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1992-319 CZM Section II (7.11) 7.11 CAXAKBAS PASS 7.11.1 SIGNIFICANCE TO NATURAL SYSTEMS 7.11.1.1 Introduction Caxambas Pass is bound by Marco Island to the north, and Kice Island to the south (Figure 7.11-1). It drains several shallow natural waterbodies including Caxambas Bay, Barfield Bay, Grassy Bay, Little Grassy Bay, Blue Hill Creek, and Blue Hill Bay. It also drains the man-made residential canals of Marco Island, and the altered waterbodies of Roberts Bay and Smokehouse Creek. The pass itself is not marked, although it is a commonly used navigation channel. Several markers exist to the east, in Caxambas Bay, to mark shoal areas. The waters of the southern half of the pass, and all waters of its drainage basin outside of Marco Island, are within the Rookery Bay Aquatic Preserve boundaries, and are designated as Class II, and as outstanding Florida Waters of the State. The pass and inland waters in this area are heavily used by West Indian manatees for feeding and resting activities. For this reason, as well as for boater safety purposes, Roberts Bay, Smokehouse Creek, and the canals of Marco Island, have been designated as idle speed zones. The northern half of Caxambas Bay from Red Marker "4", east and north to the northeast corner of David Key, has also been designated as an idle speed zone. Markers designating this area as such will be installed in the near future. 7.11.1.2 BioDhvsical Features Caxambas Pass is partially stabilized along its northern shoreline by hard, man-made structures such as vertical seawalls and riprap revetments. Its southern boundary is left in its natural state, and consists of several shoals and undeveloped mangrove islands. The entrance to the pass contains an extensive ebb tidal delta which is subject to continual change. The extreme southwestern tip of Marco Island is the site of the Point Marco PUD. It was previously used by the U.S. Government as a missile tracking station in the 1950's and 1960's. In 1952, an approximately 2,200' seawall was constructed about 50' landward of the MEW line. This structure sped up erosional processes along the shoreline of Caxambas Pass. Prior to the installation of the seawall, the shoreline was relatively stable due to seasonal wave patterns. In the summer months, the dominant wave direction was II -418- from the southwest, causing a northerly movement of sand from Kice Island and the ebb tidal shoals at the mouth of the pass to the mainland beach. In the winter, sand was eroded from the Marco beaches to the inlet shoals and Kice Island by wave action from the northwest (Harvey et al., 1984). After construction of the seawall, waves would reach the wall during storm events, speeding up erosional processes. The strong tidal currents of Caxambas Pass then continued to scour sand from the toe of the seawall, resulting in potential failure and collapse of the wall. Erosion of the beach to the north of the seawall was also accelerated due to the presence of this structure (Larsen, 1981). The historic, well-developed ebb tidal delta shifted in response to changing geomorphological conditions caused by the seawall structure. The shift was to the south, between 1952 and 1962, fed by the eroding beach from south Marco Island. Between 1962 and 1969, the connection of the ebb tidal delta to south Marco Island was breached, facilitating further southeastward migration of the delta toward Kice Island. Between 1951 and 1981, over 400' of erosion occurred on south Marco Island (Figure 7.11-2). In 1979, the Deltona Corporation, which then owned the property, installed a riprap revetment waterward of the seawall to prevent collapse of the structure. In 1980, the property was sold by Deltona to Antaramian Development corporation, and became the site for the approximately 30 acre Point Marco PUD. The PUD includes a residential apartment complex, docking and recreational facilities, restaurants, and other support facilities. It is presently under construction. stipulations in Ordinance 90-42, amending Ordinance 81-25: Point Marco Planned unit Development, include sea turtle and beach/dune protection measures. Dock facilities are limited to boats 30' in length, and are not permitted for overnight use, or for fuel sales. A 20' segment of shoreline at the north end of the property has been dedicated for public beach access. There will be no structures waterward of the 1974 Coastal Setback line except for shade structures and beach walkovers pursuant to approval by Collier County and the FDNR. Because of the severe erosion that has taken place waterward of the seawall compound and along the beach to the north, Collier County applied for State and federal beach nourishment permits. The beach nourishment project is combined with two other projects along the Marco Island shoreline (see "Section 7.10: Big Marco Pass". The area to be nourished is located 580' north of DNR reference monument R-143 to 880' south of DNR