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Resolution 230-1981RESOLUTION NO. 230 -.1981 WHEREAS, the BOARD OF COUNTY COMM-ISSIONERS OF MONROE COUNTY, FLORIDA, has recieved an application from Bruce Kaye and WHEREAS, in compliance with State Statute, it is necessary as part of the permitting procedure to read the following Biological Assessment into the Record, as follows: The applicant proposed the maintenance of his boat basin and access channel facilities and adjacent shoreline. Maintenance activities pro- posed include dredging silt and debris from said basin and channel areas, filling the extreme landward portion of the basin area, repairing and existing riprap revetment and installing a floating weed control gate. The proposed maintenance dredging work will entail the removal of 560+ cu. yds, of various materials from the existing basin and channel areas. This work will be performed by a small, barge -mounted, pump dredge which will deposit the spoil materials into a 90 x 90 x 1.25 ft. diked dis- posal area located on the applicant's adjacent upland property. The proposed filling activity will entail the deposition of 270+ cu. yds, of clean rock fill material in the landwardmost 30+ ft. (26 ft. average width) of the boat basin facility to a height equal to the existing upland. elevation (ie, +3 ft.; MSL). The waterward interface of the pro- posed filled area will approximate a 1:1 slope. The proposed riprap revetment repairs will be effected by the "careful positioning" of an unspecified.:_ amount of unspecified size boulder riprap materials along a 100+ ft. section of the applicant's southern property shoreline be- tween the +2.45 and -1.15 ft. elevations (MSL). The proposed weed control device will be constructed of a series of interconnected panels of 2 x 2 inch mesh net which will be suspended across the middle of the basin area on flexible line and supported with floats between the water surface and -2.0 ft. elevations. The applicant also states that precau- tions will be taken to avoid "appreciable temporary degradation" of state waters during all construction activitiesk All of these proposed activities are offered in the interest of protection the applicant's boating -related facilities against detritus/silt accumulation, shore- line attrition and hazarc'ous navigation. The applicant's property consists of a long (450+ ft.), narrow (110+ ft.), rectangular, residential tract of nd situated near Tavernier on the Atlantic Ocean shoreline of Plantation Key. It is bordered on both sides (north and south boundaries) by similar, private, residential tracts of land and on the west by State Road 4A roadway right-of-way. The property's upland areas vary between those which have been variously cleared for home development and accessories (ie, driveway, yardspace, landscaping) and those between the existing house and S.R. 4A which appear to be in natural, pristine condition. The latter areas contain flora typical of the Florida Keys hammock environment such as West Indies mahogany (Swietenia mahogani), gumbo limbo (Bursera simaruba), poisonwood (Metopium toxiferum), joewood (Jacquinia keyensis) and wild tamarind (Lysiloma latisiliqua). Developed upland areas surrounding the applicant's house contain Australian pine (Casurina eugisetifolia), coconut palm, a variety of tropical exotics and, at the rear of the house a large (100 x 100 ft.), onen lawn area. Predominant upland sub- strate is a shallow layer of soil (in natural areas) and limerock fill material (in developed areas) over limerock bedrock. The only tran- sitional -type vegetation observed on the property consisted of patches of sea purslane (Sesuvium spp.), daisy (Borrichia spp.), blite (Suaeda linearis) and seashore salta_rass (Distichlus spicata) growing along_ the edges of both the basin and natural shoreline property areas. The applicant's property is bordered to the east by the basin access channel and adjacent shallow -water submeraed lands all contiguous with Fawk Channel and Class III (Section 17-3.681; F.A.C.) Atlar_ticOcean waters. Although the proposed spoil disposal area is situated on adjacent up- lands property (see photo), the majority of this project is located around the applicant's existing boat basin with access channel and natural shoreline areas. The existing basin is presently bordered by a concrete dock with Tiki area (south), a boat launching ramp (southeast) and riprap revetment (remainder: except for 10 ft. long concrete seawall bulkhead at basin's extreme landward terminus (west). Among and below the riprap revetment bordering the sides of said basin are red mangroves (Rhizophora mangle) interspersed with patches of the transitional flora cited above. The largest and most significant mangrove growth exists along the sides of the extreme landward portion of the basin area (ie, within the proposed fill area). All of the existing riprap revetment on the property is variously -sized (1 in. to 1 ft. diameter) and in varying conditions of disrepair (ie, gappy and sparse in areas). The natural Property shoreline area is presently gradually sloped (1:8 slope) . Submerged project areas were inspected by the author on February 26, 1981 at a period of mean water. Submergent basin areas vary from landward to shoreward terminus areas. Extreme landward submerged basin areas have experienced a substantial amount of detrital/silt accumulation and, as a result, water depths in this area were extremely shallow (ie, 1-2 ft: MSL). Probing measurements indicated the silt layer in this area of the basin varied between 1 and 3 ft., in the lateral and central basin areas, respectively. The only vegetaion in this area (other than the mangroves mentioned above) consisted of filamemtous green algaes. Central basin areas (ie, adjacent to dock and ramp) exhibited the great- est basin depth (5-7 ft., P4SL), least amount of silt/debris accumula- tion (6inches thick) amd the least amount of Submergent vegetation (isolated; -,small patches of green algae on available substrate and at basin edges). Mobile marine fauna observed in this area included glass minnows (Anchoa spp.), several unidentified species of juvenile fish and a large population of Cassiopeia spp. anemone. At the basin mouth, the water depth shoals up to -4 ft. (MSL) and benthic vegetation increases to include a substantial growth of both green and brown algaes. The basin access channel proceeds 300+ ft. from the mouth of the basin to an existing 25 ft. wide x -8 ft. deep channel running approximately parallel to the applicant's shoreline and providing ocean access for the applicant's northern neighbor. The majority of the access channel measured -3.5 to -5 ft. deep (PZSL) at the time of measurement. Hater depth at the channel's waterward terminus (ie, last 50 ft. prior to intersection with other aforementioned channel) measured -5 to -8 ft. (PISL). The access channel width varied between 10 and 15 ft. Channel substrate consisted of a 1. to 2 ft. thick silt/sediment layer over a bedrock substrate. The channel biology varied over the length of the channel, presumably in accordance with depth and resultant wave action. Approximately 20-30 ft. waterward of the basin mouth (ie, beyond the algae area mentioned above) patches of shoal grass (Halodule wrightee) and turtlegrass (Thallassis testudinum) begin. This shoal