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HomeMy WebLinkAbout19870006 Ver 1_COMPLETE FILE_19880215IN REPLY REFER TO Regulatory Branch DEPARTMENT OF THE ARMY WILMINGTON DISTRICT, CORPS OF ENGINEERS P.O. BOX 1890 WILMINGTON, NORTH CAROLINA 28402-1890 February 10, 1988 3 n ?(3 I: SUBJECT: Files Nos. SAWC087-N-065-0366 and SAWC088-N-065-0157 Ms. Estelle C. Lee, President Almont Shipping Company Post Office Box 1726 Wilmington, North Carolina 28402 Dear Ms. Lee: Reference your application for Department of the Army authorization to install and operate a scour jet dredging system on the Northeast Cape Fear River at ship dock facilities, Wilmington Harbor, New Hanover County, North Carolina. Your proposal has been reviewed and found consistent with the provisions and objectives of general permit No. SAWC080-N-000- 0291. Therefore, you may commence construction activity in strict accordance with applicable State authorization and the enclosed plan. Failure to comply with the State authorization or conditions of the general permit could result in a violation of Federal law. If any change in your work is required because of unforeseen or altered conditions or for any other reason, plans revised to show the change must be sent promptly to this office and the North Carolina Division of Coastal Management prior to performing any such change or alteration. Such action is necessary as revised plans must be reviewed and the authorization modified. Questions or comments may be addressed to Mr. Hugh Heine, telephone (919) 343-4725. Sincerely, Charles W. Hollis Chief, Regulatory Branch Enclosure -2- Copies Furnished with enclosure: Director, Atlantic Marine Center National Ocean Service ATTN: MOA 232X1 439 West York Street Norfolk, Virginia 23510-1114 Ms. Beverly Etheridge, Chief Wetlands Section Region IV Marine and Estuarine Branch U.S. Environmental Protection Agency 345 Courtland Street Atlanta, Georgia 30365 Ms. L. K. (Mike) Gantt U.S. Fish and Wildlife Service Post Office Box 25039 Raleigh, North Carolina 27611-5039 Mr. Randy Cheek National Marine Fisheries Service Habitat Conservation Division Pivers Island Beaufort, North Carolina 28516 Ms. Ann Miller State Property Section North Carolina Department of Administration 116 West Jones Street Raleigh, North Carolina 27603 Mr. John Parker Division of Coastal Management North Carolina Department of Natural Resources and Community Development Post Office Box 27687 Raleigh, North Carolina 27611-7687 Mr. C. Robert Stroud, Jr. Wilmington Regional Office North Carolina Division of Coastal Management 7225 Wrightsville Avenue Wilmington, North Carolina 28403 Mr. William Mills Water Quality Section Division of Environmental Management North Carolina Department of Natural Resources and Community Development Post Office Box 27687 Raleigh, North Carolina 27611-7687 t O) w I J'S - * ou J I •..001 ' L?19 [ x Iy? z W 3 1 J J Z J J ° U v h x V o Z > ° ? o - ?V j r °p U 44 e/.. T. 2 ; . . lY O o a : 0 J t J f Z t •d ? Z 00 O o v O W .. O / KV = t i ., W ?111111I? ?? - LOC?,T?ION PI?A.N R : `,.. r, LPL N A m 10 111 b ® S. i .I N = r s t. RED CRO55 ` X Z-HOn N U J -a\ J J U Q .. x a oZ>o z - :':= - W Z jf 1 1 v-_/ Q 4a ? BU RGAW O 4 17 ? PRo?EO ?;? a • ,4 70 ? V ' WILMINGTON WRIG HT SVILL E 1 BEACH ! CAROLINA 1 BEACH zI CAPE FEAR R ?01BALDHEAD ?C ISLAND P VICI- ITY MAP Ill = 21-? MI• ?EA?? NA?2?VVcbP` ?I I iJG, LMGN -rl ?;i S(E??E? PP??, NC. c.L. R .RI \v1LMING7cq-j, N C y ,I'( 2 19R7 " FFIC( OF C.O?S1f?? PtIANRGEihEi?l F 1,., I r,TON REGIONAL OFFICE IW PROPOSED SCOUR JET ALMONT SHIPPING CO. WILMINGTON,N.C. APRIL, 1987 HENRY VCH OESEN A ASSOCIATES CONSLAJINCi ENGINEERS 6 PL ANNEgS WILMINGTON, HOMTH CA, CXOHA 21402 .,. I it I I N t°J ' ? ? asa"'?? I too - ?0 i F?a J 7N ? t' o r 11.1 7 a t J _ } Y Z d O 3 7 X ? 0 ON n Q ^ Vh u a ? .a, o 0 P d ? 4 m ?, n ?l{ I Q ?I Q11 iW "° I, 11/ I 5 • ?I J z /Lu V ?r 1 V Q LL) cc D O U v / I Zz II .M ,Cn.IF/ 'JILL t)t ANAGjCr rl ??I'4'.1 I?IGTON I.E1,1NAL OrF?ICr PROPOSED SCOUR JET - ALMONTSHIPPING CO. WILMINGTON N.C - ?? , . APRIL, 1987 S HENRY VON OESEN 9 ASSOCIATES ` ? ?"dU TI I NKi ENC-4NEERS 8 PLANNERS WIL141NOTON , NORTH CAIIOLINA 23402 I?. 1nR kin %?I--In A l1J N r` _I 8 +d ll -7 t? v o o- p? 8- x 1 10 C) 10 0. N. I° 0 LF •r? J Mc) .. 1, L1F(iCE ?)? fC''•?.U;I_ tY1?+f?if,GEh1Eh-I ?'dGL?lif G' ; (' G:CItiAL OFFICE r l Z ? _- i - 1. x -? Z ,OL-S j I J T _I 0 Ll/ i Q I (? -II o I ? I PROPOSED SCOUR JET ALMONTSHIPPING CO. WILMINGTON,N.C. APRIL, 1987 (M? HENRY V0fq OESEN 8 ASSOCIATES (? J?Jjat I CxTiNG ENGINEERS 9 ptANNERS v1 MIL-INOTON. NOOTH C?rtO lx? 2V+02 EXIgT C RAtlc . 0.7 pF COAS'TAI. MANAGEMENT 1'?ili IiVG?Ot? RE,3101:A1 OFFICE ELCc.T?I CAL.. COi,.I C?cJ I? - ??_?-? k-+A NG ? 2 F C.,o Nca r-?U C;?tJ til tr DTI o c ?l 8 E? F I.G?T1 IG OF&FA"fr-Z7 cs4-r,\/,& L\,/E, l a II P Vc, Mall N 8 ° Pic -? - I.)p?oF? P?2?c?ET 411 No?.zL? C ? PI?? -? 5? ?Tlo ?.1 8" F l::-1c4 4" ?JoZZL, PA c k::, tJ T. \I- 811 PVc Slc- at-,j A1? NOZZLE. :SGT kIOZZt__C-: PROPOSED SCOUR JET ALMONT SHIPPING CO. WILMINGTON,N.C. APRIL, 1987 HENRY VON CESEN 6 ASSOCIATES CONSL&TING ENGINEERS S PLANNERS WfLmiNGTON, NORTH CARDONA .1610j JOB N0. 313q SHT 4 OF q G Permit Class 4th Renewal STATE OF NORTH CAROLINA Maintenance 1 Department of Natural z nd,CJommunity Development ti1 r c{{G-?? fob' Mai II?e 1 nt'in onmental Cone XQ Excavatio36Rf1lt8pli?sfft to NCGS 113-229 Permit Number 80-74 Issued to Amerada Hess Corp., 1 Hess Plaza, Woodbridge, N. J. 07095 authorizing development in New Hanover Countyat Cape Fear River (east side, near U.S. Hwy. 76-74 bridge) as requested in the permittee's application dated 2/19/74 including attached plat dated revised 3/20/74. This permit, issued od? ( l / `? ? , is subject to compliance with the application (where consistent with the permit), all applicable regulations, special conditions and notes set forth below. Any violation of these terms may subject permittee to a fine, imprisonment or civil action; or may cause the permit to be null and void. (1) No dredging may take place between February 1 and May 31 of any year in order to protect anadromous fish and shrimp populations without prior approval of the Division of Coastal Management in consultation with the Division of Marine Fisheries. (2) All excavated materials will be confined above mean high water and landward of regularly or irregularly flooded marsh behind adequate dikes or other retaining structures to prevent spillover of solids into any marsh or surroun- ding waters. (3) The disposal area effluent will be contained by pipe, trough or similar device to a point at or below the mean low water level to prevent gully erosion and unnecessary siltation. (4) The terminal end of the pipeline will be positioned at or greater than (See attached sheet for Additional Conditions This permit action may be appealed by the permittee or other qualified persons within twenty (20) days of the issuing date. An appeal requires resolution prior to work initiation or continuance, as the case may be. This permit must be accessible on-site to Department personnel when the project is inspected for compliance. Any maintenance work or project modification not covered hereunder requires further Departmental approval. All work must cease when the permit expires on March 31, 1989 In issuing this permit, the State of North Carolina agrees that your project is consistent with the North Carolina Coastal Management Program. Signed by the authority of the Secretary of DNRCD and the Chairman of the Coastal Resources Commission. David W. Owens, Director Division of Coastal Management This permit and its conditions are hereby accepted. Signature of Permittee V Amerada Hess Corporation Permit #80-74 Page 2 ADDITIONAL CONDITIONS fifty (50) feet from any part of the dike and a maximum distance from spill ways to allow