reference monument R-148, and is 6,330' long. The post-nourished shoreline will be II -419- located up to 405' seaward of the present MHW line. The average dune width will be 70', with an elevation of 10', NGVD. Approximately 560,000 cubic yards of fill are proposed for the south beach. The borrow area for the fill is located just south of the south tip of Marco Island, in the ebb tidal delta for Caxambas Pass. This ebb tidal delta is within the Caxambas critical wildlife Area, as designated by the FGFWFC. "Emergent shoals in both Big Marco Pass and Caxambas Pass serve as important resting, feeding, and nesting areas for shorebirds...The Caxambas Pass Critical Wildlife Area is the major roosting shorebird site in the 10,000 Islands area, which has been rated as one of the top ten shorebird sites east of the Recky Mountains by the International Shorebird Survey...there is a clear potential for future environmental damage on a large scale from this project due to the length of the permit and the sensitive nature of the emergent shoal areas in both passes and the bay systems on the interior of the passes" (FDER, 1989b). The FDER permit specifies that construction will be limited to the period between October 1 and March 31 in any given year, to avoid disturbance to least tern populations on the emergent shoals, and to sea turtle nesting and hatching activities occurring on the beaches. To prevent disturbance of the over-wintering bird populations at both Big Marco and Caxambas Passes, which are within critical wildlife Areas, the dredge pipeline is to be routed around emergent shoals and all construction equipment is supposed to avoid emergent shoals. To confirm that removing sand from the borrow areas and the construction of breakwaters and terminal groins is not having an adverse affect on the emergent shoals within the CWAs, the dimensions and locations of the shoals are to be monitored on a yearly basis, with remedial action to be taken as necessary. Work is to be done by hydraulic dredge and pipeline to keep turbidity levels as low as possible, and daily turbidity monitoring reports during all renourishment activities are required. Future renourishment activities will not be approved if initial turbidity levels violate State standards. The borrow areas can be dredged no deeper than -18' NGVD, to avoid the creation of unnaturally deep pits. Manatee awareness conditions are included in the permits, with the permittee (Collier County Government) or the contractor being held responsible for any manatee harmed, harassed, or killed as a II -420- result of project activities. Permit conditions dealing with manatee protection include the installation and maintenance of at least one manatee sign within the project area, the cessation of all construction activities in open water upon a manatee sighting within 100 yards of the project area, and requiring the contractor to keep a log detailing manatee sightings, collisions, or injuries to manatees during the contract period. Sea turtle nests and false crawls were monitored daily from May 5 to August 31, 1990, as a requirement of the permit. Thirty-eight false crawls and 35 nests were found along the Marco Island shoreline during this period. The number of nests and false crawls in this area created prior to May 5 were not recorded. A total of 31 nests and 20 false crawls were found within the proposed renourishment areas, including 5 nests and 5 false crawls along the north beach, 2 nests and 6 false crawls along the central beach, and 24 nests and 9 false crawls along the south beach (Endangered Species Research Foundation, 1990). Two terminal groins and a breakwater system are proposed for the south end of the fill area. The terminal groins are presently in place. The seaward end of the southernmost terminal groin is up to 229' seaward of the present MHW line, and the seaward end of the more northern groin is located up to 109' seaward of MHW. The breakwater system will consist of three breakwaters of about equal dimensions, each approximately 10' wide at the crest to 74' wide at the base, by 462' long, oriented parallel to the shore. These structures are a cause of concern to FDNR permitting staff: "The groins have a potential for resulting in adverse impact to downdrift areas to the south if the fill project is not maintained...The breakwater construction has the potential of causing an adverse impact to Caxambas Pass and the downdrift beaches of Kice Island. The potential impact of the breakwaters is not fully understood. The staff is concerned with the possible lack of need and justification for the breakwater system. Therefore, construction of the breakwater system is to be delayed to adequately monitor the performance of the project and demonstrate the need for the breakwaters." (FDNR, 1990d). Kice Island is owned by the State of Florida, since it was deeded over by the Deltona Corporation as mitigation for the development of Marco Island in 1972. It is part of what is