grassJvege- tation gradually increases to a uniform channel bottom coverage and continues to 50-75 ft from the basin mouth. Waterward of this area, shoal grass vegetation diminishes and turtlegrass vegetation increases to a lush, complete channel bottom coverage at the 100+ ft. contour. This lush turtlegrass vegetation continues thereafter to the channel's waterward terminus mentioned above. The channel terminus area (ie, last 30-50 ft.) is presently the only unvegetated channel area exhibi- ting a predominantly open, sandy bottom. Both among the seagrasses and in isolated, open, sandy spots Cassiopeia spp, anemones, sponges, green and brown algaes and hard corals (Siderastrea spp.) were observed with- in the channel area included Anchoa spp. minnows, mojarra (Gereidae spp.) and several inidentified species of juvenile fish. Adjacent submerged lands appeared to be in natural, pristine condition, of excellent quality and typical of Florida Keys shallow -water marine environments. Water depth, varied between -2 and -3 ft. (MSL) through- out the access channel area. Predominant Thallassia spp. seagrasses are lush in this area and are interspersed with isolated algaes (Pinicillus, Halimeda, Batophora, Padina, Acetabularia spp.), sea anemones, sponges, urchnis and hard corals. Natural submerged substrate consisted of a firm, thin (less than 1 ft thick) sediment layer over bedrock The primary adverse impact of the proposed filling activity will be in the impoundment and eventual destruction of the 200+ sq. ft. of mature (3-15 ft. high), healthy red mangrove growth presently existing along the edges of the proposed fill area. Beneficial impacts are expected to result from the partial elimination of a presently stagnant, aesthe- tically unpleasant submerctent area. The proposed maintenance dredging of the applicant's basin and access channel areas is exempt from Departmental permitting authority pursuant to Section 17-4.04 (d) of the Florida Administrative Code. It is here- in estimated that, if undertaken with proper water quality controls, said dredging activities will result in the destruction and loss of 31 000+ sq. ft. of seagrasses and algaes presently growing on the channel bottom (in addition to an unspecified amount of various other banthic fauna). This vegetation provides a variety of benefits for the local marine ecosystem including increased productivity, water quality enhance- ment and fishery breeding and nursery habitat. For this reason, it is suggested that said dredging operations should proceed carefully and selectively in an effort to preserve the maximum amount of existing channel vegetation. A reinspection of the channel area on March 2, 1981, at a period of low water, indicated a definite need for some type of channel maintenance; however, it is believed that, if carefully under- taken, such activities could avoid a substantial amount of the afore- mentioned seagrass destruction. It is expected that, if properly employed the proposed weed gate will serve to assist in preventing future detrital accumulation within the landward portion of the boat basin area. However, due to its proposed location (ie, central basin area), it is expected that this mechanism also will merely effect a shift of this problem 40+ ft. waterward of its present location rather than alleviating the problem itself. while this device, if functioning properly, can be expected to halt further detri- tal instrusion into the basin facility beyond its point of location, it will not prevent the accumulation of detrital material, in general. For this reason it is herein suggested that this device be periodically maintained after installation to prevent detrital accumulation in front of the device. Such maintenance might consist of "skimming" detritus caught by the device with some type of net prior to its sinking and creating putrescent submergent deposits. Since there is little present existing vegetation within the proposed riprap revetment maintenance area, it is expected that, if proper place- ment techniques are utilized, the impact of this portion of the project will be minimal. BE IT RESOLVED BY THE BOARD OF COUNTY CON14ISSIONERS OF MONROE COUNTY, FLORIDA, that the above Biological Assessment has been read into the record and duly considered pursuant of Florida Statute 253.124 by the Board of County Commissioners of Monroe County, Florida, this 28th day of July scheduled meeting. (Seal) Attest : LPH li , Clerk 19 81 at a reglarly BOARD OF COUNTY COMI-IISSIONERS OF MONIRO, NTY, FLORIDA y ."�"`'`' C_ V 9 Mayor APP OVEO At YO POW AND LE" SDI ft-y. BY Attorney's Ofties iOARD'OF,COUNTY COMMISSIONERS Wilhelmina Harvey, District 1 Curt Blair, District 2 Mayor Protem Jerry Hernandez, Jr., District 3 MAYOR George E. Dolezal, District 4 Ken Sorensen, District 5 _ y �� " 1 04` .l 0UNTY o MONROE KEY WEST, FLORIDA 33040 (305) 294 4641 Monroe County Legal Department Key West, Florida 33040 Henry F. Weinkam, Director Building, Planning & Zoninc P.O. eox Room 216 Wing II Public Service Building Stock Island, Fla. 33040 e I, the undersigned, do hereby attest that all date and information is complete in the package of the applicant as follows: 1. Certificate of Complete Enclosures_ 2. Permit >� 3. Application for Permit 4. Site Plan 5. Location Map 6. County Biologist Report 7. DER Assessment 8. Resolution BY DATE_ /I/ ° PLANNING, BUILDING & ZONING DEPART11ENT PErL MONROE �= � PEFu41T FOR EXCAVATION, THE DEPOSIT OF NO. COUNTY FILL, OR STRUCTURAL ACTIVITIES IN THE WATERS OR WETLANDS OF MONROE COUNTY 1) Property owners name & mailing address 2) Date FOR DEPARTMENT USE ONLY Bruce Kaye 2-lP-81 4430 Prairie Ave. Resolution No. Miami Beach, Fla. 33140 3) Phone number (305) Date: 672-1.290 4) Contractor or agent's name, mailing address & phone number Roberts & Egan, P.A. 217 South Adams Street Tallahassee, Florida 32302 904/224-55169 1 5) Legal description of property: I Section 5 KeyPlantation Subdivision 1. Township 63 S Lot 5 Block or 473-697-698 f Range 38 E Street, road or mile marker Old State Road 4A Volume of material: dredged/excavated filled deposited 557c.y. c.y. 266 c.y. 557 c.y. waterward landward waterward landward of M.H.W. of T1.H.W. of M.H.W. of M.H.W. ZONING: RU-1 PURPOSE: Cost of Permit Estimated cost of Construction Approved by Chairman BOARD .OF COUNTY CO�LMISSIONERS OF NSONROE COUNTY, FLORIDA Biologist Comments - Restrictions or Special Conditions if any: Coov_ in File Date Builuling Of-icial MO•NROE � C O U N T Y Q�P r'LnMIING, BUILDING & ZONING DEPARTME... PERMIT APPLICATION FOR EXCAVATION, THE DEPOSIT OF FILL, OR STRUCTURAL ACTIVITIES IN THE WATERS OR WETLANDS OF MONROE COUNTY 1 Property o.