settlement of suspended solids. (5) A water control structure will be installed at the intake end of the effluent pipe to assure compliance with water quality standards. (6) The diked disposal area will be constructed a sufficient distance from the mean high water level or any marsh to eliminate -the possibility of dike erosion into or upon any marsh and/or surrounding waters. NOTE: Maintenance excavation after March 31, 1989 may take place only after the submittal and processing of a current application form.. and appropriately updated work plats. Permit Class New STATE OF NORTH CAROLINA (by CRC Variance) Department of Natural peso }' s 4nd,Community Development Coastal -Kesaurcest ssion foi 1 Ma16rJ?evflQptti nt:in, L ronmental Conc t a Excavation and16r,d p rsuant.to NCGS 113-229 Permit Number 20-88 Issued to Almont Shipping Company, P. 0. Box 1726, Wilmington, NC 28402 authorizing development in Wilmington New Hanover County at Northeast Cape Fear River in as requested in the permittee's application dated 5/20/87 i nc1 udi ng attached plats, sheets 1--4 of 4 dated 4/87. This permit, issued on l 2,718 K , is subject to compliance with the application (where consistent with the permit), all applicable regulations, special conditions and notes set forth below. Any violation of these terms may subject permittee to a fine, imprisonment or civil action; or may cause the permit to be null and void. (1) Operation of the scour jet system must be limited to periods of ebb tide. (2) A monitoring system shall be established which will provide data on suspended solid values for areas upstream and downstream of the basin. The sampling shall also provide data on in-situ benthic population before and after the system is operated. The permittee must present a- sampling program which will be reviewed and approved by the Department prior to installation of the scour jet system; (3) Operation of the scour jet system shall be altered to implement seasonal controls if monitoring data indicate significant adverse impacts to aquatic organisms, i.e., anadromous fish and. shrimp, during periods of peak biological productivity. (4) The scour jets will be operated in such a manner as to prevent any significant increase in turbidity outside the immediate area of operation. Increases such that the turbidity in the Northeast Cape Fear River is 50 NTUs or less will not be considered significant. (5) This permit does not authorize interference with any existing or proposed Federal project. This permit action may be appealed by the permittee or other qualified persons within twenty (20) days of the issuing date. An appeal requires resolution prior to work initiation or continuance, as the case may be. This permit must be accessible on-site to Department personnel when the project is inspected for compliance. Any maintenance work or project modification not covered hereunder requires further Departmental approval. All work must cease when the permit expires on December 31, 1991 In issuing this permit, the State of North Carolina agrees that your project is consistent with the North Carolina Coastal Management Program. Signed by the authority of the Secretary of DNRCD and the Chairman of the Coastal Resources Commission. David W. ens, Director Division of Coastal Management This permit and its conditions are hereby accepted. Signature of Permittee IN REPLY REFER TO Regulatory Branch. DEPARTMENT OF THE ARMY .IILMINGTON DISTRICT. CORPS OF ENGINEERS P.O- BOX im WILMINGTON. NORTH CAROLINA ZB402-184 October 23, 1987 0' 2 6 987 Wu! :. UA IfY SECTION OPERATIONS BRANICI! SUBJECT: File No. SAWC087-N-065-0366 Ms. Estell C. Lee, President Almont Shipping Company Post Office Box 1726 Wilmington, North Carolina 28402 Dear Ms. Lee: By copy of North Carolina Department of Natural Resources and Community Development letter to you of October 15, 1987, we 'Lave been informed that your application for State authorization to install and operate a scour jet dredging system on the Northeast Cape Fear River at ship dock facilities, Wilmington Harbor, New Hanover County, North Carolina, has been denied. Under the administrative rules of our regulatory program, denial of required State authorization precludes favorable consideration of a Federal permit. Accordingly, your Department of the Army application is hereby denied, and your file has been retired. As mentioned in the State's letter, you may request a var_ance by appealing to the Coastal Resources Commission that your proposed work is consistent with the objectives of the Coasts' Zone Management Act. Should you be successful with such an appeal, your application for Federal authorization will be reactivated.and processed as expeditiously as possible. Mfr. Hugh Heine of my staff is available to answer any questions. He may be reached at telephone` (919) 343-4725. BY AUTHORITY OF THE SECRETARY OF THE A. HY:. Paul W. Woodbury Colonel, Corps of Engineers District Engineer -2- W 'r Copies Furnished: Mr. John Parker Division of Coastal Management North Carolina Department of Natural Resources and Community Development Post Office Box 27687 Raleigh, North Carolina 27611-7687 Mr. C. Robert Stroud Wilmington Regional Office North Carolina Division of Coastal Management 7225 Wrightsville Avenue Wilmington, North Carolina 28403 Mr. William Mills Water Quality Section Division of Environmental Management .North Carolina Department of Natural Resources and Community Development Post Office Box 27687 Raleigh, North Carolina 27611 Mr. Paul S. Denison Henry Von Oesen and Associates Post Office Drawer 2087 Wilmington, North Carolina 28402 State of North Carolina Department of Natural Resources and Community Development Division of Coastal Management 512 North Salisbury Street • Raleigh, North Carolina 27611 James G. Martin, Governor October 15, 1987 David W. Owens S. Thomas Rhodes, Secretary Director Certified Mail Return Receipt Requested Ms. Estell C. Lee, President Almont Shipping Company P. 0. Box 1726 Wilmington, NC 28402 Dear Ms. Lee: This letter is in response to your application request for permits under the Coastal Area Management Act (CAMA) and the state dredge and fill law to construct and operate a scour jet basin maintenance system at your company docks on the Cape Fear River in Wilmington. Processing of your application, which was received on May 21 and placed under extended review on August 4, 1987, is now complete. Based on a joint state and Federal agency review, including onsite investigation, this office has made the following findings: 1) The proposed scour jet concept does not include conveyance and containment of spoil material on high ground as is provided for in conventional dredging technique; 2) Inadequate data was submitted to adequately determine the impacts on fisheries resources and water quality as it may relate to such resources; 3) The proposed project is determined to be inconsistent with Coastal Resources Commission Rules NCAC 7H.0208(b)(2)(B) and (c), which require containment if excavated materials. Given the foregoing findings, it is necessary that your request be denied. This denial is pursuant to N.C.G.S. 113A-120(8) which requires denial of permit request upon finding the proposal inconsistent with the State Guidelines of Areas of Environmental Concern. Alternatives that could be considered for this site include a return to conventional hydraulic or clamshell-type excavation. Also, additional information could be submitted to address the questions raised by unconfined spoil disposal. If unique circumstances are present, you may consider requesting a variance. In any case, Division personnel are available to P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone 919-733-2293 An Equal Opportunity Affirmative Action Employer ?" w Mrs. Estell Lee Page 2 October 15, 1987 discuss with you