known as the 'Cape Romano Complex', a group of barrier beach units which also include Morgan and cape Romano Islands. This complex is the southern terminus of the Collier County coastal barrier system. Management for this complex is under the Federal Coastal Barrier Resources Act. II -421- Kice Island is approximately 2.4 miles long, with about 11% of the land mass dominated by native coastal strand grasses and shrubs, and 89% dominated by mangrove forest with grasses and succulent herbs as understory vegetation. Its shoreline has eroded steadily by approximately 400' since 1885 (Collier County Environmental Resources Management Department, 1989). Formation and erosion of sand bars in the vicinity of the shoreline is an ongoing, dynamic process. Recently, an approximately 4,000' sand bar joined the Kice Island beach to form a tombolo. Morgan Island also has a history of erosion and sand redistribution since 1885. The trend of erosion and landward migration along the northern half of the island resulted in a recession of approximately 150' since 1927. The shoreline of the southern half of Morgan Island fluctuated 300' landward and 200' seaward during cyclic formation and destruction of an accreting sand spit. Tidal passes periodically opened, migrated, and closed on Morgan Island throughout the past hundred years. Presently, Blind Pass and a tidal opening to Morgan Bay are open, but these are transient connections to the Gulf. Morgan Island is about 2.1 miles long with 40% of the land mass dominated by native coastal strand grasses and shrubs, and 60% dominated by coastal strand exotic species, notably Australian pine (Collier County Environmental Resources Management Department, 1989). The majority of the land mass of Cape Romano is owned by the state. The shoreline of the southern apex accreted seaward 700' from 1927 to 1952, then eroded 800' from 1952-1981. The shoreline is relatively stable farther to the northeast. cape Romano is approximately 2.3 miles long, with about 45% of the land mass dominated by native coastal strand grasses and shrubs, and 55% dominated by mangrove forest with an understory of grasses and succulent herbs (Collier County Environmental Resources Management Department, 1989). 7.11.1.3 Drainaqe Basin Characteristics The drainage basin of Caxambas Pass is bound by S.R. 92 to the north, and overlaps with the drainage area of Coon Key Pass to the east. Kice Island and Helen Key are effectively the southern limits of the drainage basin. These undeveloped islands open up to the south and east into Gullivan Bay. Land masses within the drainage basin include Marco Island south of S.R. 92, the western section of the Goodland area, Horrs Island, Helen Key, Kice Island, and several smaller islands such as Currys Island, Dickmans Island, Fred Key, Pass Key, David Key, Pig Key, Alpha Key, and Beta Key. II -422- Substantial submerged seagrass beds are found around the shoals in Caxambas Bay and Barfield Bay. Much of the seagrass beds show scarring caused by boat propellers. Besides direct damage to seagrasses, which are slow to recuperate, propeller scarring causes a disruption in sediment stability, further degrading the integrity of the habitat. Viable seagrass areas are essential habitat for many protected and commercially valuable species, including the West Indian manatee, pink shrimp, mullet, snook, and others (see "Section 5.7: Seagrass Meadows"). The major development area of the drainage basin is the southern end of Marco Island. Substantial dredging and filling of wetlands took place in the 1960's and 1970's as part of the Roberts Bay segment of the Deltona Corporation's development plan. John Stevens Creek and the northern Barfield Bay segment of the Marco Shores PUD are being constructed. Much of the fringing mangrove forest, which forms an approximately 200' wide zone along the shoreline of Bluehill Bay and tidal channels, is being preserved. There is virtually no other development within the drainage basin. However, Deltona does plan to develop Horrs Island as part of the Marco Shores PUD in the near future. The Goodland Marina, also an element in the Marco Shores PUD, is presently under construction (see "Section 7.10: Big Marco/Capri Pass Complex" for a more detailed discussion of the Deltona Settlement Agreement). West Barfield Bay, a preserve area, is dominated by a 100'-150' wide fringe of mangrove forest along the shoreline. This is subject to frequent tidal inundation of about 6" (U.S. Army Engineer District, Jacksonville, 1979). Horrs Island, a roughly "T" shaped island, lies southeast of Marco Island. It is characterized by a prominent steep ridge extending along much of its spine, with elevations of approximately 5'-30' above NGVD. The ridge is bound by a narrow transitional zone, usually about 20' wide. This zone is surrounded by mangroves with a few tidal creeks and swales. The approved Horrs Island/Barfield Bay project includes two sub-areas: the island itself, and the mainland