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HomeMy WebLinkAbout20120288 Ver 1_CAMA Application_20140804NCDENR North Carolina Department of Environment and Natura Pat McCrory Governor July 28, 2014 Division of Coastal Management MEMORANDUM: TO: Karen Higgins 401 Oversight DEMLR - Surface Water Protection Resources John E. Skvarla, III Secretary FROM: Jonathan Howell, NC DENR -DCM Assistant Major Permits Coordinator 400 Commerce Ave., Morehead City, NC 28557 (Courier 11- 12 -09) SUBJECT: CAMA / Dredge & Fill Major Permit Application Review Applicant: Village of Bald Head Island Project Location: "The Point ", between South Beach and West Beach, adjacent to the Atlantic Ocean, on Bald Head Island, Brunswick County Proposed Project: Construction of a terminal groin Please indicate below your agency's position or viewpoint on the proposed project and return this form to Jonathan Howell at the address above by August 21, 2014. If you have any questions regarding the proposed project, contact Heather Coats at (910)796 -7424 when appropriate, in -depth comments with supporting data is requested. REPLY: This agency has no objection to the project as proposed. This agency has no comment on the proposed project. This agency approves of the project only if the recommended changes are incorporated. See attached. This agency objects to the project for reasons described in the attached comments. SIGNED DATE N.C. Division of Coastal Management 127 Cardinal Drive Ext., Wilmington, NC 28405 Phone: 910-796-7215 1 FAX: 910 - 395 -3964 Internet: www.nccoastalmanagement.net An Equal Opportunity \ Affirmative Action Employer DIVISION OF COASTAL MANAGEMENT FIELD INVESTIGATION REPORT 1. APPLICANT'S NAME: Village of BI-11 PROJECT NAME: BHI Terminal Groin 2. LOCATION OF PROJECT SITE: Project site is located at "the Point ", between South Beach and West Beach, adjacent to the Atlantic Ocean, on Bald, Head Island,, Brunswick,County. Photo Index - ,2006: 11 -6178 2000: 11 -104 1995: 7 -128 State Plane Coordinates - X: 2301297 Y: 44552 Rover File: N/A ,Lat: 33° 52" 05.1385" N Long: 78"00149.1098"W 3. IN ESTIGATION TYPE: CAMA/ Dredge & Fill 4. INVESTIGATIVE'PROCEIDURE: Dates of Site, Visit — 5/31/,13 Was Applicant Present — No 5. PROCESSING 'PROCEDURE: Application Received:— Complete 7/,25%14 Office - Wilmington 6. SITE DESCRIPTION: (A, Local Land Use Plan — Village of Bald'Head Island Land Classification From LUP — No classification. (B) AEC, (s) Involved: M, OEA, PT, EW (C) Water D'ependent:, Yes (D) - Intended Use: Public (E) Wastewater Treatment: Existing — N/A Planned - N/A (I') Type of Structures: Existing — N /A. Planned - Terminal Groin. (G) Estimated Rate�of'Erosion: 8' peryear Source- 2011 LTAASCR,Update 7. RABITA1 DESCRIPTION: [AREA] - DREn('TM FI LED OTTER' (A) Vegetated Wetlands §404 wetlands —1.72 acres (B),Norf= Vegetated Wetlands X35.2 acres (terminal, groin) —0.98 acres- (dredged for fillet) 25,.3 acres (fillet) (temporary; trestle - - - construction) Other — High ground 0.25 acres ° (terminal groin) ­,0 11' acres (temporary; trestle —6.9 acres (fillet) construction) (D) Total Atea Disturbed: 70.46 acres (E) Primary Nuesery Area: No (F) Water Classification: SA/SB Open. No 8: PROJECT SU, AEM LARY: The applicant,proposes construction of a terminal, groin. Village of BHI- Terminal Groin Page Two 9. PROJECT DESCRIP'T'ION Bald Head Island is part,of an island group known as Smith Island, located at the confluence of the _ Cape Fear River and Atlantic Ocean between Fort Fisher and Oak Island/Caswell Beach. The island is accessed byprivate boat or'a private ferry service from,Southpott. Thus project islocated at,an area between South Beach and West Beach known as "the Point ", on Bald Head Island, in Brunswick County. The project site is bordered by the Atlantic Ocean to the south and east, the Cape Fear River to the west and residential properties to the north. The entire project area is located within the, Ocean'.Erodible and,l let Hazard Areas of Environmental Concern (AECs). The annual erosion rate for the project area is- 8' /year per the Division of Coastal Management's 2011 Annual Erosion Rate maps. A portion of the adjacent Inlet Hazard Area north of the,proposed terminal groin location (along West Beach) has a.2' /yeavdrosion rate. The Coastal Resources Commission established'this erosion rate in 2009' by Declaratory Ruling. The 100 -year storm recession line is predicted to be 270' in the area. The South Beach portion of the project falls within the USACE Wilmington,Harbor,Sand Management Plan project, which authorizes the placement of material excavated from the federal navigation channel on South Beach at Years 2 and 4 of a 6 -year cycle, South Beach last received sand under the federal project in the winter of 2012/2013. A short stretch of West,Beach was-also included in this last disposal event. West Beach was also previously nourished in 2006 under State Permit #62 -05, issued to the Village of Bald Head Island on April 28, 2005 (Federal Permit 1980'00291). State Permit #62 -05' authorized the�excavatiori of,approximately 40,000 cubic yards of material from Bald Head Creek, which was then deposited on West Beach. State Permit #139 -10 recently authorized the dredging of approximately 1.40;000 cubic yards-,of additional material -from the mouth of Bald Head Creek, which was placed on both West & South Beaches in 2012. State Permit #09- 95,'issued to the Village -of Bald Head Island, authorized nourishment of a portion of South Beach: A minor modification of the permit was granted on July 7,,1995 by means of a: - - CRC variance, for installation of the sand groin field on South Beach (Federal Permit #199404687). A minor modification of State Permit, #9 -95 was also issued by CRC variance for the construction of a 300 - linear foot sandbag - revetment west of Groin #16 -and extending- towatds "the Point" on Augustr8, 2011. The permit Was -most recently modified on November 12, 2013 to remove a permit condition deemed irrelevant to ongoing required monitoring efforts. State Permit #67 -09 was also issued _to "the Village of Bald Head Island for the dredging, of approxvnately 1_.86 million cubic yards of sand from Jay Bird Shoals for the renouri'shment of South and West Beaches. Work under this permit,was performed in 2010. The waters of the Cape Fear River and Atlantic Ocean are classified as SAJSB by the North Carolina Division of Water Quality. The waters are not designated as a Primary Nursery Area (PNA) by the N.C. Division of Marine Fisheries. They are CLOSED to the harvesting,of shellfish. Village ofBHI- Terminal Groin Page Three PROPOSED PROJECT: The applicant is proposing the construction rof a 1,900' terminal groin at the area known as "the Point" between West Beach, and South Beach. The terminal groin would likely'be constructed in two phases. As proposed, the first phase would entail construction of the landward 1300' (approximate length) of the structure. Construction would commence at the completion of the next federal beach,disposal project, or in May 2015 if no supplementary sand is required for the fillet. If additional sand' is required to achieve the full profile of the 'fillet, the applicant has stated ,that sand would likely be excavated from Jay'Bird Shoals and work could be delayed until after November 1, 2015. Turtle monitoring within the project area during the moratorium would be, performed by the Bald Head Island Conservancy. Construction may additionally require the construction of sand work pads on the structure's updrift side. Sand would be pulled from the federal disposal berm within 2500' of the groin to ,construct the .sand pads. Alternatively, the applicant has' stated that 'a steel -pile trestle may be needed instead to construct the nearshore portion of the groin. The trestle piles would be jetted into place and subsequently removed upon completion of each phase of ,the proj ect. The terminal groin would be constructed of large armor rock with a rock - filled marine mattress or composite filter fabric /geogrid base: Armor stone would be limited to a uniform size (1.4 to 7 tons each with a 4' -6` diameter) and the structure would be constructed at a maximum elevation of +7' NGVD .29 to enhance permeability and allow for controlled downdrift sediment transport. The structure is designed with a maximum, crest width.of 15' along the head section, and a 6 -10' crest width along, the stem section. The head, and ,stem sections would be, constructed at a 2:1 slope. The upland tie -back section of the terminal groin would measure 6' in width ,at its crest. The tie -back ,section location would be excavated to an elevation of 0' NGVD 29, then the groin section ,constructed at a 3:2, slope, and backfilled after construction (see Sheets 4 & 5). Phase, 2 „the construction of the remaining 600' of terminal groin, would be initiated at a future date if the applicant determines conditions warrant the need to extend the structure to the full 1900' ;length. Phase 2 would be further coordinated with the permitting agencies and likely timed with a federal beach disposal project. It is - stated that a construction trestle would likely be required, for Phase 2. The applicant.has stated that the preferred sand source for fillet creation is the remaining portion�of the Jay Bird Shoals borrow site authorized by State Permit 67 -09. The preferred sand source the Village has identified for any needed mitigation on West Beach is the remainder of the Bald Head Creek mouth borrow site, as authorized under State Permit 139 -10. The three segments of the federal inner -ocean entrance channel near Bald Head Island have also been identified as a potential sand source; however, plans, and supporting data for use of this site have snot been submitted at this time. The beach fill project limits could extend .up to 12,600 linear feet in length, from Stations 8 +00 to 1'34 +00, with an excavated volume of'up to ,1.4 million cubic yards of material to be placed on South and West Beaches. The applicant has stated that they intend to leave the 300 linear foot sandbag revetment in place during project construction. Village of BM- Terminal Groin Page Four The Village further,acknowl'edges.some "tuning" or modification of the terminal groin maybe needed in order to comply with the requirements of Senate Bill 110 (as amended by Senate Bill 15 1) and to offset poteiitial,increased erosion on West`Beach Which may result from the terminal groin. The applicant sfates`that- models have shown there-will be "no ,quantifiable impact" on the Caswell Beach/Oak Island side of the,inlet. Surveying commitments and mitigation thresholds,have been described in the Inlet, Management Pian submitted -as part of the application package (see 'attached plan for details). A draft'EIS 'has been'reviewed by the US Army Corps of Engineers (USAGE) and commenting agencies. The fmal EIS has not yet-been released by the USACE. ' -10. ANTICI'PATEDIMPACTS: A The proposed terminal groin construction would "result in the',fill of approximately 75,000 square feet of Public Trust Area and Estuarine 'Waters-below the mean high water line (MH)A). and the fill of approximately 11,000 square feet of unvegetated beach above MHW. The landward portion of the groin (the tie -back section) could also result in the temporary excavation. of up to 5,000 cubic yards' of unvege'tated beach. The fillet creation coula,result in up to 6.9 acres of fill above MHW, approximately -25.3 acres of fill below MHW and the excavation of up to 35.2 acres of Publictrust Area and Estuarine' Waters. Trestle- construction may temporarily impact up to 0.98 acres of- Public Trust.Area andEEstuarine Waters below MHW and up to 0.•11 of unvegetated beach above MHW. The excavation-for possible future beach fill.(likely at-�Jay Bird Shoals) could result in up to 1,24600 linear feet of unvegetated beach fill, or approximately 46-acre's of beach fill. The applicant anticipates that"a properly installed terminal groin will likely decrease the frequency and duration of future;needed beach fill projects and erosion events. Submitted by: Heather Coats Date: July 28;'2014 Office: Wilmington Village of Bald Head Island Terminal Groin DCNR (MP -1) NA UR,E OF AC'T'IVI'T'Y A Public Notice was issued by the Wilmington District, OSACOE on 14 March 20,12 regarding the Village of Bald Head Island's proposal to construct a terminal groin structure. The associated Action ID# is SAW- 2012- 00040. The Corps is evaluating the proposed 'work pursuant to applicable- procedures of Section 404 of the Clean Water Act (33USC 1344) and Section 10 of the River and Harbors Act. The Wilmington District has prepared .a Draft Environmental Impact Statement (DEIS) pursuant to the National Environmental Policy Act (NEPA). The proposed work includes the construction of a terminal groin up to 1,900 ft. in length - -as measured along the centerline of its crest -- as well as supplementary sand placement operations. The project islocated at the juncture of West Beach and South Beach on Bald Head Island in close proximity to the Cape Fear River entrance. The terminal structure will be constructed of large armor rock underlain _by either a rock filled marine mattress and/or a composite filter fabric /geogrid foundation The use of large uniformly shaped • stone, in combination.with a relatively low crest elevation, allows for some degree of desired permeability (or leakiness) to be an integral component of the structure. Permeability in this instance refers to the ability of sand to be intentionally transported over and/or through such a coastal structure at a controlled rate. An important characteristic of'the permeable groin under consideration,at Bald I Head Island is the continued opportunity for spit formation on its downdrift side. Such a spit feature (or sand platform)will be both important and conducive for the continuation of alongshore sediment transport to the , downdrift shorelines laying northward thereof. The fundamental design precepts for -the terminal groin structure proposed for construction at the westerly end -of South Beach at Bald Head Island can be summarized as follows: ® Porosity — the structure should be sufficiently permeable (or "leaky ") as to limit its long- term impoundment of sand thereby reducing potential downdrift impacts commonly associated with impermeable structures. DC-M NC I JUN 1 9, 26 i 12 June 20`14 Village of Bald Read Island Terminal Groin DCNR (MP -1) • Template (length and width) — the direct, as well 'as far -field effects of the groin structure should provide an equilibrated profile or template conducive io the stabilization of the updrift South Beach shoreline sufficient to provide benefit between federal beach disposal events,, i.e., nominally two to three years. The resultant updrift fillet is expected to progressively reduce in width and extent between