and consider any changes to the application that you may wish to submit. If you wish to appeal this denial, you are entitled to a hearing. The hearing will involve appearing before an Administrative Law Judge who listens to the evidence and arguments of both parties and then makes a recommendation to the Coastal Resources Commission. Your request for a hearing must be in the form of a written petition, complying with the requirements of Chapter 150B of the General Statutes of North Carolina, and must be filed with the Office of Administrative Hearings, P. 0. Drawer 11666, Raleigh, N. C. 27604, within twenty days of receipt of this letter. A copy of the petition should be filed with this office. Also, you should be advised that as long as this State permit denial stands, your project must be deemed inconsistent with the N. C. Coastal Management program, thereby precluding issuance of Federal permits for this project. The Federal Coastal Zone Management Act of 1972 (CZMA) gives the right to appeal this finding to the U. S. Secretary of Commerce, within 30 days of receipt of this letter. Your appeal must be based on the grounds that the proposed activity is (1) consistent with the objectives or purposes of the CZMA, or (2) is necessary in the interest of national security, and thus, may be federally approved. If you have any questions concerning the appeal procedure, please contact Mr. John Parker at 919/733-2293, P. 0. Box 27687, Raleigh, NC 27611. Sincerely, David W. Owens DWO/aw cc: Mr. Peter Tweedt, Director U.S. Department of Commerce, OCRM Washington, D. C. Colonel Paul W. Woodbury Corps of Engineers Wilmington, NC iT DIVISION OF ENVIRONMENTAL MANAGEMENT WATER QUALITY SECTION Comments. concerriYng an application; for State Federal CAMA Permit(s) from II v /r i E e ( ix J I,? c l./ l a-(4 ?'u?%? ILIL..A6.L.J?a? fL A. PERMIT: This office cannot comment on this project until after the close of the Section 401 Certification Public Comments Period. This office has no objection to the issuance of the permit(s) for the proposed project with the following conditions: That the activity be conducted in such a manner as to prevent significant increases in turbidity outside the area of construction or construction- related discharge (increases of 25 NTU's or less are not considered significant). That the instream turbidity not be increased by more than 50 NTU's as a result of the proposed activity after a reasonable opportunity for dilu- tion and mixture. That turbidity levels in shall not be increased by more than 10 NTU's as a result of the proposed activity after a reason- able opportunity for dilution and mixture. B. CERTIFICATION STATUS: _ Certification is not required for this project. Certification is required for this project. Such action to process the certification has been initiated. Proposed Certification will be acted on or after The proposed project is certified under General.Certification A) No. 1179 issued on January 25, 1977, for sewer line construction B) No. 1272 issued on November 10, 1978, for bulkhead construction. C) No. 1273 issued on November 10, 1978, for discharges of liquid effluent from diked upland disposal areas. D) No. 1431 issued on October 16, 1980, for boat ramp construction. E) No. 1664 issued on September 8, 1983, for Rip-Rap Placement. F) No. 1665 issued on September 19, 1983, for incidental bridge construction. 7 WATER Q AL TY SECTION DIVISION OF ENVIRONMENTAL MANAGEMENT DIVISION OF ENVIRONMENTAL MANAGEME?C C E I V E D MEMORANDUM G DATE: August 3, 1987 AUG 06 1987 WATER QUALITY SECTION TO: Bill Mills OPERATIOrW $RANCH Operations Branch FROM: David H. Cotton ' Wilmington Regions Office THROUGH: A. Preston Howard, Jr. Wilmington Regional Office SUBJECT: Regional Office Review & Recommendations Application for Permit for Excavation and/or Fill Almont Shipping Company New Hanover County The applicant is proposing to install scour-jet array to re-suspend sediment bedding on the floor of the Almont mooring berth. The jet array is designed to alleviate the need for maintenance dredging. The project is located adjacent to the Cape Fear River, classified SA. The project has been reviewed to determine impacts to water quality. The project will not require a 401 Water Quality Certification. The project should not raise the turbidity levels of the waters above 25 N.T.U.s. This office has no objection to the project as proposed. DHC:kc cc: DCM - Bob Stroud CF, WiRO OFFICE OF COASTAL MANAGEMENT FIELD INVESTIGATION REPORT 1. Applicant's name Almont Shipping Company 2. Location of project site Northeast Cape Fear River Downtown Wilmington, New Hanover County - New Photo 15-186 - Grid L-M; 11-14 3. Investigation type: Dredge & Fill X CAMA x 4. Investigative procedure: (A) Dates of site visit 6-8-87 (B) Was applicant present yes 5. Processing procedure: Application received 5-21-87 Office WiRO 6. Site description: (A) Local Land Use Plan Wilmington-New Hanover Land Classification from LUP Developed Development constraints identified in LUP none for projects of this nature (B) AEC(s) involved: Ocean Hazard Estuarine Shoreline Coastal Wetlands Public Trust Waters X Estuarine Waters x Other (C) Water dependent: Yes X No Other (D) Intended use: Public Private X Commercial (E) Type of waste water treatment: Existing City of Wilmington Planned N/A (F) Type of structures: Existing Pier Planned Scour jet array (G) Estimated annual rate of erosion N/A Source --- 7. Habitat description: AREA Dredged Filled Other (A) Vegetated wetlands : (B) Non-vegetated wetlands : Bottom Appx. 35,000 sf (C) Other: (D) Total Area Disturbed: Appx. 35,000 sf 8. Project Summary Applicants propose to employ a scour-jet array to re-suspend sediment layers along their existing ships berth. 9. 10. PROJECT DESCRIPTION The project site is located on the east bank of the Northeast Cape Fear River in Wilmington. There is a shipping facility located on the site which receives various products including chrome ore and numerous salt based products used by several local industries. A tendency in this area for rapid bottom shoaling results in the interference of off-loading operations at the facility. The shoaling is most troublesome along the face of the existing dock. The existing ships berth is approximately 600' x 100' x -33 mean low water (mlw). The waters are classified as SC but are also a designated primary nursery area for marine species. Yearly climatic conditions dictate the use of the general area by these species. The applicants have submitted a narrative (see attached) which describes the method they propose to deal with this shoaling. Basically a series of water jets (26) will be installed on 20' centers along the face of the existing dock. Periodic blasts of water from these jets will re-suspend settled material back into the water column. These particles will be, or so it is predicted, swept along with the river currents to another location. The initial frequency of these operations is proposed as weekly. With this frequency it is assumed that the depth of settled material will be approximately 1" - 4" deep. These jets will be set with a 10% overlap and have a predicted operational range of 65' - 751. There is the possibility of between 100 to 400 cubic yards of material being re-suspended with each operation. ANTICIPATED IMPACTS One's first thoughts on the above operation is an anticipated adverse increase in turbidity and siltation problems. However, based on personal conversations with Corps personnel involved with a similar project at MOTSU the above concern may be unfounded. Their information is that when the system was operated there was no detected increase above existing background turbidity in the river. The literature provided on the subject has all been of an engineering slant with no biological interpretation or information. Due to the existing depths at which the jets would operate, there may not be an over abundance of juvenile organisms to be impacted. This of course would also depend on how far up in the water column the re-suspended material would rise. Submitted by. C. Robert Stroud, Jr. Date: 6-10-87 Office: Wilmington ?J . l` APPLICATION FOR PERMIT TO EXCAVATE AND/OR FILL WATER QUALITY CERTIFICATION EASEMENT IN LANDS COVERED BY WATER CAMA PERMIT FOR MAJOR DEVELOPMENT Department of Administration State of North Carolina Department of the Army (GS 146.12) Department of Natural Resources and Community Development Corps of Engineers, Wllmington District (GS 113-229, 143.215.3(a)(1), 143.215.3(c), 113A-118 (33 CFR 209.320-329) Please type or print and fill in all blanks. If information is not applicable, so indicate by placing N/A in blank. 