U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 PUBLICATION DATE: 02/13/1988 Station ID: 8724967 SUPERCEDED DATE: 04/21/2003 Name: MARCO ISLAND, CAXAMBAS PASS FLORIDA NOAA Chart: 11429 Latitude: 25° 54.5' N USGS Quad: MARCO ISLAND Longitude: 81° 43.7' W To reach the tidal bench marks from the intersection of County Highway 953 and State Highway 951 (Collier Boulevard), proceed south on Collier Boulevard for 3.4 miles (5.5 km) to the Deltona Corporation property. The bench marks are located along Swallow Avenue, Collier Boulevard, and on Deltona Corporation property. The tide gage and staff were located on the seawall south of Bench Mark CAXAMBAS 1959 1975. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: CAXAMBAS 1959 1975 MONUMENTATION: Survey Disk VM#: 9730 AGENCY: PID#: AC3260 SETTING CLASSIFICATION: Concrete Filled Terra-cotta Pipe The bench mark is set in the top of a concrete filled terra-cotta pipe just south of the pump house on Deltona Corporation Property, west of where a paved private road becomes a dirt road on the Deltona Corporation property, 375 feet (114 m) SE of the north corner of the bulkhead, 102 feet (31 m) NW of utility pole T-11355, 55 feet (17 m) south of a dilapidated chain link fence, 4 feet (1 m) west of a witness post, 0.5 foot (0.2 m) east of another witness post, and 0.7 foot (0.2 m) above ground level. BENCH MARK STAMPING: NO 3 CAXAMBAS 1959 1975 MONUMENTATION: Survey Disk VM#: 9731 AGENCY: PID#: AE4423 SETTING CLASSIFICATION: Concrete Pad The bench mark is set flush in the SE corner of a concrete pad at the pump house on Deltona Corporation property, 23 feet (7 m) NE of Bench Mark CAXAMBAS 1959 1975, and 14.5 feet (4.4 m) NW of a light pole.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 PUBLICATION DATE: 02/13/1988 Station ID: 8724967 SUPERCEDED DATE: 04/21/2003 Name: MARCO ISLAND, CAXAMBAS PASS FLORIDA NOAA Chart: 11429 Latitude: 25° 54.5' N USGS Quad: MARCO ISLAND Longitude: 81° 43.7' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 4 CAXAMBAS 1959 1975 MONUMENTATION: Survey Disk VM#: 9732 AGENCY: PID#: AE4424 SETTING CLASSIFICATION: Concrete Pad The bench mark is set flush in the SW corner of a concrete pad at the pump house on Deltona Corporation property, 30.7 feet (9.4 m) west of Bench Mark NO 3 CAXAMBAS 1959 1975, and 18.8 feet (5.7 m) NW of Bench Mark CAXAMBAS 1959 1975. BENCH MARK STAMPING: NO 1 1976 MONUMENTATION: Survey Disk VM#: 9733 AGENCY: PID#: AC3259 SETTING CLASSIFICATION: Concrete Pad The bench mark is set in a concrete pad at building #12906 in the SW section of Deltona Corporation property, 78 feet (24 m) east of the inside edge of the sea wall, 42 feet (13 m) NE of a light pole #51071A, 20.5 feet (6.2 m) south of the steps to the warehouse building, and 3 feet (1 m) west of the SW corner of the warehouse building. BENCH MARK STAMPING: NO 5 1976 MONUMENTATION: Survey Disk VM#: 9734 AGENCY: PID: SETTING CLASSIFICATION: Concrete Pad The bench mark is set flush in a concrete pad at building #12902, 198 feet (60 m) SE of Bench Mark NO 7 1976, 150 feet (46 m) SE of the center of the east gate, 71 feet (22 m) south of the centerline of the paved road, 4.9 feet (1.5 m) SE of a witness sign, and 1 foot (0.3 m) NW of the NW corner of building #12702.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 PUBLICATION DATE: 02/13/1988 Station ID: 8724967 SUPERCEDED DATE: 04/21/2003 Name: MARCO ISLAND, CAXAMBAS PASS FLORIDA NOAA Chart: 11429 Latitude: 25° 54.5' N USGS Quad: MARCO ISLAND Longitude: 81° 43.7' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 7 1976 MONUMENTATION: Survey Disk VM#: 9735 AGENCY: PID#: AC3261 SETTING CLASSIFICATION: Copper-clad Steel Rod The bench mark is 66 feet (20 m) west of the centerline of a paved road leading south from Collier Boulevard, 48 feet (15 m) NE of the east entrance to the Deltona Corporation property, and 1.3 feet (0.4 m) south of a power pole with a witness sign. The bench mark is at ground level, crimped to a copper-clad steel rod driven 40 feet (12 m) to refusal, and encased in a 4-inch PVC pipe and concrete kickblock. BENCH MARK STAMPING: 4967 A 1979 MONUMENTATION: Survey Disk VM#: 9736 AGENCY: PID#: AC3262 SETTING CLASSIFICATION: Copper-clad Steel Rod The bench mark is 315 feet (96 m) north of Bench Mark NO 7 1976, 74.0 feet (22.6 m) WSW of the centerpoint of the first crossover after the bend in Collier Boulevard, 3.5 feet (1.1 m) SE of a green UTS telephone junction box #1100-1, and 1.0 foot (0.3 m) east of power pole #T2826 with a witness sign attached. The bench mark is 0.1 foot (0.03 m) above the ground, crimped to a copper-clad steel rod driven 48 feet (15 m) to refusal, and encased in a pipe.