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Home My WebLink AboutTR-298 TOWN OF SOUTHOLD BOARD OF SOUTHOLD TOWN TRUSTEES SOUTHOLD, NEW YORK WETLANDS PERMIT This-Wetlands Permit No. .. 298........... has been granted by the. Town Trustees according to information furnished in Application No. ..381.. .... ...filed by-Applicant John Wesmantle for L.I L. s . .... .. on . MaY...29, 19...$6... A map of the proposed work will be kept on file in the Trustee Office under the application number given: Permit granted to do the following work ..Approval to bury, trench and backf ill to install 69KV electric cable conduits at submarine crossing from Island View Lane (Southold) to Rocky Shore (Shelter Island) . ................................................................................................................................................................. Location of property on which work to be done ......Island,View.. ............................Lane .................... . ....... ................................................................................................................................................................. Creek, Bay or Harbor fronting property ................................................................................................. ..................................................................................................................................................I.............. Sizeof work: Length ............................................................................................................................. Width ............................................................................................................................. HeightAbove High Water .............................................................................................. DepthBelow Low Water ................................................................................................. _Yards to be Excavated ..................................................................................................... Yardsto be Filled ......................................................................................................... Manner in which material is to be removed or deposited ......................................................................... ................................................................................................................................................................. Intendeduse of property ......................................................................................................................... ................................................................................................................................................................. Conditionsif any ..................................................................................................................................... ......................................................................................................................................................... Expiration Date a.................... Number of Inspections Required .?;Trustees..are to be,notified„uP.RR.. omR7elian..of..tJae.... work.Inspection Fees ........ %.0 .P.ad ......................................................................................................... Liability Policies in the Amount of ......................................................................................................... The validity of this permit is or may be subject to the approval of other governmental or municipal authorities. The Town accepts no responsibility in applying for or obtaining such approval. In the event that such approval is necessary, the holder of this permit shall not commence operations here- under until such approval has been obtained in writing. The failure to obtain such other approval when required shall subject this permit to immediate revocation by the Trustees upon recejpt by the 1 Trustees- of written notice from such other governmental or municipal authorities of its refusal or �1 disapproval. J TRUSTEES SCOTT L. 14APRIS Supervisor ft M. Brederneyer, 111, President d Henry P_ Smith, Vice President Albert J. Krupski, Jr: ® Town Ha} Bo95 Main Road P.O0 Box 1179 i John L. Bednoski, Jr. � John B. Tuthill Southold, New York 11971 BOARD OF TOWN TRUSTEES Fax (516) 765-1823 Telephone (516) 765-1892 TOWN OF SOUT14OLD Telephone(516) 765-1800 March 23, 1990 MauriceIP. Fitzgerald Manager, Permit Division Long Island Lighting Co. 1660 Walt Whitman Road Melville, NY 11747 RE: Wetlands Permit #298 i Dear Mr. Fitzgerald: The following action was taken by the Southold Town Board of { Trustees on Thursday, March 22, 1990: RESOLVED that the Southold Town Board of Trustees extend Permit #298 from December 31, 1989 to March 9, 1993. Enclosed please find a check in the amount of $115 .00, which represents the difference of the wetlands application fee of $150.00 which you paid and the renewal fee of $35. If you have any questions, please do not hesitate to contact this office. Ve truly yours, n . Bred. yer, III resident, Board of Trustees JMB: jmt enc. a �3 TELEPHONT (5.16)765-1892 - BOARD OF TOWN TRUSTEES TOWN OF SOUTHOLD Town Hall, 53095 Main Road P.O. Box-728 Southold, New York 11971 ` APPLICATION IS HEREBY MADE TO THE TOWN TRUSTEES OF. 'THE: TOWN OF SOUTHOLD, SUFFOLK COUNTY, NEW YORK FOR THE ISSUANCE OF APERMIT PURSUANT. TO: THE. LAWS , ORDINANCES AND REGULATIONS GOVERNING THE COASTAL AND INTERIOR WETLANDS, FLOOD PLAINS AND DRAINAGE AREAS . -OF. THE TOWN OF: SOUTHOLD, AND. THE -ISSUANCE OF PERMITS PURSUANT' TO CHAPTER. 32 OF THE CODES OF THE TOWN OF SOUTHOLD. . APPLICATION NO..,�U _DATE OF APPLICATION IDENTITY OF . APPLICANT. Long Island Lighting.Co. fff ---PHONE NO ADDRESS OF APPLICANT 1660 Walt Whitman Road Melville, NY 11747 TAX. MAP. NO. 1000-057-02 - N/A (public Street). AGENT__John- A _WeiSmaxitle�_�z,P __---_--(516)-420-613'0--_—_—__—`---PHONE NO .--- PERM IT REQUESTED TO Trench, bury and backfill to install 69KV electric cable conduits at submarine crossing. LOCAT ION OF PROPERTY FOR WH I CH. PERM I T WANTED From Island View Vane (Southold) to Rocky Shore Road (Shelter Island) . -------------- HOME ADDRESS OF PERMIT APPLICANT IF DIFFERENT FROM AFORESAID LOCATION___ N/A CREEK, BAY OR. HARBOR FRONT IMG PROPERTY Conkling Point - Crescent Beach S I zE OF PROPOSED WORK__Approximately 13,600 sq_ft. l crossing)_____ ' LENGTH_^ 3400' - (total ten h--Of crossing)__-- _�--- — -----------------------_. WIDTH approximately 4' HEIGHT ABOVE HIGH WATER - N/A DEPTH BELOW LOW WATER--Ran es from 0' at shoreline t0 -85 ' YARDS TO BE EXCAVATED_: approx_ 2000 yd5 (t0tal croS.2ing) ______________ YARDS TO BE F I u ED apgrox. 2000^"'yds_ (backfill trench with excavated material) WIDTH OF CANAL , CREEK OR BAY FRONTING PROPERTY 3400' DEPTH AT LOW- TIDE 0'-85' AVERAGE RISE IN SIDE 2.3' .DISTANCE TO THE NEAREST CHANNEL_NA-____FT. DISTANCE. PROJECT EXTENDS BEYOND SIMILAR PROJECTS IN. THE AREA NA FT. IS THIS FOR PRIVATE OR BUSINESS USE.? Business AREA ZONING-- Residential MANNER IN WHICH MATERIAL WILL BE REMOVED OR DEPOSITED Probably either jetting and/or clam shell dredge INTENDED USE OF PROPERTY improve. reliability of electric. service DESCRIBE ANY KNOWN PRIOR OPERATIONS CONDUCTED ON THE PREMISE Previous cable laid between Conkling Point & Crescent Beach about 20'years ago. ----------------------- AND WHETHER ANY PRIOR LICENSE OR PERMITS HAVE BEEN ISSUED TO' ERRECT STRUCTURES OR TO DREDGE OR DEPOSIT FILL ON SAID PREMISES AND WHETHER . ANY PERMITS OR LICENSES. WERE EVER. SUSPENDED OR . REVOKED BY A GOVERNMENTAL AGENCY ---------------- ------------ I None known DES.CRI.BE FULLY THE REHABILITATION AND PROPOSED. CONDITION OF THE PREMISES AFTER THE WORK. IS COMPLETED. INCLUDE. AN ADDITIONAL SURVEY OF THE PROJECT . SITE IF NECESSARY Excavated material will be used as backfill over the buried cable. ----------------------------------------------------------------- ------------------ j WRITTEN 'CONSENT OF THE OWNER OF THE PROPERTY, IF NOT THE SAME. AS THE APPLICANT. Highway work permit to be issued by Town. ARE THERE . ANY COVENANTS OR RESTRICTIONS IN YOUR DEED THAT WOULD PROHIBIT THIS PROJECT? NA BOARD OF TOWN TRUSTEES fj TOWN OF SOUTHOLD SHORT ENVIRONMENTAL ASSFSSMENT FORM Project information(To be completed by Applicant or Project sponsor) - 1 APPhcautlsponsor 2. Project Name —LonQ Island Lid-iting do. Buell to Southold Underground round C able System 3. Project location. Southold,_ Shelter Island, Southampton, North.Haven Sag Harbor, East Municipality Hamton County Suffolk. 4. Is prro}�pjosed action: g New..., .❑ Expansion E.Modificationfalteration 5 Describe project briefly: - Installation of 69kV pipe-type cable system (underground) from Southold to Buell Substations, making 3 sLkm rine crossings. The route follows existing roads. (See attached Project Siml for additional details) . 6. Precise location(road intersections,prominent landmarks,etc.or provide map) See attached Project Sumiu:y 7. Amount of land affected Initially acres Ultimately aces a. Will proposed action comply with existing zoning or other existing land use restrictions? KI Yes ❑ No If No,describe briefly - 9. What is present land use in vicinity of project? Z Residential ❑ Industrial ❑ Commercial ❑ Agriculture ❑ Parklandlopen space ❑ Other Describe:. 