�ners name & mailing address 2 Date For Department Use On] Bruce Kaye 2/18/81 4430 Prairie Avenue Miami Beach, Florida 33140 3) Phone number 305/672-1290 Contractor or agent's name, mailing address & phone number Roberts & Egan, P.A. 217 South Adams Street Tallahassee, Florida 32302 904/224-5169 5 Legal description of property: Section, 5 Township, 63 S Range, 38 E Key, Plantation Subdivision, Lot, 5 Block, 3_6i�7 (per Street, road or mile marker, old State Road 4A (if acreage) /' 1/ -/ f3b. Describe the proposed activity, method yards), to be excavated or discharged. See Exhibit "A" volume o_f material: s of construction & amount of material, dredged/excavated n cubic 557 c.y. -- c.y. 266 C.y. 557 C.y. waterward landward waterward landward of M.H.W. of M.H.W. of M.H.W. of M.H.W. 7 Name, address & zip code of adjoining property owners whose property affronts water way. Col. Floyd C. P. 0. Box 593 Tavernier, FL Egger 33070 Sanford Reynell 1610 Bay Drive Miami Beach, FL 33141 This completed application form will be accompanied by the following, or it will NOT be processed. I a) Two (2) sets of drawings, on 82 X 11 paper, showing location, plot plan, top view and cross section of proposal, drawn to scale. b) Application processing fee as follows: $25.00 for dredge, fill, docks OR any structures affronting natural water bodies. $10.00 for vertical seawalls on —man-made bodies of water. $2S.00 for any combination of the above activities per site. Application is hereby made for a permit to authorize the activities described herein. I certify that I am familiar with the information contained in this application, and to the best of my knowledge & belief such information is true, complete & accurate. i I further certify that I possess the authority to undertake the proposed activities. All provisions of laws and ordinances governing this type of work will be complied j with, whether specified herein or not. The granting of a permit does not presume to j give authority to violate or cancel the provisions of any county, state or federal law regulating Construction or performance of construction of this type of facility. /�iG Q1Sel _ Signature of applicant/ agent Date TFor DtmenteparUse On�� Person ,pting application Fee & receipt # Approved by Assistant Director Cost of permit Estimated cost of construction ROBERTS AND EGAN, P.A. d og"a U41.+► 9. ��9ta,za g.s.X.. . Robert Dennis Environmental Biologist Department of Building and Zoning Post Office Box 437 Tavernier, Florida 33037 Dear Mr. Dennis: 24 77 C'7wLd ffi.. &eef c�- gad o ice 90, 1386 J a�a�iaeaee, ��onida 32302 904 224-5169 April 23, 1981 RE: DER File No. 44-39186-5E, Mr. Bruce Kaye In response to your letter of April 16, 1981 we enclose a copy of our letter forwarding the Department of Environmental Regulation's biological assessment to the Building and Zoning Department in Key West. We continue to be unclear as to the location for filing for County permits and approvals under Chapter 253.124, Florida Statutes, as well as the procedures that you use. If you have any printed materials that would help us in this regard we would appreciate receiving copies. We also enclose a copy of a sketch submitted to the Corps of Engineers detailing the area for mangrove replanting. We believe that we have reached agreement with all of the affected environmental agencies and upon receipt of the County permit, other state and federal agencies will act favorably on our request. The revisions which have been suggested include: 1) Efforts in mangrove replanting in the designated area be continued until 80% survival is achieved; 2) Stringent turbidity control measures be used during dredging; 3) The weed gate be moved to the basin entrance; f' "r' ' DER SO. FLA. U{STR:CT S ir' �• I �1 BRANCH OFECE -01 i98t � FtO� tDA March 19, 1981 MARgTH10;. Robert Shakeshaft U. S,. Army Corps of Engineers ' Post Office Box 4970 Jacksonville, Florida 32232 M RE# Application no. 79K-1205, Mr. Bruce Rape Dear Mr, Shakeshaftt In response to your request, we have prepared an additional sketch showing -the -location of the red mangroves to ba planted. we believe that this area will be large enough to allow successful revegetation and is in excess of that square footage requested by the National Marine Fisheries service. Please lest us know if additional information is desired. . Sincerely, ROBERTS & RGAN, P.A. Robert A. Routa RAR/hh Oct Richard W. Cantrell r Robert Dennis April 23, 1981 Page Two 4) Only large diameter rip -rap stones be used; and 5) Care be exercised through the movement of barges during maintenance dredging to prevent damage to adjacent seagrass beds. Mr. Kaye has agreed to the stipulations being made part of the DE R's permit. Please let us know if you _require additional information and it will be immediately supplied. Sincerely, ROBERTS & EGAN, P.A. Z�/' A Robert A. RoutA RAR/hh Enclosure CC: Mr. Bruce Kaye cross section Red ' be Platted nt-ers Detail of Mangrove Planting Application by Mr. Bruce Kaye -ft ,re r ,.�.r,. , :..sxirw�,e;�,,...-.r_,.+�u.w, :t�'aa�b�e� l��►.s .�>r..a��r..�... ...,.. _.....,- 4 ROBERTS AND EGAN, P.A. ola4 og" °wa.. g. Q. eta Bans Robert Dennis Environmental Biologist Department of Building and Zoning Post Office Box 437 Tavernier, Florida 33037 Dear Mr. Dennis: 247 5wA lLdame 8&.t Pad ��iccce��JDnoc 4386 J a tLadia eaee, �I &W, 32302 9044 224-5469 April 29, 1981 RE: DER File No. 44-39186-5E, Mr. Bruce,Kaye This letter is with reference to our telephone conference on April 28, 1981. We have agreed with the Department of Environmental Regulation and U. S. Army Corps of Engineers to certain modifications outlined in our letter of April 23, 1981. We have been assured that the state and federal permits will be issued upon favorable action by Monroe County. In addition to the work for which permits are requested from the state and federal agencies, Mr. Kaye proposes to place 500 cu. yds. of material in the upland area between his home and the ocean. The material will be spread evenly to raise the elevation of the property approximately 8 in. The material will be obtained from a commercial supplier and trucked in to the site. Therefore, please amend our application to include a request for county approval for the placement of this 500 cu. yds. of material. We understand that this application may be able to be heard by the Commission on May 19, 1981. Please let us know if this is possible and also if additional information is required. Sincerely, ROBERTS & EGAN, P.A. Robert A. Routa RAR/hh CC: Mr. Bruce Kaye Ed Kloski - General Contractor Route 1 Box 62 Tavernier, Florida 33070 (305) 852-8013 Bob Dennio-County Biolo6ist Monroe County Plannin6 & ZoninS Monroe County public Service Building; WInZ 2, Stock Island Key ,nest, Florida, 33040 Dear Bob, As reEards our conversation of June 1st about the "Kaye Project", (maintainance DredSing)., LoInF before the next meetinG of the Commission, that as an addendum to the permit we would like to request that we be allowed to repair the existinS rip -rap alonS the shoreline. as you have seen for yourself, parts of the existinv rip -rap have eroded and need to be repaired to avoid further deposition in the basin & surroundinS waters. Your assistance in this matter would be appreciated. Sincerly, Ed Kloski F.XUBIT "A" I. Activities: Re: Mr. Bruce Kaye's Application. 1. Maintenance & clearing of silt & debris from existing channel within property. 2. Filling at end of docking area to a line behind existing concrete dock. 3. Repairs to existing southern spit to prevent further attrition of rock rip -rap and small beach due to high wind & wave action. 4. Floating gate to hold floating debris from entering; dock area & eventually rotting. II. Performance 1. This activity will be performed by a small barge mounted dredge, delivering the material by pumping to the upland portions beyond the High Water mark as established by G.A. Crowshaw. The disposal area will be diked and precautions will be taken so that no appreciable -temporary degradation of State waters happens. Total Volume dredged waterward of OHW = 557 c.y. Total Volume deposited in 0.09 acres landward of OHW - 557 c.y. (1.25 ft.). 