1. Applicant Information A. Name- - Almont Shipping Company (Estell C. Lee, President) Last First Middle B. Address P. 0. Box 1726 Street, P. O. Box or Route Wilmington NC 28402 919/34.1-5700 City or Town State 11. Location of Proposed Project: A. County New Hanover 0. 1. City, town, community or landmark Wilmington 2. Is proposed work within city limits? Yes X No C. Creek, river, sound or bay upon which project is located or nearest named body of pr?t?r?tq?prg(gT,2l 1 ?Ar???.` PAENI. Northeast Cape Fear River ti+11.F:i;riGTGN PEGIC't=`FL V-fICE 111. Description of Project A. 1. Maintenance of existing project X 2. New work X B. Purpose of excavation or fill Access channel 2. Boat basin length width depth length width depth 3. Fill area length width depth 4. Other Ship dock length 500 width 65-75 depth Variable; nominally only 1-4 in. C. 1. Ship dock length 600' Average distance waterward of MHW (shoreline) ±100 2. Type of bulkhead construction (material) Reinforced concrete dock D. Excavated material (total for project) 1. Cubic yards Normally 200-400 2. Type of material Silty sand and/or suspended eoloidaI E. Fill material to be placed below MHW (see also VI. A) particles 1. Cubic yards (see above) 2. Type of :material IV. Land Type, Disposal Area, and Construction Equipment: A. Dues the area to be excavated include any marshland, swamps or other wetland? Yes No X 8. Does the disposal area include any marshland, swamps or other wetland? Ycs No X C. Disposal Area 1. Location None required 2. Do you claim title to disposal area? N/A D. Filimaterial source if fill is to be trucked in N/A E. How will excavated material be entrapped and erosion controlled? Fine materials will be placed back in suspension in the water body and transported downstream with the tide . 1 ype of equipment to be used Water jet G. Will marshland be crossed in transporting equipment to project site? If yes, explain No V. Intended Use of Project Area (Describe) A. 1. Private 2. Commercial X 3. Housing Development or Industrial 4. Other 8. I. Lot size(s) N/A ;51.14 2. Elevation of lot(s) above mean high water N/A '`" 3. Soil type and texture N/A OFFICE OF COASTAL r-PINAGEIVIEN1 4. Type of building facilities or structures Commercial ship dock ' ' t hu'5. Sewage disposal and/or wastewater treatment A. Existing X Planned B. Describe City of Wilmington 6. Land Classification (circle one) EVELOP TRANSITIONAL COMMUNITY RURAL CONSERVA HER (See CAMA Local Land Use Plan Synopsis) VI. Pertaining to Fill and Water Quality: A. Does the proposed project involve the placement of fill materials below mean high water? Yes No X B. 1. Will any runoff or discharge enter adjacent waters as a result of project activity or planned use of the area following project completion? Yes-No 2. Type of discharge Relocation of river bed-load materials alread in the system 3. Location of discharge Adjacent river channel at peak falling tide VII. Present rate of shoreline erosion (if known): N/A Vlll. List permit numbers and issue dates of previous Department of Army Corps of Engineers or State permits for work in project area, if applicable: SAWCO 76-N-065-003-1081; NCDNRCD Permit 131-76 etal IX. Length of time required to complete project- Installation time estimated to be 60-90 days X. In addition to the completed application form, the following items must be provided: A. Attach a copy of the deed (with State application only) or other instrument under which applicant claims title to the affected property. OR if applicant is not claiming to be the owner of said property, then forward a copy of the deed or other instrument under which the owner claims title plus written permission from the owner to carry out the project on his land. B. Attach an accurate work plat drawn to scale on 8312 X 11" white paper (see instruction booklet for details). Note: Original drawings preferred - only high quality copies accepted. C. A copy of the application and plat must be served upon adjacent riparian landowners by registered or certified mail or by publication (G.S. 113-229 (d))Enter date served e20 ?7 B D. List names and complete addresses of the riparian landowners with property adl ' ing applicant's. Such owners have 30 days in which to submit comments to agencies listed below. Seaboard Coastline Railroad, 3610 Bush Street, Raleigh, NC 27600 City of Wilmington, P. 0. Box 1810, Wilmington, NC 28402 Dean Hardwoods, Inc., 1 Cowan Street, Wilmington, NC 28401 X1. Certification requirement: I certify that to the best of my knowledge, the proposed activity complies with the State of North Carolina's approved coastal management program and will be conducted in a manner consistent with such program. X11. Any permit issued pursuant to this application will allow only the development described in this appli- cation and plat. Applicants should therefore describe in the application and plat all anticipated devel- opment activities, including construction, excavation, filling, andlAnd clearing. )ATE )rh4? 6 V -7 60 LL?C"' . ? J-- Applicant's Signature D&F-R2 o_.. CFA' orvrr,?r ___ ?? 70N3YOlI p1 uuw Y . '1y•S nsc :J ezi= T'•002• a~r.NCu WO` `3 Y (?? OQ 1• 410 J N + a _ C A W T C / = F 3 W t _ • S > O , Q\ :E Z' 41 pRo o ?e? a i? F t5 1Te?-,5F? 0 0 t Da n?<= c ~ O J aC ¦ N \ goo„ ? ati^ o LL W J J V7 \ . Y -e C ;tJI Y < lil ?:t\ w ? s _ V I N• ,,J . • • 0 J ' 1 ',F ?\ EMI W fi! YYJ' L . ? \ V N '• i. ?v.. W Cf Y •. '7 r 9d Y? c u1 0 J -_ c W .' O J O ? fIIIIIIIJ •• ? ? ?; R•R. ® C ® RE CROSS ST. O0 C 0 FIF-1- z F4 LCD C4-rION PLA.N jLjLo ADC C D ?rARKET r Q Q OUR 4 Q el (i 1?.2 WILMIN W RIGHTSVILLE' BEACH 1 CAROLINA BEACH ZI J SOUTHP001-_ ?A? CAPE FEAR-?RBALOHEAO P ISLAND P u?c i N l TY Ml?.P 710- Itl = 2? Ml• pEa??I NA?2.?Wa? I rJG? :4LMGN? ?f?vEp 2Eg, ING. Wl L M I NIcYrON1I PI C. WILMI NG701-l, N• C a'• ?• ":af 2? 1987 F ti tMINGTON R[GlOtiAL OFFICE r I? PROPOSED SCOUR JET ALMONTSHIPPING CO. WILMINGTON,N.C. APRIL, 1987 ® HENRY VON OESEN 9 ASSOCIATES CONSULTING ENGINEERS B PLANNERS WILMINGTON. NORTH CAROLINA 24402 JOB NO. 313q SHT. I OF4 r i N J cVi 10? I / IU Q a 0 Q o d 0 ?I .dq m "'I iQ J z N I a ?,rc 0 N^ W I J QV 11 Lli V V -Q c D O v zo <co ri - ' 7 G 07 of f1Q. U C,0A- %L faANAGENIEN1 V it,jP,iH4GTOM FJcC?rjNAL OrfICc PROPOSED SCOUR JET ALMONT SHIPPING CO. WILMINGTON,N.C. APRIL, 1987 ® HENRY VON OESEN 8 ASSOCIATES CONSl/ITING ENGINEERS 8 PLANNERS WILMINGTON. NORTH CAMOLINA 24402 JOB NO.3139 SHT. 2 OF 4 -G NN7 "D 7;B 9():A 1QV . -1 06 7:2 lb :z u? 0 0? o? v 4 mZ? :Q 1 ww a?w it p iU N po I- -1 IN QF? iC't' i)F CUSTAL MANAGEMENT VdlLtilirdG'•vi' ('- !CNAL OFFICE 'l k 1 4W Z ?"A ?O \ a ??sr,???.1.ttre brnms ?. ,OL-S9 4 d ?I 3 (o 7D do N (? , ` 33..{{11 ' 41 ? ? I Z 0 ? \ 1 }_ ?I , PROPOSED SCOUR JET ALMONTSHIPPING CO. WILMINGTON, N. C. APRIL, 1987 ® HENRY VON OESEN 9 ASSOCIATES CONSULTING ENGINEERS S PLANNERS WILMINGTON, NORTH CAROLINA 24402 JOB NO.313q SHT. 3 OF,-!. F X15Z' C KA1?IE PVT . 1 v.._1 ^.7 Cf STAL t-lifiNAGEMENI \:A%?: sTnfi R?'