sand placement events — due to structure permeability. • Elevation —portions of the groin should be sufficiently low such that wave overtopping and resultant sediment transport can occur `through and over the structure's crest during periods of energetic wave conditions. ® Settlement —, the structure should have a foundation designed, to be highly resistant to long -term settlement so -as to substantially reduce future maintenance requirements as well as undesirable changes, in design intent. ® Adjustment — the structure should be capable of post--construction "tuning" if deemed necessary to'refine predicted performance characteristics. ® Constructability — the structure should, be adequately robust so as to resist damage during low probability storm events, but at the same time sufficiently straight forward in design to assure cost - effective constructability in a highly energetic and dynamic environment. ® Phasing — the terminal groin should be capable of being constructed in two (2) phases withoutzcompromising the structure's design intent. An important complimentary activity associated with terminal groin construction at Bald Head, Island is ;the requirement for periodic sand placement sufficient, to provide some level of updrift fillet eastward of the structure both initially and over time. This action is particularly relevant to a permeable groin designed to allow for a controlled release °of:sediment through, or over the structure's crest. The Bald Head Island groin is intended to be constructed in the summer ,of 20.15 following sand placement on Bald 'Head Island pursuant to the Wilmington Harbor Sand Management Plan (WHSMP). Typically, federal beach disposal work occurs between January .and April. That sand, excavated as a result of federal channel maintenance, 2 12 June 2014 Village of Bald Head Island Terminal Groin D'CNR,(MP -,1), would be utilized initially to both improve South Beach and to provide a partial source of fill for the groin's updrift fillet. Since additional sand will be required to complete or maintain thefillet formation, one or moredesignated borrow sources, otherthan - federal disposal materialfrom the channel,will be required. Additionally, since the site specific design precepts established for the termirial structure at Bald Head Island necessitate potential episodic sand placement f6r fillet maintenance,, as well as possible mitigation of downdrift erosion on West Beach, future Village sponsored dredging ,and sand placement .operations may be necessary. The latter necessitates the identification and permitting of readily available sand sources suitable for that purpose. Presently, there is only onelarge scale sand source reliably available for usage both during and after ,groin construction - -a previously permitted (but undredged) segment of a Jay Bird Shoals borrow site.The Jay Bird Shoals borrow site was developed, analyzed and permitted in 2009 for a Village, sponsored beach restoration proj ect; but by design was not completely dredged. Rather, a portion of the borrow site was strategically preserved for potential future use. As axesult, there is a minimum of 1.5 Mcyof readily accessible sand remaining within- the limits of the 240.4-.A borrow area which,was .permitted by CAMA and the USACOE and for which an Environmental Assessment (EA) was performed. Areas within the dredged portion of,the Jay Bird Shoal borrow area whichhave been - subject to physical and biological recovery would not be subject to further excavation under this Permit.A second potential, but_ less' reliable, source of sand is theinner- •ocean,entrance channel of the federal, navigation project whichis comprised of three (3) segments containing beach quality material which has been placed on either Oak Island or Bald Head Island both during and after the harbor deepening project constructed in 2000 /01.Presently, within eaclichannel segment there is on average typically 400'— 600,000 cyof shoal material dredged, every 3 years, mol. It is noted however, that the volume of sand potentially available from this secondary source is dependent upon both the timing and magnitude of the last federal maintenance dredging contract and the potential needs of other parties. In addition, the distribution of sand within the navigation channel may make it costly and difficult to access for fillet and beach maintenance. Both borrow areasidentiRed are well documented as being sources W CIE.) vi�v l U- !4 12June2014 1 Village of Bald Head Island Terminal Groin DCNR (MP -1) of beach compatible material which has been placed on South Beach in the recent past. A third potential candidate site identified for future useby the Applicantincludes the ebb tidal platform ,of Bald Head Creek. The latter sand source was previously utilized for two (2) small scale beach fill projects on BaldHead Island constructed first in 2006 and again in 2012, following Hurricane Irene. It is currently estimated that a northerly extension of the ;previously permitted Bald Head Creek borrow limits — would yield up to 250,000 cy of beach compatible material. As with prior dredging operations at thi's location, the depth of excavation would be `limited to -6ft MLW, mol. Although the extensive Frying Pan Shoal formation located seaward of the eastern end of South Beach (i.e. south of Cape Fear) constitutes a potential future candidate sand source, it will take several years to develop a permitted borrow site at that location. Construction activities directly associated with terminal, groin construction involve the transport of quarried armor stone and marine mattress'which would be offloaded on the north side of the Point where both water depth and sheltering from waves are adequate From there material would be transported -to the groin construction site by 4WD trucks. , In order- to progressively construct the rock groin in a seaward direction, it is probable that the selected marine contractor will need to install a temporary trestfe alongside ,the structure in order to traverse nearshore waters rangmg,up to 10 ft. —.12 ft. in depth. The'latter type of trestle- structure (often seen abutting bridge replacement projects) is usually supported by steel pile which can be easily jetted both into place and subsequently retracted at the, end of the job. Shallow water 'depths in combination with a highly' energetic wave environment in the nearshore project area severelylimit or preclude construction• of the rock groin by barge mounted equipment. An alternate means of staging equipment used fof rock placement is through the use of sand work pads placed alongside the groin's updrift (eastern) side ,as, work progresses seaward. The source of sand for pad construction will be the section of disposal berm (above the MHWL) extending 2,500 ft: eastward of the - groin. Any such" material placed for this purpose is considered to be conducive to updr'ift fillet formation. 4 12 June 2014 Village of Bald Head Island Terminal Groin DCNR (MP -1) Large scale sand placement either preceding or immediately following terminal structure initiation will typically be performed by cutter suction dredge. Sand would therefore be delivered by pipeline to either West Beach or South Beach fill sites from the navigation channel, orthe Jay Bird Shoals/Bald Head, Creekborrow ,sites The filling process would be identical to that utilized for prior beach restoration or beach disposal operationsconstructed at Bald Head Islandsince 2001. If deemed necessary, future mitigation via sand placement, or adjustment to the terminal structure, shall be performed in accordance with the requirements of N.0 S13110, (as subsequently amended by SB 151')or other pertinent regulations in effect, at °the time. Approach to Construction - The Village of Bald Head Island proposes to permit a 'terminal structure extending up to 1,900 ft ± in lengthsouthward, of the existing,seawardmostupland dune line. The project would be initiated subsequent to the completion of a federal beach disposal project constructed eastward thereof in order to maximize benefits to the South Beach littoral system. Additional sand — beyond that placed by the federal maintenance dredging and. disposal to the beach -- would need to be placed updrift ,of the full 1,900 ftlong terminal groinin order to facilitate immediate and complete infilling of the requisite sand fillet 'at the structure. A supplementary sand (borrow) source located at Jay Bird Shoals would be required to dredge and place approximately .5 Mcy of sand needed for fillet creation. The final volume dredged would be determined by beach conditions and the length of groin initially constructed. In order to expedite beneficial post -groin shoreline equilibration conditions (both updrift and downdrift of the structure, as well as some level of formation of sand fillet), the Village proposes to address construction of the terminal structure in two (2) phases. Phase I would first construct the landward two- thirds of the structure's overall design length, more or less, coincident with the next beach disposal, of dredged material from the federal navigation channel. Phase II (if deemed necessary) would, extend, the seaward end of the structure to complete the structure's overall design length, at an appropriately timed future date. 12 June 2014 Village of Bald Head Island Terminal Groin DCNR (MP -1) APhase I structure (currently estimated at 1,300 ft ± in length) would be shorter than the terminal groin's overall, permitted maximum design length, but it is nonetheless deemed sufficient to initiate stabilization of the western limit of South Beach through beneficial shoreline realignment and associated reduction of sediment losses to the inlet. Moreover, the shorter Phase I structure is expected to be more conducive to the timely facilitation of sand bypassing to the downdrift shoreline. Observation and monitoring ,of rates of littoral transport subsequent to a federal beach disposal project (similar in design to that constructed in the Spring of 2013) indicate that the level of expected naturally occurring fillet impoundment for the shorter structure may preclude immediate,sand placement (estimated at about .25 Mcy) from the Jay Bird Shoals borrow site. At the least, a Phase I structure would both reduce the volume of sand required, as Well as- potentially the. timing of updrift fillet enhancement by the Village (if necessary) by ,approximately 6 months to a year. Simplistically, the ,principal benefits of a two, phased approach to construction of a terminal groin are considered to include, but are not-necessarily limited to the following: - © , A Phase I (1,300 ft.) structure requires a smaller sand volume for the updrift fillet. Any dredging associated with fillet construction for a Phase I structure would involve ,less borrow site impact, and would allow the remaining Jay Bird Shoals (1 5 Mcy) sand resource to last longer. o A Phase I structure is comprised of significantly less rock and would therefore take less time to construct. • A Phase I structure may potentially not necessitate the utilization of a temporary construction trestle. • A Phase I structure would have a lower probability of downdrift impact to West Beach because of the mote nearshore location of active sand bypassing through the permeable stem of the rock groin,structure. 6 12 June 2014 Village of Bald Head Island Terminal Groin DCN ,,(MP -1) G A Phase I structure allows for a suitable prototype structure capable of being monitored. The results of such monitoring would be used ,to pragmatically determine the need, timing and preferred physical extent ,of a Phase II structure, however in no event would the terminal,groin structure exceed 1,900 ft. in total length. The Village proposes to initiate construction of a terminal structure immediately following completion of federal beach disposal operation on Bald Head Island -- presently scheduled for 2015. To -date, most federal disposal events take place in the early months- of the year with completion typically before the 1 May sea turtle moratorium. Associated beach disposal _filling activities at South Beach on Bald, Head Island generally proceed from west to east. Certain contract activities associated with terminal groin construction (for either Phase of work) can theoretically begin prior to beach disposal operations. They are principally limited however to stone acquisition, transport and stockpiling at the situ assuming such work can be carried out without conflict to the federal 'dredgmg contract.The active construction of the „groin stem cannot proceed however until updrift beach disposal operations on _South Beach has been completed. The latterrequirement however, allows for sand to be transported westward toward the structure -- thereby minimizing its lee side effects. Moreover, it is likelythat a Phase I groin construction operation -can benefit from ,the creation of sand work pads on the structure's updrift side with the source of ,sand being the federal disposal berm — located within 2,500 ft: of the groin. It is presently estimated -that a Phase I (1,,3 00 ft. long) terminal groin, constructed without the need for a hydraulically placed fillet, will begin in May of 2015 and will. therefore eAtendat least6 months into the 2015 Moratorium. Hence, a Waiver on the typical_ environmental window is required during the summer of 2015. Should a contract be ,required for sand placement for fillet creation from the Jay Bird Shoals borrow site, the latter can be delayed until after 1 November. Sea turtle nesting activities on South Beach occurring 3,000 ft. eastward of the construction site would be unaffected by the proposed activities. All next relocation activities within the contractor's work zone will be performed by the Bald Head Island Conservancy. ' T2 'June 2014 juid 3 2, %L�'t4 - Village of Bald Head Island Terminal Groin. DCNR (MP -1) Any future year Phase II construction contract would have self similar operational requirements — particularly if a construction trestle were required to work in deeper waters seaward of the terminus of the Phase I groin. It is therefore probable that such work would likewise be timed to coincide with federal beach disposal operations --Tor all the reasons stated above. Any future decision to build a Phase II structure with a reduced overall length would obviously reduce the duration of the associated.period of construction for Phase II operations. It is anticipated that the post- construction performance- of the Phase I terminal structure would b&-monitored with respect to its ability to,(a) facilitate sand bypassing to the downdriftf shoreline, (b) reduce the rate of sand loss from `South Beach, and (c) maintain an adequate updrift fillet, and to assess the alongshore extent of benefits derived therefrom. The probability of occurrence, timing and extent of a Phase II construction event would be dictated by the results of the Phase j,monitoring program. It is reasonable to assume that the typical, time required to adequately assess the performance of the Phase I structure would be one to two channel- dredging and beach disposal cycles (i.e. approximately 2 to 4 years). "Initially, both the Phase 'I and Phase II terminal groin lengths continue to 'necessitate the maintenance of the existing South Beach sand tube groinfield located eastward of the -new structure. Ultimately, however, any individual sand -tube groin considered by the Village to be rion- essential or counter - productive `to- terminal groin- performance would be removed or modified. A decision in this regard would be based upon the results of shoreline- monitoring. A post - construction monitoring program for the Phase I structure would consist of biannual surveys intended to quantify fillet volume, spit or platform formations associated with sand bypassing, and the condition of immediate updrift' and downdrift shorelines. In order to facilitate the effort, only minor modifications to the Village's existing comprehensive shoreline monitoring program would be required. More specifically, these modifications would include additional survey fines in the vicinity of the groin structure, the fillet, and the downdrift shorelinne:. The existing biannual controlled aerial photography, program would be continued; however, interim (quarterly) oblique photography would be acquired for purposes of high - frequency qualitative assessments of shoreline conditions. 