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Home My WebLink About20120502 Ver 1_Public Notice_20120522J X01 2050 2 US Army Corps PUBLIC NOTICE Of Engineers Wilmington District Issue Date: May 18, 2012 Comment Deadline: June 22, 2012 Corps Action ID: SAW- 2006 -41158 All interested parties are hereby advised that the Wilmington District, Corps of Engineers (Corps) is releasing the Draft Environmental Impact Statement and announcing a Public Hearing for the project, known as Figure Eight Island Shoreline Management Project, with plans to install a terminal groin structure along the southern shoulder of Rich Inlet and to conduct a supplemental beach nourishment on approximately 2.0 miles of oceanfront beach and 1,800 linear feet of back barrier shoreline on Figure Eight Island, in New Hanover County, North Carolina. Specific details and location information are described below and shown on the attached plan. The Draft EIS will be placed on our webpage May 23, 2012, and can be found at http:// www.saw.usace.army.mil/WETLANDS /Projects /index html. This same Public Notice is also available on the Wilmington District Web Site at htW.-Ilwww.saw.usace.arm-y.mil/WetlandsINoticesICurrent notices html. Public Hearing will be held at Ogden Elementary School (Assembly Hall), located at 3637 Middle Sound Loop Road in Wilmington NC, on June 7, 2012 at 6:30 P.M. Applicant: Figure "8" Beach Homeowners Association, Inc. C /o: Mr. David Kellam (Administrator) m m° 15 Bridge Road z Wilmington, North Carolina 28411 zl� Engineer Consultant: Coastal Planning & Engineering -NC, Inc. f z ,b, 2 A Shaw Group Company. o C /o: Mr. Tom Jarrett 4038 Masonboro Loop Road Wilmington, North Carolina 28409 Authority The Corps will evaluate this project pursuant to applicable procedures to Section 404 of the Clean Water Act and Section 10 of the Rivers and Harbors Act. Location The project site is located at 34- 491833 and 77- 419735, northern portion of Figure Eight Island and within the Rich Inlet Complex, and will encompass approximately 2.0 miles of oceanfront shoreline, and 1,800 linear feet of back barrier shoreline on Figure Eight Island, New Hanover County, North Carolina. Existing Site Conditions Figure Eight Island is an unincorporated privately developed island just north of Wrightsville Beach. It is bordered to the south by Mason Inlet and to the north by Rich Inlet, to the west by the Intracoastal Waterway, and to the east by the Atlantic Ocean. Rich Inlet and Nixon Channel is the established county boundary of New Hanover and Pender. The island is a typical barrier island that has undergone a variety of natural and anthropogenic changes. The majority of the residential island has been developed; and over two decades, authorization has been granted to Figure "8" Beach Homeowners Association (HOA) and to separate individual property owners for various activities, such as dredging, beach bulldozing, and shoreline nourishment, within waters of the U.S.' Applicant's Stated Purpose The stated purpose of the project is to develop a management plan for the central and northern portion of Figure Eight Island so as to preserve the integrity of its infrastructure, provide protection to existing development, and ensure the continued use of the