U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 Station ID: 8727471 PUBLICATION DATE: 01/06/2004 Name: WACCASASSA RIVER FL NOAA Chart: 11408 Latitude: 29° 9.9' N ( 29.16500) USGS Quad: WACCASASSA BAY Longitude: 82° 48.5' W ( -82.80830) To reach the tidal bench marks by boat from the landing on Weak Ivy Creek, about 4 km (2 nm) south of Gulf Hammock, proceed downstream to the mouth of the Waccasassa River. The bench marks are located on Lone Cedar Island (local name) and across the river on Waccasassa Point. The tide gage and staff were located on a platform near the west shore of the river. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 7471 A 1978 DESIGNATION: 872 7471 A MONUMENTATION: Tidal Station disk VM#: 8196 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Unspecified deep rod OPUS PID: LATITUDE: 29° 9.0' N ( 29.15000) LONGITUDE: 82° 48.5' W ( -82.80830) The primary bench mark is a disk located 48.77 m (160.0 ft) north of bench mark WACCA AZIMUTH 1934, 2.74 m (9.0 ft) SE of a lone palm tree at the edge of Lone Cedar Island, 1 m (3 ft) south of water's edge, and 0.58 m (1.9 ft) north of a metal witness sign. The bench marrk is crimped to the top of a steel rod driven 3.7 m (12 ft) to refusal, encased in PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 Station ID: 8727471 PUBLICATION DATE: 01/06/2004 Name: WACCASASSA RIVER FL NOAA Chart: 11408 Latitude: 29° 9.9' N ( 29.16500) USGS Quad: WACCASASSA BAY Longitude: 82° 48.5' W ( -82.80830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 7471 B 1978 DESIGNATION: 872 7471 B MONUMENTATION: Tidal Station disk VM#: 8197 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Unspecified deep rod OPUS PID: LATITUDE: 29° 9.0' N ( 29.15000) LONGITUDE: 82° 48.5' W ( -82.80830) The bench mark is a disk located on Lone Cedar Island, 53 m (175 ft) SE of bench mark WACCA AZIMUTH 1934, 7 m (24 ft) NE of the water's edge, 6 m (21 ft) SW of the NE water's edge, and 0.46 m (1.5 ft) west of a witness post. The bench mark is crimped to the top of a steel rod driven 3.7 m (12 ft) to refusal, encased in PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 Station ID: 8727471 PUBLICATION DATE: 01/06/2004 Name: WACCASASSA RIVER FL NOAA Chart: 11408 Latitude: 29° 9.9' N ( 29.16500) USGS Quad: WACCASASSA BAY Longitude: 82° 48.5' W ( -82.80830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: WACCA AZIMUTH 1934 DESIGNATION: WACCA AZ MK MONUMENTATION: Azimuth Mark disk VM#: 8198 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: SETTING CLASSIFICATION: Concrete post OPUS PID: LATITUDE: 29° 9.0' N ( 29.15000) LONGITUDE: 82° 48.5' W ( -82.80830) The bench mark is a disk set in a concrete post, 53.34 m (175.0 ft) NW of bench mark 7471 B 1978, 48.77 m (160.0 ft) south of bench mark 7471 A 1978, 13.72 m (45.0 ft) south of a lone palm tree, 0.55 m (1.8 ft) west of a metal witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 Station ID: 8727471 PUBLICATION DATE: 01/06/2004 Name: WACCASASSA RIVER FL NOAA Chart: 11408 Latitude: 29° 9.9' N ( 29.16500) USGS Quad: WACCASASSA BAY Longitude: 82° 48.5' W ( -82.80830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: WACCA RM NO 1 1934 DESIGNATION: WACCA RM 1 MONUMENTATION: Reference Mark disk VM#: 8199 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: SETTING CLASSIFICATION: Concrete post OPUS PID: LATITUDE: 29° 9.0' N ( 29.15000) LONGITUDE: 82° 48.5' W ( -82.80830) The bench mark is a disk set in a concrete post, 45 m (148 ft) north from bench mark WACCA GLA 1934, 9 m (30 ft) from the water's edge, 6 m (20 ft) west of the east edge of the marsh, and 0.09 m (0.3 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 Station ID: 8727471 PUBLICATION DATE: 01/06/2004 Name: WACCASASSA RIVER FL NOAA Chart: 11408 Latitude: 29° 9.9' N ( 29.16500) USGS Quad: WACCASASSA BAY Longitude: 82° 48.5' W ( -82.80830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: WACCA GLA 1934 DESIGNATION: WACCA MONUMENTATION: Triangulation Station disk VM#: 8200 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AR1549 SETTING CLASSIFICATION: Concrete post OPUS PID: LATITUDE: 29° 9.8' N ( 29.16330) LONGITUDE: 82° 48.6' W ( -82.81000) The bench mark is a disk set in a concrete post located on the NW bank of the Waccasassa River at its mouth just west of the Lone Cedar Island, 0.8 km (0.5 mi) north of Waccasassa Point, 6 m (20 ft) from the waters edge, 6 m (20 ft) east of the marsh and south of a bunch of spanish needles, and 0.15 m (0.5 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 7 Station ID: 8727471 PUBLICATION DATE: 01/06/2004 Name: WACCASASSA RIVER FL NOAA Chart: 11408 Latitude: 29° 9.9' N ( 29.16500) USGS Quad: WACCASASSA BAY Longitude: 82° 48.5' W ( -82.80830) T I D A L D A T U M S Tidal datums at WACCASASSA RIVER based on: LENGTH OF SERIES: 6 MONTHS TIME PERIOD: July 1978 - December 1978 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8727520 CEDAR KEY, GULF OF MEXICO Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 1.135 MEAN HIGH WATER MHW = 1.034 MEAN TIDE LEVEL MTL = 0.590 MEAN SEA LEVEL MSL = 0.569 MEAN LOW WATER MLW = 0.146 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 7471 A 1978 1.707 0.673 7471 B 1978 1.748 0.714 WACCA AZIMUTH 1934 1.458 0.424 WACCA RM NO 1 1934 1.169 0.135 WACCA GLA 1934 1.548 0.514
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 7 Station ID: 8727471 PUBLICATION DATE: 01/06/2004 Name: WACCASASSA RIVER FL NOAA Chart: 11408 Latitude: 29° 9.9' N ( 29.16500) USGS Quad: WACCASASSA BAY Longitude: 82° 48.5' W ( -82.80830) 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.