8 12 June 2014 Village of Bald,Head Island Terminal Groin DCNR (MP -1) Indepth numerical modeling analyses (utilizing _DELFT 3,D) for a 1,300 ft. long (Phase I) structure were specifically performed for ,purposes of comparison with existing model results for the full 1,900 ft. (Phase II) terminal groin ,length. All model scenarios considered both the existence of the sand tube groinfield and the episodic placement of 1.2 Mcy of sand along the South Beach shoreline every three years.. No meaningful differences in downdrift (Point or West Beach) shoreline conditions were predicted' for the reduced Phase I structure length. - As expected, the only predictable difference between Phase 'I and Phase II structure lengths was the spatial extent,of the resultant updrift sand fillet on South Beach. Any decision as to when, and/or how far to extend the Phase I structure would' be closely coordinated with both State and Federal regulatory staff. In no event, however, would the terminal groin`be extended beyond its full 1,900 ft permitted length. A Notice -to- Proceed (NTP) for a Phase II extension would be given by the Village for purposes of notification to all affected agencies, stakeholders and navigational interests. For the construction of a terminal groin updrift sand fillet, as, well asany:near term future maintenance of the beach (in accordance with the disposal tenets of .the WHSMP), the preferred sand, source is Jay Bird Shoals. For either downdrift mitigation (at West .Beach) or small scale sand fillet renewal volumes, the preferred sand _sources would be either the Bald Head Creek borrow -site (as expanded), or portions of the authorized 'federal navigation channel which are shoaled, potentially including some, areas not addressed during routine maintenance operations. For "emergency" type conditions following a major storm event, the Village would propose to dredge available sand from anywhere within the limits of the three (3) identifiable segments of the inner -ocean entrance- channel. The location and volumes of sand available under such a condition would be dependent upon ;the timing and size of the prior federal contract performed for routine navigation channel maintenance, however, a major storm event would in all probability result in accelerated rates of channel shoaling. In the long term, anew "primary" borrow source would need to be developed within Frying Pan Shoals. Both geotechnical and Cultural Resource investigations as well as an 9 12 June 2014 ,�A Village of Bald Head Island Terminal Groin DCNR (MP -1) Environmental Assessment would be required. This sand source would eventually be utilized to supplement federal beach disposal activities (pursuant to the WHSMP) and to provide any future ,sand required to- maintain- a fillet updrift of a terminal groin, as well as address potential large scale storm impacts to the shorefront of Bald Head' Island. It is estimated that the development 'of such an alternate'bortow site would need to occur some `3 -years or more (but before 12- years) subsequent to the Phase I terminal groin construction. The time required to develop �a second major borrow site is estimated at 24 — 36 months, mol. In general, the purpose of the proposed terminal groin is to stabilize the westernmost segment of South Beach on Bald Head Island. At that location, chronic shoreline, erosion threatens both public and private infrastructure as well as various environmental resources. Since 1995, prior efforts at stabilization comprised of a 16 structure sand tube groinfield, as well as large and small scale episodic sand placement projects, have been unsuccessful in achieving the project purpose. More specifically, the proposed terminal `groin is intended to enhance stabilization of the beach 'by limiting the rapid loss of fill material that presently occurs at that location through a' reduction. -in ,the rate of sand transport from the island - toward - the inlet. As such, the introduction of a terminal groin represents a new - dynamic affecting existing conditions Which includes the goal of reorienting the westernmost segment of South-Beach shoreline. The placement 'of sand concurrent with, or immediately prior to, the installation of a terminal ;groin will significantly reduce the volume of material which would otherwise be removed from the island's littoral system by the impoundment characteristics of such a structure. Long -term benefits of the groin would include overall reduced shoreline erosion along South Beach which may in turn potentially lower the rate of sedimentation (shoaling) within the federal navigation channel. Any meaningful reduction in the annualized rate of net sediment transport along, western Bald Head Island requires some level of reorientation of the shoreline closest to the federal navigation channel. The added stability afforded to directly, placed (or strategically impounded) 10 12 June 2014 Village of Bald Head Island Terminal Groin DCNR,(MP -1,) sand by a terminal groin makes shoreline realignment feasible relative to alternative methods of stabilization previously employed at this location. As historically demonstrated, sand placed as an unstabilizedbeachfill is quickly eroded along the westernmost segment of South Beach. In contrast, a terminal groin will serve as ,a "template" for comprehensive sand fill' projects placed eastward thereof, thereby reducing the rate of sand losses to the inlet, allowing for a more stable shoreline orientation, improved long -term fill project performance and resultant protection of upland property and infrastructure. The desired performance characteristics for a,terminal structure as proposed at Bald Head Island can be summarized as follows: o Reduce annualized sediment transport rates from the westernmost segment of South Beach to the Cape Fear River via realignment of the Island's southerly shoreline nearest the navigation channel; ® Establish an updrift (easterly) sand impoundment fillet eastward of the terminal groin which serves to. protect some level of endangered residential structures as well as public infrastructure (i.e. the Bald Head Wyndroadway and abutting subgrade utilities). © Incorporate design features into the terminal structure which minimize the potential for adverse impacts to a.downdrift shoreline (i.e., the Point and West Beach) both of which are presently highly dynamic and erosional; o Help protect portions of an important upland evacuation route which parallels South Beach; m Protect and stabilize beachfront and dune fields along the western end of South Beach (thus enhancing their value, for recreational' ,use and storm protection along with their function as' endangered species habitat); ® Provide potential benefits .to an adjacent federal navigation project via reduced shoaling; • Preclude impacts to the existing regional sediment budget, as well as other coastal barrier islands; • Require little to no structural maintenance;' 40; 1,' 12 June 2014 Village}of Bald Head Island Terminal Groin DC-14R (MP -1) © Minimize or reduce future maintenance requirements for portions of 'the existing sand tube groinfield located along South Beach; ® Provide an improved beach condition conducive to the extension of the effective life and benefit level associated with future sand placement projects (updrift of the structure) that - are implemented by either the Village or by the USACE. o Utilize existing supplementary sand source(s) for initial construction, fillet restoration and/or mitigation from area(s) determined to result in negligible long term environmental or physical impacts.For example, each of the three (3) candidate borrow areas identified for near term use have been dredged and placed as beach fill in the recent past (Le. since 2000). REASONS FOR DISCIIARGE The construction of the proposed terminal groin will be directly keyed to the timing of the next federal beach disposal project constructed, at Bald Head' island. The latter is presently scheduled for, spring of 2015. It i" the intent of the Applicantto- coordinate with the Wilmington District, COE engineering staff regarding, the actual placement design for the next federal disposal project so as to a.) maximize sand impoundment both at/and eastward of the terminal groin, and b.) to maximize the width of the fill, berm and'interti~dal,beach sufficient to assist in groin construction operations. Additional sand placement by the Applicant may derive from the following requirements: 1. `The need to augment,fillet formation resulting from a federal disposal project. This work would be performed immediately following terminal groin construction._ 2.. The need to.maintain an appropriately sized updrift fillet over time, and r 3. The potential need to mitigate_ shoreline erosion which may be either caused by the,groin, or which may occur in, the vicinity or downdrift of the groin, but from natural causes, or other man- induced activities. 12 12 June 2014 Village of<Bald Head Island Terminal Groin DC-NR (MP -1) The Jay Bird Shoals borrow area, an expanded Bald Head Creek borrow area, and the three segments of the-federal inner -ocean entrance channel limits of work routinely maintained, by the U.S. Army COE, shall comprise the near ternihighest priority sand source(s)for the three uses described above. The three Federal navigation channel ,segments which routinely result in the excavation of beach quality sand are defined as Bald Head Channel Shoals 1 & 2, and the Smith Island Channel. Two (2) other project related sources of material to be "discharged" (or placed) into the waters of the State include both armor rock and rock filled marine mattresses utilized for the groin's foundation. All stone specified will be granite sourced from an,inland quarry. The stone will be transported to the island by barge and offloaded and stock - piled. Rock placed within the structure- cross - section — above and below the MHWL will be by crane, backhoe, pay - loader, etc. The construction of a temporary work trestle, and/or the formation of sand work pads placed seaward of the MHWL alongside the structure, likewise need to be considered part of the permitted construction operations. That sand source shall be the, upland portion (above the MHWL) of the federal disposal berm located within2,500 ft. of the rock groin. ita,,tti� 1 '?li_IMI.ITN: ii N 1 13 12 June 2014 = 04 A N low, = L• "f ti h. ms's m u .:a. ``l.tr:.r/ 4 £ Village Of Bald Head Island VBHI - Terminal Groin Applicant 1 First Name MI Last,Name Misr N 0-W 1 Y permit (Iasteevised 12127/06) MI Last Name Carolina OF COASTAL 1, P, rimiRry.Appiftant/ Landowner information' Busmess9Name Project' Name (if applicable) Village Of Bald Head Island VBHI - Terminal Groin Applicant 1 First Name MI Last,Name ,Chris McCall Applicant 2 First Name MI Last Name If additional applicants, please attach an additional'page(s) with names listed Madrng;Address PO'Box City, State P O Box 3009 Agent% Contractor Flrst'Name Bald Head Island NC ZIP Country Phone No FAX No 28461 USA 910- 457 -4926 - - ext 910 -457 -.6206 Street Address (if different from above) City State ZIP Email cmecall @villagebhi org 2. Aggent%Cohtracgoi,f' f'orihagion. y j Business Name Olsen Associates, Inc Agent/ Contractor 1 First Name MI Last Name Erik J dl'sen Agent% Contractor Flrst'Name MI ;Last Name Mailing Address PO Box City State 2618`Herschel Street Jacksonville 'FL ZIP Phone No 1 Phone No 2 32204 -4512 904 — 387 - 6114 ext 321 - - ext FAX No Contractor # 904 384 7368 NA Street Address (if different from, above) City State ZIP Email eolsen @olsen - associates com RECEIVED <Forrn continues on back> JAKi 2 1 19- is :...� 4: Pb �.. ' � 4 � � � . � C# V P✓ • L`t 3.