2. This activity will be performed by depositing; clean rock fill in order to foreshorten the dead end area of the dockage basin to prevent a foul nuisance area which tends to exist due to onshore winds & tides. Total Volume of clean rock fill waterward of OHW - 266 c.y. 3. This activity will be performed by careful positioning of clean rock rip rap to prevent attrition of the existing exposed softer materials due to onshore wind & tide action. 4. This floating gate is meant to enhance the cleanliness of the dockage area anci small sandy beach from floating debris resulting from onshore wind & tide action. 1 I I . tree i It is in the best public interest that all measures be taken so that rotting debris does not accumulate in existing longer dead ends, and also that naviga- tion of existing channels be preserved by maintenance. Also, the prevention of attrition of existing land is an added consideration. .., ..... -a-.gat:+�+ 25* ram, "ki 0<n 0.0 MLW FIrls r 80 T T. i*) -3.40 /.B" d ✓. sur f' U-9,e/r S�gE ZEMoYEv / A/oTc C=I -S-4o -KEMAJAI No OKEDy!/dfi -Z2U.►' BorToM S .// �� 32' �LL4ca ""S•OT Y/-IC,�'.Z 3fC / TION , 5 0 5 feet Vert LQi'AT (�iJ � 011 _ �: ggvoo 40,000 10 2F fee l ya•�t, R4*0 W7CN fROM /1W4 -AW //fC 3 old (FORMeRC Y C f GS BSo + 40 ► /r'LE')ti8/-4 IL / MESK P di6� p5 Epp �µ�"' a _ PE- OF lx-lajT__� 1TE ��� Qp1 Y'IA sdo G p ' 09 i OP,P , fj «. G (7eq Y iss.00' 2 ' Z 0 26 ' w i De A vole � A KEPL,iN1 -, p 1. 100 co"vc, . - _ 1 ♦ 26 0 O •. 5A. 09 COtaMNi tiq�N' <� r QE 637.H0' / c< ,Ii ` �L04T � :lyE -v"•.o y � „� ! �P str t 0 NC p/ k P. \� • 140�ac tea'+ �7Z,4V7 C• 9"w 1 -_ 1 OCEAN _ dYc�l�tL� G L. E M H W i ,¢/P• AUP SEC %. A A � � �"0p L L , ♦ 1. � .� � w 4-/, / 141 - 5-00 t 2/P- (?4P Oc Te /L_ 1'UKPOSE= /eeS Aorot/O/; of P,e0P0SfO CLEANING i access RCS TORAT/ON Of C'fXIVWTL E OJlTUM , Nleon sea level /N' /n/ond Nowk Chonoe A0J4CEN7 1'R0Pf2TY OW,NfRS: COUNTY OF Monroe STATE f/o-/✓o O Co% f/oy d C. Eg y er \ `�. + -� 9PPL /C,4T/O/'/ 3 Y Bruce O Soofo,-d Dr4Tf 8/ 7177 PE✓.717 77 . TOPS ' �VFORM 3397 LITHO M DEPARTMENTAL CORRESPONDENCE DATE June 17, 1 9 SUBJECT T:aye 3. 'taintenance drnd,^n and fill in a '.)Oat onsin channel and repair of rip -ran seawall. TO ±11nry rt�,in� tr), 'Ii rPrtnr DEP'T Pl_anninR, Buil dine & ZOni'l, EnVi 7'OnP eat?_1. aFROM '?o!iert nennis 'ii 010�*ieC DEFT Planning Puildin^ 4 Zonins, LEr_AL T!FSP 63S, .,Er 3"E, SECT 5. Lot 5 (OR 473-697-6931). Plantation I:e�r. Zonin+! is P,U-1. ItdTROP.UCTTON This a-pl ication is to be reviewed 1)y the 'Ionr_oe, County Board of Commissioners in accordance with Charter 19-111(a)(5) of the 'tonroe Co+t-ity Code. 4 P,ISCUSSInN: Applicant is r.eq)_testin¢ approval to Maintenance dredge an existinry ',oat c'iannel 15 to 20 Ft_. taide to a depth of -5 ft. "L%T. The c'ianne_l begins in the annlicants' unlanc' and extends 310 ft. into the Atlantic Ocean. In addition, t'le applicant proposes to fill the la.ndt:+ard 30t ft. of the r_`iannel/boat slip (average widt'i 35 f_t).to an elevation of +3 ft. 'ISL (elevation of upland) and con:3truct a weed. 'gate across the entrance of t7.e boat slip. Also proposed is the repair of an exi stint! rin-rap seawall wit:l additional !)oulders. Approximately 557 cu>>ic yards of material will be excavated and placed o-i the applicants' upland property. A.t t;ie present time, t'iI.s area is ve!*etate;I with lat.rn crass. Filling of the unlar.,! portion of the e'iannel trill require about 366 c.y. of coral marl. T'aa upland end of t'.ie channel/boat slip 'ias acculTiulated Sn,l'?r.139 detritu, and (u"_ to itS decor.inositioTi emit, an unpleasant oder (!!,)S), o?)noxiousl^ noticable during lots tide. A clump of lar0a, red Tian -rove., 77as observed in t'ie nortaeast cor-ier of the siip. A sintlar clur+n o4 red Inancrovr-_s had been reprove i frol t z.e nort!v7e.:t cor-ier, prior to my April 23, insnectio-i (see r:I0to�ran'l s 1, 3 I-ILI !:). TIIe +tpland portion of t'ie canal ?Iottori inns fou_I'! to ')e unv,�^etated and tie sediment of a silty -ooze col;i tenc.7.Q;t>siop�i.asiop�i.1 (t;Ie "upside (I Own j01lyfisi1 t:�1S a cOrmOtl ')Ottnm i17:1'.)it t'lt in the canal. TOPS FORM 3397 LITHO IN DEPARTMENTAL CORRESPONDENCE DATE :Line 17, 1931 SUBJECT'r.aye, R. , "antenance dre!I^e and fill in a boat basin channel and repair of rip -rap seawall. To Faze tWo DEP'T FROM DEP'T Be"inninv at the shoreline and extending offshore to C;it:lin 30-50 ft. of the one, of the channel, the bottom was heavily v2cetated with Thalassia(turtlegrass). EVAL"ATIOINT : Accordin to the attacher? 7E'_: r-epQrt, apFroxinately 200 squar(a feet o.` red mangroves and 30,10`1" square feet of sea.t-rass and algae will be removed as a resnit of the dredge and fill activities associated wit'i this *project. The loss of the r a d man -roves will be compensated For oy th; plantin^ of 150 square feet of red man^rove seedinns as requested by the Army Corps and ,)1 . . The loss of the sea-rass is of greater concern. However, the need to maintenance dredge was evident when the site was reinspected during low tide in late Mlay. Deptas were found to be less than 2 ft. at that tide. The proposed Weed gate should help to reduce the amount of seagrasses antering and accumulating in the upland portion of the canal, but care must be taken to keep the gate operating properly and cleared of detritus. No environmental problems are expected from the repair of t:ie rip -ran seawall. i1EC071'1EV7::TI0: _ ) / j r- Approval with the stipulation that: 1. Tur'-)idity screens be used durin, all dredge and fill activitie3, 2. Th^ *,�i Itii and depth of the channel be minimized (no greater than -5 ft. 'IL4?, or Wider t'ian necessary to accomodate the boat) to nraserve and protect the seagrasses to tale maximun extent possible. op G•- Ar RC BERT{{S AND EGAN, P.A. of tQ og" g. g. is. JIRa.. Monroe County Planning, Building and Zoning Department Public Service Building, Wing II Stock Island Key West, Florida 33040 Dear Sirs: 2177 SwA &.,,,A c7 ed c�- Duet OMcce�9" 1386 J aa�iaaeee, J �onida 32302 904 224-5469 April 15, 1981 RE: DER File #44-39186-5E, Application by Mr. Bruce Kaye On February 18, 1981 we filed an application with your Department on behalf of Mr. Kaye for certain dredging and filling activities. Enclosed is the biological report prepared by the State Department of Environmental Regulation. It is hoped that this will complete our application and that this matter can be scheduled for consideration by the Board of County Commissioners. Please let us know if additional information is desired. Sincerely, ROBERTS & EGAN, P.A. i Will a J. Roberts WJR/rrh Enclosure CC: Mr. Bruce Kaye DEPARTMENT OF ENTVIR.ONMENTAL REGULATION PER04IT APPLICATION APPJU TSAL File No.: 44-3913675E County: Monroe Date:4/3/81 Applicant Name: Bruce Kaye . -._--ess: 4430 Prairie Avenue, Miami Beach FL 33140 Agent (if applicable): Roberts & Egan, P.A. Address: 217 South Adams Street, Tal-lahassee, FL 32302 Location of project: Section(s) 3 _ Township 633' Range 38E Section(s) Township Range Local Reference: Oceanside Plantation Key; off SR 905, behind High SEPool. t°Vater Body: Boat basin w/access channel to Hawk Channel and Atlantic Ocean. ;3tar Classification of Project Area: III Adjacent Waters: III Aquatic Preserve: None Outstanding Florida Waters: None On site inspection, by: Eric R. Loken Date of Inspection: 2-26-81 Original Application: Yes No K Revised Application: Yes Y No_ Date: Date of 2nd Insp. 3/5/31 Bi.oic,4ical and Water 7• 14-Ir Assessment A. Description of proposed project and construction techniques. Quantify area of project which extends into waters of the state (including the submerged lands of those waters and the transi- tional zone of the submerged land) as defined in Section. 