oceanfront beach. Figure Eight Beach HOA has addressed the continuing oceanfront erosion problems associated with Rich Inlet and Nixon Channel erosion hot -spot on the estuarine side of the island over the past several decades. Past actions to protect the shorelines have provided some protection, however they are seeking a longer term solution to handle shoreline erosion in order to protect the island's $1,189,810,926 (based on the 2007 reappraisal) assessed property tax value. Their stated needs of the project are the following: 1) Reduce erosion along approximately 2.0 miles of oceanfront and 0.34 mile of back barrier shorelines, 2) Provide short-term protection to imminently threatened residential structures over the next five years, 3) Provide long -term protection to homes and infrastructure over the next 30 years, 4) Maintain the tax value of homes, properties, and infrastructure, 5) Use beach compatible material, 6) Maintain navigation conditions - within Rich Inlet and Nixon Channel, 7) Maintain recreational resources, and 8) Balance the needs of the human environment with the protection of existing natural resources. Project Description Within the Island's preferred alternative, the installation of the terminal groin would be the main component in the protection of the oceanfront shoreline. The location of the structure would be just north of the existing homes along the shoulder of Rich Inlet. Its total length would be approximately 1,600 linear feet, which approximately 700 feet would project seaward of the existing mean high water shoreline. The landward 900 -foot 2 anchor section would extend across the island and terminate near the Nixon Channel shoreline. This 900 -foot land section would be constructed of 14,000 to 18,000 square feet of sheet pile wrapped with rock. Although engineering design plans are not finalized, basic construction design of the seaward 700 -foot part of the structure would be in the form of a typical rubble (rock) mound feature supported by a 1.5 -foot thick stone foundation blanket. Crest height or elevation of this section is estimated to be +6.0 feet NAVD for the first 400 feet and would slope to a top elevation of +3.0 feet NAVD on the seaward end. Approximately 16,000 tons of stone would be used to construct the terminal groin. The concept design of the structure is intended to allow littoral sand transport to move over, around, and through the groin once the accretion fillet has completely filled in. Construction of the terminal groin would be kept within a corridor varying in width from 100 feet to 200 feet. Within this corridor, a 40 -70 foot wide trench would be excavated to a depth of -2.5 feet NAVD in order to construct the foundation of the landward section. The approximate 6,000 cubic yards of excavated material will be replaced on and around the structure once the sheet piling and support rock is in place. Material used to build the groin will be barged down the Atlantic Intracoastal Waterway (AIWW), through Nixon Channel, and either offloaded onto a temporary loading dock or directly onto shore. It would then be transported, via dump trucks, within the designated corridor to the construction site. Material used for nourishment would be dredged, using a hydraulic cutterhead