10. Does action involve a permitlapproval,or funding,now or ultimately,from any other governmental.agency(Federal,state or local)? ® Yes ❑ No If yes,list agency(s).and permit/approvals Corps of Engineers - Construction NYS Dept. of Environmental Conservation - Wetlands 11. Does any aspect of the action have a currently valid permit or approval? ❑ Yes 12 No If yes,list agency name and permitiapproval type 12. As result of proposed action will existing permit/approval require modification? - ❑. Yes ® No CERTIFY THAT THE INFORMATION PROVIDED ABOVE IS TRUE TO THE.BEST OF MY KNOWLEDGE Applicantfsponsor name: John A. Weismantle, V.P. Date: Signature PART II Environmental Assessment(To be completed by Agency) _ A. Does action exceed any Type I threshold in 6 NYCRR,Part 617.12? If yes,coordinate the review process and use the FULL,'LONG FORM EAF. ❑ Yes ❑ No B. Will action receive coordinated review as provided for Unlisted Actions in 6 NYCRR,Part 617.7? If No,a negative declaration may be superceded by anothe involved action. ❑ Yes ❑ No C. Could action result in ANY adverse effects on,to,or arising from the following:(Answers may be handwritten, if legible) Cl. Existing air quality,surface or groundwater quality or quantity,noise levels,existing traffic patterns,solid waste production or disposal,potential for erosior drainage or flooding problems? Explain briefly: C2. Historic,archeological,visual or aesthetic,or other natural or cultural resources;agricultural districts;or community or neighborhood character?Explain brie C3. Vegetation or fauna,movement of fish or wildlife species,significant habitats,or threatened or endangered species? Explain briefly: C4. A community's existing plans or goals as officially adopted,or a change in use or intensity of use of land or other natural resources? Explain briefly. C5. Growth.subsequent development,or related activities likely to be induced by the proposed action? Explain briefly. 06. Secondary,cumulative,or other effects not identified in Cl-C6? Explain briefly. C7. A change in use of either quantity or type of energy? Explain briefly. PART III Determination of Significance(To be completed by Agency) INSTRUCTIONS: For each adverse effect identified above, determine whether it is substantial, large, important or otherwise significant. Each effect should be assessed in connection with its(a)setting(i.e. urban or rural);(b) probability of occurring; (c)duration;(d) irreversibility;(e).geographic scope; and(f)magnitude. If necessary, add attachments or reference supporting materials. Ensure that explanations contain sufficient detail to show that all relevant adverse impacts have been identified and adequately addressed ❑ .Check this box if you have identified one or more potentially large or significant adverse impacts which.MAY occur. Then proceed directly to the FULL/LONG FORM.EAF andlor prepare appositive declaration. ' ❑ Check this box if you have determined, based on the information and analysis above and any supporting documentation, that the proposed action WILL NOT result in any significant adverse.environmental impacts AND provide here, and on attachments as necessary, the reasons supportng this determination: i Agency Name Agency Preparers Name P1epa1e1 Date COUNTY OF SUFFOLK ) STATE OF NEW YORK ) SS: John A. Weismantle BEING DULY SWORN DEPOSES AND SAYS THAT HE IS THE APPLICANT FOR THE ABOVE DESCRIBED PERMITS, AND THAT ALL STATEMENTS CONTAINED HEREIN ARE TRUE TO THE 'BEST.. - . OF HIS KNOWLEDGE ANDBELIEF, THAT THE. WORK WILL BE DONE `IN THE MANNER SET FORTH .. IN THIS APPLICATION AND AS MAY BE APPROVED BY THE TOWN BOARD OF THE TOWN OF SOUTHOLD. THE APPLICANT 'AGREES' TO HOLD . THE TOWN OF ,.SOUTHOLD AND .THE. TOWN TRUSTEES HARMLESS AND FREE. FROM ANY AND. ALL DAMAGES ' AND CLAIMS ARISING UNDER OR BY VIRTUE OF SAID 'PERMIT, IF GRANTED. IIGNARE OF APPLICANT .SWORN TO BEFORE ME THIS DAY OF ✓ / 191 Et1ZASf-: ; A, LRIP DY Notary:Pub;, . ",-1,,? of New York No. 30-4506M 't—!,in Nassau county / NOTARY UBL6 C Commission expires`Mtar. 30, 19.-Z/ EXAMINED / APPROVED "WETLANDS" PERMIT (CHAPTER 97) APPROVED "BOAT, DOCKS , WHARVES" PERMIT (CHAPTER 32) DISAPPROVED "WETLANDS PERMIT" (CHAPTER 97) DISAPPROVED " BOATS ,DOCKS , WHARVES" PERMIT (CHAPTER 32) CONDITIONS, IF ANY EXAMINING BODY SIGNATURE OF CHAIRMAN COMPUTATION OF FEES Approved 2127/85 Table of Contents Page 1.0 Introduction 1 2.0 Purpose and Necessity 1 3.0 Location of Project 2 4 . 0 Project,Design 3 5 . 0 Construction Program 3 6.0 Key Environmental Factors 5 6. 