U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 10 Station ID: 8721223 PUBLICATION DATE: 01/20/2011 Name: TURTLE MOUND FL NOAA Chart: 11485 Latitude: 28° 55.6' N ( 28.92670) USGS Quad: ARIEL Longitude: 80° 49.5' W ( -80.82500) To reach the tidal bench marks from the intersection of State Highway A1A and U.S. Highway 1 in New Smyrna Beach, proceed 16 km (10 mi) east then south on State Highway A1A to the dirt drive leading south on the east side of the dead end of State Highway A1A, then 0.2 km (0.1 mi) on the dirt road to another dirt road leading west to the middle dock of three on Mosquito Lagoon. The bench marks are located along State Highway A1A and the dirt road leading south. The tide gage and staff were located 19 m (62 ft) west of the shore inside the northeast corner of the T-section dock. T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 10 Station ID: 8721223 PUBLICATION DATE: 01/20/2011 Name: TURTLE MOUND FL NOAA Chart: 11485 Latitude: 28° 55.6' N ( 28.92670) USGS Quad: ARIEL Longitude: 80° 49.5' W ( -80.82500) T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: R 212 VOL 72 DESIGNATION: R 212 VOL MONUMENTATION: Survey disk VM#: 5310 AGENCY: Florida Department of Natural Resources (FLDNR) IDB PID#: AK6911 SETTING CLASSIFICATION: Concrete post OPUS PID: LATITUDE: 28° 55.8' N ( 28.92917) LONGITUDE: 80° 49.5' W ( -80.82472) The primary bench mark is a disk set in the top of a prefabricated concrete post projecting 0.06 m (0.2 ft) above the level of the ground, 42.67 m (140.0 ft) south of the extended centerline of the gated sand road on the south side of the turtle mound as measured along the east edge of State Highway A1A, 18.29 m (60.0 ft) south of a wooden power pole, 13.72 m (45.0 ft) east of the approximate centerline of State Highway A1A, 7.62 m (25.0 ft) west of the approximate centerline of an abandoned sand road east of and parallel with State Highway A1A, 3.96 m (13.0 ft) WNW of a 3.66 m (12.0 ft) high cabbage palm, 2.60 m (8.5 ft) west of a carsonite witness post, and 0.15 m (0.5 ft) west of a metal witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 10 Station ID: 8721223 PUBLICATION DATE: 01/20/2011 Name: TURTLE MOUND FL NOAA Chart: 11485 Latitude: 28° 55.6' N ( 28.92670) USGS Quad: ARIEL Longitude: 80° 49.5' W ( -80.82500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: R 211 VOL 72 DESIGNATION: R 211 VOL MONUMENTATION: Bench Mark disk VM#: 5309 AGENCY: Florida Department of Natural Resources (FLDNR) IDB PID#: AK6912 SETTING CLASSIFICATION: Concrete post OPUS PID: LATITUDE: 28° 55.9' N ( 28.93167) LONGITUDE: 80° 49.6' W ( -80.82611) The bench mark is a disk set in the top of a prefabricated concrete post recessed 0.09 m (0.3 ft) below the level of the ground, 91.44 m (300.0 ft) NNE of the intersection of State Highway A1A (Turtle Mound Road) and the approximate centerline of the gated sand on the south side of the Turtle Mound historical site, 43.59 m (143.0 ft) NNW of survey mark 79 78 A 10 RM NO 1, 13.59 m (44.6 ft) east of the approximate centerline of State Highway A1A, 7.92 m (26.0 ft) north of a 3.66 m (12.0 ft) High Cabbage Palm, 1.52 m (5.0 ft) south of a metal witness post and 0.09 m (0.3 ft) south of a carsonite witness post. BENCH MARK STAMPING: 79 78 A10 RM NO 1 DESIGNATION: 79 78 A 10 RM 1 MONUMENTATION: Bench Mark disk VM#: 5312 AGENCY: Florida Department of Transportation (FLDT) IDB PID#: AK5463 SETTING CLASSIFICATION: Concrete post OPUS PID#: LATITUDE: 28° 55.9' N ( 28.93167) LONGITUDE: 80° 49.6' W ( -80.82611) The bench mark is a disk set in the top of a prefabricated concrete post level of the ground, 130.94 m (429.6 ft) north of the extended centerline of the wood walkway to the turtle mound historical site on the west side of State Highway A1A, 14.17 m (46.5 ft) east of the approximate centerline of State Highway