U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 8724967 PUBLICATION DATE: 05/06/2003 Name: MARCO ISLAND, CAXAMBAS PASS FL NOAA Chart: 11429 Latitude: 25° 54.5' N ( 25.90830) USGS Quad: MARCO ISLAND Longitude: 81° 43.7' W ( -81.72830) To reach the tidal bench marks from the intersection of State Road 92 and State Road 951 (Collier Boulevard) on Marco Island, proceed south on Collier Boulevard for 2.9 km (1.8 mi) 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 DESIGNATION: 872 4967 CAXAMBAS RESET MONUMENTATION: Triangulation Station disk VM#: 9730 AGENCY: National Geodetic Survey (NGS) IDB PID#: AC3260 SETTING CLASSIFICATION: Concrete filled terra-cotta pipe OPUS PID: LATITUDE: 25° 54.6' N ( 25.91000) LONGITUDE: 81° 43.7' W ( -81.72830) The primary bench mark is a disk 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, 114 (375 ft) SE of the north corner of the bulkhead, 91 m (300 ft) NNE of the NE corner of an abandoned industrial building #12912, 31 m (102 ft) NW of utility pole T-11355, 17 m (55 ft) south of a dilapidated chain link fence, 1.22 m (4.0 ft) west of a metal witness post, 0.15 m (0.5 ft) east of another metal witness post, and 0.21 m (0.7 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 8724967 PUBLICATION DATE: 05/06/2003 Name: MARCO ISLAND, CAXAMBAS PASS FL NOAA Chart: 11429 Latitude: 25° 54.5' N ( 25.90830) USGS Quad: MARCO ISLAND Longitude: 81° 43.7' W ( -81.72830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 7 1976 DESIGNATION: 872 4967 TIDAL 7 MONUMENTATION: Tidal Station disk VM#: 9735 AGENCY: National Ocean Survey (NOS) IDB PID#: AC3261 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 25° 54.6' N ( 25.91000) LONGITUDE: 81° 43.5' W ( -81.72500) The bench mark is a disk located on a paved road leading south to an abandoned warehouses, 20 m (66 ft) west of the centerline of a paved road leading south from Collier Boulevard, 15 m (48 ft) NE of the east entrance to the Deltona Corporation property, and 0.40 m (1.3 ft) south of a power pole with a witness sign. The bench mark is set at ground level, crimped to the top of a copper-clad steel rod driven 12 m (40 ft) to refusal, and encased in a 4-inch PVC pipe and concrete kickblock. BENCH MARK STAMPING: 4967 A 1979 DESIGNATION: 872 4967 A TIDAL MONUMENTATION: Tidal Station disk VM#: 9736 AGENCY: National Ocean Survey (NOS) IDB PID#: AC3262 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 25° 54.6' N ( 25.91000) LONGITUDE: 81° 43.5' W ( -81.72500) The bench mark is a disk located south on Collier Boulevard on Deltona Corporation property, 96 m (315 ft) north of bench mark NO 7 1976, 23 m (74.0 ft) WSW of the centerpoint of the first crossover after the bend in Collier Boulevard, 1.07 m (3.5 ft) SE of a green UTS telephone junction box #1100-1, and 0.30 m (1.0 ft) east of power pole #T2826 with a witness sign attached. The bench mark is set 3 cm (0.1 ft) above the ground, crimped to the top of a copper-clad steel rod driven 14.6 m (48 ft) to refusal, and encased in a pipe.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 8724967 PUBLICATION DATE: 05/06/2003 Name: MARCO ISLAND, CAXAMBAS PASS FL NOAA Chart: 11429 Latitude: 25° 54.5' N ( 25.90830) USGS Quad: MARCO ISLAND Longitude: 81° 43.7' W ( -81.72830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4967 B 1979 DESIGNATION: 872 4967 B TIDAL MONUMENTATION: Tidal Station disk VM#: 9737 AGENCY: National Ocean Survey (NOS) IDB PID#: AC3263 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID#: AC3263 LATITUDE: 25° 54.7' N ( 25.91170) LONGITUDE: 81° 43.5' W ( -81.72500) The bench mark is a disk located south on Collier Boulevard on the Deltona Corporation property, 50 m (164 ft) NE of bench mark 4967 A 1979, 25.45 m (83.5 ft) SSE of the SE corner of Island Club Condominium (a yellow 3-story stucco building), 9.75 m (32.0 ft) north of the centerline of Collier Boulevard (northbound land), 6.19 m (20.3 ft) SE of the SE corner of the parking lot, 0.76 m (2.5 ft) east of a concrete power pole, and 1 m (3 ft) east of a witness post. The bench mark is set at ground level, crimped to the top of a copper-clad