plant, from a designated borrow site within Nixon Channel, which has been previously used for beach fill needs. Approximately 289,800 cubic yards would be required for both the oceanfront (224,800 cubic yards) and the Nixon Channel shoreline (65,000 cubic yards) fill areas. Beach compatible material from (3) upland disposal islands located along the AIWW would serve as a contingency sediment source. Engineer modeling results have shown that periodic nourishment would be required approximately once every five years to maintain the beach and Nixon Channel shorelines. The combined estimated maintenance needs for both areas are 175,800 cubic yards of material every five years, equivalent to approximately 35,200 cubic yards per year. This material would come from the designated Nixon Channel borrow site and the (3) upland disposal areas. This notice is to inform interested parties of our issued May 18, 2012 Notice of Availability in the Federal Register to release the Draft Environmental Impact Statement (EIS) and to announce a Public Hearing for this project, which can be found on the Federal Register website, at http: / /www.gpo. og v /fdsys /browse/ collection .action ?collectionCode =FR . After connecting with the website, click through the dates to May 18, 2012 (Friday). Click on either "Army Corps of Engineers Department" or "Army Department "; and locate the Figure Eight Island project. As stated above, a copy of the Draft EIS will be placed on our webpage on May 23, 2012 (Wednesday) and can be found at hu/:-' irutir .sc,tir.uscuc.c»'m }.»ril,,�YETLA �jDS /Proiec�s irlde� hrm /. Again, the Public Hearing 3 ti will be held at Ogden Elementary School (Assembly Hall), located at 3637 Middle Sound Loop Road in Wilmington NC, on June 7, 2012 at 6:30 P.M. Any written comments pertinent to the proposed work or the DEIS must be submitted to this office, Attention: Mr. Mickey Sugg, 69 Darlington Avenue, Wilmington NC 28403 by 5:00 p.m., -on June 22, 2012. Questions can be directed to Mr. Sugg at telephone (910) 251 -4811, Wilmington Regulatory Field Office. 4 c O� LOW ° CO NTY °o PENDER COUNTY -116 ATLANTIC OCEAN BRUNSWI PROJECT COUNTY LOCATION NTS AL WA.�Ay . OAC.00 1 1 1 FIGURE EIGHT ISLAND ON CHANNEL GRFE/VC / fIX �, HUTAFF ISLAND N - `- _----- -- - --- � RICH INLET I 1 t= 1 0 2,000 4,000 IZ 1 __ -- -- -- --------- - - -_.- Z 2: ;oC � / Feet H 1 1 inch = 4,000 feet p p W , ' o o°0 00. .-42 0 °o CL 04 NOTES: LEGEND: 1. COORDINATES ARE IN FEET BASED ON THE NORTH CAROLINA STATE PLANE COORDINATE SYSTEM, NORTH AMERICAN PROJECT FILL LIMIT DATUM OF 1983 (NAD 83). _ 2. RICH INLET AERIAL PHOTOGRAPHY PROVIDED BY FIGURE EIGHT ISLAND HOMEOWNER'S ASSOCIATION. DATE FLOWN: PERMIT AREA APRIL 2006. (4,282 ACRES) 3. MASON INLET AERIAL PHOTOGRAPHY PROVIDED BY NEW HANOVER COUNTY GIS DEPARTMENT, DATE FLOWN: FEBRUARY 17-18,2002. 4. PENDER COUNTY AERIAL PHOTOGRAPHY PROVIDED BY PENDER COUNTY GIS DEPARTMENT. DATE FLOWN: 2003. LEGEND: 10 +00 A ORIGIN OF SURVEY PROFILES DUNE DESIGN i'= `' :':=.r�' ; ;:y r-'•= rn ; NOTES: »5 ±oo_h 1. COORDINATES ARE IN FEET BASED ON THE NORTH z `` r t.TMr1,72 ±50 0 AMERICAN DATUM OF 1983 (NAD83). Q X17 ±�OO��p�� 2. DATE OF AERIAL PHOTOGRAPH: APRIL 2007. Z ~167 +50p�' ;OD - 162 +'S0 160=F-'09,-',A N 204000 Ct Ld 157 +_50 d`r ``s �+%�� .