% � e �i.L r�� F� � .. r:t� itV �'i .. � t� r, i t t:. �9 ['1 ..J ih is 'i`il ems, '�1 L . u E l= t. Form DCM MP -1 (Page 3 of 5) APPLICATION ,for Major Development Permit 3; = Project Location County (can be multiple) Street Address State;Rd #- Brunswick 'NA NA Subdivision Name City State Zip NA Village of Bald Head Island NC 28461- Phone No Lot No,(s) (if many, attach additional, page with list) 910 - 457 - 4926 ext NA, a In which NC aver basin is the project located? b- Name of body of water nearest to proposed project Cape Fear River Cape Fear River c Is the water body identified�in (b) above, natural or manmade? d Name the closest,major water body to the proposed, project, site ®Natural ❑Manmade []Unknown Atlantic Ocean e Is,proposed work within,city limits or planning jurisdiction? f If applicable, -list the,planning jurisdiction_ or city lima the proposed ®Yes ❑No work.falls within How does local government zone the tract? Village of Bald Head Island 4. ✓Site'DescripdoJ-, a Total length of shoreline on the tract (ft) b Size of entiretract (sq ft) 12,600 NA c Size of individual lot(s) d Approximate elevation of tract above NHW (normal, high .water) or NA, I NWL (normal water level) , - (If many4ot sizes, please attach additional page with a list) +8ft ❑NHW or ®NWL e Vegetation on tract Limited-salt tolerant vegetation (sea oats, panic grass, etc) r f Man -made features and uses now on tract Sand tube groins (16) Beach Fill Manmade dunes Sand bag revetment(s) g Identify and describe the,existing land uses adiacent to the proposed project site Residential and public infrastructure (road, sewer, water, etc) h How does local government zone the tract? i Is the proposed project consistent with the applicable zoning? - N_ A = (Attach zoning compliance certificate, if.applicable) ❑Yes ❑No ®NA j Is the proposed activity part of an urban waterfront redevelopment proposal? ❑Yes ®No k Has a professional archaeological assessment been done for the tract? If'yes, attach a copy ®Yes []No ❑NA If'yes, by whom? Tidewater - Atlantic Research; Inc I Is the proposed project located in a National Registered Historic District or does,it involve a ❑Yes ®No ❑NA National Register listed or elrgible,property? <Form continues on next page> RECEIVED WILMINGTON, NC JAN 2 11 Z014 2152;P- '30 & -'!ZC8 ? dpk' -.E XCDA3 11s k' v3' s'4�.n't6- E, 1er_, =L o seeni SET L'ae Form DCM MP -1 (Page 4 of 5) APPLICATION for Mayor Development Permit m (Q Are there wetiands,on the site? ❑Yes ®No (n) Are there coastal wetlands on the site? ®Yes ❑No (w) If yes to either (i) or (n),above, has a delineation been conducted? ®Yes ❑No (Attach documentation, if available) n Describe existing,wastewater'treatment facilities NA o Describe,existing drinking water supply source NA ,p Describe existing storm water management or treatment systems NA 5, iIdiyifies ar►al lmpacgs. a Wilbthe prolecfbe for commercial, public, or private,use? ❑Commercial ®Public/Government ❑Private /Community b Give a brief description of purpose, use, and daily operations of the project,when complete Construction and maintenance of a termmal,grom Sand placement as necessary both initially and in the' future to construct and maintain a sand'fillet Downdrift mitigation if,,-necessary, c Describe the proposed construction methodology, types of construction equipment to be used during construction, the number of each type of egwpmenttand where it�is to be stored Groin'to be constructed, of rock Material will be brought to BHI by barge, off loaded and transported to work site by 4WD- trucks, Work will involve payloaders, backhoes, cranes, etc A temporary work trestle for work.seaward'of the MHWL may be required Sand placed asswork pads along the,groin may hkewise',be required d List all development activities you propose Construct a terminal groin Place supplementary fill =as required for structure fillet' construction (or maintenance) and /or mitigation -- if necessary _ e Are the proposed activities? ma inten ance of�an existingxproject ;,new work, oriboth� New work f What is the approximate total disturbed land area resulting from the proposed project? 50A,- initi6lly ❑Pq'Tt or Acres g Will the proposed project encroach on any public easement, public accessway or other area, ❑Yes ❑No ®NA that,the public has established use of? h Describe location and type of existing and proposed discharges to waters of the,state Sand placement (by dredge or mechanical means) will occur seaward of the MHWL Placement'of -armor rock,and rock,filled marine mattresses ,A temporary steel pipe supported work trestle Sand work pads alongside groin required for equipment operations i Will wastewater or stormwater be discharged into a wetland? ❑Yes []No ®NA If yes, will this discharged water be of the same salinity as the,receivmg,water? []Yes ❑No ®NA I Is there any =tigation proposed? []Yes ®No - ❑NA If yes, attach a mitigation proposal RECEIVED ww1v1 VVIL.IV111tlV t VIV,IV4 <Form continues on back> JAIN 2 12 0, 14 2 br S'i'3 —_2SC S `i %.. e >%• ���Wv��. ��"l'' � k. 6`J= "� s`_, r LC.' � Tr,a1F5d1 1ltwti,�r��5, Form DCKMP -1 (Page 5 of 5) APPLICATION for Major Development Permit 6. AddidonalInformadon In addition to this completed application form, (MP -1) the following items below, if applicable, must be,submitted in order for the application ,package4o be complete Items (a) — (f) are always applicable to any major develcpmentapphcabon Please consult the application instruction booklet,on how to properly prepare the required items below. a A project narrative b_ Anaccurate, dated work plat (including plan view and cross - sectional drawings) dawn to scale Please give the present status of -the proposed,project Is any, poition already complete ?' If, previously authorized work, clearly indicate on maps, plats, drawings to distinguish between work completed and proposed F e c A site or location,map fhat:is,sufficiently detailed to, -guide agency personnel unfamiliar with the area to the site. d A copy of the deed (with state application only) or other instrument, under which, ihe,applicant claims,title to the,affected properties. The appropriate application fee Check or money. order made payable to DENR. f. A list of the names and complete,aildres §es of the adjacent waterfront (riparian), landowners and signed returnirecelpts as proof that such owners have received a copy of the application and,plats by,ceitified mad Such landowners must be advised that they have 30 days in which to submit comments on the proposed, project to the Division of Coastal Management Name See, Attached Llstirig Phone No Address 'Name Phone No. Address Name Phone No Address g A list of; previous, state or federal, permits issued for work on the project tract Include permit numbers, permittee, end issuing dates. CAMA -67 -09 (2009), COE- 2007 -02699 (2009), CAMA - 139 -10 (2010) COE 2009 - 02334(2010), LAMA 9 -95 (2009); COE 199404687 (2009) — Permittee is VBHI h Signed consultant,or agent authorization, form, if applicable I ,Wetland delineation, if necessary. - j A,signed AEC hazard notice for projeets,in oceanfr`onVand inlet areas (Musfbe signed by'property owner) k A,statement of corriplianoe with the N.C_ Environmental Pollcy Act (N C G.S. 113A 1 -10), if necessary. If the project,involves expenditure of,public funds or use of public lands, attach a statement documenting compliance with the North Carolina' Environmental' Policy Act 7 Certification and Permission to Enter on Land ' I understand that-any" permit issued in response to this Application will allow only the development described in the application. -The project will be subject to,the conditions and restricti6ns contalried in' the permit I certify that I am authorized to grant, and do in fact grant permission to representatives of state and federal,review agencies to renter on the aforementioned, lands in connection: with evaluating information related'to this permit application and follow -up monitoring of the project: ,I further certify that the information provided in this application is truthful to the best of my knowledge: Date 31 3 V L 2013 Print Name G r;+Rrs MlGGA LL. Signature Please indicate application attachments, pertaining to your proposed project ®DCM MP -2 Excavation and Fill, Information ❑DCM MP -5 Bridges and Culverts ❑DCM MP -3 Upland Development ®DCM MP-4 Structures Information XMIW��MINOTON, NC Form DCM MIS -2 (Except for bridges and culverts) Attach this form to Joint.Application for CAMA Mayor Permit, Form DCM MP -1 Be sure to complete all other sections of'the Joint Application that relate to this proposed;project Please include aWsupplemental information Describe below the purpose of proposed excavation and /or fill activities. All;values should be given in feet: 9 FXCAV.4TlOA!' r ; p Thrs °secfron ^ Hotta pPhcablet_` a, Amount of material to be excavated from below�NHW or -NWL- in •`b Type of;matenal to,be,excavated cubic^ yards b_ each, compatible sand 14 Mcy - c: (i) Doesithe area to be excavated include,coastal wetlands /marsh Access (CW) submerged aquatic vegetation (SAV),, shell, bottom, (SB), 'NTE - 5,000 cy during groin construction or other wetlands (WL' )? If any boxes are checked, provide the number,of square feet affected Other ❑CW ❑SAV ❑SB Channel (NLW or Canal Boat Basin Boat Ramp Rock Groin Rock Breakwater (excluding shoreline maintain the terminal groin fillet NWL) ,2. ®ISPOSAL. OF EXCAI1 TED,�lL4 TERG4L, - •• _ - �,. t , [Ej Tis s ^r i °H h_e "cfion rid, apphcatile" w b Dimensions of dispo§al,area - Oceanfront and riverfront shorelines stabilization C (i) Do you claim4itle to disposal area? d (i), `Will a disposabarea be available for future maintenance ❑Yes ❑No ®NA ❑Yes ❑No ®NA (n) If no, attach a letter granting, permission from the owner (u) Ifyes, where? e (i) Does,the ^disposal area include any coastal,wetlands /marsh f (i) Does,the disposal include,any area in the water? Length EYes []No ❑NA or other wetlands (VVL),7 If any boxes^are checked, provide the (n) If yes, how much water area is affected number of square feet affected 1,900 ft OCW ❑SAV ❑SB Vanes UpAo 50A,(Fillet only) Width (n),Descnbe the purpose of disposal in these areas RECEIVED Beach fill construction Terminal groin fillet construction and 100 ft maintenance Avg. Existing NA NA" Depth 1 , _ Final Project NA ' Depth } F 9 FXCAV.4TlOA!' r ; p Thrs °secfron ^ Hotta pPhcablet_` a, Amount of material to be excavated from below�NHW or -NWL- in •`b Type of;matenal to,be,excavated cubic^ yards b_ each, compatible sand 14 Mcy - c: (i) Doesithe area to be excavated include,coastal wetlands /marsh d' High - ground' excavation in,cubic yards (CW) submerged aquatic vegetation (SAV),, shell, bottom, (SB), 'NTE - 5,000 cy during groin construction or other wetlands (WL' )? If any boxes are checked, provide the number,of square feet affected ❑CW ❑SAV ❑SB OWL ®None (n) Describe the purpose of the excavation in these areas To provide, a, source of beach °fill both initially•and,overtime To maintain the terminal groin fillet ,2. ®ISPOSAL. OF EXCAI1 TED,�lL4 TERG4L, - •• _ - �,. t , [Ej Tis s ^r i °H h_e "cfion rid, apphcatile" a Location of disposal area b Dimensions of dispo§al,area - Oceanfront and riverfront shorelines 12,600 ft,m length C (i) Do you claim4itle to disposal area? d (i), `Will a disposabarea be available for future maintenance ❑Yes ❑No ®NA ❑Yes ❑No ®NA (n) If no, attach a letter granting, permission from the owner (u) Ifyes, where? e (i) Does,the ^disposal area include any coastal,wetlands /marsh f (i) Does,the disposal include,any area in the water? (CW), submerged aquatic vegetation (SAV), shell bottom,(SB), EYes []No ❑NA or other wetlands (VVL),7 If any boxes^are checked, provide the (n) If yes, how much water area is affected number of square feet affected r OCW ❑SAV ❑SB Vanes UpAo 50A,(Fillet only) OWL ®None (n),Descnbe the purpose of disposal in these areas RECEIVED Beach fill construction Terminal groin fillet construction and DCM'WILMINGTON, NC maintenance Fo,; rin, DcRis �iy(s P -G= PJr t, R *'t 2t i lkORELINE SMBILIZATION pThrs sectton'not applicable' (If development'ts•a -wood groin, use.MP - -4 — Structures) , a i,ype or snoreune,sraomzauon ❑Bullhead ❑ Riprap ❑Breakwater /Sill ®Other gM c Average distance waterward of NHW or NWL 700 - 800 ft e Type of stabilization material Armor rock, rock filled^manne mattress' g Number of square feet of fillito be placed below water level Bulkhead backfill Riprap Breakwater /Sill Other, 2M I Source of fill material Navigation channel or Jay Bird Shoals, quarried rock b Length 1.9UU Width 100 d Maximum distance waterward of NHW or NWL 700 - 800 ft , mol f (i) Has there been shoreline erosion,during preceding 12 months ?' [Ryes []No ❑NA (u)' If yes, state amount of erosion arid'source of erosion amount information 300,000'cy /yr average, islandwide annual monitoring program h, Type,of fill material Clean beach compatible sand, quarried rock „ OTllE/a,FALL' ACT %VITIES EThissec_tionno_tapplrcab/e, _ (Ezcluding,Sho�eline Stab�hzat(on)t t x Y �.k Z Ate- - a (i) Will fill material be brought to,the site? []Yes ❑No ❑NA b (i) Will fill material be, placed in coastal wetlands /marsh If yes, (u) Amount of material to,be ,placed in,the water 1 4 Mcv (iii) Dimensions of fill area 2 M sf (iv) Purpose,of fill Construction and maintenance of fillet eastward of groin Work pads Mitigation if necessary, 3. GEAIERAL. = a How,will excavated or fill material be kept on site and erosion controlled? Terminal groin will reduce existing rates of erosion c (i) Will navigational,aids be required as a result of the project? ®Yes []No ❑NA (u) If yes, explain what type and how they -will be implemented Pile supported warning signs•alongside terminal groin submerged aquatic,vegetation (SAV), shell bottom (SB), or other wetlands (WL)? If any boxes are,checked, provide the number�of square-feet affected , , ❑CW ❑SAV ❑SB` ❑WL ®None (u) Describe the purpose of the'fill in these,areas b What type of construction equipment will be used (e g , dragline, backhoe, or hydraulic dredge)? Hydraulic dredge, dozers, backhoe, crane d (i) Will wetlands be crossed in transporting equipment,to project site? ❑Yes ❑No [DNA (u) If yes, explain steps that will be taken to,avoid onminimize environmental impacts w Village of,1Baid Head Island Date Applicant• VBHI - Termianal Groin Protect ApplicantSignafu i.'y.T.o 'RECEIVED Project Name CCM,WILMINGTON „NC AN 211 2414 '.-%„.;°6” r >�E� ;;i:k��C, ., i••�.•ia� ^� {`CF.p�.L�t�. , u'' c'' ti�95h3�E' ��Cvc. Ssci; 6f7c`a[���I.F?'G &S'J�EGi.[rOc36 aC- ii6u�C�.: 'I(f�'.. /�f� /�.T'u Form D C MP-4 S T Y Y y1E !� ^y.Ym U 1 E.,yam Attach`this form to Joint Application for'CAMA.Major Permit, Form DCM' MP -1 Be sure to complete all other sections of the Joint Application that;relate,to this proposed project, Please include all supplemental information 9. DOCKING' FACIL,ITYIMARINA CIIARACTERIST ICS -- - 'ETtiis,se'ction; not,applicable- - a (i) Isthe'docking facility /marina b (i) Will'the facility,be open to the general public? ❑Commercial ❑Public/Government ❑Private /Community ❑Yes ❑No c '(i) Dock(s) and /or pier(s) (u) Number (w) Length (iv) Width (v) Floating ❑Yes ONO, e (i) AreTlatforms included? ❑Yes ❑No If yes (u) Number (m) Length (iv) Width (v) Floating ❑Yes ❑No Note Roofed areas are calculated from drnplrne dimensions g (i) Number of slips proposed (u) Number of slips,existing i Check the proposed type of siting ❑ Land cut and access channel ❑Open water, dredging,,for basin and /or channel ❑Open,water, no dredging required ❑Other, please describe k' Typical'boat length m (i) Will the facility have tie,pilmgs? []Yes []No (u) If yes number of tie pilings? d (i) Are Fmger'Piers included? ❑Yes ONO If yes (u) Number (m) Length (iv) Width (v),'Floating []Yes ❑No f (i) Are Boatlifts included? ❑Yes ❑No If'yes' (u) Number (m) Length (iv) Width h Check all the types of "services to,be provided ❑ Full service, including travel hft,and /or rail, repair or maintenance service ❑ Dockage, fuel,,,and marine,supplies ❑ Dockage ('wet slips") only, number of slips ❑ Dry storage, number of boats ❑ Boat ramp(s), number of boat ramps '❑ Othef;•please;describe ,j Describe the typical boats to be served (e g , open runabout, charter boats, sail boats, mixed4ypes) I (i).Will the facility be open to the general publics []Yes []No RECEIVED DCM WILMINGTON, NC II ��s�'- r`'".°�'4i���`,^vi:�'`�`' . ``'`��w:��t li'�'''�'l r.°.'.���li �- 'iz°'L@:'t*`+W Qi'E �'-fr `�G�',.`a7'�i^3�C^ ?'vat. -S Ce"^.�(�'�`..-h t'�'��',�L4:,, G`tl�"' �•�+a: n �F?