portion, adjacent to S.R. 92 on the south side. The two areas will be connected by a bridge over Blue Hill Channel, which connects Barfield Bay and Blue Hill Bay. The project site encompasses approximately 850 acres, including all of the uplands and mangrove forests of Horrs Island, and along the northern shore of Barfield Bay south of S.R. 92. The construction of 300 multifamily units is proposed on its 213 acre tract. A large impact on the upland vegetation of Horrs Island and north Barfield Bay is expected. Thirty-two acres of park and 10.6 acres of historic area surrounding Captain Horr's old homestead will be preserved. Upland vegetation within these parks will be retained (SWFRPC, 1984b). The unique II -423- vegetative and archaeological value of this area caused it to be nominated for purchase under the CARL acquisition program. The major natural vegetative communities include tropical maritime hammock, tropical scrub, shell mound, and tidal mangrove swamp. Approximately 106 acres on Horrs Island is included in the "unique vegetation" category, according to the SWFRPC (1984b). The mangrove forests are in good condition, dominated by red mangroves, especially at the seaward side, with white and black mangroves in the interior, and buttonwoods occurring in the transition zones from wetlands to uplands. Uplands consist of sand ridges and shell mounds within mangrove swamps. The tropical maritime hammocks and shell mounds are predominantly vegetated by live oak, gumbo limbo, Jamaica dogwood, wild coffee, and cabbage palm. The canopy varies from approximately 20'-40'. The tropical scrub areas contain a mix of temperate scrub species and tropical hammock species. The plant assemblage is dominated by typical scrub species such as live oak, sand live oak, scrub oak, scrub bay, saw palmetto, and gopher apple, mixed with hammock species such as gumbo limbo, wild coffee, love vine, wild cotton, and wild lime. This seems to be a unique plant community found only on sand ridge islands of the southwestern-most areas of Florida. "The coastal sand ridges and their associated vegetation are unusual and limited to southwest Florida. The combination of shell mounds and scrub vegetation is also rare. Horrs Island is the best known example of this community, and is in excellent condition over most of the island. A similar type of community may occur on Cannon Island in the Rookery Bay Buffers CARL project proposal, but detailed site inspection and confirmation are necessary. Many elements of natural diversity in the project area are in the data base in the Florida Natural Areas Inventory" (FDNR, 1984). The scrub areas have a low dense canopy ranging from 10'-20', and support numerous epiphytes, including several orchid species (FDNR, 1984). The area supports several endangered, threatened, and rare species of plants, including the ghost orchid (polvrrhiza lindenii), banded wild pine (Tillandsia flexuosa), iguana hackberry (Celtis iquanaea), sand dune spurge (Chamaesvce cumulicola), Florida privet (Forestiera seqreqata), and lip fern (Cheilanthes microohvlla). Protected animal species such as tree snails (Liquus spp.) and gopher tortoises were also observed (SWFRPC, 1984b). II -424- 7.11.2 PAST AND CURRENT MAINTENANCE Caxambas Pass separates Marco Island from Kice Island. The inlet drains Caxambas Bay, Barfield Bay and numerous dredged canals. Caxambas Pass via Caxambas Bay is used as the main navigational route from the Gulf of Mexico to Gullivan Bay. Prior to 1958 Caxambas Pass was a relatively stable tide- dominated inlet. In 1958 the U.S. Army Corps of Engineers constructed a massive seawall complex, now called the "compound", on the southwest tip of Marco Island. The compound housed a U.S. Navy microwave communications relay station. In 1962 radar was added and the base was used as a tracking station following the Cuban Missile Crisis. The construction of this seawall severely altered the natural pass dynamics. The wave field at the south end of the island was amplified near the inlet causing spit formation, over-nourishment of the inlet interior and channel redistribution (stephen, 1981). The pass now exhibits a wave- dominated morphologic form (Harvey et al., 1984), which is characterized by shifting sand shoals in the outer pass. Caxambas Pass has never been dredged for navigational purposes. However, the shoal on the south side of the pass has been selected as a borrow area for the Marco Island Beach Restoration Project. This action should assist in the development of a workable navigation channel through Caxambas Pass. Plans also call for a terminal groin and several small submerged offshore breakwaters (Coastal Engineering Consultants, Inc., 1986). These structures are supposed to ease the wave action to this area and return the pass to its more natural state. Once the shoals in the pass have stabilized, the natural tidal pressure from Gullivan Bay should keep the channel open to navigation. 