 0353'E 604.93" ~ ~ - - - - ' ~ - ~ ~ / \ ~ ,pry. II ~ i / ~0 ~ ~ - iii \ ~ ~ ~ \ ~ 4~ ~ / ~ ~ ~ 6 ~i - I ~ . - I ~ ~g \ ~ i N~~ ~ ~ 20' Wide Existing Sanitary ~ / / P~ \ - - _ _ I Sewer Easement ~ ~ ~ ~ i - s ~ ~ ~ a 1 ~ / ~ / / ~ 1 / 2319/339 ~3~1 \ , ~ ~ ~ (PC 10, Slide 721) / \ p~j~- \ ~ / \ \ N / / ~ \ / \ \O ° ~ ~ w \ / / / \ ~ u \ ~ m ~ ~ ~ , ~ ~ ~ a. ~ \ / / Qo \ / \ N.. O ~ ~ e ~tij \ ~ ~ ~ ~ X34} ~ \ ~ ~ i i i i i i i i i ~ \ / / ~ a ~ \ ~ `r' ~ ~ ~F \ ~ \ / ~ \c9~ \ \ \ 2.31. \ \ 9/339 \ \ (PC 10, Slide 721) / / / \ \ \ / boo 27 \ \ ~ ~3~ / \ ~ / ~ / ~ ~ \ ~ ~ ~ ; ~ ~ 3~ ~ ~ ~ / ~ / ~ i! ~ \ ~ ~ / ' , Y \ O~ \ ~ 2319/339 \ \ (PC 12, Slide 580) \ ~ osed bo~.t s ' ' ert gyros n Int ~o Internal sewer line ~o - _ _ _ _ ~ ~4g _ _ _ hod / i ,~1 ~ i ~ \ ~ ~ X ~ ~ \ ~ i ~ ~ ~ ~ \ qq/~ D ' I 1 y \ \ ~UN~~SrUVaN ri;c / 1 ~ ~ / \ ~ / ' ~ J/ ~ ~~1 ~ \ ~G°3G°QC~~ ~3 TOM / \ o 01~1~ C~PC~~S 100 i~~10 ~ \ ~ ~ ~I o1~ ll QC~PC~~ Olt on 6~3 I 6~ I C~Oo \ ~g Do [NOR ~ ~ ~ = 6eg~ Qc~rrc~~ ~lc~~ N885335'!~ / P F 479.39' 7 IPF / Sheet 2 g ° Scale: 1 inch = 50 feet ~ i