+a5o 'd -� /'� r` %S✓� t`-.7'.'Wg 1y5C'BiR., li UP-4s � i�,6'F ?,�� ".v7 P�:..�.ros r"i�1Qfd' 2 ere $u Z DaibkiN-G'FACILirylItARiNA sooRATioN�§ ' a Check each ofthe,followmg(sanitary facdities',that• will, be included imthe ;proposed project ❑ Office Toilets '❑'Toilets for patrons, Number Location ❑ Showers ❑ Boatholding tank pumpout, Give type and location b Describe treatment type and disposal location for all sanitary wastewater c Describe the disposal of solid waste, fish,offal and trash d How will overboard discharge of sewage from boats be controlled? e (i) Give the location and number of "No Sewage Discharge" signs proposed (u) Give the,location and number of " Pumpout Avail able" signs proposed 9This section not, applrcableF ; f Descnbe,the +special design, if applicable, for containing industrial type „pollutants, such as,paint; sandblasting waste and petroleum products, g Where will residue from vessel maintenance be disposed,of? h Give the number of channel,markers,and "No Wake” signs proposed i Give the location of fuel - handling facilities, and describe the safety measures planned to protect area water quality t What will be,the marina policy on overnight and live- aboard dockage? k Describe design measures that promote boat basin flushing? I If this,project is amexpansion of,an existing manna, what types of services are - currently provided? DCM WILMINGTON, NC m Is +the manna /docking facility proposed withima primary or secondary nursery area? ❑Yes ❑No JAN 2, ' 2014, ��sG ^`^i'.vgn^ En., j^ <.s' ^S�d w�4f''a `. : �? ^r'i"viP.2��4'�8i54.c�5'L "e^• 2f �9't'9erig. ray 70vise"C$:12/27106 ' ..�^. � � . n_ Is the marina/docking facility proposeb within or adjacent to any shellfish harve.iting, area? OYes, Qmu o m the maxmmovom"y facility adjacent ~ coastal r~~~'~~^~'~,,`^— submerged aquatic vegetation (S/0 shell bottom (Go).o, other wetlands (mL)r |fanyluoxeoone'cmevxou.'pn6'vide the number orequamfee'aoeoteu Omw ___ USAw Use []VVL ___- LJNone ` ' P |s,the proposed marina/docking facility located within n, within close proximity many shellfish leases? E]Yes ONo If yes, give the name and address of the leaseholder(s), and,give the proximit� to the lease a Q) Is the boathouse structure(s) (u) Number (in) Length V0{Nidth � Note Roofed areas are calculated from umnlinedimensions � - � � . e 0 Number � omLengm (iiiyVVidth u Maximum distance beyond NHVV NVVLor-vetlando . - 6. MOORING PILINGS affdOUOYS atmS46chon 'hot apphc6b er- a bum ` OCommercm O o Distance bbe'planed beyond shoreline _____ Noun This should bo measured from marsh edge, Ifpresent o Arc of the,sw� 7. GENER AL, m Number d Description of buoy (c*|nr, inscription, size, anchor, etc) � ~ QCM WILMINGTON., NC JAN' Pi � �06& . .r'�''---~'~ 4d R 7o- ie� 4 s °��aG -�., ���Cc lr6e. .z�� (��i1;('W'�lYC�Cfv�; )��a,�j4� +�* (�'n 61,1i a Proximity of structure(s) to adjacent riparian property lines NA Note For buoy or mooring piling, use arc of swing including length of vessel c Width of water. body NA e (i) Will =navigational aids be required as a result of the project? ®Yes ❑No ❑NA (u) If yes, explain what type and how,they will be implemented Pile supported warning signs b Proximity of structure(s) to adjacent docking facilities NA d Water depth at waterward end of structure at NLW or NWL -10 A 8. 'OT%OEI- a Give complete description Temporary'steel pile work trestle To be removed at time of completion of ter "urinal groin RECEIVED DCM WILMINGTON, NC JAN 2T, ��= ��Et� -a���� _. e����m�L2��r�,vi�', ,:- J' �Lrrzc��v�r� .�.�csa�?rn��aes��ea�a�;c� a�+o,use�: •,j�l?alr��, 9n - Village of,Bald'Head;Island=- :Terminal _Groin Project: Nanie. Apple Signat RECEIVED DCM WILMINGTON, NC JAN 2T, ��= ��Et� -a���� _. e����m�L2��r�,vi�', ,:- J' �Lrrzc��v�r� .�.�csa�?rn��aes��ea�a�;c� a�+o,use�: •,j�l?alr��, VILLAGE OF BALD MEAD ISLAND, NC TERIVUNAL GROIN PROJECT INLET MANAGEM ENT TAN d. SETTING 17 July 2014 In order to comply with the requirements of .SB 1 -10 (as subsequently amended by SRI 51), an applicant for a permit to construct a, terminal groin-must formulate, a plan for the "management of the inlet and the estuarine and ocean shorelines immediately adjacent to and under the influence of the inlet. The inlet management plan monitoring and mitigation requirements ,must be reasonable and not impose requirements whose costs outweigh the benefits. The inlet management plan is not required to address sea level rise. The inlet management plan shall do all of the following relative to the terminal groin and its accompanying beach fill project- a. Describe the post - construction activities that the, applicant will undertake to monitor the impacts on coastal resources. b. Define the baseline for assessing any adverse impacts and'the thresholds for when the adverse impacts must be mitigated. C. Provide for mitigation measures to be implemented if adverse impacts reach the thresholds defined, in the plan. 'd. Provide for modification or removal of the terminal groin, if the adverse, impacts cannot be mitigated." G.S. § 113A- 115.1(e)(5). On Bald Head Island, the section of shorefront subject to continuing monitoring and impact analysis as a down'drift shoreline potentially subject to structure induced damage and resulting mitigation is West Beach. On the Oak Island side of the inlet, the section of shorefront subject to similar project related monitoring is the Fort Caswell oceanfront shoreline from Sta. 60 to Sta. 30. The latter is under the influence of the inlet — but outside the limits of sand disposal routinely performed by the Wilmington District,, USACOE- at, Oak Island. Inlet management plan formulation will be significantly, different for an inlet improved for commercial navigation versus ,one which is in a relatively unimproved condition or which provides only for recreational navigation. Also - influencing various potential management RECEIVED DCM WILMINGTON, NC I Olsen Associates, Inc. JUL 1 7 2014 17 July 2014 precepts is the size of the inlet, its history and any associated sand disposal operation(s) which presently benefits one, or both, of the abutting coastal barrier shorelines. That is to say, beneficial inlet management must involve multiple considerations. Such is the case with the entrance to the Cape Fear River where a proactive Sand Management Plan has been in effect for over a decade. The subject Wilmington Harbor Sand Management Plan (W,HSMP) is implemented by the Wilmington District, United States Army Corps of,Engineers ( "USACOE ") during routine maintenance of the innermost three (3) segments of the 'Ocean Entrance Channel (Smith Island Reach and Bald Head Reaches 1 and 2) which comprise , a portion of the Wilmington Harbor Navigation Project. Until 1999, the, Wilmington Harbor navigation project had historically not included the disposal of littoral sand on the adjacent beaches, or in the active littoral zone. This had -been primarily due to the maintenance practices that were established with the inception of the project in the late 1800's. As a result, standard practice for maintaining the ocean entrance channel segments of'the project was offshore disposal in water depths of 30 feet or more. With the last harbor deepening project and coincident reorientation of the,ocean entrance channel, the Wilmington.District established a new standard for the disposal, of littoral sediment. From�an engineering,perspective, a purpose of-the Wilmington.Harbor maintenance program was to avoid or mitigate potential erosion of the adjacent beaches by conserving the limited natural resource, sand, through`deposition directly on the adjacent coastal barrier beaches. 'Pursuant to the adopted Plan, the initial ratio of distribution of littoral sand excavated during routine maintenance operations between Bald Head Island and East, Oak Island — Caswell Beach was proposed by the District, in the ratio,-of two- thirds to one - third, respectively. The WHSMP was initiated as part of the -first maintenance project following initial improvements of the deepening, project. Beach quality sand originating, from project widening, deepening -and channel reconfiguration was likewise distributed between the:two islands -with sand being,placed on Oak Island, as far westward as Holden Beach. It ,did not however include the Fort Caswell oceanfront shoreline. In addition, the N.C. Beach and Inlet Management Plan (BIMP) established for Region 1 — Brunswick County, specifically earmarks the use of Jay- Bird Shoals and Middle Ground at the 'Cape Fear River Entrance as borrow areas for Region 1 shore stabilization projects — and -in particular for Bald Head Island given its proximity to the two depositional features. The 'latter are predominately comprised of beach quality material. 2 Olsen Associates, Inc. 17 July 20.14 The Cape Fear River Entrance is a historically federally improved tidal inlet which includes a deep draft commercial navigation project channel authorized by Congress intended to serve the Port of Wilmington Harbor, N.C. Both the inlet's interior flood shoals, the exterior ebb shoals, as well as portions of the navigation channel which are subject to shoaling with beach quality sand; all serve as potential, sand sources necessary to meet the performance requirements of SB 110 (as amended) regarding terminal groin mitigation — as well as supplemental beach fill necessary to prefill a terminal groin. Depending upon the ,timing of groin construction, the regularly'scheduled disposal of large quantities of high quality sand (typically 1 Mcy per event, or more) associated with the WHSMP offers the opportunity for the applicant for a terminal groin permit to strategically schedule groin implementation in, such a manner so as to utilize beach disposal sand to meet, or at least supplement the initial beach fill requirements of the enabling terminal groin legislation. This would not however, - obviate potential alternate ,sand source requirements associated with long -term updrift fillet maintenance, downdrift mitigation at West Beach, etc. H. PHYSICAL MONITORING PLAN A. Existing Monitoring Programs The Village of Bald Head Island, NO (Village) has performed comprehensive beach monitoring of South:,Beach, the Point and West Beach since 1999. Prior to that date, less formal surveys of the "dry" beach (only) were also accomplished at varying dates in time. In 2008, East Beach was added to the current Village monitoring plan., In 1 °999, the Wilmington District USACOE likewise `initiated physical monitoring of ,Oak Island and Bald Head Island shorelines — prior to the construction - of the last authorized channel deepening project. Elements of the present day federal survey program under the WHSMP have also included portions of the ebb shoal delta as well as annual condition surveys within the federal navigation project. Borrow sites have likewise been monitored by the Village for a minimum period of 3 years after any non - federally sponsored dredging project required for shore protection. Borrow site monitoring typically includes both physical and biological surveys. A detailed Island -wide Monitoring Report is issued annually by the coastal engineering firm Olsen Associates, Inc., on behalf of the Village, which generally addresses: 3 , Olsen Associates, Inc 17 July 2014 1. Recent volume and shoreline position changes measured over the prior twelve (12) months. 2. Comparisons of existing and long -term conditions relative to pre -fill conditions documented since November 2000 by annual surveys. 3. Discussions of the performance of each last major sand placement project, (federal as well as non - federal). 4. Recent navigation channel changes including those at/or abutting the Point — an area of chronic shoaling and highly dynamic shoreline change. 5. Commentary regarding'borrow site recovery (physical and biological) for three years following each Village sponsored dredging contract Long -term average annual shoreline change rates (1938 -2000) for Oak Island/Caswell Beach portray, for the most part, a highly erosional condition, averaging slightly less than - 5ft. /yr. of recession. Conversely, during the same period of time the,extreme easternmost end of the island near the inlet was determined to be increasingly accretional. Both the ongoing (2000 - present) beach monitoring plans for Oak Island and Bald Head Island being, implemented by the Village and the Wilmington District, quantitatively well - describe shoreline` changes along both shorefronts. On Oak Island, all of the shorefront subject to episodic beach disposal from ,the channel is highly improved — relative to its pre - project condition. One exception (where disposal sand placement does not occur because of lack of public access) is at Fort Caswell where a section of oceanfront shoreline has experienced a documented persistent erosional hot, spot since 1996. At that location, published, average annual shoreline erosion "trend rates" between August 2000 and September 2010 have ranged between -4.5 ft/yr. and -8.8 ft/yr. Localized computed annual shoreline change rates at survey profiles 35 and 40 „however, have been as, high as =90 'ft/yr and -200' ft/yr, respectively. On Bald Head Island, shoreline conditions are much more spatially vafiable relative to the 1999 baseline survey condition. As expected however-, the highest rates of documented shoreline change at any one time occur along the western end of South Beach nearest the inlet. Additionally, Bald Head Island has experienced mote frequent sand placement from not only the navigation project pursuant to the WHSMP, but also from 'two (2) borrow sites — located at'the entrance to Bald Head Creek to the north, and Jay Bird Shoals to the south. Ongoing erosion 4 Olsen Associates, Inc 17 July 2014 experienced on West Beach has likewise necessitated sand placements in 2006, 2009, 2012 and 2013. B. Plan Purpose The monitoring plan discussed ,herein is intended to meet the requirements of State and Federal law addressing a.) beach restoration activities on Bald Head Island including borrow site creation, as well as b.) permits for a .terminal groin structure proposed for construction at the western end of South Beach — along with any attendant borrow site excavation (as necessary) and resultant sand fill(s). The plan is likewise intended to be reasonable and cost - effective as provided by the enabling legislation (G:S 113A- 1151(e)(5')). Specific elements of new work associated with the monitoring of the terminal groin will' - be directed toward the identification of — and quantification of — any detrimental project related downdrift changes to West Beach which could potentially warrant mitigation. Interpretation of post - construction surveys will be influenced by historical data detailing ongoing erosional trends at these two 'locations. For example, documented beach ,erosion at West Beach over the last decade (in the absence of the terminal structure) has