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 PUBLICATION DATE: 02/13/1988 Station ID: 8724967 SUPERCEDED DATE: 04/21/2003 Name: MARCO ISLAND, CAXAMBAS PASS FLORIDA NOAA Chart: 11429 Latitude: 25° 54.5' N USGS Quad: MARCO ISLAND Longitude: 81° 43.7' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4967 B 1979 MONUMENTATION: Survey Disk VM#: 9737 AGENCY: PID#: AC3263 SETTING CLASSIFICATION: Copper-clad Steel Rod The bench mark is 164 feet (50 m) NE of Bench Mark 4967 A 1979, 83.5 feet (25.5 m) SSE of the SE corner of Island Club Condominium (a yellow 3-story stucco building), 32.0 feet (9.8 m) north of the centerline of Collier Boulevard (northbound land), 20.3 feet (6.2 m) SE of the SE corner of the parking lot, 2.5 feet (0.8 m) east of a concrete power pole, and 3 feet (1 m) east of a witness post. The bench mark is at ground level, crimped to a copper-clad steel rod driven 48 feet (15 m) to refusal, and encased in a pipe. BENCH MARK STAMPING: 4967 C 1979 MONUMENTATION: Survey Disk VM#: 10543 AGENCY: PID#: AC3264 SETTING CLASSIFICATION: Copper-clad Steel Rod The bench mark is 266 feet (81 m) north of Bench Mark 4967 B 1979, 80.9 feet (24.7 m) NNE of the NE corner of Island Club Condominium (a yellow 3-story stucco building), 39.9 feet (12.2 m) south of the centerline of Swallow Avenue, 1.0 foot (0.3 m) west of a concrete power pole with a witness sign, and 0.8 foot (0.2 m) south of the south edge of the sidewalk. The bench mark is at ground level, crimped to a copper-clad steel rod driven 64 feet (20 m) to refusal and encased in a pipe.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 PUBLICATION DATE: 02/13/1988 Station ID: 8724967 SUPERCEDED DATE: 04/21/2003 Name: MARCO ISLAND, CAXAMBAS PASS FLORIDA NOAA Chart: 11429 Latitude: 25° 54.5' N USGS Quad: MARCO ISLAND Longitude: 81° 43.7' W T I D A L D A T U M S Tidal datums at MARCO ISLAND, CAXAMBAS PASS based on: LENGTH OF SERIES: 29 MONTHS TIME PERIOD: MARCH 1976-DECEMBER 1978 TIDAL EPOCH: 1960-1978 CONTROL TIDE STATION: 8725110 NAPLES Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET: HIGHEST OBSERVED WATER LEVEL (06/02/1977) = 4.72 MEAN HIGHER HIGH WATER MHHW = 3.12 MEAN HIGH WATER MHW = 2.89 MEAN TIDE LEVEL MTL = 1.74 MEAN LOW WATER MLW = 0.59 MEAN LOWER LOW WATER MLLW = 0.00 LOWEST OBSERVED WATER LEVEL (01/18/1976) = -1.56 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In FEET above: Stamping or Designation MLLW MHW CAXAMBAS 1959 1975 6.73 3.84 NO 3 CAXAMBAS 1959 1975 6.17 3.28 NO 4 CAXAMBAS 1959 1975 6.23 3.34 NO 1 1976 9.92 7.03 NO 5 1976 8.90 6.01 NO 7 1976 6.51 3.62 4967 A 1979 7.77 4.88 4967 B 1979 7.80 4.91 4967 C 1979 6.94 4.05
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 PUBLICATION DATE: 02/13/1988 Station ID: 8724967 SUPERCEDED DATE: 04/21/2003 Name: MARCO ISLAND, CAXAMBAS PASS FLORIDA NOAA Chart: 11429 Latitude: 25° 54.5' N USGS Quad: MARCO ISLAND Longitude: 81° 43.7' W D E F I N I T I O N S Mean Sea Level (MSL) is a tidal datum determined over a 19-year National Tidal Datum Epoch. It pertains to local mean sea level and should not be confused with the fixed datums of North American Vertical Datum of 1988 (NAVD88). NAVD88 is a fixed datum derived from a simultaneous, least squares, minimum constraint adjustment of Canadian/Mexican/United States leveling observations. Local mean sea level observed at Father Point/Rimouski, Canada was held fixed as the single initial constraint. NAVD88 replaces NGVD29 as the national standard geodetic reference for heights. Bench mark elevations relative to NAVD88 are available from NGS through the World Wide Web at National Geodetic Survey. NGVD29 is a fixed datum adopted as a national standard geodetic reference for heights but is now considered superseded. NGVD29 is sometimes referred to as Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological Survey Topographic Quads. NGVD29 was originally derived from a general adjustment of the first-order leveling networks of the U.S. and Canada after holding mean sea level observed at 26 long term tide stations as fixed. Numerous local and wide-spread adjustments have been made since establishment in 1929. Bench mark elevations relative to NGVD29 are available from the National Geodetic Survey (NGS) data base via the World Wide Web at National Geodetic Survey. NAVD88 and NGVD29 are fixed geodetic datums whose elevation relationships to local MSL and other tidal datums may not be consistent from one location to another. The Vertical Mark Number (VM#) and PID# shown on the bench mark sheet are unique identifiers for bench marks in the tidal and geodetic databases, respectively. Each bench mark in either database has a single, unique VM# and/or PID# assigned. Where both VM# and PID# are indicated, both tidal and geodetic elevations are available for the bench mark listed. The NAVD88 elevation is shown on the Elevations of Tidal Datums Table Referred to MLLW only when two or more of the bench marks listed have NAVD88 elevations. The NAVD88 elevation relationship shown in the table is derived from an average of several bench mark elevations relative to tide station datum. As a result of this averaging, NAVD88 bench mark elevations computed indirectly from the tidal datums elevation table may differ slightly from NAVD88 elevations listed for each bench mark in the NGS database.