steel rod driven 14.6 m (48 ft) to refusal, and encased in a pipe. BENCH MARK STAMPING: 4967 C 1979 DESIGNATION: 872 4967 C TIDAL MONUMENTATION: Tidal Station disk VM#: 10543 AGENCY: National Ocean Survey (NOS) IDB PID#: AC3264 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 25° 54.8' N ( 25.91330) LONGITUDE: 81° 43.5' W ( -81.72500) The bench mark is a disk located east on Swallow Avenue, 81 m (266 ft) north of bench mark 4967 B 1979, 24.66 m (80.9 ft) NNE of the NE corner of Island Club Condominium (a yellow 3-story stucco building), 12.16 m (39.9 ft) south of the centerline of Swallow Avenue, 0.30 m (1.0 ft) west of a concrete power pole with a witness sign, and 0.24 m (0.8 ft) south of the south edge of the sidewalk. The bench mark is set at ground level, crimped to the top of a copper-clad steel rod driven 19.5 m (64 ft) to refusal, and encased in a pipe.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 8724967 PUBLICATION DATE: 05/06/2003 Name: MARCO ISLAND, CAXAMBAS PASS FL NOAA Chart: 11429 Latitude: 25° 54.5' N ( 25.90830) USGS Quad: MARCO ISLAND Longitude: 81° 43.7' W ( -81.72830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: CAXAMBAS 2 1979 DESIGNATION: 872 4967 CAXAMBAS 2 MONUMENTATION: Triangulation Station disk VM#: 16796 AGENCY: National Geodetic Survey (NGS) IDB PID#: AC3265 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 25° 54.7' N ( 25.91170) LONGITUDE: 81° 43.6' W ( -81.72670) The bench mark is a disk set in the top of a concrete monument in the median of lane, 14.87 m (48.8 ft) NE of the bench mark Caxambas 2 NO 6 1979, 6.13 m (20.1 ft) SW of the centerline of the northbound lane of Collier Boulevard, 6 m (20 ft) NE of the centerline of the southbound lane of Collier Boulevard, and 2.29 m (7.5 ft) south of a witness point. BENCH MARK STAMPING: CAXAMBAS 2 NO 6 1979 DESIGNATION: 872 4967 CAXAMBAS 2 RM 6 MONUMENTATION: Reference Mark disk VM#: 16797 AGENCY: National Geodetic Survey (NGS) IDB PID#: AC3266 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 25° 54.7' N ( 25.91170) LONGITUDE: 81° 43.5' W ( -81.72500) The bench mark is a disk set in the top of a concrete monument located south on Collier Boulevard, 14.87 m (48.8 ft) SW of bench mark CAXAMBAS 2 1979, 10.15 m (33.3 ft) NW of an Australian pine tree, and 8.78 m (28.8 ft) SW of the centerline of the southbound lane of Collier Boulevard.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 8724967 PUBLICATION DATE: 05/06/2003 Name: MARCO ISLAND, CAXAMBAS PASS FL NOAA Chart: 11429 Latitude: 25° 54.5' N ( 25.90830) USGS Quad: MARCO ISLAND Longitude: 81° 43.7' W ( -81.72830) T I D A L D A T U M S Tidal datums at MARCO ISLAND, CAXAMBAS PASS based on: LENGTH OF SERIES: 36 MONTHS TIME PERIOD: February 1976 - January 1979 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8725110 NAPLES, GULF OF MEXICO Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (06/02/1977) = 1.357 MEAN HIGHER HIGH WATER MHHW = 0.932 MEAN HIGH WATER MHW = 0.856 North American Vertical Datum NAVD88 = 0.721 MEAN TIDE LEVEL MTL = 0.519 MEAN SEA LEVEL MSL = 0.513 MEAN LOW WATER MLW = 0.181 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (01/18/1976) = -0.493 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW CAXAMBAS 1959 1975 2.000 1.144 NO 7 1976 1.932 1.076 4967 A 1979 2.316 1.460 4967 B 1979 2.325 1.469 4967 C 1979 2.064 1.208 CAXAMBAS 2 1979 2.185 1.329 CAXAMBAS 2 NO 6 1979 2.073 1.217
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 8724967 PUBLICATION DATE: 05/06/2003 Name: MARCO ISLAND, CAXAMBAS PASS FL NOAA Chart: 11429 Latitude: 25° 54.5' N ( 25.90830) USGS Quad: MARCO ISLAND Longitude: 81° 43.7' W ( -81.72830) 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 NGS's Integrated Data Base (IDB PID) provides geodetic datum based on traditionally leveled and bluebooked ties to the National Spatial Reference System(NSRS) https://www.ngs.noaa.gov/datasheets/. The NGS Online Positioning User Service (OPUS PID) provides geodetic datum based on GPS position & tie it to the NSRS https://www.ngs.noaa.gov/OPUS/. 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.