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HomeMy WebLinkAboutSouth Ferry Channel Written Notice 2/11/2021COASTAL PROTECTION ENGINEERING OF NORTH CAROLINA, INC 4038 MASONBORo Loop ROAD WILMINGTON, NC 28409 910-399-1905 February 11, 2021 Heather Coats Beach & Inlet Management Project Coordinator North Carolina Division of Coastal Management 127 Cardinal Drive Wilmington, NC28405 Subject: Hatteras Inlet Channel Maintenance Project —Written Notice of Project Initiation Dear Ms. Coats: The Division of Coastal Management (DCM) issued a CAMA Major Permit for the proposed Hatteras Inlet Channel Maintenance Project on December 22, 2016 (#129-16). This permit was subsequently renewed on January 22, 2020 and has a current expiration date of December 31, 2024. This letter serves as written notice of project initiation as required in Condition 7 of the permit. Please find attached to this letter revised permit drawings dated February 11, 2021, which provide the location of the proposed channel for the upcoming event. The project includes maintenance dredging within a portion of the Hatteras Inlet Connector Channel, which runs between the inlet gorge and the ferry channel in proximity to Ocracoke Island. This channel is locally referred to as the "South Ferry Channel". The attached plan view drawing shows the location of the proposed channel, the disposal area, and previously mapped submerged aquatic vegetation (SAV) resources in the vicinity. The channel is proposed to be dredged by a combination of the US Army Corps of Engineers (USACE) side cast Dredge Merritt and special purpose Dredge Murden. Material dredged from the channel will be sidecasted to either side of the proposed channel and or placed in the nearshore disposal location offshore of Ocracoke Island. The environmental window for dredging opened October 1. The USACE and Dare County have agreed on a tentative schedule to begin dredging around February 17, 2021. The actual dredging of the channel is anticipated to last approximately three (3) to four (4) weeks. We do not anticipate any issues with dredging outside of the environmental windows established by the permit for the upcoming proposed maintenance event. At the time of this letter, it is anticipated that the project will be conducted between February 17, 2021 and March 17, 2021. As you are aware, the Major CAMA Permit (#129-16), originally issued in December 2016, was modified in March 2018 to allow for maintenance of a 200 ft. wide channel to a depth of -12 ft. MLW. Based on budget, dredge availability, and conditional surveys conducted February 4, 2021, the proposed channel dimensions for this upcoming dredging event are to establish a 200-foot wide channel at elevation -8 ft MLW along the NE -SW oriented segment of the channel, and 150-foot wide channel at elevation -8 ft. COASTAL PROTECTION ENGINEERING OF NORTH CAROLINA, INC. c GA51AE --== -- Page 12 PROTECTION ENGINEERING MLW along the E-W oriented segment of the channel. Based on the conditional survey from February 4, 2021, establishment the proposed channel will require the dredging of approximately 50,000 cy of material. The proposed channel is shown on the attached drawings, including both plan view and cross - sectional view. Please note that we do not expect the USACE to fully remove the entirety of this volume, but rather this is seen as an upper limit on what could be removed if the channel were to be completely dredged to the dimensions shown on the plans. As required by the permit, we have contacted Don Field with NOAA to determine if any updated imagery is available for the project area to delineate SAV habitat. As of the date of this letter, we have not received a response from Mr. Field; however, once we receive a response, we will provide that to your agency via email. Our last information from November 2020 was that the Albemarle Pamlico National Estuary Partnership (APNEP) collected new imagery in May/June 2020 and NOAA was awaiting deliverables to be provided by the contractor. We made the formal request that the imagery and delineation be provided to us when available. Regarding contact information during dredge activities, Brennan Dooley of the USACE will be the point of contact for the USACE dredging operations. Brennan's Phone Number is (910) 251-4916 and his