} _`- il'�`? ] - �"^t =-^ - _ - '`�i?� o nc• i y - .�;�n n��'„ �r�� C ��'.• �IA 'S ` . f' 2A pX,�,t,,•�'- �J�i h' -ri �• : „�, ��.L�3.a�k^..rc.`�- �-yti -':n, S•, `,f'�:: r,p '- �i V -_ n 55 +00 ,, _ `: �> ,;•� ' � , a 7, . �` 152+50'-_ E .. �� = "t�, '° ti �iZ'��'t- i,, =�a-'f a_i',�if'�,:': �ir;i.r• - }. ti.` - 'r .`+.i. s.`4. - �,9 �. ;'` ''50+00 i -;�` %��' raJ- n,'. � " -' - +YUC"1^ ..' 3-14:•:., 7 '42+ 0 { ` �r -x'81 ra1°$eT•- '!,rfi-';c�M� -- .i �t�i� �a�- � s�n;� �3- el „'';.S, :b. `7 };_..p. _ -�:g. f „s^” • ';i` � . F r S T `yY�.M •}4 11�� j� .rTe .�c"t1��1 ". L"i.�r `gyp � r `� • - �. �'� {_� .i �' ^ :. - .s;,r, + "; •'a- '•!'i�'S: -` tit Sip,+{:` '-2 _..� 'i'`.= -iyi, yl,'iL,=' .�i% - �i'„ V :.k~�,... -r- • }�, -' - - - �v'i.`rx�f =fi;: �' = - ryf •'ia -t ^�' �•��t � :u � `lw�t��, - 2 �d�, } ii ;� - ,'.a%'- �';ti7��;-.�rs�° =t' =r �y.tk .►.r��,0.. t, > = -r: WRECK <•,�j�,,`cf,tvs .•us�,` ft',3__,t�1;:i;'", 3:atYe 'wr ir,;'.�,,Qr, 4 ��;.`7 , � ., � . �r . ,; .:; -� �, -� >. Vii• .. _ aM ,x.�iw\ �Lr4NDWARD .� FILL`,,: T o +oo : 0Zf50 R as ,�'��p �" °':': y Li TERMINAL GROIN N 200000 _1 00:P00 `FI;G1 'RE E GH1'3F a, . = ; -T,i I,SLAN D ".95 +00 V. l.�;X i °•. 4;-; ,A; �,��!;;U� +,h-..,r'7- :fit -.' <.r �;„ �+i: =,� � 'e"•�i tip`~ h'`^�� -ta :i .v `.�'4S; "4`64766 (. - s� - }; 7750 1. =, DUNE FILL ;. IN% Z� s 1�Rw7Q=F0Q, - =5 :;': EQUILIBRIUM TOE OF FILL TOE OF FILL N 196000 BERM CREST i o o LANDWARD 0 ATLANTIC o 750 1500 M LIMIT OF FILL N OCEAN w GRAPHIC SCALE IN FT .Li C) o % 4 it �vlm j 04 It V T q Y� 2L_ LLI I* ....... . vent ... j j - 11 "fit }'' 1- N,, t- q ",-13 "'t" t'll < n Is .-is fs t"I'll V 1 p , K 192000 , Z.!, p I Fg( ` v Tv 10+00 A ORIGIN OF SURVEY PROFILES NOTES: 1. COORDINATES ARE IN FEET BASED ON AMERICAN DATUM OF 1983 (NAD83). 2. DATE OF AERIAL PHOTOGRAPH: APRIL VA, LANDWARD LIMIT OF FILL EQUILIBRIUM TOE OF FILL A TLAN TIC Fl LL 192000 )00 t 00 rn FTc4 w N 4 w 201000 C2 CD W -0 E °o °o S 0 250 500 RICH Feet \ INLET 1 inch = 500 feet 1 +00 200000 \ 200000 FIGURE EIGHT ISLAND \ � '\ 12 +00 199000 \, \'\ 199000 15 +37 \ - \ 17 +00 i i i� ATLANTIC -� OCEAN 198000 °o oc oc 198000 CD Co M" / M M N N N NOTES: LEGEND: 1. COORDINATES ARE IN FEET BASED ON THE NORTH CAROLINA STATE PLANE SHEET PILE COORDINATE SYSTEM, NORTH AMERICAN DATUM (NAD 83). j _ 50' BUFFER CONSTRUCTION CORRIDOR 2. RICH INLET AERIAL PHOTOGRAPHY PROVIDED BY FIGURE EIGHT ISLAND HOMEOWNER'S ASSOCIATION, 2Z CORRIDOR FOR OFFLOADING PIER DATE FLOWN: APRIL 2006 �� TERMINAL GROIN Terminal Groin Profile 12 10 8 6 4 2 0 Top Underlayer 0 > 0 Top Bedding -2 Z C -4 -6 -8 W -10 -12 -14 -16 -18 -20 -22 J - - - -- - - 0 200 400 600 800 1000 1200 1400 1600 1800 2000 Distance from baseline (ft) i i 0 10 20 30 40 50 -Top •••••• Btrn Armor _ -- top bedding 'Bottom Bedding 20 18 16 14 12 10 8 Z 6 C e. 4� M 4 16U 2 0 -2 -4 -6 -10 -10 i 0 10 20 30 40 50 -Top •••••• Btrn Armor _ -- top bedding 'Bottom Bedding 20 1S 16 14 12 10 8 ' O d Z 6 c 0 '� 4 _9 W 2 0 -2 -4 -6 -S -10 Figure Eight Island pical Terminal Groin Cross- Section Stations 12 +00 to 17+00 Armor Stone 7.5 to 12.5 Tons � •vvv. v...vvv..vv.. vv. � ■ ■ -- to 2000 Ib itt'ress ■ E %v varies 3.51 to 6.0 ft NA ,�P -10 0 10 20 30 40 s0 60 Top •••... Btm Armor - -- top bedding Existing Ground 70 so