17-4.02 a^�? Section 17-4.28, Florida Administrative Code. Biophysical features of -general area. Include comments concerning extent of development_ of adjoin::; - rCrtias as well as relevant historical facts about the area. Biophysical features of specific project site and spoil site if applicable. Include identification of bottom types and any relevant historical `_acts about the area of the project. Potential impact of project cn biological"resources and water quality. address _long-term im_aact as well as immediate imoac" for all aspects of the project. _. Suggestions, where appropriate, for modifications that may reduce or minimize the potential imcpact of project. =R^" 16-10 (Rev. 6/79) AS if . l' KAYE , BRUCE 4.'i4-39186-5E ' onroe County - Plantar ion Key P` e Two 1he applicant proposes the rl,iintenanc(_, of his boat basin yin,11 access channel facilities a,:d idjacent shoreline. kl:aintunance activities proposed include dredginli=, silt .ind debris tro,:i said basin and channel areas, filling the e,:tr,,ine landward portion of the basin area, r­)airing an existing riprap revetment and in- stall4rig a floating weeu control gate. The proposed 'maintenance dredging work will entail the removal of 560+ cu. yds, of va sous -materials from the existing b.-isin and channel areas. This won will be performed by a small , barge-mount(.,<l, pump dredge which will deposit the sr)-)il materir,' into a Sox 90x 1.25 ft. dii:ed disposal area located on the appl... �.,t' a(ijacent upland nro- perty. The proposed fillip:-. .:ctivity vjill. entail the depcsi_- r tion of 270+ cu. vds , of clean rock £ill :riaterial in the Lin !- wardmost 30+ ft. (26 ft, avera ;e width) ()F the boat basin �.icility to a height equal to the c::i s~ ing upl,ic)d elev ation (ie, +3' ft., !-ILSL). The waterv,ard interf:-,�t. of the proposed filled area will approximate a 1:1 slope. The proposed rii_ ap revetment rena .rs will be effected by the "ca_-eful positioning" of an unspec'Ll ir_•d amount of unspecified size boulder ri.t)r,ip materials aloe-, a ic)C+ ft. section of the applicant's southern property shoreline between the +2.45 and -1. 15 ft. elev,-pions (I I.! . The proposed weed cantrnl device will be constructed of a series of interconn�..rota panels ul 2x 2 inch mesh net which will :)e suspended across; rl!„ ;,addle of the basin area on flexible lint and supported with floats between the water surface and -2.0 ft. elevations, The applicant also states that precautions will be taken to avoid appreciable temporary degradation" of state waters during all construction activities. All of these proposed activities are offered in the interest of pr,)tectin;; the applicant's boating - related facilities against detritus/si.1 t accumulation, shoreline attrition and hazardous navi;�,,ation. F. The applicant's property consists of a long; (450+ ft.), narrow (110+ ft.), rectangular, residential tract of land situated near Tavernier on the Atlantic Ocean shoreline of Plantation Key. it is bordered on both sides (,1��:th and south boundaries) by similar, private , residential trac`s o land :inc! on the west by State Roar: 4A road.,:,vi right -of -,.,?ay. :lie pronert',' s, upland areas vary botw-,2�., thoSe which have been variously cleare.i for hn� c develonmC;,t and accessories (ie, driveway, V,?:-i{spac_e, 11 andscaping) and those 1)etwoen the existini; house ,in: S.R. 4A ,•:hi_ch ai)pear to be in rl:Mural, prlsLine condition. The l:itver areas c-)ntain :1(,r.i Cal of the Florida Ke': s �-::i'Iflaock e.-i,.,; r()I1ment such as west Inc! 1C S 1nah),,;allV (C'.viC't('^.t.i rlaho-,'-1�.T1 Jl;mbc) limbo ((�l1rSC'.ra Sl�larllb3) l o-sonwool", (.ltt0 )lll!11 tc�:{ll.t': U:?l� , j��e'.vood(.JaC•^111111.1 .eVV-Cn.,l `' J ar,I If v -� 1-1_— -, f T-- '..':1..�.'ar11%irind ,S1 C�m,"i .a�ltila]ga:i) �iCV�`1c)pe(1 t.ln allU Clre:]^ -T--- T -- -- - --- surl`(. ending the <i��Ticant s reuse contain Vistralian pine KAYE, BRUCE ;"=4'-39186-5E Monroe County - Plantation Key Page Three (C�-surina eauisetifolia) , coconut palm:, a variety of tropical exotics an , at t:ie rear of the house a large (1C(i x 100 ft.), open la%- area . Predominant upland substrate is a shallo-,; laver of soil (in natural areas) and limerocl- fill material (in de- veloped areas) over limerock i,edrock. The only transitional - type vege_tation observed on the property consisted of: patches -of sea purslane (Sesuvium sp,) , daisy (Burr. ichita spp.) , bl it-o (Suaed3 lizearis) and seashore saltg,rass 1)iSLicilus snic,ita) growing, a ong t e edges of be h the basin ancFnatural shoreline property areas. ThL� applicant'- nrcrerty is bordered to thr- east by the basin access chaniiei i,! acent shallow -Taster submerged lands all contiqu,:�us with 11:1wk Channel and Cl,iss III' (Section 17-3.081: F.A.(,.) Arlantic Ocean waters. C. Althou4h the proposed spoil disposal area is situated on ad a - cent uplands property (see photo), the majority of this project is located around the applicant's existing boat basin with access channel and natural shoreline areas. The existing basin is presently bordered by a concrete dock with Tiki area (south), a boat launching ramp (southeast) and riprap revetment (remainder; except for 10 ft. long concrete seawall bulkhead at basin's ey-l-reme landward terminus (west)) . Among; and below the riprap revetment bordering the sides of said basin are red mangroves (Rhizophora mangle) interspersed with patches of the transitional flora cited above. The lamest and most significant mangrove growth exists along the sides of the extreme landward portion of the basin area (ie, within the proposed fill area). All of the existing riprap revetment on the property is variously -sized (1 in. to 1 ft. diameter) and in varying conditions of disrepair (ie, gappy ani': s ,_);,t -se in area - . The natural ,-roperty shoreline area is presently gradually -,.op,.;.. L I slope). Submerged project areas we:e inspected by the author o,: February 26, 1931 at a period of mean water. Suhmorgent basin areas vary from landward to shoreward ter,,%in::s areas. Extreme landward submerged basin areas have experionced ;3 substantial aniount� of detrital,'silt ,.a —ulation and, as a resin , water depths in this area were extrer::ely shallow (ie, 1-2 MSL). Probing Measurements inli- cared the silt laver in th::; ,area of the basin varied 1,etween 1 1:id 3 ft. , in the lateral III,! '-,sin areas, respectively. :h•., only vegetation in thi,; !rea (Of_hCt- than, the mangroves -;.(-ntioned above) consisted o`. filamentous Breen algaes. Ce::tr l basin areas (ie, adjacenc cock an,.1 i:imp) exhibited t1:c c:,rear-es'.. hasin depth 0-7 : t. `:c:,) , least-imoun4. of sill/debris accu:-:u- lation (6 inches thick) an,; the le.,st amount of submer�;i,nt vcre- tat:ion (isolated, small p:ltc!