necessitated several protective sand fills at that location, with the most recent event occurring in early 2013. The latter occurred as part.of a federal maintenance dredging operation with sand disposal totaling 1.8 Mcy placed ,at Bald Head Island. Hence, an important component of the expanded monitoring program will be to not only evaluate structure performance, but also to discern- any differences in downdrift erosion that could be associated with the construction of a terminal groin — and that warrant near term attention by the Village or which can `.be addressed by a reliably scheduled pending federal disposal operation. Additionally, the Village as Applicant for a terminal groin is charged with preparing a plan for the management of the inlet and the estuarine,and ocean shorelines immediately adjacent to and under the influence of the inlet. The Division of Coastal Management (DCM) ,has taken the position that, despite the presence of the approximately two (2) mile distance between islands, the spatial extent of the intervening ebb tidal ,shoal formations represented by Middle Ground and Jay Bird shoal's, the intervening 'impacts of Western Channel and an episodically i dredged - navigation channel, some monitoring is required at the easternmost end of Oak Island. The shoreline immediately adjacent to and under the influence of the inlet is the oceanfront 5 Olsen Associates, Inc. 17 July 2014 shorefront of Fort Caswell. Both the historical database and ongoing comprehensive beach monitoring program being implemented by the Wilmington District at Oak Island more than adequately meet the requirement for monitoring. Redundant surveying by the Applicant would therefore be both unreasonable and not cost - effective. C. Beach Surveys i. Bald head Island For purposes of documenting both future beach disposal and, terminal groin project performance and shoreline change, The Village will continue to perform comprehensive annual beach monitoring as carried out over the past thirteen (13) years at'Bald Head Island The survey baseline for this work is, depicted by Figured. Profiles, are surveyed twice annually (seasonally) on approximately 400 -ft. intervals. Profiles generally extend some 2400 -ft. or more offshore and include the depth of closure for natural beach 'conditions — except where intersected by the federal- navigation channel, or a major shoal feature. All surveys ate performed by a certified hydrographic surveyor registered in the State of North Carolina. Several additional profile lines will be added to the existing survey program in the vicinity of the terminal structure (see 'Figure 2). In addition, the project surveyor will be required to annually perform an approximate MHWL survey between Sta.'0 +00 and-75+00 (see Figure 3). Each survey will be compared to prior surveys and utilized for trend analysis. Digitally controlled aerial photography taken at approximate 6 -month intervals will likewise be used to supplement analysis of the post - terminal groin shoreline condition. The first post - construction 'MHWL- survey will be performed within 30 days of the completion of the proposed terminal groin and updrift beach fill, thereby documenting 'the as- built shoreline condition. The entire island -wide monitoring surveys will be performed on a six - month basis at the same approximate time as previous seasonal survey program addressed by the existing (pre - terminal groin) comprehensive'island -wide beach monitoring program. ii. Oak Island For approximately the past 12 years, the Wilmington District, USACOE has performed comprehensive physical monitoring- which included both the Oak Island and Bald Head Island shorelines. The purpose of'this program has been to examine the response of adjacent beaches, entrance channel shoaling patterns and the ebb tidal delta to the Wilmington Harbor channel 6 Olsen Associates, Inc. 1'7 July 2014 deepening and realignment project. As a result, a comprehensive data base has been developed which portrays shoreline changes at both locations for over a decade. For purposes of assessing post - construction oceanfront shoreline conditions on the eastern end of Oak Tsland, the Village's coastal engineering consultant will utilize publicly available survey data acquired by the Wilmington District, USACOE (see Figure 4). Similarly, the consultant shall access and utilize relevant federal aerial photography of the Oak Island area of interest. Should the USACOE terminate. the annual acquisition of survey data on Oak Island, the Village shall survey annually the east end of the island from !Sta. 60 through Sta. 30, including half stations. The number of beach profiles surveyed shall not "exceed seven (7). That.data shall be added to the database acquired by the Wilmington District beginning in 2000. Note — Sta. 60 is the easternmost limit of beach disposal by the Wilmington District on Oak Island. It is essentially synonymous with the westernmost boundary of FortCaswell. The Village's responsibility for analysis of post -groin physical surveying on Oak Island will terminate if six (6) years of monitoring subsequent to terminal groin structure completion fails to indicate a cause and effect relationship between structure installation, or borrow -site utilization, and oceanfront shoreline change at the eastern end of Oak Island immediately adjacent to and under the influence of the inlet. D. Borrow Site Monitoring Surveys The existing permitted borrow area located on Jay Bird Shoals was surveyed both immediately prior to and after construction of the 09/10 Village sponsored 1.8 Mcy beach restoration project (see Figure 5). Subsequent surveys are being performed at 12 -, 24- and 36- months and biennially thereafter. The area surveyed includes a minimum of 500 -ft. of coverage outside the permit limits of the borrow site. The survey is performed by single beam sonar on a density line spacing of 100 -ft. Due to shallow water, portions of Jay Bird Shoal northward of the borrow area, up to 72 -acres of shallow seabed may need to be surveyed by non -sonar methods. In this area the surveyor may use single beam sonar on a shallow draft boat, or wading profiles at low tide using RTKGPS. A1,00 -ft. grid spacing will continue to be maintained at this location, irrespective of methodology required. Subsequent to a Post -Irene emergency dredging project at South and West Beach constructed in 2011/12, a Bald Head Creek borrow site is subject to 7 Olsen Associates, Inc 17 July 2014 annual ,surveys beginning in January 2013 (see Figure 5). The project fill volume was 120,000 cy. Permitted borrow sites utilized for locally funded sand placement operations at' Bald Head Island' shall be monitored in accordance with the Permit Condition associated with each project. Subsequent to sand placements required by the construction of'the terminal groin based upon the borrowing of sand• from within the remaining (1 Mcy +) unexcavated (permitted) portion of the Jay Bird Shoal borrow site; the northward expansion of the borrow site at the entrance to 'Bald Head Creek; the Smith Island Range of the federal navigation channel, or any other permitted site; annual monitoring of that site shall be performed -- pursuant to the ,term" of the associated Permit(s): Monitoring results shall be addressed in each subsequent Village annual monitoring report. E. Hydrographic,Survey Standards In general, the followiing-will apply to all surveys: 0 Surveys will be performed to meet or exceed the Minimum 'Performance Standards for the USACOE Hydrographic Surveys. Specifications manual EM 11110. -2 -1003, January 2002 (or its successor). 0 All data will be corrected for tide and heave. 0 The survey vessel will be positioned using RTKGPS. Soundings will be in feet and I0t''s. 0 Vertical Datum will be local NGVD29. 0 Horizontal Datum will be NC NAD83 F. Aerial Photography The Village of B'al'd Head Island will continue to perform controlled (color) rectified digital aerial photography° of the island shoreline(s) twice a year — usually coincident with' the timing of each seasonal beach survey. The present minimum areas of'coverage are the West Beach, South 'Beach and East Beach shorelines. Oblique low altitude photography is likewise performed periodically as required to document the occurrences of any storm, or man -made event of interest. Any repair of the sand tube groinfield is likewise documented by ground level digital photography. 8 Olsen Associates, Inc 17 July 2014 G. Reporting A comprehensive report-of- findings will continue to be issued annually which presents, analyses and discusses all data acquired over the prior twelve (12) month period. Of particular interest will be beach and borrow site changes which occur over time and any potential effects downdrift of the proposed terminal structure. Each report will, likewise discuss, consider and compare, the relevant portions of the historical database as it relates to the most current survey(s). All patterns of erosion, accretion or shoaling will be documented, quantified and graphically depicted. For any project borrow site, map differencing will be performed ,annually (and cumulatively over time) for purposes of visually demonstrating spatially occurring changes in elevations due to shoaling. For the Point and West Beach downdrift shorelines, comparative MHWL and aerial mapping will be- presented .subsequent to terminal groin construction along with volumetric analyses currently being computed every 6 months. The Village consultant will maintain and expand the present day comprehensive monitoring report format and deliverables to include specific Sections which specifically address borrow site construction and all subsequent changes over time, as well as terminal groin and sand fillet performance and downdrift (post- structure) shoreline history, on Bald Head Island. A separate Memorandum-of-Findings regarding oceanfront shoreline changes occurring along the eastern end of Oak Island shall be formulated annually. The latter will be based upon publicly accessible federal survey data provided by the Wilmington District, or additional data acquired by the Village, if necessary. H. Deliverables Each Annual Monitoring Report, and Memorandum -of- Findings will be delivered to the Village of Bald Head Island, off - island .Stakeholders and all relevant State or Federal regulatory agencies within 90 -days of completion of the last survey performed for the reporting period of interest. Additionally, digital data acquired or addressed by each Annual Report or Memorandum -of- Findings can be transferred to ,an Agency or Stakeholder, upon request. 9 Olsen Associates, Inc. 17 July 2014 III. MITIGATION THRESHOLDS A. Baselines,for Evaluation Both the West Beach downdrift, shoreline and the cross -inlet 'Oak 'Island oceanfront shoreline immediately adjacent to and under the influence of the inlet have over 12 years' worth of post- deepening (1999= present) survey data sufficient to document present day shorefront conditions. Most data take the form of cross -shore profiling at intervals sufficient to document volumetric change and contour location along the shorefront of interest.- Supplementary aerial photography is likewise available to assist with the interpretation of survey data on Bald Head Island. The post -1999 survey data are considered most relevant due to associated changes in navigation project dimensions, corresponding episodic dredging operations within the entrance channel storm events and, most importantly, the equilibration of multiple beach disposal projects intended to improve,.shoreline conditions on both barrier islands. Interpretation of the latter phenomena will be extremely important since the temporal variation in shoreline change (volume and location) — after a beach fill — is typically, "significant. Segments of both Oak Island and'Bald Head Island have received, and will continue to receive, large scale beach disposal projects (often exceeding 1 Mcy per event) in accordance With�the Wilmington Harbor Sand'Management Plan (WHSMP). B. Impact Determination — West Beach (Bald Head Island) (Sta 0 +00 to Sta 24 +00) Both West Beach and the depositional spit feature known as the Point lie downdrift of the terminal structure proposed for construction at the westernmost limit of South- Beach. As a result, both are subject to change as the downdrift shorefront seeks a post - structure equilibrium condition. Currently, it is expected (and supported by in -depth modeling) that a., portion of the West Beach shorefront will potentially require beach disposal on a 3 -year basis — with or without terminal structure implementation. The principal borrow source for interim small scale sand placement at that location (if necessary) will be the expanded Bald Head Creek borrow site. The assignment of "impact" on West Beach due to a terminal structure will therefore need to weigh the following site specific factors potentially affecting shoreline conditions downdrift of the groin: 10 Olsen Associates, Inc. 17 July 2014 • Interval between sand placement projects? • Have average annual shoreline recession rates (volumes ,and MHWL location) increased by over 50 %? Has beach fill equilibration been accounted for? Is the duneline being impacted? ® Can a documented cause and effect relationship be assigned to downdrift shoreline reconfiguration, or is any newly developed "hot spot" isolated and therefore not the result of a quantifiable trend? ® Do _numerical modeling results support or refute the observed shoreline erosion trends? ® Can extraordinary meteorological conditions be defined as a cause of accelerated erosion? ® Have navigation channel maintenance operations changed in frequency or scope C. Baseline for,Action — West Beach, Bald` head Island The baseline for action along West Beach (Sta 0 +00 — Sta 24 +00 by definition) shall be determined by analysis of historical surveys along this reach acquired on almost a 6 -month basis since 2000. Over this 14 year period, either the Village or the Corps have placed sand when the limit of erosion reached "critical" condition portions — in most cases where the limit of erosion was located at/or within the primary dune. All such landward limits of erosion locations are well documented by survey. Hence, the "baseline" for remedial actions by "the Village along West Beach is the point at which the limit of upland erosion reaches its historical worst case condition — as documented by survey since 2000 — or is projected to teach such a condition in the next 6 months. D. Impact Determination — Oak Island (Fort Caswell) In depth numerical modeling analyses of Oak Island predict no quantifiable impact to littoral transport patterns or rates and associated shoreline change at that location due to either terminal groin construction or the continued use of the Jay Bird Shoal borrow area (to the'limits of excavation