+31U;:Al OFFICE EC-j-7-c,Tpt cAl- co{J ou rr l--F,?tJG ? 2 8 u F_t.Er :T? IG OPERA-r= G4&-re ? f_?/I? o 11 PVc t•.l dl tJ 8 ° p?c U p poai ?RAc1Ct= VE 411 L. 34 . o v1 _ SOtJOI?Iur pIL-a . • .r J -E"FV4 4" f40ZZLE e ee&cL-E-( ? ECTI o t`! \- 8"pVc PLAI,d AT W OOZLE. N::?eT NOZZLE PROPOSED SCOUR JET ALMONTSHIPPING CO. WILMINGTON,N.C. APRIL, 1987 ® HENRY VON OESEN & ASSOCIATES CONSULTING ENGINEERS S PLANNERS WILMINGTON, 04011TN CAVOLINA 20402 JOB NO. 315q SHT. 4 OF 4 ? .. BACKGROUND & PRELIMINARY DESIGN INFORMA,Q?,, f ON A PROPOSED SCOUR JET DREDGING SYST ALMONT SHIP DOCK ??:?.? Northeast Cape Fear River Wilmington, N. C. G ?-) STAL MANAGNEN1 Background V iii tti:!'!ui ?1+ REGIONAL OFFI^E The Almont ship berth and loading facility dock has had a problem of rapid shoaling for a number of years. The shoaling process begins immediately following annual (or semi-annual) dredging cycles with accumulations of between 2 to 4 feet of material deposits, depending upon the frequency of dredging operations. This accumu- lation of material can cause difficulties with ship berthing at lower tide ranges when ships arrive at the dock drawing 33 or more feet of water. Frequent dredging of the shoal materials indicates that for the most part they are relatively light sand and/or suspended silts with a high fluid consistency. Nevertheless, after long-term accumulations these materials begin to consolidate, thus interfering with ship berthing operations as mentioned above. It is felt that the nature of the shoaling process, character of the materials and relatively high ebb tide water velocities all lend themselves to removal of these materials by scour jetting to a degree that will either eliminate or greatly reduce the dredging frequency and material volume, should occasional dredging be required. The hard rock bottom underlying the general shoaling area also compliments this proposed method. The basic design and layout of the proposed scour jet dredging system is based on successful studies and tests by the U. S. Navy at Mare Island Naval Shipyard in California and at Kings Bay, Georgia, and the U. S. Army Corps of Engineers installation of a scour jet test system at Sunny Point Ocean Terminal near Southport, 2 North Carolina. These prior test installations have been highly successful in maintaining constant ship berthing depths without periodic dredging and have produced no reported operating or environ- mental problems. Preliminary Design Discussion The basic principle of the scour jet system is to mount a horizontal water jet nozzle close to the harbor or ship berth bottom to agitate sediment in the water and thus prevent shoaling from occurring. The materials put back in suspension in a moving water body (river) rejoin the normal bed load materials moving along with channel currents. The scour pattern achieved by a jet of this type is tear drop in shape, approximately one-third as wide as it is long. For a berthing facility, an array of nozzles is generally placed along the pier face with a 10 percent overlap of the scour patterns to insure that no intermediate shoaling will occur. For the Almont dock the existing pier piles provide a good point of support for the nozzles and are spaced at 20-foot centers. Preliminary design sketches showing the overall project concept and layout are appended to the permit application. With this information and formulas obtained from previous studies and tests by the Navy and Corps of Engineers, a preliminary system was analyzed which would provide a minimum 66-foot scour from the face of the pier. Each nozzle will be 4-inch diameter and shall be provided with a flow of 2500 GPM. A total of 26 nozzles is used in the proposed system. The piping system which feeds the nozzles in the preliminary design consists of a 10-inch diameter PVC manifold suspended below the pier deck with an 8-inch diameter PVC branch pipe with an electronic controlled valve feeding each nozzle. A single 100 horsepower, 2500 GPM (110 THD) vertical turbine pump mounted on a platform with its suction drawing water directly from the harbor, supplies each nozzle individually. An electronic time controller provides sequencing of the electric operated valves on a prepro- grammed schedule. Previous test results indicate that each nozzle with a single jet operating at a time, cyclinjg from north to south with the south-moving ebb tide, should be operated for about 7 minutes at the peak falling tide as required. Thus, the single jet cyclical operation would be completed in approximately 3 hours during peak ebb flows along the face of the dock. The system would be operated only during the period of peak ebb tide when current velocities are high, thus moving the small amount of material that would be placed in suspension along with the normal bed load in transport in the river system. Exact operating frequency requirements for the system cannot be predetermined; however, it is proposed that the system be operated initially on about a weekly basis. The annual shoaling rate at the dock is well known (based on years of surveys and annual mainte- nance dredging exercises). Based on this, it can be roughly esti- mated that only 1 to 2 inches of materials would accumulate during the one-week period (naturally, this could vary depending on seasonal rainfall and flow conditions, but the accumulations would be minimal). Therefore, it can be reasonably be estimated that only approximately 100 to a maximum of 400 cubic yards of material would be disturbed at any one time. This would represent only a minute fraction of the normal bed load and ambient turbidity of the river system in its normal state. Operating cycles would be adjusted as experience dictates it should. 3 4 Conclusions Extensive prior research and test installations indicate that a water jet scour dredging system as described herein could be used effectively to eliminate or greatly minimize annual mainte- nance dredging requirements of the Almont ship berth on the North- east Cape Fear River. Initial capital costs of ?qiinh a evc+-am would be high, but long-term operating and maintenance costs will be relatively low, soon offsetting the high annual cost of mainte- nance dredging. It is felt that with the very minimum of material that is placed in suspension in the river system at each scour jet cycle environmental effects would be negligible. IN REPLY REFER TO Regulatory Branch DEPARTMENT OF THE ARMY WILMINGTON DISTRICT, CORPS OF ENGINEERS P.O. BOX 1890 WILMINGTON, NORTH CAROLINA 28402-1890 July 9, 1987 SUBJECT: File No. SAWC087-N-065--0366 Mr. John Parker Division of Coastal Management North Carolina Department of Natural Resources and Community Development. Post Office Box 27687 Raleigh, North Carolina 27611-7687 Dear Mr. Parker: REC EI\I El JUL 13 1987 ,WATER QUALITY SECTION OPERA Reference the application of Almont Shipping Company, Incorporated, represented by Ms. Estelle C. Lee, for a Department of the Army permit to install and operate a scour jet dredging system on the Northeast Cape Fear River at ship dock facilities, Wilmington Harbor, New Hanover County, North Carolina. The Federal agencies have completed review of the proposal as presented by the application and your field investigation report. We recommend that the following conditions be included in the State authorization: a. The scour jets will be operated in such a manner as to prevent any significant increase in turbidity outside the immediate area of operation. Increases such that the turbidity in the Northeast Cape Fear River is 50 NTU's or less will not be considered significant. b. This permit does not authorize interference with any existing or proposed Federal project. Questions or comments may be addressed to Mr. Hugh Heine, telephone (919) 343-4725. Sincerely, Charles W. Hollis Chief, Regulatory Branch v -2- Copies Furnished: Mr. William Mills Water Quality Section Division of Environmental Management North Carolina Department of Natural Resources and Community Development Post Office Box 27687 Raleigh, North Carolina 27611-7687 Mr. Charles Jones Morehead City Regional Office North Carolina Division of Coastal Management Post Office Box 769 Morehead City, North Carolina 28557 Ms. L. K. (Mike) Gantt U.S. Fish and Wildlife Service Post Office Box 25039 Raleigh, North Carolina 27611-5039 Mr. Randy Cheek National Marine Fisheries Service Habitat Conservation Division Pivers Island Beaufort, North Carolina 28516 Ms. Beverly Etheridge, Chief Wetlands Section Region IV Marine and Estuarine Branch U.S. Environmental Protection Agency 345 Courtland Street Atlanta, Georgia 30365 Mr. C. Robert Stroud Wilmington Regional Office North Carolina Division of Coastal Management 7225 Wrightsville Avenue Wilmington, North Carolina 28403 y of $v?TF o ? r State of. North Carolina Department of Natural Resources and Community Development ; Division of Coastal Management 512 North Salisbury Street • Raleigh, North Carolina 27611 James G. Martin, Governor David W. Owens ; S. Thomas Rhodes, Secretary Director June 26, 1987 Mr. John Sutherland, Chief Water Planning Section Division of Water Resources Raleigh, North Carolina 27611 Dear Mr. Sutherland: The attached copy of an application submitted by: Almont Shipping Co. Applicant's Name Northeast Cape Fear River New Hanover Location of Project County X for a State permit to perform excavation and/or fill work in coastal North Carolina and for a CAMA major development permit... for a CAMA major development permit (only) ... .. is being circulated to State and Federal agencies having jurisdiction over the subject matter which might be affected by the project. Please indicate on the reverse side of this form your viewpoint on the proposed work and return it to me not later than 7/17/87 Sincerely, .J-oh R. Parker, Jr. , thief Major Permits Processing Section JRP:ap:2480 P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone 919-733-2293 An Equal Opportunity Affirmative Action. Employer I DEPARTMENT OF THE ARMY WILMINGTON DISTRICT, CORPS OF ENGINEERS . P.O. BOX 1890 WILMINGTON, NORTH CAROLINA 28402-1890 May 26, 1987 IN REPLY REFER TO Regulatory Branch K.° 17"t. 9 vs C° SUBJECT: File No. SAWC087-N-065-0366 ,, r Mr. William Mills Water Quality Section Division of Environmental Management North Carolina Department of Natural Resources and Community Development Post Office Box 27687 Raleigh, North Carolina 27611-7687 Dear Mr. Mills: Enclosed is the application of Almont Shipping Company, Incorporated, represented by Ms. Estelle Lee, for a Department of the Army permit and a State Water Quality Certification to install and operate a scour jet dredging system on the Northeast Cape Fear River, Wilmington Harbor, New Hanover County, North Carolina. Your receipt of this letter verifies your acceptance of a valid request for certification in accordance with Section 325.2(b)(ii) of our administrative regulations. We are considering authorization of the proposed activity pursuant to Section 404 of the Clean Water Act, and we have determined that a water quality certification may be required under the provisions of Section 401 of the same law. A Department of the Army permit will not be granted until the certification has been obtained or waived. In accordance with our administrative regulations, 60 days after receipt of a request for certification is considered a reasonable time for State action. Therefore, if your office has not acted on the request by July 26, 1987, the District Engineer will deem that waiver has occurred. Questions or comments may be addressed to Mr. Hugh Heine, telephone (919) 343-4725. Sincerely, hat W. tHois hief, Regulatory Branch Enclosure -2- Copies Furnished (without enclosure): Mr. John Parker Division of Coastal Management North Carolina Department of Natural Resources and Community Development Post Office Box 27687 Raleigh, North Carolina 27611-7687 Mr. C. Robert Stroud Wilmington Regional Office North Carolina Division of Coastal Management 7225 Wrightsville Avenue Wilmington, North Carolina 28403 ,,F,?L:?MONT SHIPPING CO., Inc. May 19, 1987 Regulatory Functions Branch U. S. Army Corps of Engineers P. 0. Box 1890 Wilmington, NC 28402, Gentlemen: L WILMINGIfi0 2;'$"4;02' AREA CUE'1I 9"7'83-•364 F _ CABLE X WLfMMlbiV LH U'S. HIWAY 421 NORTH P6ST OFFICE BOX 1726 Vi AY 198TJ Re: Scour Dredging Permi#:Application Almont Ship Dock Wilmington, NC It is requested that a CAMA permit be issued to Almont Shipping Company to allow installation of a scour jet dredging system at our ship dock on the Northeast Cape Fear River in Wilmington, North Carolina. A complete joint state-federal permit application and supporting sketches are attached. The request for installation of this system is based on several years of r, research and development of such systems by the U. S. Navy and U. S. Army Corps of Engineers, and the successful installation and operation of same by these agencies. A detailed background and preliminary information sheet on the proposed scour jet dredging system is also attached for your information and use. It is felt that the rather complete detail included in the permit application and this supporting document is sufficient to preclude incorporation of this same information into this letter request. However, if there are any questions regarding same, we would be happy to meet with agency representatives to discuss it in more detail. Technical questions regarding this system may be referred directly to our engineers (Mr. Charles E. Davis and/or Col. Paul S. Denison), Henry von Oesen and Associates, 919/763-0141. A simultaneous request is being made to the N. C. Department of Natural Resources & Community Development. We appreciate your cooperation and assistance in this matter and look forward to hearing from you in the near future. Sincerely yours, ALMONT SHIPPING COMPANY Estell C. Lee President ECL/rh Enclosures cc: NCDNRCD/Wilmington Col. Paul S. Denison/Wilmington APPLICATION FOR i PERMIT TO EXCAVATE AND/OR FILL WATER QUALITY CERTIFICATION EASEMENT IN LANDS COVERED BY WATER CAMA PERMIT FOR MAJOR DEVELOPMENT, ` - , rr,. ?''ERt?'AA.?•( 11i??\?dl'11 Department 'ministration State of North Carolina Deptrtmenf'trf (GS 12' Department of Natural Resources and Community Development Corps of Engineers, Wilmington District 1 (GS 113-229.143-215.3(a) (1), 143-215.3(c), 113A•119 (33 CFR 209.320.329) Please type or print and fill in all blanks. If information is not applicable, so indicate by placing N/A in blankif`?? ? ..., , army 1. Applicant Information I A. Name Almont Shipping Company (Estell C. Lee, President) Last First Middle B. Address P. 0. Box 1726 Street, P. O. Box or Route Wilmington NC 28402 919/341-5700 City or Town State Zip Code Phone 11. Location of Proposed Project: A. County New Hanover B. 1. City, town, community or landmark Wilmington 2. Is proposed work within city limits? Yes X No C. Creek, river, sound or bay upon which project is located or nearest named body of water to project y Northeast Cave Fear River --- III. Description of Project A. 1. Maintenance of existing project X 2 B. Purpose of excavation or fill New work X 1. Access channel length width depth 2. Boat basin length width depth 3. Fill area length width depth 4. Other Ship dock length 500 width 65-75 depth Variable: nominally only, 1-4 in C. 1. Ship dock length 600 t Average distance waterward of MHW (shoreline) ±100 r 2. Type of bulkhead construction (material) Reinforced concrete dock D. Excavated material (total for project) 1. Cubic yards Normally 200-400 2. Type of material Silty sand and/or suspended eoloidal E. Fill material to be placed below MHW (see also VI. A) particles 