-.cs of �-seen algae on available " } %YE , BRUCE ­44-31)186-5E :`.c�nrcc Co::nty - Plantation Key Pa ;e Four substrate and at basin edges) . Mobile imrint- farina observed ir. this area inclu ed glass minnows (Anch(1a !;pp.) , several unidOt:- tified species of juvenile fish anal tar ,, population of Cassiopeia spp. anemone. At the basi^ mouth, the water depth shoaTs up to -4 ft. (MSL) ant-3 benthic vegtti t:ation increases to include a substantial growth of both green and brown al,,nes. -The basin access channel proceeds 3001 ft. from the mouth of the .basin to an existing 25 ft. wide x -8 ft. deep channel running approximately parallel to the applicant's shoreline and providing ocean access for the applicant's northern neighbor. The majority of the access channel measured -3.5 to - 5 ft. deup (MISL) at t}ie time of rne<isurement. Water depth at the channel's waterward terminus (ie, 1as-_ 50 ft. prier to inter-;(,ction with other afore- mentioned channel) measured -5 to -3 ft-. ("`,SL). The access channel width varied between 10 and 15 ft..Channel substra'_-e consisted of a 1 to 2 ft. thick silt/sod']-,vent layer over a bedrock substrate. The channel biol.)gv variec} over the length of the channel, presumably in accordance with depth and resultant w,:Je action. Approximately 20-30 ft. waterward of the basin mouth (ie, bevond the algae area mentioned above) patches of shoal grass (ialodule wriFhtii) and turtlegrass (Thallassia testudinum) begin:. This shoal grass vegetation gradually increases to a unitorm channel bottom coverage and continues to 50-75 ft. from the ',asin mouth. Waterward of this are.3, shoal grass vegetation diminishes and turtlegrass vegetation increases to a lush, conn,,plete channel bottom coverage at the 100+ ft. cont0i1r. This lush turtles,_rass vegetation continues thereafter to the channel's waterward terminus mentioned above. The channel to -ninus area (i.e, last 30- 50 ft.) is presently the onl�' tmvegetated channel area exhibiting a predominantly open, sandy bottom. Both among the seagrasses and ir. isolated, open, sandy spots Cassiopeia spp. anemones, sponges, r, j� een and brown algaes and hard corals (Sidelstrea spp.) were observe' through,,ut the entire access ch: nnel. arei . Mobile marine 2auna onserved within the ch.-innel area Anchoa snp. riinnowt=. ,nojarra (Gereidao spp.) and several unidentified specie_ of j�h,enile T sh. Adjacenr submert,c•d lands appeared to he in n:itural, pristine con - .}"ion, )f excei-ent c}ualit,r -ind typical of Florida Keys rihallow- c:ater marine enviroluents. Water depth, vari(2d between -2 :,.( -3 t. (2-SSL) throaT;hour the access channel area. Predoriin::nt `�•hallassia spp. _,eagras ses art- rush in this Area and are i.nter- �:p�rse( with isolaated f? �',aes (Penicii l l__!, , 11A1;_ineda , .ltuhhu__! Padina, Acetahularia spp.), SO! anemC-Mes, spc)nFes, urchins -anal �arcl CUL-a1SClli�il SLl}):l.t'L- E'd Sllbotrar.t` COnSl_stGd of 3 t ,, Lhin (less than 1 ft.. thick) sediment layer, over be('.r;>c'::. ROBERTS AND EGAN, P.A. 2cr,Q 0 g. arrt Qee���,w,,ta �a,ns l9. �7�e�na Monroe County Planning, Building and Zoning Department Public Service Building, Wing II Stock Island Key West, Florida 33040 RE Dear Sirs: 24 77' &A Qd.ame 05U a c�- 7 net (Deice ! aL. 4 386 J a�a�weeee, ��"�nida 32302 (TIC go4 22k-54a February 18, 1981 DER File 444-39186-5E, Application by Mr. Bruce Kaye Enclosed is our application for county permit. We include a signed application form, copy of the application sketch and our check in the amount of $25.00 representing the application fee. Please let us know if additional information is desired. Sincerely, ROBERTS & EGAN, P.A. Robert A. Routa RAR/hh Enclosures fl ,%Y F. , P PI!J CF F44-3918e-5i, Monroe County --Plantation Key Page Five D. The primary adverse impact of the proposed filling activity will be in the impoundment and eventual destruction of the 200+ sq. ft. of mature (3-15 ft. high), healthy red mangrove growth presently existing along the edges of the proposed fill area. Beneficial. impacts are expected to result from the partial elimination of a presently stagnant, aesthetically unpleasant submergent area. The proposed maintenance dredging of the applicant's basin and access channel areas is exempt from Departmental permitting authority pursuant to Sectl`.or 17-4.04(d) of the Flo-cida Administrative Code. It is herein estimated that, if undertaken with proper water quality controls, said dredging activities will result in the destruction and ^F "1,000+_ sq. ft. of seagrasses and algaes presently growing on the channel bottom (in addition to an unspecified amount of various other b,enthic fauna). This vegetation provides a variety of benefits for the local marine ecosystem including increased productivity, water quality enhance- ment and fishery breeding and nursery habitat. ;or this reason, it is suggested that said dredging operations should proceed carefully and selectively in an effort to preserve the maximum amount of existin, channel vegetation. A reinspection of the channel area on March 2, 10,81, at a period of low water, indicatee a definite need for some tyne of channel maintenance; however, it is believed that, if carefully undertaken, such activities could avoid a substantial amount of the aforementioned seagrass destruction. It is expected that, if properly employed, the proposed weed gate will serve to assist in preventing future detrital accumulation within the landward portion of_'the boat basin area. However, due to its proposed location (io, central basin area), it is expected that this mechanisr�r also wil_1 C, ect a shift of this problem 40+ ft. waterward of its present location rather than alleviating the problem itself. Mr.ile this device, if functior:ing properly, can be expected �:o halt further detrital intrusion into the basin facility beyond t=s point of location, it will not prevent the accuIilulation a detrital material, in general. For this reason, it is herein shoo-,ested that this device be periodi- cally maintained after i_nstal.lation to prevent detrital accumu- lation in front of the c..evice. Such mainterance might consist of "skimming" detritus cau;,ht by the device w: th some type of nQr- prior to its sinking and creatin`; putrescent submergenr_ ae^osits. Since there is little present existing vegetation within the proposed riprap revetment maintenance area, it is expected that, i proper placement techniques are utilized, the impact of this portion of the project will }e minimal. KAYE, BRUCE `41-39186-5E llonroe County - Plantation Key Page Six finder the provisions of Chanters 253 and 403(F.S.) and Sections 17-3 and 17-4(F.A.C.), I hereby recommend this application. for Departmental approval provided the following suggestions .For project modification can be incorporated as permit conditions: 1.. Specification that 150 sq. ft. of red mangrove seedlings (2-3 ft. high) be planted along northeast basin perimeter in accordance with Mr. R. Routa's agreement with the U.S.A.C.O.E. as stipulated in his letter of :larch 19, 1981. In addition, it should be stipulated that said plantings shall not be considered complete until an 80 percent or greater survival rate has been demonstrated at least one year from the date of the planting,. r Specification that stringent: turbidity control devices be utilized during the