1 Cable Fluid 5 6.2 Aquatic and Land Use Features 6 6.2. 1 Aquatic Crossings 6 6 .2.2 Land Use 7 7 . 0 Alternatives 8 7 . 1 Overhead Transmission 8 7 .2 Solid Dielectric Underground Cable 8 8 .0 Summary and Conclusion 8 9.0 Appendices Appendix A - Route Map Appendix B References Appendix C - List of Agencies Receiving Project Summary/Environmental Permits Required 1 .0 introduction This Project Summary Report for the installation of the Buell-Southold`underground pipe-type cable system has been prepared in support of applications for the various environmental permits necessary ,for the construction and implementation of the proposed project. Because the cable is designed to operate at 69kV (69' thousand volts) it is not subject to regulations< stemming from Article VII of New York State Public Service Law; those regulations have a 100kV threshold. 2.0 Purpose and Necessity The Long Island Lighting Company is proposing to build a 69kV transmission line from Southold to East Hampton in order to meet the existing electric load and to increase the reliability of the electric system on the easternend of Long Island, as this load continues to grow. Average system load growth has been 1-2% over the last few years. However, east end electric load growth of 7% annually during the past five years has severely strained the ability of the existing transmission system to supply the area' s peak loads , particularly in the Town of East Hampton. LILCO has compensated for this load growth to the maximum degree possible by running expensive distillate oil-fired peaking generation at Buell (East Hampton) and Montauk for extended periods. Nevertheless, during hours of heavy electric use on about 60 days during the year, a single line outage on the 69kV supply between LILCO` s Tiana and Buell Substations could result in line damage on the remaining circuit and a local blackout of significant duration. Delays in implementing improvements for the area will compound the existing operating problems because the experienced load growth rate is expected to continue for at least the next few years. Actual construction is scheduled to begin in February 1987 following completion of preliminary engineering and procurement, which have been initiated. The projected completion date is April 1989 in order for the system to be available to help meet the peak summer electrical loads'. _ 1 _ 3 .0 Location of Project The proposed underground transmission line between Buell Substation in East Hampton and Southold Substation rear Greenport runs generally north and south and follows state Route 114 for most of the route (See Appendix A for Route Maps) . The total approximate length of this cable will be sixteen and a half miles , including three submarine ' crossings. Beginning from Buell Substation, the cable heads northwest on Route 114 approximately four and a half miles to the Village of Sag Harbor. In the village, the route bypasses the business district by heading north on Hempstead Street and north again on Bay Street to the first submarine crossing at Sag Harbor Cove. The distance within the village is approximately one and a half miles . Following the &00 foot submarine crossing east of the bridge, the cable continues north on Route 114 , here known as Ferry Road, through North Haven, a distance of three miles, to the terminal for the south ferry to Shelter Island. A 2 ,000 foot submarine crossing of Shelter Island Sound, east of the south ferry route, brings the cable to Shelter Island. On the island the cable' continues to follow Route 114 north to the intersection of Ferry Road and Ram Head Road. While Route 114 turns west, the cable continues north on Ram Island Road, also known as St, Mary' s Road, until the third intersection where it, too, turns west, onto Manwaring Road. The cable heads west on this road, which changes names from Manwaring' Road to Ferry Road, to Crescent Beach and the final submarine crossing. The distance on Shelter Island is four and a third miles . This third crossing, from Crescent Beach, Shelter Island to -Conkling Point , Southold, is 3,400 feet long and generally parallels the route of the existing, distribution cable crossing; The cable comes ashore at Island View Lane and immediately turns north onto Bay Shore Road which continues onto Kerwin Boulevard, passing under the LIRR street level crossing, to Route 25. This distance is approximately a mile and a half. On Route 25 the cable heads east approximately a quarter mile to the Southold Substation just west of Chapel Lane. 2 _ 4.0 Project Design The proposed underground transmission cable between Buell and Southold will be `1500 kmil, 69, kV standard,pipe-type cable. On land, the system will consist of three single conductor cables in one 6 5/8" diameter by 1/4" wall steel pipe coated for cathodic protection. Two pipes (one a spare) with 1 1/2" thick concrete coatings will be installed at the submarine crossings. Spare pipe has been included in the submarine sections of the route to expedite restoration in the event of failure at one of the three cable crossings On land, the pipe will be buried with about 3 feet of cover. At the submarine crossings, the pipe will be buried at a depth of approximately 5 feet. Manholes will be spaced about 3 ,000 - 4 ,0`00 'apart, a distance dictated by the reel size that can be accommodated by available cable reel trailers and by the permissible cable pulling tensions: The cable' s pipe will be filled with insulating fluid at a nominal pressure of 200 psi, maintained by a pumping plant with a reservoir at each end of the circuit in the substations . Leaks in such installations are extremely ' rare and the use of an environmentally benign insulating fluid will ensure a minimal environmental impact should a significant leak occur. (See Section 6.1 for additional information on the characteristics of the proposed fluids . ) LILCOts construction forces have installed several similar transmission: lines on land and three domestic manufacturers are capable of supplying the cable. The submarine crossing conduits will be installed by a marine contractor. 5. 0 Construction Program Construction is accomplished in four sequential phases: o Manhole and Pipe Installation (Land and Marine) o Cable Pulling o Splicing o Filling Line with Insulating Fluid Manholes and pipe installation on the land sections will be in conformance with all permit requirements and generally accepted installation practices . Typical installation practice would involve such construction equipment as backhoes , truck mounted cranes, hydraulic cranes, front end loaders , dump and flat bodied trucks to install the pipe in a nominal 3 foot wide by 4 foot deep trench generally located in the shoulder area of the roads 3 - along the route. Work will be progressed in a safe and , expeditious manner with regard to; traffic control and safety to the general public and scheduled so as to avoid the peak traffic periods associated with summer recreation. Work period for this portion of the project is expected to span 12 to 15 months. Marine installation of the cable will involve pre-excavation of a nominal foot deep trench along the bottom of each water crossing on the route by, clamshell or drag line bucket, operated from a 'crane mounted on a barge. Excavated material will be sidecast for later use as back fill over the cable. Pipe may be installed from a lay barge or pre-staged on shore and floated or' pulled across to the opposite shore into the prepared'trench. After pipe installation, backfilling will be accomplished in similar fashion to excavation. The sidecasa materials will be used to restore the trench to the original bottom contour. A final decision on specific methods of marine installation will be dependent on preference of the successful bidding contractor. Marine work will conform to all permit requirements and all U.S. Coast Guard regulations and will be progressed in a mannetr to minimize imidct on boating and recreational activity ilp the designated areas. It is estimated that the marine portion of pipe installation will have a duration of 9 to 12 months Cable pulling will be accomplished by positioning a reel trailer at one manhole and setting up a winch at an adjacent' manhole about 3 ,000 feet away. Although each pull duration is _expected to be one day, a three month window is allowed in the project' s schedule to cover inclement weather and set up time for each pull (about ;30 in all) . After the cables are pulled, splicing proceeds in each manhole to connect adjacent cable sections. Splicing is a continuous around-the-clock operation spanning three days per splice. It requires a trailer outfitted with tools and equipment to be positioned over each manhole to support the splice crews in this operation. All splicing is expected to be completed in 10 to 12 weeks following cable pulling. Cable filling with insulating fluid generally requires four or 'five days of continuous activity, mostly concentrated at the cable terminals and several manhole locations along the route. Both the splicing and filling operation are planned to minimize impact on the lifestyle of the residents and traffic conditions and to insure general 'safety of the public. 