1. Cubic yards (see above) 2. Type of :material IV. Land Type, Disposal Area, and Construction Equipment: A. Dues the area to be excavated include any marshland, swamps or other wetland? Yes No X B. Dues the disposal area include any marshland, swamps or other wetland? Yes No X C. Disposal Area 1. Location None required - 2. Do you cl4im title to disposal area? N/A D. Fill material source if fill is to be trucked in N/A E. How will excavated material be entrapped and erosion controlled? Fine materials will be R,laeed bark in suspension in the water body and transported downstream with the tide { . I ype of equipment to be used Water jet G. Will marshland be crossed in transporting equipment to project site? If yes, explain No _ v.. imenoea Use of eroject Area (Describe) A. 1. Private Y, %4 2. Commercial A -3. Housing Development or Industrial 4. Other B. 1. lot size(s) N/A 2. Elevation of lot(s) above mean high water N/A 3. Soil type and texture N/A 4. Type of building facilities or structures Commercial ship dock 5. Sewage disposal and/or waste water treatment A. Existing X Planned B. Describe City of Wilmington 6. Land Classification (circle one)' EVELOP TRANSITIONAL COMMUNITY' RURAL CONSERVA HER (See CAMA Local Land Use Plan Synopsis) VI. Pertaining to Fill and Water Quality: A. Does the proposed project involve the placement of fill materials below mean high water? Yes No X B. 1. Will any runoff or discharge enter adjacent waters as a result of project activity or planned use of the area following project completion? Yes No 2. Type of discharge Relocation of river bed-load_ materials already in the system 3. Location of discharge Adjacent river channel at peak falling tide VI I. Present rate of shoreline erosion (if known): N/A VIII. List permit numbers and issue dat4 of previous Department of Army Corps ..of Engineers or State permits for , work in project area, if applicable: SAWCO 76-N-065-003-1081; NCDNRCD Permit 131-76 etal IX. Length of time required to complete project' Installation time estimated to be 60-90 days X. In addition to the completed application form, the following items must be provided: A. Attach a copy of the deed (with State application only) or other instrument under which applicant claims title to the affected property. OR if applicant is not claiming to be the owner of said property, then forward a copy of the deed or other instrument under which the owner claims title plus written permission from the owner to carry out the project on his land. B. Attach an accurate work plat drawn to scale on 8% X 11" white paper (see instruction booklet for details). Note: Original drawings preferred- only high quality copies accepted. C. A copy of the application and plat must be served upon adjacent riparian landowners by registered or certified mail or by publication (G.S. 113-229 (d))Enter date served d D. List names and complete addresses of the riparian landowners with property adj ing applicant's. Such owners have 30 days in which to submit comments to agencies listed below. Seaboard Coastline Railroad, 3610 Bush Street, Ralei h, NC 27600 City of Wilmington, P. 0. Box 1810, Wilmington, NC 28402 Dean Hardwoods, Inc., 1 Cowan Street, Wilmington, NC 28401 XI. Certification requirement: I certify that to the best of my knowledge, the proposed activity complies with the State of North Carolina's approved coastal management program and will be conducted in a manner consistent with such program. XII. Any permit issued pursuant to this application will allow only the development described in this appli- cation and plat. Applicants should therefore describe in the application and plat all anticipated devel- opment activities, including construction, excavation, filling, and land clearing. DATE .t &F-92 _-- Applicant's Signature:. AjO._ ' PLEASE BE SURE THAT: - Both copies are completed - All blanks are filled in ?. - You have signed both copies If you have any questions please call your regional field office. Mail copy to: District Engineer Wilmington District Corps of Engineers P. O. Box 1890 Wilmington, N. C. - 28402 (Note: attach Corps transmittal letter) Phone: 919/343-4631 AND i , Mail one copy. to your regional field office as indicated on the map below: i , East of Chowan River and north of Albemarle S -? to Virginia border, including northern Dario Cc -77 r' Gates t .o ,Ce?•??,j and outer banks to Ocracoke Inlet. of Chowan River and south of Pamlico Riveri Hertford Coastal Management Field Services ding southern half of Beaufort County. ,f- -'" ! 90; •? ray 108 S. Water Street Elizabeth City, NC 27909 ;oastal Management Field Services -3 oft.: 919/338-0206 502 N. Market Street ` Bartle a? yashington, NC 27889 119/946-6481 L t . /YWashinaton )Tyrrell 1 . Beaufnrt Pender \ South of Pamlico River and Beaufort County to New River including barrier islands from Ocracoke Inlet to north of New River Inlet. Coastal Management Field Services P. O. Box 769 Morehead City, NC 28557 919/733-2160 or 726-7021 / New -? Hanover South of New River Inlet to South Carolina border. Brunswick Coastal Management Field Services ?. 7225 Wrightsville Avenue Wilmington, NC 28403 4 919/256-4161 BACKGROUND & PRELIMINARY DESIGN INFORMATION ON A PROPOSED SCOUR JET DREDGING SYSTEM ALMONT SHIP DOCK Northeast Cape Fear River Wilmington, N. C. Background The Almont ship berth and loading facility dock has had a problem of rapid shoaling for a-number of years. The shoaling process begins immediately following-annual (or semi-annual) dredging cycles with accumulations of between 2 to 4 feet of material deposits, depending upon the frequency of dredging operations. This accumu- lation of material can cause difficulties with ship berthing at lower tide ranges when ships arrive at the dock drawing 33 or more feet of water. Frequent dredging of the shoal materials indicates that for the most part they are relatively light sand N and/or suspended silts with a high fluid consistency. Nevertheless, after long-term accumulations these materials begin to consolidate, thus interfering with ship berthing operations as mentioned above. It is felt that the nature of the shoaling process, character of the materials and relatively high ebb tide water velocities all lend themselves to removal of these materials by scour jetting to a degree that will either eliminate or greatly reduce the dredging frequency and material volume, should occasional dredging be required. The hard rock bottom underlying the general shoaling area also compliments this proposed method. The basic design and layout of the proposed scour jet dredging system•i's based on successful studies and tests by the U. S. Navy at Mare Island Naval Shipyard in California and at Kings Bay, Georgia, and the U. S. Army Corps of Engineers installation of a scour jet test system at Sunny Point Ocean Terminal near Southport, 2 North Carolina. These prior test installations have been highly successful in maintaining constant ship berthing depths without periodic dredging and have produced no reported operating or environ- mental problems. Preliminary Design Discussion The basic principle of the scour jet system is to mount a• horizontal water jet nozzle close to the harbor or ship berth bottom to agitate sediment in the water and thus prevent shoaling from occurring. The materials put back in suspension in a moving water body (river) rejoin the normal bed load materials moving along with channel currents. The scour pattern achieved by a jet of this type is tear drop in shape, approximately one-third as wide as it is long. For a berthing facility, an array of nozzles is generally placed along the pier face with a 10 percent overlap of the scour patterns to insure that no intermediate shoaling will occur. For the Almont dock the existing pier piles provide a good point of support for the