A1A, 7.19 m (23.6 ft) NNW of survey mark 79 78 A10, 3.72 m (12.2 ft) west of the approximate centerline of the remnant paved road running parallel with the east side of State Highway A1A, and 0.24 m (0.8 ft) south of a FLDOT metal witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 10 Station ID: 8721223 PUBLICATION DATE: 01/20/2011 Name: TURTLE MOUND FL NOAA Chart: 11485 Latitude: 28° 55.6' N ( 28.92670) USGS Quad: ARIEL Longitude: 80° 49.5' W ( -80.82500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 79 78 A 10 DESIGNATION: 79 78 A 10 MONUMENTATION: Survey disk VM#: 5314 AGENCY: FL Department of Transportation (FLDT) IDB PID#: AK5461 SETTING CLASSIFICATION: Concrete monument OPUS PID#: AK5461 LATITUDE: 28° 55.9' N ( 28.93139) LONGITUDE: 80° 49.6' W ( -80.82611) The bench mark is a disk set in the top of a concrete monument recessed 0.09 m (0.3 ft) below the level of the ground, 123.75 m (406.0 ft) north of the extended centerline of the wood walkway to the turtle mound historical site on the west side of State Highway A1A, 14.63 m (48.0 ft) east of the approximate centerline of State Highway A1A, 7.19 m (23.6 ft) south of survey mark RM NO 1 79 78 A 10, 3.72 m (12.2 ft) west of the approximate centerline of the remnant paved road running parallel with the east side of State Highway A1A, and 0.49 m (1.6 ft) east of a metal witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 10 Station ID: 8721223 PUBLICATION DATE: 01/20/2011 Name: TURTLE MOUND FL NOAA Chart: 11485 Latitude: 28° 55.6' N ( 28.92670) USGS Quad: ARIEL Longitude: 80° 49.5' W ( -80.82500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 1223 J 1987 DESIGNATION: 872 1223 J TIDAL MONUMENTATION: Tidal Station disk VM#: 17182 AGENCY: FL Department of Natural Resources (FLDNR) IDB PID#: AK7013 SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: AK7013 LATITUDE: 28° 55.7' N ( 28.92889) LONGITUDE: 80° 49.5' W ( -80.82417) The bench mark is a disk located 65.23 m (214.0 ft) north of the approximate centerline of the east end of east-west sand road that is opposite the visitor information center, 18.96 m (62.2 ft) north of a wooden power pole on the west side of the north-south sand road, 17.59 m (57.7 ft) NNW of a wooden power pole on the east side of the north-south sand road, 2.90 m (9.5 ft) ENE of the center of a dim north-south sand road and 1.77 m (5.8 ft) SW, and 0.30 m (1.0 ft) south of carsonite witness posts. The bench mark is crimped to the top of a stainless steel rod encased in a PVC pipe and concrete kickblock, recessed 0.21 m (0.7 ft) below the level of the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 10 Station ID: 8721223 PUBLICATION DATE: 01/20/2011 Name: TURTLE MOUND FL NOAA Chart: 11485 Latitude: 28° 55.6' N ( 28.92670) USGS Quad: ARIEL Longitude: 80° 49.5' W ( -80.82500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 1223 K 1987 DESIGNATION: 872 1223 K TIDAL MONUMENTATION: Tidal Station disk VM#: 17183 AGENCY: FL Department of Natural Resources (FLDNR) IDB PID#: AK7014 SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: AK7014 LATITUDE: 28° 56.1' N ( 28.93528) LONGITUDE: 80° 49.7' W ( -80.82833) The bench mark is a disk located 112.78 m (370.0 ft) SSE of the south side of the Canaveral National Seashore entrance booth, 49.98 m (160.7 ft) north of the approximate centerline of the northernmost paved driveway of a boat ramp parking area, 7.22 m (23.7 ft) ENE of a wooden power pole, 5.85 m (19.2 ft) WSW of the approximate centerline of State Highway A1A and 3.66 m (12.0 ft) ENE of a carsonite witness post. The bench mark is crimped to the top of a stainless steel rod encased in a PVC pipe and concrete kickblock level with the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 10 Station ID: 8721223 PUBLICATION DATE: 01/20/2011 Name: TURTLE MOUND FL NOAA Chart: 11485 