email is brennan.j.dooley@usace.army.mil. I will be the County's agent and can be contacted via cell phone at (910) 443-4471. Please feel free to contact me anytime for further clarification or explanation of the project. Sincerely, Ken Willson Senior Program Manager Coastal Protection Engineering of North Carolina, Inc. Office: 910-399-1905 Mobile: 910-443-4471 kwillson@coastalprotectioneng.com CC: Brent Johnson, Dare County Jonathan Howell, NC DCM Gregg Bodnar, NC DCM Garcy Ward, NC DWR Robert Pullinger, NC DWR CHARLOTTE • N.T.S. NOT FOR CONSTRUCTION FOR REGULATORY REVIEW ONLY HATTERAS INLET MAINTENANCE PROJECT DARE COUNTY, NORTH CAROLINA 0 7500 15000 GRAPHIC SCALE IN FT RALEIGH EIGH P CAPE HATTERAS �p9�(Y\OVI PROJECT LOCATION —JACKSONVILLE• MOREHEAD CITY CAPE LOOKOUT CAPE FEAR Z a W W SHEET INDEX Z 1 COVER SHEET 2 PROJECT OVERVIEW IY 3 CONNECTOR CHANNEL PLAN VIEW C 4 CONNECTOR CHANNEL CROSS SECTIONS _ u W � � O C 8- °A GENERAL NOTES: o L 6-woo 1. COORDINATES ARE IN FEET BASED ON NORTH CAROLINA STATE PLANE COORDINATE SYSTEM, NORTH AMERICAN a c o o B DATUM 1983, (NAD83) 1 a z u 2. ELEVATIONS ARE REFERENCED TO MLLW. PERMITTED DREDGE DEPTH IS RELATIVE TO THE MLW DATUM BEING p M E APPROXIMATELY 0.08' ABOVE MLLW PER NOAA PID EX0400. C: O a 3. DATE OF AERIAL PHOTOGRAPHY: CS-1, PV-1 AND PV-2 FEB. 2017 GOOGLE EARTH. 4. SURVEY DATA COLLECTED BY US ARMY CORPS OF ENGINEERS. FEBRUARY 04, 2021. 5. BATHYMETRIC CONTOURS REPRESENT THE CONDITIONS OF THE CHANNEL ON FEBRUARY 04, 2021 AND SHOULD NOT BE RELIED ON FOR NAVIGATION PURPOSES. LEGEND N ° MEAN LOW WATER LINE w o MEAN HIGH WATER LINE ------- CROSS SECTION LINE m 0 HAT-03-V-18 HATTERAS INLET BORINGS 2003 AND ID m i i i ll NEARSHORE DISPOSAL AREA z =o 1l SUBMERGED AQUATIC VEGETATION AND 100 FT. BUFFER " " "`° \ N ASBUILT EXISTING CABLE ROUTE (CALDWELL CABLE VENTURES) L &o ; o EXISTING CABLE ROUTE (UTLITY ELECTRICAL CONSULTANTS, PC) ASBUILT NEW CABLE ROUTE b w a ATLANTIC w a •Z�• OCEAN +0.52' MHW u 6 +0.41' NAVD88 N Z L uj �- _ _ e�z ce MLW a 'o __+0.08' ______ +0.00' MLLW ___ F� y W Z U a � o TIDAL DATUM mkce REFERENCE TIDAL DATUM REFERENCE BASED ON NOAA TIDE DRAWING NO. STATION ID 8654467 EPOCH 1983-2001" CS-1 SHEET 1 OF 4 I\1 r _ PAMLICO SOUND �l \ I 1 \ CONNECTOR CHANNEL CORRIDOR \ HAT-03-V-17 �J O HAT 0 V-18 �— HAT-03-V-19 �\ / i ,; OCRACOKE 'i ISLAND / r� LIFE SAVING STATION AVOIDANCE AREA 74 I II \ \ J \ J CHARTED WRECK AVOIDANCE AREA ai c / J / l IHAT-03-V-6 j 0 I / HAT-03-V-7 ti07-03-V-90 Q HAT-03-V-8 HAT-03-V-10 Q HAT-03-V-11 0 mw \\ Q OHAT-03-V-12 HAT-03-V-14 HAT-03-V-13 \ J / BREAKING SHOAL AVOIDANCE AREA 1 NEARSHORE DISPOSAL J � LocAnory NOT FOR CONSTRUCTION FOR REGULATORY REVIEW ONLY HATTERAS INLET PROPOSED CONNECTOR CHANNEL PV-1 5 0 -5 -10 -15 -20 MHW EL.+0.52' MLW EL. +0.08' CROSS SECTION A -A' FEBRUARY 04, 2021 EXISTING GRADE TARGET AD EL. = -8.0' MLLW ------------------------------ MAXIMUM AD EL. =-11.92' MLLW -5+00 0+00 5+00 10+00 15+00 20+00 25+00 30+00 35+00 DISTANCE ALONG SECTION (FEET) CROSS SECTION B-B' 5 MH_W EL. +0.52' _ 0 MLW EL. +0.08''- W LLLL-5 ----------------------------------- - J J -10-_._._._._._._._._----------- ._._.. z 1L O g j -15---------- i.-------------- .. LU J CHANNEL y W WIDTH 200' -20-------------------------.. -25 5 _ p FEBRUARY 04, 2021 qEXISTING GRADE ------------------------------- 5 - ------------------------------- -10 L TARGET AD EL. = -8.0' MLLW 3 ----1-15 - MAXIMUM AD EL. =-11.92' MLLW 5 0 -5 -10 -15 -20 40+00 45+00 CROSS SECTION C-C' C A -A' C' 5 MHW EL_+0_52' 0 _ MLW EL. +0.08-' LU W W LL 5 J -10 ------------------- +----------------------- .2. z O H j-15 ------------------- ----------------------- J CHANNELS W WIDTH 150' -20 DISTANCE ALONG SECTION (FEET) 1. ELEVATIONS ARE REFERENCED TO MLLW. PERMITTED DREDGE DEPTH IS RELATIVE TO THE MLW DATUM BEING APPROXIMATELY 0.08' ABOVE MLLW PER NOAA PID EX0400 NOT FOR CONSTRUCTION 2. MAXIMUM AD EL. OF -11.92 MLLW SHOWN ON CROSS SECTIONS FOR REGULATORY REVIEW ONLY IS EQUAL TO -12.00 MLW PER NOAA PID EX0400. 5 -. - --. FEBRUARY 04, 2021 EXISTING GRADE --- ------------------- _10 ;MET AD G " 15 W o MAXIMUM AD EL. =-11.92' MLLW/- z W d J W W � " =s <° z zE� a x 25 a�'o 500 1000 " 0 " DISTANCE ALONG SECTION (FEET) G LL W O 2 i U 0 22000 Soo �on/nvncxc xo. HORIZONTAL GRAPHIC SCALE IN FT XS- VERTICAL GRAPHIC SCALE IN FT SXEET 4 OF 4