7.11.3 SIGNIFICANCE TO RECREATION AND DEVELOPMENT 7.11.3.1 Beaches and Other Recreational Facilities Caxambas Pass is located south of Marco Island and north of Kice Island. Kice Island is included in the Cape Romano Barrier Unit #8 (see section 3.8). The Unit consists of Kice Island, Morgan Island, and Cape Romano Island. Kice Island is owned by the TIITF, and the narrow beaches provide a recreational area for beach-going boaters. Most of the island consists of mangroves, and mosquitoes are common; therefore, the popularity of the Island is seasonal with the insects. Immediately north of Caxambas Pass is the site of a U.s. missile tracking station, which was built in 1958. Under the orders of President John F. Kennedy, the station was used for approximately II -425- 5 years to monitor rockets fired during the U. S. Air Force exercises over the Gulf of Mexico. Since that time, the tracking station has been a haven for fishermen. The solid concrete seawall, fringed with riprap of various sizes, is a prime sport fishing area. Recently the area has been closed to the public. The Point Marco beach access is located in phase 5 of the Point Marco PUD. The site runs from Collier Boulevard to the Gulf of Mexico and is located on the southwestern tip of Marco Island. The access is a 20' wide, 540' long parcel (.25 acres), and is composed almost entirely of cleared land. Improvements by the Collier County Parks and Recreation Department have included a fence, a lime rock path, a bike rack and several trash receptacles. There is no parking at the facility. A parking facility should be considered for future acquisition. There is currently a paved parking lot directly east of Collier Blvd., across the street from the access. There is no apparent use for the lot and there are no structures in the vicinity. This area could have potential for future acquisition and be utilized for the beach access parking. 7.11.3.2 Public Boat Ramos The Caxambas Park boat ramp is located in Caxambas Bay, on the southwestern peninsula of Marco Island at Caxambas Pass (Figure 7.10-10). The park is a well developed facility on a four acre parcel, with paved access and parking for 31 trailers and 30 cars. The paved ramp is 30 feet wide and provides 2 lanes for boat launching. picnic areas with benches and tables are provided under shelter or in open locations. other amenities include restrooms, two floating docks, a water system, a fish cleaning table and security lighting. A concessionaire is contracted by the county to provide fuel and a bait and tackle shop (Reynolds, smith and Hills, 1988). In May, 1990, the concessionaire proposed the construction of a fixed dock to be 50 feet long by 4 feet wide on land adjacent to an existing seawall. The dock is intended to accommodate Coast Guard Auxiliary boats and other vessels requiring temporary mooring. In addition to the fixed dock the concessionaire also plans to double the length of the two existing floating docks from 20 to 40 feet. The expansion would allow them to handle twice the number of boats and help relieve the overcrowding problem that now exists. The construction costs would be carried by the concessionaire (Marco River Marina) and become property of the county should the concession operator decide not to renew his contract when it expires in January, 1994. The plans are in the permitting stages at the State and local level. II -426- Recommendations for future park expansion should include additional parking and picnic facilities. There is currently one acre available for park expansion. The park hours provide for a 6:00 p.m. closing. This should be expanded to a dusk to dawn time schedule to accommodate the fishermen. Park hours should be posted on the boat docks. There are no boat ramps planned for this area in the near future. 7.11.3.3 Marinas There are no marinas in the Caxambas Pass area. Most of the property is single family, multifamily, commercial residential, or in preserve status. As with most of Collier County's passes, the inner Caxambas Pass region is a major fishing area, especially for small boaters. The rougher waters outside the pass generally restrict small craft to the inner shoal areas. The Caxambas Pass area has been designated as an idle speed zone for the purpose of regulating motor boat speed for the protection of our Collier County population of manatees (DNR Rule 16N-22.023) (Figure 7.9-4). Marinas should not be permitted in this environmentally sensitive area in the future. 