permitted in 2008). The latter sand source was only partially dredged by the 11 Olsen Associates, Inc. 17 July 2014 Village in 09/10, however all modeling analyses (including the most recent DELFT 313 model) have assumed the borrow area has been excavated in its entirety. Similarly, the model predicts, no changes in inlet hydrodynamics of significance to any stakeholder, be they federal or non- federal. Historical shoreline documentation included in the first USACOE physical monitoring report required for the deepening of the Wilmington Harbor Navigation Project depicted a strong, trend of accretion for both `the oceanfront and inlet facing shorelines located on the easternmost mile of Oak Island — for the per "iod 1933 - 1,983. Most of that segment is located within the privately held Fort Caswell parcel. Between 1983 and 1996, the same COE•report documents a general trend of recession along the Fort oceanfront (E -W) shorefront and continuing modest accretion along the majority of the inlet facing (N -S) shoreline. Subsequently, the Corps likewise has documented (by survey) Post - Harbor Deepening annualized shoreline change rates of -90 and -200 ft/yr at survey profiles 35 and 40, respectively — for the survey period 2000 — 2010. Those profiles extend,seaward -of the Fort Caswell oceanfront shoreline. The most recent, published USACOE survey monitoring data for Oak Island (through 2010) indicates a near term general trend of beach stability (after two disposal projects) on Oak Island with very modest average annual sediment losses. The littoral transport, processes supporting such a condition are corroborated by the DELFT313 model. One exception to the measured trend is at Corps baseline - monitoring stations 35 and 40 where ,the above discussed localized "hot spot" clearly continues to ,be in existence. Both back -beach and dune erosion at this location have been of recent concern to alocal interests associated with the Fort Caswell property. The latter shoreline is outside, the limits of sand placement from navigation, channel maintenance. It is'likewise, adjacent to a large scale marginal flood channel. Both the -lack of direct beach disposal and the effects of the marginal flood channel can be considered to be two of several contributors to the present day erosional hot spot The comprehensive DELFT3D modeling performed on behalf of the Applicant demonstrates no level of potential impact on any segment of Oak.Island shoreline. Nonetheless, the Village herein proffers a "baseline" for the initiation of "mitigation" pursuant to SB 110, from Sta: 60 to Sta., 3,0,, the oceanfront shoreline immediately adjacent, to and under, the influence of the inlet. The Village shall deliver annually to DCM a report of its monitoring results. In the event the monitoring results. disclose any,potential,shoreline change exceeding a,-baseline trigger, a Technical Advisory Committee (TAC) shall be consulted. The latter shall be comprised of a 12 Olsen Associates, Inc 17 July 2014 NC licensed professional engineer with substantial expertise and employment experience in coastal engineering from the Village, Oak Island Stakeholders and DCM (one from each, for three (3) total engineers) to review the results of the monitoring and analyses and to consider ,whether there is any terminal groin related impact on shoreline change exceeding the baseline trigger. The TAC shall be formally established prior to the completion of construction of the terminal groin project. It shall be the responsibility of the TAC to confirm or refute any potential effects attributable to any element of the terminal groin project, including borrow,site excavation. In no event shall the terminal groin be deemed responsible for any impacts or shoreline change from storms or other natural phenomena; including, without limitation, the influences of the adjacent shipping channel or Western Channel, channel maintenance dredging, federal beach disposal design, or any delay or absence of sand placement from channel maintenance dredging. The Analysis by the TAC regarding potential impacts, to the easternmost segments of Oak Island (i e. Fort Caswell) will at a minimum need to weigh, without limitation, the following site specific factors: ® Are changes in oceanfront shoreline, conditions isolated, or are they the result of a clear reversal or acceleration in trend? ® Has recent beach disposal occurred on Oak Island? Was the federal disposal project continuous and adequately tapered at its eastern end? Did it continue to exclude the Fort Caswell property? Is fill equilibration affecting rates of shoreline translation? Are there dissimilarities in- disposal sediment composition, compared to the native beach at Fort Caswell ?' ® Can regionally experienced- meteorological or other natural conditions be defined as a potential cause of accelerated erosion? ® Has the pre= existing erosional "hot spot" identified on the eastern Oak Island shorefront increased in magnitude (i.e. either volumetrically or spatially)? ® Does numerical modeling of terminal groin project related borrow site construction, activities (for�purposes of obtaining beach fill) refute or support a cause and effect relationship? 13 Olsen Associates, Inc 1.7 July 2014 0 Have navigational channel maintenance operations changed in frequency, location or scope? If the majority of the- TAC finds that a shoreline impact exists, because of the terminal groin, and not `because of other causes, the Village shall work with the TAC and affected interests at Fort Caswell to determine and implement appropriate adaptive response measures, consistent with the reasonableness and cost - benefit precepts of SB 151, or subsequent law. These response measures are below described in Section IV(B). The TAC may 'likewise recommend changes to the design of the federal disposal project on Oak Island which would seek to strategically maximize benefits to all properties at that location. E. Baseline for Action — Oak Island (Fort Caswell) The baseline, for consideration of action 'by a TAC from Sta. 60 to Sta. 30, the shoreline immediately adjacent to and under the influence of the inlet, shall be determined by.analysi§ of surveyed' beach profiles first initiated by the Wilmington District, USACOE in 2000. As discussed elsewhere, in this Plan, that data shall be updated at least once annually by either the Corps or the Village (if required). The expanded' database shall likewise-be analyzed annually by the Village consultant and' a determination as to recent changes in shoreline location reported in a Memorandum -of- `Findings. Similarly, both an, "annual profile by profile shoreline .change" rate and an updated "trend rate "'shall be computed for purpose of comparison with published annual and long term trend rates measured by survey since 2000 between oceanfront survey Stations 60=30. These are inclusive of the area of persistent' observed recession (he. mol @STA 35- and 40). Table 1 provides a summary of historical data for Sta 60 to Sta 30. Should annual computed shoreline recession rates exceed•by 50 %, or more, the maximum measured annual recession rate (since 2000) at one or more of the designated survey locations, the TAC shall be requested to evaluate and determine the source of the. additional erosion. Similarly, if the updated long term trend rate varies by 50 %, or more from its, last published value; the TAC shall be requested, to evaluate and determine the source of the additional erosion or reduction in accretion (since 2000). In either event, a specific determination shall be made, and a report ,submitted to DCM, regarding any expectation that the causation of additional - erosion is related'to the terminal groin project. 14 Olsen Associates, Inc. 17 July 2014 IV. MITIGATION A. West Beach, The highest priority for any required mitigation on West Beach would be alongshore sand placement sufficient to protect endangered residential ,structures ,and the total loss of protective dune formations. It is probable however that the timing of an expeditious (and sizeable) sand placement project may be adversely affected by other factors such as design document formulation, dredge availability, and public project bid,requirements. As a result, the following interim actions may likewise need to be considered: (1), sand bag revetment construction along the section of shorefront where threatened structures exist, (2) temporary borrowing of sand mechanically from the updrift impoundment fillet, of the terminal ,groin — with placement along the chronically eroded shorefront, or (3) both actions. Coincident with any level of remedial action should be consideration of structure modification. In most.instances, such an action would consist of rock removal from the structure ,crest sufficient to increase its, transmissivity to,sand transport. That is to say, its permeability (or "leakiness ") would be increased Such an action .would not be expected to result in immediate benefits, Hence, it should be.considered to be, a secondary response in the hierarchy, of remedial actions, as noted above, and as discussed in Section V. B. Oak Island — Fort�Caswell As ,previously discussed, no probability of shorelme change at Oak Island is predicted by the comprehensive numerical modeling analyses performed on behalf of the Village. Hence, the previously discussed recommendation of the TAC if necessary — authorized to make a shoreline impact determination — in lieu of just the Applicant. Any recorded increase in erosion on the Eastern section of Oak Island that exceeds the baseline and is determined by the TAC to be caused by the Bald Head Island terminal groin project, would most likely need to be mitigated, through direct sand placement. The most cost - effective future source of beach quality sand is the WHSMP, or sand dredged from within the limits of the federal navigation project by the Applicant. Alternately, the Village may consider, in consultation with the TAC, other measures to address the erosion, such as a sand push, sand stockpiling and transport of disposal sand, sandbag ,or other revetment, sand placement redesign of the federal disposal project limits of fill, 15 Olsen Associates, Inc. 17 July`2014 or, in an extreme circumstance and absent more reasonable, cost - effective alternatives, reduction in size or removal of the terminal groin. V. TERMINAL STRUCTURE ALTERATION As discussed previously, the proposed terminal groin is to be constructed as ,a "leaky" structure with,some, level of reduced sediment transport continuing to occur either through,and/or over the structure crest. As a rubble mound structure, sand permeability can be physically increased through the removal of stones. Any reduction in effective structural elevation will increase sediment transport across the groin. Increased transport would ,be conducive to spit or dry beach growth on the downdrift side of the structure which, in effect,, would be expected to increase sediment transport to West Beach. Such "tuning" of a permeable structure is often desirable even if mitigation is not required Normally, tuning would not occur without the benefit of significant post - construction monitoring, since the transmissivity of such a structure varies over time — dependent upon the condition (i e size and elevation) of the-updrift sand fillet, seasonal wave climatology, storm effects and 'other site specific - factors. In an extreme circumstance, and absent more reasonable, cost - effective alternatives, effective "removal" or major dismantling of 'the structure may be required. To that end it should not be automatically assumed that if theThase I terminal groin fails to meet ,its design goals that it should be completely removed from the shorefront. 'It is entirely likely, that the subject rock .structure could - beJowered to the point that it is almost entirely transparent to littoral transport — such that is posed no threat to the downdrift West Beach shoreline or other interests located on Oak Island. At the same time however, a very low level structure would serve to benefit the updrift — South Beach profile— albeit at a.significantly lower level than originally proposed. That is to say, even without the creation of a protective updrift fillet, a low level rock structure could serve to beneficially act, as a- "template" to the overall updrift beach profile — thereby continuing to provide some level of benefit to both the island and the navigation-project. 16 O1sen,Associates, Inc �Sa INK - , 3 x'' [ �JT' _ j- Wl � cf t - n An An't L� x �i Y z � —27 AS Rl MCI apt l �t r Z.. '.£ -4L F tom. l "Ps avvy { n E es j Man Z. Al }tea -.y7 i., - ,$mpg i gany, t } 3 z �I z r a b. is `i 'ram n a' "0 h p t 1 TM . J 3 WAS`- �r e � } rt x v� " t ate+ m" �r� °MIT :. 3 f 8� fi3��•, .' z �I z r a b. is `i 'ram n a' "0 h p t 1 TM . J 3 WAS`- �r s t � MRS _ - t - •� .. 1���'n, • {iii +;� }t xi +l +F' F t^i ` } it 7"f, a - . - � � - _ _ . N}'�'� F F >� t r .ham,. •.. � �7 • - z 7i 4`" a r t� ..e4,i ' {J JU = J�j1�• •� �l; � i:�� Y Y � t i c ,f }-.�'•`¢ °t;t•, r?x.� 'Ff.`e Y -- �' ,tea Ito-• .`•@ x 4 ai a, i .% •f 2: _ �?<3"..� ay �`. S1Y b j— '•`fid., 3.Y-a< yC 'f. Wallkill .1 F 'r'•`�Ii J_. x'r= Ali laid -c-` i� 1..; �, -t r� {s;`", I .r �• = t " t. t. BA is 1 S Ei N} r iJS.', {i .k`{4'+5��� `4 t� � •1 � S i }T 4 _ � � ,* •rc. n� i��ri�ii��. ��� F - +������ ;. � %�t'�k�:izfyi� �x .�� i.,r �`.,y �'."' 4 rFqr�,L ''- { C. zi t � pia. r � ��s � � ��' � ?� � 'y5� 1��. � t ?h •. - - '. y � y �, , �, d e, „g, ,{�S- ,tct �.• tV ..�'y'� j,.r^, ` T�e�,riF "`'�,� 'f S _. j, .- ....._._...w _._, _ L•..�. 3 1 hi by .` rE`�� `� 'i X• F` � I �I ♦ ( �� r x O 4° GA 0 P, ao C 0 C O cC V w v a W m an W J r C i '-'.s r °may tl '� CIA PE 'EA SAL .. i HEA_D, ✓ IS AN D 'iY3'�R` S3AL sMr r , �. most no RV Koo nosy 4 r . i A Tye L r r A fffff M sr t 'sue r _ e a F r . G, 5,000 ; 1a 000 FT fill ivy Y'i 7 WEST BEACH , > -'May '20141 STA 000+00 —A z lo § 5 - September ibid '0 j(p qstercrded) > 11, 4 1 1 1 11-1111 Lu 1, L, J" ,21 1,- 1. 1", � " 1- ,1 11 0 0 C 0 C 0- 0 CD 0 0 0 C�l ko, r11- 00 M N, M, IRT IS Ln A lD N N N N STA 004 +00' Z 10: ay 201 M22=00:0= -A'A. L -0-4 0 L Ivp dinbA 2&2 > (mosterdddd) L.0 -1777 -111", 1 11 1 1, T"JOIT — " Vil, INI I A 'I I 1 11 1 -1.wtj 114 U 11 1 C C- 0 rN, cn, -ICT Ln) UD I,- 00. - --00 r-4 r, (14 N C4 N N IN M T > 4TA,00�00, Q -May2014 5 & -z- lop Z U- Ikkay 20k 0 -Z- Z > a) J t I - G '5 A 1 AM- IT IA I - X Nt 111"A I t h, 0 0 0 0 CD 01 0 0 0 0 CZ>. 