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HomeMy WebLinkAboutDCM Written Notice 11/2/2020COASTAL PROTECTION ENGINEERING OF NORTH CAROLINA, INC 4038 MASONBORo Loop ROAD WILMINGTON, NC 28409 910-399-1905 November 2, 2020 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 November 02, 2020, 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 the US Army Corps of Engineers (USACE) side cast dredge Merritt. Material dredged from the channel will be sidecasted to either side of the proposed channel. The environmental window for dredging opened October 1. The USACE and Dare County have agreed on a tentative schedule to begin dredging around November 6, 2020. The actual dredging of the channel is anticipated to last approximately 16 days. 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 November 6, 2020 and December 1, 2020. 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 budget, dredge availability, and conditional surveys conducted October 15, 2020, the proposed channel dimensions for this upcoming dredging event are to establish a 150-foot wide channel at elevation -9 ft. MLW. Based on the conditional survey from October 15, 2020, establishment the proposed channel will CC OASiAL PROTECTION ENGINEERING COASTAL PROTECTION ENGINEERING OF NORTH CAROLINA Page 12 require the dredging of approximately 20,000 cy of material. The proposed channel is shown on the attached drawings, including both plan view and cross -sectional view. 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. Mr. Field responded that the Albemarle Pamlico National Estuary Partnership (APNEP) collected new imagery in May/June 2020; however, the contractor has not yet provided updated interpretations. We have requested the imagery and will provide any relevant updates. Regarding contact information during dredge activities, Bob Keistler of the USACE will be the point of contact for the USACE dredging operations. Bob's Phone Number is (910) 612-7611 and his email is robert.w.keistler@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@coastalprotectionengcom 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 0 7500 15000 GRAPHIC SCALE IN FT RALEIGH* &P -JACKSONVILLE • tc s CAPE FEAR HATTERAS INLET MAINTENANCE PROJECT DARE COUNTY, NORTH CAROLINA CAPE HATTERAS PROJECT LOCATION REHEAD CITY LOOKOUT Z a W W SHEET INDEX z 1 COVER SHEET 3 Z 2 PROJECT OVERVIEW IY k 3 CONNECTOR CHANNEL PLAN VIEW C 4 CONNECTOR CHANNEL CROSS SECTIONS F u W � � O C 00 o GENERAL NOTES: � ` o aoZ. 1. COORDINATES ARE IN FEET BASED ON NORTH CAROLINA STATE PLANE COORDINATE SYSTEM, NORTH AMERICAN a s o 0 0 DATUM 1983, (NAD83) w o a z u 2. ELEVATIONS ARE REFERENCED TO MLLW. PERMITTED DREDGE DEPTH IS RELATIVE TO THE MLW DATUM BEING p Z Z APPROXIMATELY 0.08' ABOVE MLLW PER NOAA PID EX0400. C: O 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. OCTOBER 15, 2020. 5. BATHYMETRIC CONTOURS REPRESENT THE CONDITIONS OF THE CHANNEL ON OCTOBER 15, 2020 AND SHOULD NOT BE RELIED ON FOR NAVIGATION PURPOSES. LEGEND —�—»— —»—��— MEAN LOW WATER LINE MEAN HIGH WATER LINE ------- CROSS SECTION LINE 0 HAT-03-V-18 HATTERAS INLET BORINGS 2003 AND ID nt A. NEARSHORE DISPOSAL AREA vQ �� a� o 6 C w Uw l \ SUBMERGED AQUATIC VEGETATION AND 100 FT. BUFFER \ a N � ASBUILT EXISTING CABLE ROUTE (CALDWELL CABLE VENTURES) oa a" EXISTING CABLE ROUTE (UTLITY ELECTRICAL CONSULTANTS, PC) ASBUILT NEW CABLE ROUTE t ATLANTIC W W Z Way OCEAN +0.52' MHW N u +0.41' NAVD88 N Q W Lu L Lu mZo m WI Z � +0.08' MLW "� W ------------------ +0.00' MLLW --- a 'z o m o TIDAL DATUM Zko REFERENCE TIDAL DATUM REFERENCE BASED ON NOAA TIDE DRAWING NO. STATION ID 8654467 EPOCH 1983-2001" CS-1 NAME DATE SHEET 1 OF 4 S S S i� ��\ ` S L) ti s �l S i�T� y�1 S � � ) � �' � � \\� t�L � � �/ CONNECTOR 1—� L_\ �\i �/^ � /I 1 ) \ ) \ CHANNEL CORRIDOR �� ) /� � /� / 547000 L\ �\` /1 _\ �—��__�1 �\�� f� /HAT-03-V-6 i � • � \/ 1 i _—_ _ PAMLICO SOUND �� � i �� ti.gT-03-V-9O O HAT-03-V-8 `V �� •� `\`_ CHARTED WRECK ' • � _ AVOIOAN CE AREA HAT-03-V 1U \ • __ - -- Q HATrERAS ,�\, `•�• _� OZ-TAT=C531T-i6 ---��� O HAT-03-V-11 �' 4a��� sa2000 �� •• Q OHAT-03-V-12 t \ �` �`` HAT-03-V-17 � � HAT-03-V-13 � 0 HAT- HAT-03-V-14 � �1a�= / `� _ �� �i� \� -V-1B `��7 H V '� �" HATrERAS �_ HAT-03-V-19 � INLET i / `� `� �\ �l �i'OCRACO KE � �� __-- �. ..�. -i ISLAND---------� �' LIFE SAVING STATION PROPOSED CONNECTOR ���� i� AVOIDANCE AREA CHANNEL — / BREAKING SHOAL • _ AVOIDANCE AREA NOT FOR CONSTRUCTION FOR REGULATORY REVIEW ONLY p 1000 2000 GRAPHIC® �_ I PV-1 g r�e¢r z oc � CROSS SECTION A -A' 00 0+b0 5+b0 10�00 15�00 20�00 25-�00 304 DISTANCE ALONG SECTION (FEET) CROSS SECTION B-B' 5 W LLLL -5 2 -10 z O Q -15 W J W IIIIIIIIIIKIII -25 NOT FOR CONSTRUCTION FOR REGULATORY REVIEW ONLY FLW EL. +0.08' CHANNEL WIDTH 150' 5 5 0 0 ........ F .-.- OCTOBER 15, 2020 ............. EXISTING GRADE -5 W L; -5 EL. -9.0' MLLW ---E- ....................... ---------------- - -- -10 10 13 Jl z TARGET AD EL. = -9.0' MLLW H 15 W -15 MAXIMUM AD EL. =-11.92' MLLW W ........ 1.-.-_ .-.-.-.-.-.-.-.-.-.-.-.. _qn -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 2. MAXIMUM AD EL. OF -11.92 MLLW SHOWN ON CROSS SECTIONS IS EQUAL TO -12.00 MLW PER NOAA PID EX0400. CROSS SECTION C-C' C A -A' C' EL_+0_52' _ EL. +0.08' OCTOBER 15, 2020 EXISTING GRADE EL. -9.0' MLLW AD EL. = -9.0' MLLW MAXIMUM AD EL. =-11.92' CHANNEL WIDTH 1W DISTANCE ALONG SECTION (FEET) o5 10 VERTICAL GRAPHIC SCALE IN FT 1 -10 -25 W G " �w o uu K 2 2 OR W L�� u m o J W G Z Z W £ Q W � W > a z 2 Z x 0 200 Soo I HORIZONTAL GRAPHIC SCALE IN I I XS-1 SHEET 4 OF 4 1