7.11.3.4 Development and Land Use Caxambas is one of the oldest place names on the coast and probably in all of Collier County. It was first seen on a chart of the Florida coast in 1771 as "Caxambas Espanola", a place of wells and springs. The name is thought to have come from depressions in the sand which held surface water, making this a place for early explorers and traders on long ocean voyages to stop for drinking water. As with the remainder of Marco Island and the Ten Thousand Islands, the Calusa Indians inhabited the Caxambas Pass region (hereafter referred to as Caxambas) as evidenced in the many shell mounds they left behind. Records and early maps suggest that the Caxambas Pass area is where Ponce de Leon and and his explorers landed on the southwest Florida coast. The Spaniards did not make much of an imprint on this region during the nearly three centuries they inhabited the area. The occurrence of pottery, tools and trade goods proves that there was extensive trade with the Calusa Indians. Little was known about this locality until Florida became a State in 1821. From this time, there were reports of Spanish Indian fish farms and well cultivated plantations (1837). The Seminole wars brought an end to these civilizations. II -427- A few families occupied Caxambas around 1870, but left little impression on the area. The Barfields were the first family to make history in Caxambas. James Madison Barfield joined his brother here in 1892, along with the Ludlows who had a pineapple plantation and packaging plant by 1902. In 1904, Barfield opened a general store and the first post office. Themail ran by mule as far south as Chokoloskee and as far north as Ft. Myers (across the passes!). In 1908, the Barfields (James and his wife Tommie) enlarged their home to accommodate 20 guests (Heights Hotel) and opened a school in the kitchen. In 1904, the E.S. Burnham packing Plant became interested in the clam resources at Caxambas and was given 5 acres of land by the Barfields (who owned most of the settlement). The clam cannery provided economic stability for Caxambas village until its collapse in 1929. Tommie Barfield revived the cannery for a short period during the depression, until a disastrous hurricane in 1932 finally devastated the resource. The once diversified settlement was soon reduced to a clan of commercial fisherman. Mrs. Tommie Barfield became a prominent figure in the development of Caxambas when she single-handedly induced the Lee County Commissioners (after much lobbying and many trips to Ft. Myers)to authorize a road from Naples to Marco Island; and an automobile- carrying ferry and a road from Marco Village to Caxambas Village. The road was completed in 1912, although it was wet and underwater most of the year (there were 15 Fords on the island by 1918). By this time Tommie Barfield had many milestone accomplishments, including being the first Superintendent of Public Instruction in Collier County. She felt that Marco Island would one day be well developed, and while the land was still cheap and plentiful, she demanded that adequate school grounds be set aside. Tommie Barfield worked with Barron Collier, lobbying Tallahassee to take the necessary action that finally created Collier County (once part of Lee County). When Barron Collier purchased most of Marco Island (1922), he had dreams to transform Caxambas into a port, although he continued to allow the tenants of Caxambas to remain in the homes rent-free. At the time of his death, Collier's sons decided to move the entire fishing community to Goodland and develop Caxambas village. The Colliers agreed to let the people keep the houses if they purchased property in Goodland and assisted with the moving costs. The entire village was relocated to Goodland and the Caxambas village remained vacant, until the Deltona Corporation purchased most of Marco Island and developed the new community in the early 1960's (Tebeau, 1966). II -428- In 1958, the U.S. missile tracking station was constructed at Caxambas Pass. The remains of the station were recently removed, and the Point Marco Resort Complex PUD will now be located here. At the present time the PUD is still in the permitting stages, although it has been an approved PUD since 1981. The development is to be constructed in increments according to the PUD Master Plan. The plan allows for residential apartments (176 units) and hotel and apartment hotel units (725 units) constructed on a previously altered 30 acre site. The general public will continue to have access to the beach in addition to the site providing the 20 foot beach access easement. The PUD also includes a docking facility for temporary use by the resort guests and for periodic use by charter boats to serve the guests of the hotel. Shuttle boats will be provided to transport hotel guests to the Kice Island recreational beaches. Kice Island and the Cape Romano Complex Kice Island is contained within the Cape Romano Unit P-15 of the Federal Coastal Barrier Resources Act (CBRA) of 1982 (Public Law 97-348; 16 U.S.C. 3509). This unit includes the entire barrier unit complex of Kice Island, Morgan Island and Cape Romano Island and several unnamed mangrove keys (see "section 3.1"). The unit is nearly pristine, with the exception of a man-made canal which was dredged through Cape Romano Island and has since closed off on the Gulf side. Kice Island was acquired by the TIITF in 1972 as part of the Deltona Agreement (13,230 acres). This area is contained within the Cape Romano - Ten Thousand Islands Aquatic Preserve. The Preserve warrants the maximum protection allowable under the rules and guidelines of the Florida Aquatic Preserves Program (subsection 187-20.004(2) (a)2. FAC). Proposed projects within the preserve will be subject to a higher standard than will more developed urban preserves. The entire area encompasses 27,642 acres of sovereignty submerged lands and the boundaries include all tidal lands and islands, sandbars, shallow bays, submerged bottom and lands waterward of the MHW to which the state holds title (FDNR, 1988b). There are currently private holdings on Morgan Island and Cape Romano Islands. Fish-camp developments are usually permitted although there are currently 3 structures that do not fit this criterion. The entire area is currently on the CARL list for future acquisition. II -429- Horrs Island lKev Marco Island) Horrs Island is located southeast of Marco Island among the inner shoal areas of Caxambas Pass. The island contains a total of 546.6 acres and natural beach ridge elevations up to 35' above sea level. Horrs Island is rich in prehistoric and historic archaeological sites. To date, 25 sites have been located on the island. Archaeological surveys suggest that the island was inhabited as far back as 4000 B.P. (and possibly earlier), as evidenced in the perceramic shell middens. Fiber tempered pottery (eight sherds) were collected from the surface of a small shell mound that radio carbon dated as far back as 3050 BP (Widmer, 1988). The one-half mile by one-quarter mile site is one of the largest archaic sites in South Florida (Hart, 1989). During this period of lower sea level a series of overlavina escarnments aives indication as to the-ecological, geologic~l and sociological events that have taken place on the island. It is evidenced that the Calusa Indians were the next inhabitants of Horrs Island, and were well established on the island by 800 A.D. The Indians were still living here at the time the Spanish explorers first landed on the island in the early 1500's. Disease transmitted by these explorers contributed to the extirpation of the native Indian populations. The Calusa left the remains of approximately 15 shell mounds which were uncovered by M.W. Sterling of the smithsonian Institution in 1930, along with 250 skeletons and a collection of Spanish colonial artifacts from the early 1500's. Historical descriptions between this time and the late 1800's are vague (Widmer, 1988). In 1870, Captain John T. Horr built a winter vacation home on the island, which became his namesake. By 1977, Horr had developed a diversified commercial food crop for trade in Key West. His plantation consisted mostly of pineapples; however, he also cultivated many varieties of citrus and mangos. Captain Horr lived in a small tabby building surrounded by frame construction (remains of his house can still be seen today). Decline in the pineapple trade in the 1920's along with the boom in Florida land sales caused the closing of the packing plant and the eventual sale of the island. The island was abandoned until it became the winter home of another family (the Patricks) in 1940. They spent many winters on the island and made little changes with the exception of a small house and yard. II -430- In the early 1960's the property was acquired by the Deltona corporation. As part of the Deltona Agreement the island was permitted for development in 1982 in exchange for 13,230 acres of environmentally sensitive lands. In 1988, the Ronto Group purchased Horrs Island from Deltona and the island is now planned for an exclusive community. The new owners of Horrs Island are in the process of changing the name to Key Marco Island. The planned community will contain a minimum of 80 homesites and not more than 134 homesites, a gate house, and a dock master house. Homesites will comprise a total of 142.74 acres. Portions of the property, referred to as Recreation/Native Habitat (and Park/Open Space Areas), will be used for recreational and social purposes. These areas also include tennis courts, pools, bicycle paths, walkways, vita paths and other recreational walks and roadways. The Recreation/Native Habitat and Park/Open Space Areas are sUbject to strict conservation easements. provisions for an Environmental Committee have been established (requirements of the Settlement Agreement, the PUD and the DO) in order to preserve, monitor and manage the archaeological and environmental resources of the property, and to advise on environmental and archaeological matters. Archaeological easements over homesites and the Common Areas for ingress, egress, and preservation, excavation and study of archaeological areas are included in the PUD. Owners of homesites which contain archaeological easements or setbacks will not be able to interfere, construct, plant or otherwise disturb the area. The University of Florida Foundation, Inc. will have the right to enforce these provisions. The contents of any area in an