0 0 Itt t.0 aii �4 rn Kt, ko im-4 tq T-1 7-1 -,,�-Oi 4 fON 1Cq r4 N L"�, , N 15 " z io UL a) 5 0 U CU U4 -5 0 0 CIq 0, 0 0 0 0 r- 0 00 ' 0) 0 0 0 0 0 0 r-q r-1 i-4 ri T-1 rq Offshore Distance from Baseline (Feet) Figure 6: Location of maximum erosion at West Beach (2000-present). WEST B_ EACH 15 > May 201411 STA 0.16+00: ..4 5 i November,2600 C 0- -�7 0 (most,eroded)_ (U LU > 5 1 -11 I'll" g T-] . I P j 4, O 0 0 0 0 0 -0 0 0 O 0 LO � 00 0) 0 r_1 C4 cy) 14 U) LD r\ 00 4L-1 ri `Maq,,2014 STA 020+00"i > CO u- 5 N-Vid-ffiber 0 (most eroded) 0 M (U a, 0 _0 C � `r ,° il- 00 O 0 I* Xr) (n 20 STA 02409, z 1-5 cu eti May 29,14 It aj h U_ 10 T ,Nov,erriber 20 M 5 j- Jj (most proded) > 0 LU J- 1, 1 L I I C) 0 CD C) C) 0 0 O 0 0 0 LO 00 a) C) 15 > P STA 02, z 10 Q) (U 5 0 0 Av_ _-Z =­­ � M I " I embde2o > "Ji I A J (most eroded] -5 7_11-11 T 11 1-1: 11 11-1 T A 11 F111: 0 0 0 0 10 rn 1�t Ln tD, N% 00 Ol O ri C*4 M Ln r_1 r_1 i-4 N N N Offshore Distance from Baseline ne (Feet) Figure l: Location of maximum, erosion al West Beach (2900-present). 0 TABLE 1 CASWELL BEACH MONIT01UNG, DATA' (STA 30 — 60),, Source — Wilmington Ijistri'd US_ACO_ EJ_,(2_0_0_0_-2_01,0,'last published monitoring -data — Report No, ;8) (2)" Computed from, COE-, sutvey ddtai0 ffib.- or 12 mo.- Survey intervals) I I Shoreline Trend Maximum Annual Date of _,$4ry-ey.Station_ i "Lon g-Te'vm,Rate-(I) Recession ,Rate (2), (jecurrence ­-00 Wyrf; -2002-- STA 55 4-9311/yf. 94 f Uyr, 1003 _ST,,A_5 0 ___4._8 I005 STA, 45 If t z80ff/yry 2'009 -Sr 4. 5 2006— STA'3" -�88 ftY.Y' ft/yr. 2006 0= ff/yK, 1004 Source — Wilmington Ijistri'd US_ACO_ EJ_,(2_0_0_0_-2_01,0,'last published monitoring -data — Report No, ;8) (2)" Computed from, COE-, sutvey ddtai0 ffib.- or 12 mo.- Survey intervals) I I r' � fax }E-' pt$:z 3 Pe�'f ��� y�° r• � { x,. �. � a 4 ;.,�. } .�9 ,f r;.. s �" �'."�+, r' i SUBMITTED TO: N.C. DIVISION OF COASTAL MANAGEMENT WILMINGTON 'DISTRICT 127 CARDINAL DR. EXT. WILMINGTON, N.C. 28405 -3545 APPLICANT: VILLAGE OF BALD HEAD ISLAND, LN.C. SUBMITTED BY: 'OLSEKASSOCIATES, INC. `a JACKSONVILLE, FL 0-1458 APPLICANT. VICLAGE,&F BALD HEAD ISLAND ENGINEER: OLSEN ASSOCIATES, INC AGENT ERIK! OLSEN, P E. WJ. DATUM- MLLW NOT FOR,PURPOSES OF CONS',R(JCPON olgen assoeialt.s. inc 2618 Herschel Si,eet Jacksonvi,le FL, 32204 (904) 387:6114 C-1468 BRUNSWICK COUNTY, N C VILLAGE OF BALD HEAD ISLAND TERMINAL GROIN PROJECT PROJECT LOCATION Me is I NTS_ N( ZAPt LOOKOUT, FEAR A TLA AITIC OCFA N - SITE DATE - At�PRgVkU CUM I I 1 1 09/30/2013 PRAMIN 0Y, SHEET --I - of 21 ' � r-- DATE APP OVED REV15i0t4 associates, inc VILLAGE OF BALD HEAD ISLAND f)RAWN,BY 2618 Herschel Sireet TERMINAL GROIN PROJECT ML Jacksonville, FL 32204 (904) 367-6114 SHEET Wit CONDITIONS 2, of 21 olsen associates, inc. 2616 Herschel Street Jacksonville. FL. 32204 (904) 387-6114 C 1468 // A Ili, k, 9 1 s. mm ,r -09/30/2013 VILLAGE OF BALD HEAD ISLAND c s DRAWN BY: TERMINAL GROIN PROJECT A MIL SHEET GROIN LOCATION AND CONFIGURATION of 21 It 2 TO 3,FT ARMOR, STONE, FT� CREST ELEV TYP (6 4,i6 15 TONS)± I +7 0 FT NGVD29 3 __3 2 EXISTING GRADE VARIES, +5 TO +8 FT NGVD29- MHW (+2.51 FT NGVD29) MLW (-1.81 FT NGVD29 EXCAVATE TO EL ' POSITS GEOGRID' FOR�ROCK FOUNDATION AS REQUIRED BACKFILL AFTER]INS I,W GEOTEXTIL E (OR MARINE MATTRESS) t NTS TIE BACK SECTION (A-A) VARIESWTH DEPTH OYP)— 3 TO 5.FT ARMOR STONE, 6 TO CREST ELEV. TYP.(I.4 TO 7 TONS)± �10 FT-1 VARIES*. F_ '2 —2 MHW (t2.51 FT NGVD29) TOE OF SLOPj MLW+ 29) 1.81 FT NGVD % ,r,fNG SEABED ELIEV:�J-� -FILLED EXIS"'ROCK VARIES, -2 TO -10 FT NGVD29 MARINE MATTRESS STEKELEV, vARI E S NTS STEM SECTION (B -B} FROM +4 5FT'f0 + OFT 4 TO 6 FT ARMOR STONE, FT CREST ELEV, TYP.(1.4 TO 7 TONS)± F MAX +4.5 FT NGVD29 LARGE VOID BY DESIGN 2 2 MHW (+2.51 FT,Nq��D29) — VARIE 33, WITH DEPTH(TYP) MLW,(-1,81 FT.NqVD29 -1 FT T,?p EXISTING SEABED,ELEV. , . -' ,'.MARINE MATTRESS VARIES. -8 TO -10 T NGVD29�'.­� IF NTS HEAD SECTION (C -C} C�ENTERUINE (TYP) DATUM NGVD29 N ST•bLEVATION'VARIES ---- -- STRUCTURE PROFILE, NOT FOR PURPOSES OF CONSTRUCTION - SUBJECT TO DESIGN REVISIONS BASED UPON S _ , 00.21 olsen aAl 09/30/2013 J6 J6 11 52`4 di�6ciates, inc VILLAGE OFBALD HEAD ISLAND DRAWN BY 2618 Herschel Street TERMINAL GROIN PROJECT ML Jacksonville,,Fl. 32204 -6114 3 SHEET C- 0146887 8 TYPICAL,CROSViSf C-TIANSf E &A 5 of 21 c1l C14 0 0 O .j z 0 cl w < to Q a ui >- 2 �z Z0 0 I<: z z 0 � 0 z ca OZ O Ct 0 - 0'0- �- LL :) L) 0'(9 W. z z 0 Ei p Z� z LU CL 0 0 000 U4 8 •q - U, i N 4p0: IZ ti ti cn cn '.4 ui Z iY Ez C> Z'Z g 0 z rn < O pN NOTTOR PURPOSES'OF CONSTRUCTION ((IAE)N'IA) NOIIVA313 ol'sen ' associates, Inc. VILLAGE OF BALD HEAD (BLAND 2618 Herschel,Street TERMINAL GROIN PROJECT Jacksohvilld. FC 32204 (904) 387-6114 G-1468 GROIN PROFILE z z :3 W. Lu I— z w (01W w l co, F e w CLIZ z — ir a w LL C, < Z 0 cc ir 0 L.) Z z 6 Lul z (K 0 00 0 0 0 lz Q Z�§ 0,;J 3:,Lj - 0,U' L'o Z<U)ww '(wo §l-, l< � OZ §- 0 m '0' �jt* �. .,.- wl (Lwm-,m ml*-zl 0:ap- 1:308,0001 D CL Z' '0 IL 0 w "- z Z! LLI CL uj: V3 a. �.' w 0, ;:1 N i:z a to w 8 z - - — DATE IAPPkO --iEVI! 0-101-20141 EJO I I '2 z 09/30/2013 ZAWN BY ML SHEET 6 of '21 oisen associates, inc 2618 Herschel Street JacksonviLe, FL. 32204 (904) 387 -6114 C -1468 N� 7 OZ t CA d 1 VILLAGE OF BALD HEAD ISLAND TERMINAL GROIN PROJECT PHASE 11 GROIN FILLET (MAXIMUM SEAWARD EXTENT) ,a 1) LIMIT OF GROIN FILLET IS MAXIMUM. ACTUAL LIMITS WILL VARY. 2) EASTWARD LIMIT OF FILLET IS DEPENDENT UPON BERM WIDTH 3) FILLET SAND BERM ELEV AT +8' NGVD (TYP) 4) FILLET VOLUME EST'D AT .5MCY. 5) PHASE it LENGTH - 1900 FT. MOL 0 0 ip 0, OSES OF 09/30/2013 RAWN BY: ML SHEET 7 of 21 olsen associates, inc 2616 Herschel Street Jacksonville, FL. 32204 (904) 367 -6114 C -1468 I , /1' If rt� • 4'1 VILLAGE OF BALD HEAD ISLAND TERMINAL GROIN PROJECT PHASED GROIN PLAN NOTES: 1) PHASE I LENGTH - 1300 FT, MOL. 2) PHASE II LENGTH (TOTAL) - 1900 FT 3) PHASE I DESIGN ELEVATIONS REMAIN UNCHANGED. GSES OF CONSTRiECTI�M. 09/30/2013 a } DRAWN BY: ML ;r SHEET F 8 of 21 NOTES: 1) PHASE 1 LENGTH - 1300 FT, MOL. EM 2) FILLET VOLUME EST'D AT .25Mcy IPA �1 E to s O Z L O A OO�O�I of sen VILLAGE OF BALD HEAD ISLAND associates, inc. TERMINAL GROIN PROJECT 2618 Herschel Street Jacksonville, FL. 322N PHASE I GROIN FILLET 0-146 8 a� 6114 C -146 (INITIAL SEAWARD EXTENT) Of 09/30/2013 ML SHEET ...__. 9 of 21 SECTION Pi-Pi PHASE I GROIN 20 10 0) 0 C 0 4� 3V -10 Lu -20 0 0 0 0 0 C) C:) c> C), C) 0 0 0 0 0 0 0 0 C 0 0 CD 0 0 0 0 0 0 C) 0 0 0 0 , 0 Q r-I r14, m q* in w r- w �0) 0 r-4 M m Itt Ln �01 r7I r4 14 14 r4 rl 1- -1 SECTION P2-P2 20 O 10 Q > -10 -20 Offshore Distance from Baseline (Feet) PHASE // GROIN 0 0 a O CD 0 0 0 0 0 C), 0 MAY 2013'(POST DISPOSAL) rq rq rn It LO -10 r, 00 M C> rf IN 7 �1 STA 48+50 52+64 from Baseline (Feet) MAY - 201 (POST DISPOSAL) 4 k I Of NOTES: 1 SEPT '09 SURVEY FOR REFERENCE ONLY 2, 3 204 Z MAY 13 SURVEY- POST DISPOSAL C. MW M11W Xm MOW -j- 'EST`0 - T- i MW T'f SEPTOG SEABED TOE JES -Dj i i I rl,il i I i i i i,1 I I I I I I I ri7jFTTTT-,nT j1- I I,j 1 TTIT, TPT,m TnT, 0 0 0 0 0 C) C:) c> C), C) 0 0 0 0 0 0 0 0 C 0 0 CD 0 0 0 0 0 0 C) 0 0 0 0 , 0 Q r-I r14, m q* in w r- w �0) 0 r-4 M m Itt Ln �01 r7I r4 14 14 r4 rl 1- -1 SECTION P2-P2 20 O 10 Q > -10 -20 Offshore Distance from Baseline (Feet) PHASE // GROIN 0 a C) 0 a 0 O C) 0 0 0 C) 0 0 0 0 0 a O CD 0 0 0 0 0 C), 0 7-7- 71 rq rq rn It LO -10 r, 00 M C> rf IN 7 �1 STA 52+64 from Baseline (Feet) MAY - 201 (POST DISPOSAL) 4 k I Of NOTES: 1 SEPT '09 SURVEY FOR REFERENCE ONLY 2, 3 204 Z MAY 13 SURVEY- POST DISPOSAL C. 2t) MOW i MW T'f TOE JES -Dj SEPT 09- 'SEABED f tty lmkTr tu I'l T'll I TUT 0 a C) 0 a 0 O C) 0 0 0 C) 0 0 0 0 0 a O CD 0 0 0 0 0 C), 0 C> 0 '0 0 0 0 0 0 m 14* Ln LID rq rq rn It LO -10 r, 00 M C> rf IN Offshore Distance from Baseline (Feet) 4 k I Of NOTES: 1 SEPT '09 SURVEY FOR REFERENCE ONLY 2, 3 204 Z MAY 13 SURVEY- POST DISPOSAL DAIS APNOWD -REVIS'ON Wolsen VILLAGE OF BALD - HEAD ISLAND 09/60/2013 assocFates. me TERMINAL GROIN' DRAWN"lY '2618 hierscnel,5ire6t ML Jacksonville, FL,32204 (9041387-6114 SHEET C-1468 SAND FILLET SECTIONS 10 of 21 LIMIT OF PROJECT EASEMENT -� DISTANCE VARIES----- •- ''m EXISTING DUNE tO (VARIES) unuT OF WOfW -- +fl.S' w � X SLOPE V141 EXISTING BEACH. PROFILE'(TYP) NOTE: 1) FILL DENSITYITO VARY,SPATIALLY DEPENDING•ON CONDITION OF BEACH AT, TIME OF CONSTRUCTION. 2) GROIN FILLET FILL DENSITY VARIES AND MAY EXCEED 300 CY /FT LOCAL TIDAL DATUMSmfET) MHHW +2.8 MHW +2:5 NGVD +1 1 NGV-D(29) 0.0 MLW -1.8 MLLW -2.0 BEACH FILL, +8.0' NGVD TYPICAL SECTION DUNE — +8' NGVD CONDITIONS . -- AVERAGE FILL DENSITY VARY' 41PPROX:,30 SOcy /ft BEACH FILL - -- _• -12' (TYP I -20' SOUTH BEACH ATLANTIC OCEAN AVERAGE'BEACH FILL DENSITY APPROX. 100cy /ft MHW ( +2.5' NGVD) C ��{ p —MLW ( -1.8' NGVD) CAPE FEAR RIVER, CHANNEL GORGE .ASSUMED FILL TEMPLATESLOPE DURING CONSTRUCTION \ ,-- 12TO ;15FT NGVD (TYP,) SLOPE INTERCEPT OF FILLTOE NTS DATUM: NGVD 29 WEST BEA(H NOTE: ti—cxu 1110411 1) POINT FILL DENSITY MAY BE TYPICAL ` ~ a OF EITHER,5.8EACHOR W. BEACH TYPICAL SECTION &.0 I f NITS DATUM. NGVD 29 NOT FOR PURPOSES OF'CONSTRUCTION 1�I��� __..__._ ,_.- .— _._..._,.,.___. -..._— _..._......__... °XDATE- ..._APe'ROYE0 REV`.SION — :.� _. 09/30/2013 associates, Inc VILLAGE OF BALD HEAD ISLAND FRAwVRBY v °` 2618 Herschel'Street TERMINAL GROIN PROJECT M Jacksonville, FL 32204 - C- 14),3a7-6i to TYPICAL BEACH FILL SECTIONS SHEET • _ •� C- 1468 11 of 21 �amll DA - 09/30/201;3 VILLAGE OF BALD HEAD ISLAND "( V E I 6R7v>N- TERMINAL GROIN PROJECT DCM ' y, , MI GTO t O ML PROJECT BASELINE SHELI AND LINTS OF FILL JUN r SCALE :! 0 '2,008 2,bW FT NOTES: r, 21P119JECT BASELINE UTILIZED,FOR ry `4w ' aEACH -MONITORING AND`1=E!JbAL NM ���' ri' 'BE_ ACH'D106t 41 P bgd C_ ON;STRUCTION' ✓E -BY WILII�INGTON,DISTRIC'f, USACOE 3 2) ACTUAL,UMITS_0FTILL'PIACEMENT BY `H VILLAGE',OOk-MITIGATION 13k,EILLET IAiNif6A4 a SkALL BE I4 AC_C-,w"- bANCE •WITHl,RFQUf1{EMEN fS OF 5 >B.1iC}. 3)STA- 4.4 +00,IS YP,ICAL.WESTtRN -LIMIT OF FEDERAL S.,BEACH,DISPOSAL BALD HEAWSLAND LIMITS,OF'FUTURE ` 616d'BAStUNIE PR01�CT RELAi'El) ( { f, ILL AG iIVITES BY -f= VILLAGE'(5EE.N0TE°2) Sj �amll DA - 09/30/201;3 VILLAGE OF BALD HEAD ISLAND "( V E I 6R7v>N- TERMINAL GROIN PROJECT DCM ' y, , MI GTO t O ML PROJECT BASELINE SHELI AND LINTS OF FILL JUN r U� W t— r •, �; 00 a W 1 Z W rn 0 01_ w U) CD C14 O 0 h o t—�QN ; , •. �� w C Z o i ? N • • Lu Z' iR�r.r 3 .♦ C 0 tl3 ly • 1>C2-- (L 0 Lu i/ty NO[ FOR PURPOSES OF CONSTRUCTION oD Rf assSeCi 09/30/2013 c VILLAGE OF BALD HEAD ISLAND 3 TNTAwN pY: 2618 Herschel Street TERMINAL GROIN PROJECT Jacksonville. FL. 32204. `.•.••'t.� s <` m - ML (904) 387.6114 ��� o SHEET C -1468 JAY BIRD SHOALS BORROW AREA 13 of 21 \jj -M � �� 45.000-1--- 40.000 39,'600 Cultural Resources. Exclusion Zone 0' Lq1%%--Zv ;'/ *11-: rrow Site omits A,B,,C,b,E-,F,A 2009/10 (Typ) 38,500— 41,4,500 44,00 43,500— 43,000•- 42,500- JAY BIRD SHOALS 42,600-1 SURVEY - MAY 2013 PROJECT BORROW SITE 38,000-- 41,500 z 41,000— 40.000 39,'600 Cultural Resources. Exclusion Zone 0' Lq1%%--Zv ;'/ *11-: rrow Site omits A,B,,C,b,E-,F,A 2009/10 (Typ) 38,500— DATUM - NGVD29 JAY BIRD SHOALS SURVEY - MAY 2013 PROJECT BORROW SITE 38,000-- R C -4 m m m 0) NY) C"! C"! C4 CIA C14 C14 C4 C4 C14 N CNI rq CN N C4 Easting (ft-NAD83),, E N VBHI RESTORATION PROJECT, A 2,294,630 44,280 2009 BORROW SITE PERMITS: 0 2,296,340 42,940 CAMA-67-09 C 2,294,790 41,100 COE-2007-02699 O'l ID 2,293,400 42,260 E 2,293,100 41,930 F 2,292,930 42:080, K)T FOR PURPOSES OF CONSTRUCTION DAI( APP VrD. RrVISK)N - p olsen 09/30/2013 associates, Inc VILLAGE OF BALD HEAD ISLAND ' DRAWN BY 24618 Herschel Street TERMINAL GROIN PROJECT E J ML Jacks6nville. FL32204 "CJ (904) 387-6114 V"', C -1468 PROJECT BORROW SITE I,/ Ir 15 of 21 ,I O ou m_ Z f7 Q 9r, W u 0 0 -19 C4 N fit x 0 fill (6ZQAdN'V -11-a13 f7 Y 01 FOR PURPOSES OF CONSI !�T. lolsen 18eCAVN U) UOIIV-13 assoclotes,� me j ,2618 Herschel,Street jcc- s nvflle, FL 32204 (904) 387-6114 C -1468 wormuon d aeffow — — — — — — — — — — — Fi iv O ou m_ Z f7 Q 9r, W u 0 0 -19 C4 N fit x 0 fill (6ZQAdN'V -11-a13 f7 Y 01 FOR PURPOSES OF CONSI !�T. lolsen .k assoclotes,� me j ,2618 Herschel,Street jcc- s nvflle, FL 32204 (904) 387-6114 C -1468 VILLAGE OF BALD HEAD ISLAND TERMINAL GROIN PROJECT BORROW SITE TYPICAL SECTION JAY V_ )W SITE k� z 31 uj z 0 u: <u ul, 0 d cil 0 fT z m r La LL, O>. V) Lu 3: in oz W_ LD aC 0 uj SAN 09/30/2013 DRAWN BY. ML SHqEl �6f,o v al i '_ ^ '4 j VILLAGE OF BALD HEAD ISLAND TERMINAL GROIN PROJECT BORROW SITE TYPICAL SECTION JAY V_ )W SITE k� z 31 uj z 0 u: <u ul, 0 d cil 0 fT z m r La LL, O>. V) Lu 3: in oz W_ LD aC 0 uj SAN 09/30/2013 DRAWN BY. ML SHqEl �6f,o v al i '_ ^ '4 19,000 18,000 - 17,000 10 15,000 14,000 cn 13,000 G f 0 Z 12,000 11,000-_ 10,000- am 8 OAK ISLAND FT. CASWELL., Qf I (i )" tL BALDHEAD ISLAND CURRE AUTHORIZED AND M=AINT NEDa ' NAVIGATION CHANNEt� 70 AREAS SUBJECT TO FUTURE'BORROWING OF SHOAL MATERIAL 'Depths,are m, �MSL r 696,000 697;000 698,000 699,000 700,000' 701,000 702,000 Eadfing (m, NAD83) Ar"of dsen- associate-s. inc, VILLAGE OF BALD HEAD ISLAND ,2618 Herschel Street, TERMINAL GROIN PROJECT Jacksonville, FL. 32204 (904) 387-6114 C -1468' NAVIGATION PROJECT BORROWAREAS CH 100 .T- 3,000 704,000 705,000 fJ ItURI'M OF CONSTRUCTION 09/30/2013 DRAWN BY' ML _ -_ —SHEET Y,11, NC i 9 Site Limits 61, 2 2 ASEFA, -3t,( 4, or ;i13 ii�.li.l!!)ht �1:/11,- oIsen. r ossobc}tes alf VILLAGE OF BAI D HFAD !SI =AN[? 26 15 Sl 'ERMINAL GROIN rROJECT tAL ,v e�L 32A4 �4C4)�3[4,1-6114 BALD HEAD CREEK '".. " � �' l S H i= pp _ C -468 BORROW AREA • _ . •', e {I L3 x r {YNi.a t � 1 -L z") i 4 til 6 F Lit :-t EIEVATION (FT-MLWJ s 2700 S S- _ iiL h4 2600 5 E I y 2500 2400 1400 u ,} 2300 { 2200 i a 1200 o 2100 n 6o 1000 0 0 900 Q e - 4 2000 �a. a w < a ,900 m � Q � j Lu p 1800 N w z j a,` > °. 1700 5005 w^u r til 6 F Lit :-t s S S- IrQO O 5 E I y w � 1400 { Q O 1300 v r 1200 n 6o 1000 900 - e - j 700 UJ� X" 600 5005 400` 300 ''. 200 SCALE loo k b 0 250 500 FT f o ` "�► SURVEY- NGVD29 ( OAOWU)- �NOUVA3l3 PHOTO - MAY, 2013 OT FOR_ PURPOSES 'OF CONTRUCTION oisen DATE osol -sold APPROVM E30 REVISION" I - - WPM, associates. inc VILLAGE OF'BALD HEAD ISLAND DRAWN 8Y' 2618iHerschel5treet TERMINAL GROIN PROJECT I ML Jacksonville„ Ft 32204 BALD HEAD CREEK BORROW SITE SHEET (9odJ 387 -611 C -1468 TYPICAL SECTION I t,w �L1 L ; .;l 9 of 21 til 6 F Lit :-t NOT FOR PURPOSES OF CONSTRUCTION associates, Inc. 2618 Herschel Street Jacksonville.fl. 3220 ,404"' 7-6114 C I 46: UI 0 Ch 1511 R 0 < 0 D 0 z 0 U W, (L W W m Lu z > 0 0 ix 5 P i — ') 0 uj ta�z Lu W 0 C, 09/30/20T3 ui Zo A� tA wy, u- 0 W uj V) s c�t0 Ulfca LL ML 4 -- SHEET TEMPORARY TRESTLE 29 of -2,11 m Lu z > 0 0 ix 5 P i — ') 0 uj ta�z Lu W 0 'z 09/30/20T3 ui Zo A� tA wy, u- 0 W uj V) s c�t0 TERMINAL GROIN PROJECT C ", jvj Vv i �G TON tN G L), i i — ') 09/30/20T3 VILLA,GE,OF BALD HEAD ISLAND TERMINAL GROIN PROJECT ML 4 -- SHEET TEMPORARY TRESTLE 29 of -2,11 C ", jvj Vv i �G TON tN G L), i i — ') THE F" ArIQ t) FILL PAD SAND TO BE SOURCED FROM • DISPOSAL BERM (ABOVE MHWL). 2) FILL PAD TO ALLOW CONTRACTOR `i 7 EQUIPMENT ACCESS FOR ROCK } 1 PLACEMENT SEAWARD OF THE MLWL (OPTIONAL) Olsen associates, inc. VILLAGE OF BALD HEAD ISLAND 2618 Herschel5treet TERMINAL GROIN PROJECT Jacksonville, FL. 32204 1 4) 387 -6114 C -1 C-1«68 j PHASE 1 GROIN Fill PAD (OPTION) II a 4 • i1 OF 09/30/2013 ML SHEET 21 of 21