proposed maintenance dredging aerations. This is of paramount concern considering; the excellent quality of adjacent submerged lands. In addition, all barge movement and/or rel.a'ed activities must be restricted to the immediate, existing channel area to avoid bottom -scouring of extremely shallow adjacent submerged Lands. If bargeiboat movement is required outside of said channel aria, it shall. be restricted to sm1ill boats (less than 20 ft.) and periods of high water. only. 3. Shift the location of the nrcposed weed control device to the mouth ��� the basin area (rather than its proposed central basin location). A flush or across -the -mouth orientation is suggested due to is potential additional advantage of shunting or bypassing a portion of said detrital materials rather than simply trapping and collec- ting; the same in a different place. The existing lack of surface relief for this purpose at the basin mouth area mi_-ht be overcome by the placement of some type of poles on either side of the basin mouth area. Moreover, it is suggested that the proposed device's netting material be colored or coated for maximum visibility prior to its installation. This will serve to assist fish in identifying the structure prior to be coming impinged within i_s meshes. 4. Specification that only larE;e diameter (2+ ft.) boulder riprap material L)e utilized in both the revetment repair and fill stabili- zation activities. This will serve to prevent riprap displacement:, control runoff and provide ad(:!itional littoral microhabitat. 1� �G��� EOR-L , E.,TV-. S?EC . II ll<tte : April 3, 1981 Read: GLEN BOE ER1,/ d%-o 01) S Z-7- 3201 GOLF COURSE BOULEVARD PUNTA GORDA, FLORIDA 33950 y O� E�1V�RONM�, Y �rE OF rtoa. . STATE OF FLORIDA DEPARTMENT OF ENVIRONMENTAL REGULATION SOUTH FLORIDA BRANCH OFFICE April 9, 1981 Bruce Kaye c/o` Roberts & Egan, P.A. 20 South Adams St. Tallahassee, Florida 32302 Monroe County, File No. 44-39186-5E, Maintenance Dredging, Fill Repair Rip - Rap Revetment, Floating Gate Dear Mr. Kaye: BOB GRAHAM GOVERNOR JACOB D. VARN SECRETARY As we advised you on February 10, 1981 , Your application is incomplete without local approval, pursuant to Section 253.124, Florida Statutes, for filling waterward of the existing mean/ ordinary high water line. Please submit the enclosed copy of our biological comments together with your permit application to the Board of County Commissioners/City Council or their authorized permitting authority. Section 253.124, Florida Statutes, states that the county commission/city council ". .shall have in hand the (biological) report and findings thereof." It further states, ""_'fie report shall be read into the record and duly considered at the same meeting at which the board of county commissioners oT other authorized body takes final action on the application ter permit." will need to obtain a copy of the minutes of the meeting in appropriate indication of the local approval. This �etter, resolution or copy of the minutes should be sent to office. Your application will remain incomplete without •a 4_d local approval. If you have any questions concerning =ns procedure, please contact as. vb sure Sincerely, 414wot*&. 4&A Pi --hard W. Cantrell, _+r 3d.ge & Fill Supervisor �c 1'-1.122 (50) KAYE, BRUCE #44-39186-5E Monroe County - Plantation Key Page Two . A. The applicant proposes the maintenance of his boat basin and access channel facilities and :adjacent shoreline. Maintenance activities proposed include dredging silt and debris from said basin anJ channel areas, filling the extreme landward portion of the basin area, rnnairing an existing riprap revetment and in- stalling a floating weed control gate. The proposed maintenance dredging work will entail the removal of 560+ cu. yds. of various materials from the existing basin and channel areas. This work will be performed by a small, barge -mounted, pump dredge which will deposit the spoil materials into a 90x 90x 1.25 ft. diked disposal area located on the applicant's adjacent upland pro- perty. The proposed filling activity will entail the deposi- tion of 270+ cu. ydso of clean rock fill material in the land- wardmost 30+ ft. (26 ft. average width) of the boat basin facility to a height equal to the existing upland elevation (ie, +3 ft.; MSL). The waterward interface of the proposed filled area will approximate a 1:1 slope. The proposed rih_ap revetment repairs will be effected by the "careful positioning" of an unspecified amount of unspecified size boulder riprap materials along a 100+ ft. section of the applicant's southern property shoreline between the +2.45 and -1.15 ft. elevations (MSL). The proposed weed control device will be constructed of a series of interconnected panels of 2x 2 inch mesh net which will :3e suspended across the middle of the basin area on flexible line and supported with floats between the water surface and -2.0 ft. elevations. The applicant also states that precautions will be taken to avoid "appreciable temporary degradation" of state waters during all construction activities. All of these proposed activities are offered in the interest of protecting the applicant's boating - related facilities against detritus/silt accumulation, shoreline attrition and hazardous navigation. B The applicant's property consists of a long (450+ ft.), narrow (110+ ft.), rectangular, residential tract of land situated near Tavernier on the Atlantic Ocean shoreline of Plantation Key. it is bordered on both sides (north and south boundaries) by similar, private, residential tracts of land and on the west by State Road 4A roadway right-of-way. The property's upland areas vary between ~hose which have been variously cleared for home development and accessories (ie, driveway, yardspace, landscaping) and those between the existing house and S.R. 4A which appear to be in natural, pristine condition. The latter areas contain flora tvpical of the Florida Keys hammock environment such as West Indies mahogany (Soviet_ e_ n a mahogany), gumbo limbo (Bursera simaruba), F,oi sonwood-7 to ium [o__x_1erum) , j oewood ' (Jac uin a TeFc ye�_i ) and wi ld,k amarind vs i oma�L ilia) . Developed up ancareas sur?ounding the apicant s house contain Australian pine KAYE, BRUCE #4'-39186-5E Monroe County - Plantation Key Page Three (Casurina eauisetifolia), coconut palm, a variety of tropical exotT an , at tiie rear of the house a large (100 x 100 ft.). open lawn area. Predominant upland substrate is a shallow layer of soil (in natural areas) and limerock fill material (in de- veloped areas) over limerock bedrock. The only transitional - type vegetation observed on the property consisted of patches of sea purslane (Sesuvium spp.), daisy (Borrichia spp.), blite .