4 - 6.0 Key Environmental Factors 6.1 Cable Insulating Fluids The cable insulating fluid for the proposed Buell Southold Project is specified to be either Low Viscosity Polybutene (LVP) , or Dichevrol 100 (DO 100) . Both have undergone bioassay testing and have been found to be environmentally safe. LVP is a colorless , odorless liquid with a slightly oily feel; It is relatively ;insoluble in water, has low vapor pressure, and a quite-high flash point of 265°F. LVP is classified as a Class IIIB combustible liquid under the Rules and Regulations of the Federal Occupational Safety and Health Administration and by the National Fire Protection Association,`_and is excluded from special handling and 'storage requirements of lower flash point combustible and flammable liquids. LVP has undergone extensive environmental assessment by Federal and New York State regulatory agencies and was approved for use in the Dunwoodie-Glenwood underground- underwater transmission line. (See Appendix B, References. ) Toxicity tests conducted on several- animal species have indicated that LVP produces no discernible effects on these organisms when the material is ingested. LVP is biodegradable in the aquatic environment; therefore , in the unlikely event of a pipe leak, there would be no long term serious degradation of environmental quality. None of the deterious effects: of residues generally associated with spills of petroleum products would be found, as LVP is very similar to clean mineral oil. The absence of animal toxicity, combined with the compound' s known chemical identity and purity, permit the conclusion that LVP is as safe as ordinary white mineral 'oil, which it closely resembles. It is approved by the Food and Drug Administration for use as a lubricant in food processing machines. Dichevrol 100 (DO 100) , a branched alkylbenzene, is similar in many properties to LVP. DO 100 is a water white, viscous liquid with an oily feel. It is insoluble in water, has a low vapor pressure and a somewhat higher flash point of 310°F. Like LVP, DO 100 has exhibited no animal toxicity in bioassays with aquatic organisms. It, too, should be as safe as ordinary white mineral oil, which it also resembles. - 5 - The selection of either LVP or DO 100 as the cable fluid of choice will depend on availability and cost when the purchase is made. 6 .2 Aquatic and Land Use Feature 6 .2 .1 Aquatic Crossings The proposed cable route makes three submarine crossingswhich total about 6,200 feet in length. The southern crossing, Sag; Harbor Cove , is an 800 foot run across Sag Harbor Cove on the northeast side of the existing bridge. The maximum water depth is approximately" 12 ' (MLW) The bottom is largely coarse sand with occasional isolated pockets of finer sands along with smaller amounts of silt and clay. Percent composition of the three fractions average: sand - 90% ; silt - 5% ; clay 5%. Grab samples taken in January 1986 indicated isolated patches of heavy concentrations of empty shell debris. Live organisms are limited to a few mud crabs , chitons , 'starfish, slipper shells, near nut shells and anemones. No concentrations of clams , oysters or scallops were found. Tidal currents are estimated at about 1 1/2 knots at strength of tide. Shorelines on both sides of the crossing are sandy beaches or rip-rapped bridge structures . The only wetlands vegetation present is a small stand of 'Spa_r_t- a alterniflora which is located at the sout- Beast corneaol ttFie bridge. It will be bypassed by the proposed crossing route. The middle crossing, between North Haven Peninsula and Shelter Island, is a 2,000 foot run proposed to be located along a line approximately 100 ' feet to the east of the South Ferry Company' s terminals. Maximum water depths of approximately 42 feet occupy the center one-third of the crossing. Currents are quite strong, running, at better than 22 knots at strength of tide, preventing the accumulation of fine sediments or dense organism communities. The bottom is composed of coarse materials whose nature required sampling by dredge rather than by grab. Samples showed as much as 90 `,percent of the bottom to be stones up to 6 inches in diameter. Smaller fractions were found in the - 6 - proportions: , sand - 89 .9% , silt - 7 .2% , clay 2.8% . Live organisms , found in very low densities, were; limited to a few slipper shells and paper spoon shells No commercial shellfish were found. Both landfalls are across sandy beaches with no wetland vegetation present: The north crossing runs 3 ,400 feet from Crescent Beach on Shelter Island to Conkling Point in. Southold. It follows an existing submarine cable :crossing route which is indicated on NOS navigation chart No. 12358 . Maximum depths are approximately 85 feet at the middle and southern part of the crossing, shallowing to about 30 feet and less at the northern end. As with the middle` crossing, currents 'sun at better than 22 knots , and the bottom is composed of` coarse" materials dominated by stones (about 50%) . 