nozzles and are spaced at 20-foot centers. Preliminary design sketches showing the overall project concept and layout are appended to the permit application. With this information and formulas obtained from previous studies and tests by the Navy and Corps of Engineers, a preliminary system was analyzed which would provide a minimum 66-foot scour from the face of the pier. Each nozzle will be 4-inch diameter and shall be provided with a flow of 2500 GPM. A total of 26 nozzles is used.in the proposed system. The piping system which feeds the nozzles in the preliminary design consists of a 10-inch diameter PVC manifold suspended below the pier deck with an 8-inch diameter PVC branch pipe with an 3 electronic controlled valve feeding each nozzle. A single 100 hgrsepower, 2500 GPM (110 THD) vertical turbine pump mounted on a platform with its suction drawing water directly from the harbor, supplies each nozzle individually. An electronic time controller provides sequencing of the electric operated valves on a prepro- grammed schedule. Previous test results indicate that each nozzle with a single jet operating at a time, cyclinjg from north to south with the south-moving ebb tide, should be operated for about 7 minutes at the.peak falling tide as required. Thus, the single jet cyclical operation would be completed in approximately 3 hours during peak ebb flows along the face of the dock. The system would be operated only during the period of peak ebb tide when current velocities are high, thus moving the small amount of material that would be placed in suspension along with the normal bed load in transport in the river system. Exact operating frequency requirements for the system cannot be predetermined; however, it is proposed that the system be operated initially on about a weekly basis. The annual shoaling rate at the dock is well known (based on years of surveys and annual mainte- nance dredging exercises). Based on this, it can be roughly esti- mated that only 1 to 2 inches of materials would accumulate during the one-week period (naturally, this could vary depending on seasonal rainfall and flow conditions, but the accumulations would be minimal). Therefore, it can be reasonably be estimated that only approximately 100 to a maximum of 400 cubic yards of material would be disturbed L at any one time. This would represent only a minute fraction of the normal bed load and ambient turbidity of the river system in its normal state. operating cycles would be adjusted as experience dictates it should. 4P, ... 4 Conclusions Extensive prior research and test installations indicate that a water jet scour dredging system as described herein could be used effectively to eliminate or greatly minimize annual mainte- nance dredging requirements of the Almont ship berth on the North- . east Cape Fear River. Initial capital costs of such a.system would be high, but long-term operating and maintenance costs will be relatively low, soon offsetting the high annual cost of mainte- nance dredging. It is felt that with the very minimum of material that is placed in suspension in the river system at each scour jet cycle environmental effects would be negligible. r• 0 01 ins IoW :J' Ooz -= -: f _ .i o - u c = 3 = W N W ! ? .O W t ?. / n ` Z' 4W 3 / ,r 6 < L 71 • z/ Ir <O p RCpog p ! f.. t Q C G ? ?? f ? LF- V / _ R ?8?• a W 0 • ° r k q ? nom; x 0 A. x o J O ? ? O O M N \ IJ J Y J V Y Q - wcai Ili `ON4' rr- WZ' J ?. IL lU ?? :.?a.• s ® pp• 5 C'y Z M J® 0 RED 7 ? % u Y u l W \N 4 2 J WILMINGTON tt11 !1 BEACHN SVILLE 87 1 CAROLINA BEACH ZI ? _ ? SOUTHP IL ALDH CAPE FEAR R?B D ISLAND A?P P y i C I ice( I Ty mA. ??t 3 jp Ml• pEJS.ti1 HARDWcbP 1 NJG, JI ?LMGNr/ Sf EVEp02E3, INC. wILMINGToNI N?C. \'v( .MI N c3ToN, N • c . l ?vII.MING?, Isl. C • i ?Uu?= u? u_ O d < ? rip J O ? 0 <W ? ALZ W - - 'c'. is W? L o CATS al`J•. P L.,4. N ?`? ?2a1. PROPOSED SCOUR JET ALMONTSHIPPING CO WILMINGTON,N.C. APRIL, 1987 HENRY VON OESEN & ASSOCIATES ® CONSULTING ENGINEERS 8 PLANNERS WILMINGTON, NORTH CAROLINA 28402 JOB N0.31301 SHT. I OF4 I f wx. A? J N I Op CAQ a ' 0 JI W Z V I? N J led ?0 d Q N Lo 7 r I F V i d 0 0 0 ? d 09 IQ N I0 4p,± i S a to H P t Z .0010 t12 wP _ i. -j !-x p_0 ?sn?d bno?s_.. P IT r ! ,OL-59 jut N 00 o g I T ko . I 1! . ? 1t u 1 ? ? 1 1-- ?I F + 4 ?. ' o / k Q P I EX15T cRa?ic ,f no ,EI,?GT?! CAL Cotes} OcJ I'r • !-ANC ? 2 ??FC.ANcs I~-=? C?J t•.l? CT'ioc?. o l! pvc-, ? N 8 ° PVC --r _ UPPoRZ Pf2AC1??T 4.11 t?lo?.zL1= '• ?L. 3400` • r--- 7 I r I I 1 ,? P I?? 5 ? GTl O 1?1 8" r Vc PIua ? IT 4" f jOZZLE t ???? gt? PVG PROPOSED SCOUR JET ALMONT SHIPPING CO. PL.dt?! AT t`lOZZ.LE WILMINGTON,N.C. N7;S, APRIL, 1987 G-rl a (--j ® HENRY VON OESEN S ASSOCIATES CONSULTING ENGINEERS & PLANNERS WILMINGTON, NO11TN CAROLINA 20402 JOB NO. 313q SHT. 4 OF 4 P r. REPLY REFER TO Regulatory Branch DEPARTMENT OF THE ARMY WILMINGTON DISTRICT, CORPS OF ENGINEERS P.O. BOX 1890 WILMINGTON, NORTH CAROLINA 28402-1890 May 27, 1987 SUBJECT: File No. SAWC087-N-065-0366 Ms. Estelle C. Lee Almont Shipping Company, Incorporated Post Office Box 1726 Wilmington, North Carolina 28402 Dear Ms. Lee: 0 i '987 t ff On February 6, 1986, we renewed general permit No. SAWC080-N- 000-0291 (enclosed), which provides Federal authorization for construction activities that receive authorization from the State of North Carolina. A review of your application received May 21, 1987, for a Department of the Army permit to install and operate a scour jet dredging system on the Northeast Cape Fear River at ship dock facilities, Wilmington Harbor, New Hanover County, North Carolina, indicates it to be a candidate for Federal authorization under this general permit. Accordingly, the administrative processing of your application will be accomplished by the North Carolina Division of Coastal Management. Comments from Federal review agencies will be furnished to the State. If your application must be withdrawn from this general permit process for any reason, you will be written and informed of its further management. If there are no unresolved differences of State-Federal positions or policy, the final action taken on your application by the State will result in your receiving written notice from us that your application has been successfully processed under our general permit. Only after receiving such confirmation should you begin work. Your application, pursuant to Section 10 of the River and Harbor Act and Section 404 of the Clean Water Act, has been assigned No. SAWC087-N-065-0366 and will be coordinated by Mr. Hugh Heine. He is available to address questions or comments you may have at telephone (919) 343-4725. Sincerely, Charles W. Hollis Chief, Regulatory Branch Enclosure -,I -2- Copies Furnished (without enclosure): Mr. John Parker Division of Coastal Management North Carolina Department of Natural Resources and Community Development Post Office Box 27687 Raleigh, North Carolina 27611-7687 Mr. William Mills Water Quality Section Division of Environmental Management North Carolina Department of Natural Resources and Community Development Post Office Box 27687 Raleigh, North Carolina 27611-7687 Mr. Charles Jones Morehead City Regional Office North Carolina Division of Coastal Management Post Office Box 769 Morehead City, North Carolina 28557 Ms. L. K. (Mike) Gantt U.S. Fish and Wildlife Service Post Office Box 25039 Raleigh, North Carolina 27611-5039 Mr. Randy Cheek National Marine Fisheries Service Habitat Conservation Division Pivers Island Beaufort, North Carolina 28516 Mr. William L. Kruczynski, Chief Wetlands Section Marine and Estuarine Branch Region IV U.S. Environmental Protection Agency 345 Courtland Street Atlanta, Georgia 30365 Mr. C. Robert Stroud Wilmington Regional Office North Carolina Division of Coastal Management 7225 Wrightsville Avenue Wilmington, North Carolina 28403