Latitude: 28° 55.6' N ( 28.92670) USGS Quad: ARIEL Longitude: 80° 49.5' W ( -80.82500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: K 212 1963 DESIGNATION: K 212 MONUMENTATION: Bench Mark disk VM#: 17184 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AK0553 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 28° 55.7' N ( 28.92861) LONGITUDE: 80° 49.5' W ( -80.82417) The bench mark is a disk set in the top of a concrete monument projecting 0.09 m (0.3 ft) above the level of the ground, 54.56 m (179.0 ft) south of the approximate centerline of the east end of the east-west sand road that is opposite the visitor information center, 14.78 m (48.5 ft) south of a sanitary sewer manhole cover, 13.72 m (45.0 ft) ESE of the NE corner of a wood cottage, 9.75 m (32.0 ft) east of the SE corner of the wood cottage, 6.71 m (22.0 ft) SW of the approximate centerline of a north-south sand road, 1.22 m (4.0 ft)SW of a wooden power pole, and 0.30 m (1.0 ft) north of a carsonite witness post. BENCH MARK STAMPING: 79 78 A 11 DESIGNATION: 79 78 A 11 FLDNR MONUMENTATION: Bench Mark disk VM#: 19511 AGENCY: FL Department of Transportation (FLDT) IDB PID#: AK5465 SETTING CLASSIFICATION: Concrete headwall OPUS PID: LATITUDE: 28° 56.4' N ( 28.93944) LONGITUDE: 80° 49.9' W ( -80.83222) The bench mark is a disk located 57.61 m (189.0 ft) SE of the south end of a concrete headwall, 6.86 m (22.5 ft) NE of the centerline of State Road A1A, and 5.49 m (18.0 ft) SW of the brush line.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 10 Station ID: 8721223 PUBLICATION DATE: 01/20/2011 Name: TURTLE MOUND FL NOAA Chart: 11485 Latitude: 28° 55.6' N ( 28.92670) USGS Quad: ARIEL Longitude: 80° 49.5' W ( -80.82500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 79 78 A 12 DESIGNATION: 79 78 A 12 FLDNR MONUMENTATION: Bench Mark disk VM#: 19512 AGENCY: FL Department of Transportation (FLDT) IDB PID#: AK5469 SETTING CLASSIFICATION: Concrete post OPUS PID#: AK5469 LATITUDE: 28° 57.1' N ( 28.95167) LONGITUDE: 80° 50.4' W ( -80.84056) The bench mark is a disk 19.20 m (63.0 ft) SE of a power pole, 10.67 m (35.0 ft) SE of the centerline of 15th Street and 6.86 m (22.5 ft) NE of the center line of State Road A1A.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 9 of 10 Station ID: 8721223 PUBLICATION DATE: 01/20/2011 Name: TURTLE MOUND FL NOAA Chart: 11485 Latitude: 28° 55.6' N ( 28.92670) USGS Quad: ARIEL Longitude: 80° 49.5' W ( -80.82500) T I D A L D A T U M S Tidal datums at TURTLE MOUND based on: LENGTH OF SERIES: 1 MONTH TIME PERIOD: March 1979 - March 1979 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8720030 FERNANDINA BEACH, AMELIA RIVER Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: North American Vertical Datum NAVD88 = 0.176 MEAN HIGHER HIGH WATER MHHW = 0.170 MEAN HIGH WATER MHW = 0.139 MEAN TIDE LEVEL MTL = 0.070 MEAN SEA LEVEL MSL = 0.055 MEAN LOW WATER MLW = 0.001 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW R 212 VOL 72 3.440 3.301 R 211 VOL 72 2.279 2.140 79 78 A10 RM NO 1 3.012 2.873 79 78 A 10 2.945 2.806 1223 J 1987 4.200 4.061 1223 K 1987 1.578 1.439 K 212 1963 4.159 4.020 79 78 A 11 1.418 1.279 79 78 A 12 1.462 1.323 Foot Notes: Geodetic heights of the bench marks meet all NOAA/NOS/NGS quality control standards for Second Order, Class 1 leveling. It is advised that a confirmation set of levels be established for bench marks 1223 J 1987, 1223 K 1987, 79 78 A 11, 79 78 A 12, and K 212 1963 to verify height differences before using tidal bench mark elevation information.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 10 of 10 Station ID: 8721223 PUBLICATION DATE: 01/20/2011 Name: TURTLE MOUND FL NOAA Chart: 11485 Latitude: 28° 55.6' N ( 28.92670) USGS Quad: ARIEL Longitude: 80° 49.5' W ( -80.82500) 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.