'Finer materials, where present, are in the proportions: sand - 84.3%, silt 9.5%, clay 6.3%. The benthic community at this crossing was a bit more diverse and populous than at the other two, but was still limited by high currents and hard substrate. Organisms found in ;.greatest abundance were slipper shells, near nut shells and mud crabs. 6. 2 .2 Land Use The proposed transmission line willbe located entirely underground, either within existing roadways or along the shoulder of these roads. There will be no visible, above ground structures with the exception of the two oil Bumping stations and reservoirs which will be located entirely within the electric substations . There are both mapped and unmapped freshwater wetlands adjacent to some of the roadway used as the cable route. The location of the cable within the roadway or shoulder will avoid any impact on these wetlands. - 7 - I_. 7 .0 Alternatives 7. 1 Overhead Transmission An overhead transmission line has been ruled out because the Town of Shelter Island and the Village of North Haven have ordinances which prohibit new overhead electric transmission construction. In addition, in response to .the Company' s inquiry, the Towns of East Hampton and Southampton, and the Village of Sag Harbor have informed the Company that they are opposed to overhead construction for this line. 7 .2 Solid Dielectric Underground Cable The Company has conducted an engineering and economic analysis of solid dielectric vs, pipe-type cable. That analysis showed a very small economic advantage for the solid dielectric cable that was easily` outweighed by the superior reliability of the pipe-type cable. Environmentally, the construction of the pipe-type cable involves considerably less disturbance because of the smaller (width) trench required for installation. In terms of operational environmental impacts; the only difference is the small potential for a leak of the dielectric fluid from the pipe-type cable. This is mitigated by the choice of insulating fluids , which are considered "environmentally safe" on the basis of extensive environmental 'assessment including animal toxicity tests. 8 .0 Summary and Conclusion In order to increase the reliability of electric service to Long Island' s east end, the Long Island Lighting Company proposes to construct a 69kV underground transmission line to connect the Southold Substation on the north fork with the Buell Substation in East Hampton on the south fork. The 16-1/2 mile long route, which includes three submarine crossings , follows existing roads and highways. It will be buried along its entire length, including the submarine crossings. The line will be a standard steel walled, pipe-type cable filled with an insulating fluid selected for its environmental compatibility. Construction is proposed for the, period February 1987 to March 1989 , but only a short length of roadway will be open at any one time. Work will be scheduled to avoid disruption of land and boat traffic during peak summer travel periods. 'Once completed, the project will have no visual impact. 8 _ Potential for environmental impact during construction is minimal because the line will be buried within existing roadways or along their shoulders, thereby avoiding several adjacent freshwater and tidal wetlands. Impacts at the water crossings will likewise be minimal because of the absence of vulnerable tidal wetlands at the crossing. landfalls , and minimal benthic populations or commercial shellfish along the proposed routes. New York State Department of Environmental Conservation guidelines ;for determining compatibility of projects with wetlands, find that installation of underground electric utilities involving restoration of existing ground'elevations is generally compatible, and a (permit is required.