archaeological easement will be owned by the Homeowners Association for the benefit of the University of Florida Foundation, Inc. (Ronto Development PUD, 1990). within the next 2 years Ronto development plans to build a $3,000,000 bridge to connect Horrs Island to Marco Island. The guard house, gatemaster house, community center, sports complex, dock masters house, and four fishing piers with gazebos are next to be developed. The island is also approved for 200 various sized boat slips and will be able to reduce the number of slips in exchange for larger slips (minimum 138 dock slips). II -431- 7.11.4 RECOMMENDATIONS 7.11.4.1 Maintenance Recommendations Caxambas Pass should be maintained at its current level of service. Dredging for navigational purposes is not deemed to be necessary as depths are adequately maintained by tidal currents. For beach renourishment projects, dredging should be restricted to submerged ebb tidal delta shoals that have been approved for this purpose by state, County, and federal agencies. The dredged material should only be used for renourishment of beaches in the immediate vicinity, i.e., the downdrift beaches of Marco Island. Emergent longshore sandbars should not be used as borrow areas because of their value in providing shore protection and shorebird habitat. Projects that would have a negative impact on sea turtle nesting and/or hatching activities should occur outside of sea turtle nesting season. Nest relocation activities to accommodate construction during sea turtle nesting and hatching season should not be permitted in any case unless there would otherwise be an extreme impact on human health, safety, and welfare. The tombolo accreting on Kice Island should not be dredged or used as a borrow area for sand. Newly accreting beaches and sandbars form important shorebird habitats and afford protection to landward shorelines. Small projects, such as single family docks, other over-water structures, and shoreline armoring, should be done in the most environmentally sound manner. Docks should be aligned to avoid submerged seagrass beds or other benthic habitat, and terminal ends should be in appropriate water depths to reduce prop dredging (deeper than -3', MLW). Shoreline armoring should not be allowed unless erosional threats to property are severe. If that is the case, armoring should consist of revetments of sloping riprap with vegetation planted at the toe. Natural shoreline vegetation should be preserved to maintain shoreline stability, habitat, and filtering capabilities. Native, salt-tolerant vegetation should not be removed from dune areas. Only limited clearing, with an emphasis on construction of dune walkover structures and preservation of dune vegetation, should be permitted. II -432- 7.11.4.2 Recommended Restoration Activities Educational signage within the backbay system and at recreational beaches, as well as the sponsoring of educational programs, addressing shoreline dynamics, protected species protection, littering, prop dredging, the value of seagrass beds and native dune vegetation, and other appropriate topics are encouraged. These projects should be approved by the County's Natural Resources Department. Sea turtle monitoring programs should continue on Marco Island beaches. However, nest relocation practices should be discouraged, unless the nest would be destroyed in its existing location. Instead, appropriate timing of construction activities that disturb sea turtle nesting and/or hatching activities should only take place outside of sea turtle nesting season. Sea turtle monitoring programs should be initiated for the beaches of Kice, Morgan, and cape Romano Islands, as well, to increase the data base for sea turtle nesting and hatching activities within the county. Dune systems should be vegetated with native, salt-tolerant plants to enhance shoreline stability. Appropriate species include sea oats, salt grass, sea grape, railroad vine, etc. Exotic nuisance vegetation, such as Australian pine and Brazilian pepper, should be removed from dune systems, where possible. Back bay areas infested with exotic vegetation could also be selectively cleared, and replanted with appropriate native species. II -433- ~i 'j )- = It ~ 2 i ro t ;; ;; " " . ;; = ;; 0 . , . , " . --:: ;; ;; " , " " , l ;::. , " "j ""~y :;if : <<:: /, ./ - ;; . . [ .(; Figure 7.11-1: Caxambas Pass Location Map (from NOAA, 1990). II -434- /' I.~'-:"'-i / In) \"\ " 1927 - 1952 1969 -1973 ~,. ~<-:(;"] r . ~....::....:';; \Ls;; .'.>/- 1952 -1962 ,~ ~:::::::::::::.:.~ \....;.w...... .-:; . ~;'''' / / ("\ '-........./ 1962 - 1969 1973 - 1981 . .." \~\..:.o::'Z) ..J\Ce /:.:/r .i"."\ t' ./:.:;;.:/ (\11~ffigV CAXAMBAS PASS ~ Vegetated e Developed o Sparsely vegetated beach CJ Submerged delta; approx. -3ft. MSL o Submerged delta; approx, -6ft.MSL . Erosion ~Accretlon ~0 ~ o . . . I 1000 FEET Figure 7.11-2: Caxambas Pass: 1927 to 1981, Accretion and Erosion Patterns (from Harvey et al., 1984 - Part 2) . II -435-