(Suaeda linearis) and seashore saltgrass (Disticfilus 'shoreline growing along t e edges of both the basin an natural shoreline property areas. The applicant'- property is bordered to the east by the basin access channel acid adjacent shallow -water submerged lands all conti uous with Hawk Channel and Class III (Section 17-3.081; F.A.G. with Ocean waters. C. Although the proposed spoil disposal area is situated on adja- cent uplands property (see photo), the majority of this project is located around the applicant's existing boat basin with access channel and natural shoreline areas. The existing basin is presently bordered by a concrete dock with Tiki area (south), a boat launching ramp (southeast) and riprap revetment (remainder; except for 10 ft. long concrete seawall bulkhead at basin's extreme landward terminus (west)). Among and below the riprap revetment bordering the sides of said basin are red mangroves (R_hi�zophora mangle) interspersed with patches of the transitional 47 of ra cited above. The largest and most significant mangrove growth exists along the sides of the extreme landward portion of the basin area (ie, within the proposed fill area). All of the existing riprap revetment on the property is variously -sized (1 in. to 1 ft. diameter) and in varying conditions of disrepair (ie, gappy and sparse in areas). The natural property shoreline area is presently gradually sloped (1:8 slope). Submerged project areas were inspected by the author on February 26, 19001 at a period of mean water. Submergent basin areas vary from landward to shoreward terminus areas. Extreme landward submerged basin areas have experienced a substantial amount of detrital/silt accumulation and, as a result, water depths in this area were extremely shallow (ie, 1-2 ft; MSL). Probing measurements indi- cated the silt laver in this area of the basin varied between 1 and 3 ft., in the lateral and central basin areas, respectively. The only vegetation in this area (other than the mangroves mentioned above) consisted of filamentous green algaes. Central basin areas (ie, adjacent to dock and ramp) exhibited the greatest basin depth (5-7 £t., 1,11SL), least amount.of silt/debris accumu- lation (6 inches thick) and the least amount of submergent vege- tation (isolated, small patches of green algae on available KAYE, BRUCE #44-39186-5E Monroe County - Plantation Key Page Four substrate and at basin edges). Mobile marine fauna observed in this area included glass minnows (Anchoa spp.), several uniden- tified species of juvenile fish an a argo population of Cassiopeia spp. anemone. At the basin mouth, the water depth shoa s up to -4 ft. (MSL) and benthic vegetation increasesto include a substantial growth of both green and brown algaes. The basin access channel proceeds 300+ ft. from the mouth of the basin to an existing 25 ft. wide-x -8 ft. deep channel running approximately parallel to the applicant's shoreline and providing ocean access for the applicant's northern -neighbor. The majority of the access channel measured -3.5 to - 5 ft. deep (MSL) at the time of measurement. Water depth at the channel's waterward terminuE (ie, last 50 ft. prior to intersection with other afore- mentioned channel) measured -5 to -8 ft., (MSL). The access channel width varied between 10 and 15'ft,.Channel substrate consisted of a 1 to 2 ft. thick silt/sediment layer over a bedrock substrate. The channel biology varied over the length of the channel, presumably in accordance with depth and resultant wave action. Approximately 20-30 ft. waterward of the basin mouth (ie, beyond the algae area mentioned above) patches of shoal grass (Halodule wrightii) and turtlegrass (Thallassia testudinum) begin. This shoal grass vegetation gradually increases to a uniform channel bottom coverage and continues to 50-75 ft. from the basin mouth. Waterward of this area, shoal grass vegetation diminishes and turtlegrass vegetation increases to a lush, complete channel bottom coverage at the 100+ ft. contour. This lush turtlegrass vegetation continues thereafter to the channel's waterward terminus mentioned above. The channel terminus area (ie, last 30- 50 ft.) is presently the only unvegetated channel area exhibiting a predominantly open, sandy bottom. Both among the seagrasses and in isolated, open, sandy spots Cassio eia spp. anemones, sponges, t;ieen and brown algaes and hard corals Siderastrea spp.) were ^hserved throughout the entire access channel area. Mobile marine fauna observed within the channel area included Anchoa spp. minnows, [DOjarra (Gereidae spp.) and several unidentified species of Juvenile fish. Adjacent submerged lands appeared to be in natural, pristine con- dition, of excellent quality and typical of Florida Keys shallow - water marine enviroments. Water depth, varied between -2 and -3 £t. (MSL) throughout the access channel area. Predominant Thallassia spp. seagrasses are lush in this area and are inter- spersed with isolated algaes (Penicillus,,Halimeda, Bato hora, Padi_na, Acetabularia spp.), sea anemones, sponges, urchins and �arecora- Natural submerged substrate consisted of a firm, thin (less than 1 ft. thick) sediment layer over bedrock. KAYE, BRUCE #44-39186-5E Monroe County - Plantation Key Page Five D. The primary adverse impact of the proposed filling activity will be in the impoundment and eventual destruction of the 200+ sq. ft. of mature (3-15 ft. high), healthy red mangrove growth presently existing along the edges of the proposed fill area. Beneficial impacts are expected to result from the partial elimination of a presently stagnant, aesthetically unpleasant submergent area. The proposed maintenance dredging of the applicant's basin and access channel areas is exempt from Departmental permitting authority pursuant to Section 17-4.04(d) of the Florida Administrative Code. It is herein estimated that, if undertaken with proper water quality controls, said dredging activities will result in the destruction and loss of 3,000+ sq. ft. of seagrasses and algaes presently growing on the channel bottom (in addition to an unspecified amount of various other beAthic fauna). This vegetation provides a variety of benefits for the local marine ecosystem including increased productivity, water quality enhance- ment and fishery breeding and nursery habitat. For this reason, it is suggested that said dredging operations should proceed carefully and selectively in an effort to preserve the maximum amount of existing channel vegetation. A reinspection of the channel area on March 2, 1981, at a period of low water, indicates' a definite need for some type of channel maintenance; however, it is believed that, if carefully undertaken, such activities could avoid a substantial amount of the aforementioned seagrass destruction. It is expected that, if properly employed, the proposed weed gate will serve to assist in preventing future detrital accumulation within the landward portion of the boat basin area. However, due to its proposed location (ie, central basin area), it is expected that this mechanism also will merely effect a shift of this problem 40+ ft. a to -war, of its present location rather than alleviating the problem itself. While this device, if functioning properly, can be expected to halt further detrital intrusion into the basin facility beyond its point of location, it will not prevent the accumulation a detrital material, in general. For this reason, it is herein suggested that this device be periodi- cally maintained after installation to prevent detrital accumu- lation in front of the device. Such maintenance might consist of- "skimming" detritus caught by the device with some type of ,ic prior to its sinking and creating putrescent submergent deposits. :,ince there is little present existing vegetation within the vr_oposed riprap revetment maintenance area, it is expected that, ;. proper placement techniques are utilized, the impact of this nOrtion of the project will be minimal.