- The nature of this project will not substantially alter or impair natural'conditions or functions of any tidal wetlands. The project is fully consistent with the policies of New York' s Coastal Zone Management Plan and proposed waterfront revitalization plans of several local agencies. All municipalities along the route and all regulatory agencies having jurisdiction are being notified of the project. A list of these agencies is included in Appendix C. - 9 - APPENDIX A Route Maps OAIMRrW.,VISIMIS OREENPDRf ?9Zd NEADOWCREST DR, SREEMPORT YORKTOWN NE/GIITS, At Y- NAkSOR O ADeLE A+.au6voeY ENARZES F• armw f.INNINF PT. Urrca./ri✓Are: eD. _ -�� Jt!![T6C LSLAND, AI.Y. P/OIES N Z \ ® TOWN OF,*A&rK Ind.AID _ever $ IAI ,00 05, NNI nu.ro aEww. \� NNI CXatE AREA ('OWKUAlG \NZ�•'� ZOCA710N OF PRO)0054W PD/,VT ► \\ \ rJUBMIU E CONDUirS(2J \\\'�osc ��o `C� St1ECTER �� a� \ CONKLIN6i ISLAND f MAUrleAC M/LES /It f�p0� "� Ns" LOCATION MAP �p� ```.r \\�r�'J from U.S.C. 6.5. CNART NQ 363 700 0 700 \ SCAL E IA!FEET �E=T NECK 4 5AMITER ' ap. /SLAAID as s IN.N.M/. t.3' LAA1.W, E4E11. 400 0 400 2 ST6E[.C0400175 FOR ELEC, CABLE 6 TG E S&R1Eo $,OFT wwaoNTXL 5C4 LE /N FEET �� BE2ow NATURAL 80TTOM 40 0 40 YERTiCAL sGLE w mer_ peOF/LE 400KIA/6 EAST APPLICATIOAI BY- PZOP0.5fD StIBMAelAYE_ CONOI17S L OIVG ISL ANO t 161,1TW4 CO. CROSSING CHANNEL BETWEEN A11CKSY14lE, NEW YOA?K COWLING Pj. '720MN OrSOUTNOlD AND SyfLTER ISLAND, COUNTY agrt OF SOFFOLK, NEW YORK • ILo/0 cscco oar,. o t-/35-5 9NELTf? / .7r1�c7�¢ ISL.A.vo tSU D N 0 r v' . ,i'011TN ` r. FERRY !{!LL{ I R LOCArtON Of ` PACROSEO ;OA/DOJTS(Zr� { 8 <tooD 2 io\ TYMOAL N 'o pT g6 ?•vw NOQTN NA YEN 4 �_ rat AlN/t/3t/L4 1Q0o 900 0 1800 0 WAUTJICAL MILES 1(Q .9CAIL AV AFfr AXAr/aV M4P i �ip, AeaNu.S.C.EC,5. CYAeT'AV,563 64EASOA/ pT NORTH NAVE" SOurH FERRY/NC. 40-FERRY RD, SNELrER MAMD,N.Y. PLAN O® LORRA/NE 2 ANDERSOAI MOM AMA114W SA6.4AR6OR,M y. 2 ST.EEt FONOurTS fO/C ELFC, - M.K.W2.3 C94LA9 TO BE 6✓R/EO S.O iT biLOw ANTLRAL LdOTTOM -��,� ♦1,L•W. ELEV �+ Soo 0 yp0 MIORIZOMML "a AVAORT 40 0 do Y.`` . , YF?TICAL SCAa Av FEET '---" - Moor rz zoos/M` eAtsT APPI-ICA770AI 8Y l'24POSEO SUBMARINE COMMrS t ONG ISL AND L 14W 7711V6. CO, C QOSS11V 6 CRANNEC BFTWS CN HICKSY144E, N46W YORK r11FL7ER /SLAND AMP NORP4 HAVEN 0 COUNTY OF SUFFOLK, o.►�F NEW YORK w0 42010 t/t CO DWO AO L-I36-5 N O 3q'ATt VAA9W W" 230 usr 6s•S r1 PeNrzvsucA P kAV& J "mow+iON&, V.V. awAffr ac sw4p',r N t}?fAVTY A�S[/fFOLx ' Q LOGI nU v aK ~ a15 PROpOSEO JU6t*/L�N6 CONO/liiTS (2I N •OG� J46 NAN~ STAG NAROOR QO✓t 1` `��J �\ 3 0.J N- A(IrICAI. MILES Ile po00 4 wET c �s . 40CAT/OAJ MAP LAV p3 q/ SAG "AZ30,e PLAN 600 goo o boo CALL /4/FLET ,H.a..W. Z-5, 2 STBEL.GONDUATS foR FLFG,.. cga[.f To &A` Bury&o S•OET .�- &SLOW �yA1ruR4L BOTTOM v_�_� �. P,2 jo Egg tooKiwy EaJr too o 200 MORI7GNTAL SCALE AV KPJir YfR7fcA1 4414F ,w FiET ADPLICAT/ON 8Y P'20POSE0 XZ1,60 '/NE CONOv/TS LONC1 1SL ANO Llq#r G CO CRO.u1N(, CHANNEL ,BEfWfF N/CKSVIL ZE, NEW YORK NO!?TN HAVEN ANO S't4t? NQR802, GOUNTY Of SUFFOLK, oArs NEW YOR K • Wo f20io liLCc DWla A0 APPENDIX B REFERENCES Alexander, J.E. , 1973. A Study of the Solubility of LVP in Seawater. Prepared for theLong Island Lighting Company. New York Ocean Science Laboratory. Montauk, New York' Biospherics Inc. 1984. The Acute Toxicity of Dichevrol 100 to Rainbow Trout (Salmo airdneri) , Prepared for Chevron Environmental Heat Care Center, Inc. Richmond, California Biospherics Inc. 1984 . The Acute Toxicity of Dichevrol 100 to Sheepshead Minnow-(Cyprinodon varie atus) . Prepared for Chevron Environmental Heat are Center, Inc. Richmond, California Cosden Oil and Chemical Company, 1986. Cosden Polyvis Polybutenes, Technical Bulletin, Number 43 , Windsor, New Jersey Food and Drug Research Laboratories , 1986 . Feeding Studies with Polyvis - SH on Rats and Dogs . Submitted to Cosden Oil and Chemical Company. Maspeth, New York Leibovitz , L, 1972. Toxicity Studies of Low Viscosity Polybutene (LVP) in White Pekin Ducks. Cornell University Duck Research Laboratory. Eastport, L.I. , New York Quirk, Lawler and Matusky Engineers , 1972 . Analysis of Possible Toxic Effects of Low Viscosity Polybutene (LVP) on Fundulus: heteroclitus and Artemia Salina. U.S. Army Engineer District, 1975. Final Environmental Statement: Proposed Con Edison - Long Island Lighting Company' s Power Transmission Cable, New York, New York. (Dunwoodie - Glenwood) . APPENDIX C AGENCIES RECEIVING PROJECT SUMMARY/ENVIRONIIENTAL PERMITS EEjUIRED U. S. Army Corps of Engineers - Permit Required • New York State Department of Environmental Conservation Wetlands and -Dewatering Permits Required • New York State Department of State - Statement of Consistency with,Coastal Management Plan Required. • Suffolk County Department of Health Services - Permit required under Article 12 of Sanitary Code (Oil 'Pumping Stations) ° Town of Southold - Wetlands Permit Required ° Town of Shelter Island - No Environmental Permit Required • Town of East Hampton - No Environmental Permit Required • Town of Southampton - No Environmental Permit Required • Village of North Haven - No Environmental Permit Required ° Village of Sag Harbor - No Environmental Permit Required