U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 9
Station ID: 8653215 PUBLICATION DATE: 12/22/2023
Name: RODANTHE, PAMLICO SOUND
NC
NOAA Chart: 12204 Latitude: 35° 35.7' N ( 35.59500)
USGS Quad: RODANTHE Longitude: 75° 28.3' W ( -75.47170)
To reach the tidal bench marks from the Rodanthe Post Office proceed northerly
along NC Highway 12 for 3.78 km (2.35 mi) to the Chicamacomico Life Saving
Station on the right and Myrna Peters Road on the left. Three of the Bench
Marks are located on the grounds of the Life Saving Station and three are
located on the south side of Myrna Peters Road. The Gauge is located at the end
of Myrna Peters Road south of the NCDOT Emergency Ferry 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 9
Station ID: 8653215 PUBLICATION DATE: 12/22/2023
Name: RODANTHE, PAMLICO SOUND
NC
NOAA Chart: 12204 Latitude: 35° 35.7' N ( 35.59500)
USGS Quad: RODANTHE Longitude: 75° 28.3' W ( -75.47170)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: RODAN 1962
DESIGNATION: RODAN
MONUMENTATION: Triangulation Station disk VM#: 3543
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: galvanized steel pipe driven into groundOPUS PID#: EX0304
LATITUDE: 35° 35.7' N ( 35.59579) LONGITUDE: 75° 27.9' W ( -75.46578)
The bench mark is a disk located in the center of the foundation of an old
signal tower at the old U.S. Coast Guard Station, 44.29 m (145.3 ft) NE of the
SE corner of the main U.S. Coast Guard building, 40.84 m (134.0 ft) east of the
NE corner of the main building, 34.0 m (111.6 ft) SSW of the centerline of Laura
Lane, 11.4 m (37.4 ft) SW of the SW corner of a 2 story frame house, and 1.04 m
(3.4 ft) south of a metal witness post. The bench mark is set 15 cm (0.5 ft)
above the ground, crimped to the top of a copper weld rod driven 7.3 m (23.9
ft), and encased in a 2-inch galvanized steel pipe.
BENCH MARK STAMPING: 865 3215 A 1977
DESIGNATION: 865 3215 A
MONUMENTATION: Tidal Station disk VM#: 3544
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete post OPUS PID:
LATITUDE: 35° 35.7' N ( 35.59500) LONGITUDE: 75° 28.3' W ( -75.47170)
The primary bench mark is a disk set in the top of an 8-inch concrete post,
22.89 m (75.1 ft) SSW of the SE corner of the old U.S. Coast Guard slip, 19.69 m
(64.6 ft) ESE of the SE corner of a fish house on the south side of the slip,
6.25 m (20.5 ft) west of the utility pole closest to the waters edge, and 0.15 m
(0.5 ft) above the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 9
Station ID: 8653215 PUBLICATION DATE: 12/22/2023
Name: RODANTHE, PAMLICO SOUND
NC
NOAA Chart: 12204 Latitude: 35° 35.7' N ( 35.59500)
USGS Quad: RODANTHE Longitude: 75° 28.3' W ( -75.47170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 865 3215 B 1977
DESIGNATION: 865 3215 B
MONUMENTATION: Tidal Station disk VM#: 3545
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete septic tank OPUS PID:
LATITUDE: 35° 35.7' N ( 35.59500) LONGITUDE: 75° 28.3' W ( -75.47170)
The bench mark is a disk set flush in a drill hole in the NW corner of the
concrete top of a septic tank for a community building located WSW of the
intersection of State Highway 12 and the road leading to the old U.S. Coast
Guard slip, 3.44 m (11.3 ft) NW of the NW corner of the community building, 0.30
m (1.0 ft) south of the north edge of the septic tank, 0.30 m (1.0 ft) east of
the west edge of the septic tank, and 0.46 m (1.5 ft) above the ground.
BENCH MARK STAMPING: RODANTHE 3215 C
DESIGNATION: 865 3215 C
MONUMENTATION: Tidal Station disk VM#: 3546
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete post OPUS PID#: BBHV16
LATITUDE: 35° 35.7' N ( 35.59583) LONGITUDE: 75° 28.0' W ( -75.46727)
The bench mark is a disk set in the top of an 8-inch concrete post located 15.8
m (51.7 ft) SSW of a power pole with reference tag, 15.7 m (51.5 ft) SE of the
centerline of NC Highway 12, 14.6 m (47.8 ft) SSW of a telephone pedestal
(12NR-56E), 3.0 m (9.9 ft) west of the easternmost end of the Chicamacomico
museum sign, and 1.7 m (5.6 ft) SW of the westernmost end of the Chicamacomico
museum sign. The mark projects 5 cm (2 in) with the ground and is about level
with NC Highway 12.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 9
Station ID: 8653215 PUBLICATION DATE: 12/22/2023
Name: RODANTHE, PAMLICO SOUND
NC
NOAA Chart: 12204 Latitude: 35° 35.7' N ( 35.59500)
USGS Quad: RODANTHE Longitude: 75° 28.3' W ( -75.47170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: C 194 1977
DESIGNATION: C 194
MONUMENTATION: Vertical Control disk VM#: 3547
AGENCY: National Geodetic Survey (NGS) IDB PID#:
SETTING CLASSIFICATION: Steel rod with base plate driven into
ground OPUS PID#: EX0211
LATITUDE: 35° 35.6' N ( 35.59330) LONGITUDE: 75° 28.1' W ( -75.46830)
The bench mark is a disk located SSW of the intersection of State Highway 12 and
the road leading to the old U.S. Coast Guard slip, 35.81 m (117.5 ft) NNE of the
NE corner of a gift shop and motel, 20.76 m (68.1 ft) WNW of utility pole #540,
12.04 m (39.5 ft) west of the centerline of State Highway 12, and 5.73 m (18.8
ft) NE of utility pole #355. The bench mark is set 20 cm (0.7 ft) above the
ground, crimped to the top of a steel rod driven 1.2 m (3.9 ft), and encased in
a PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 9
Station ID: 8653215 PUBLICATION DATE: 12/22/2023
Name: RODANTHE, PAMLICO SOUND
NC
NOAA Chart: 12204 Latitude: 35° 35.7' N ( 35.59500)
USGS Quad: RODANTHE Longitude: 75° 28.3' W ( -75.47170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: RODAN NO 3 1962 1969
DESIGNATION: RODAN RM 3
MONUMENTATION: Reference Mark disk VM#: 24691
AGENCY: US Coast and Geodetic Survey
(USC&CGS) IDB PID#:
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 35° 35.8' N ( 35.59586) LONGITUDE: 75° 28.0' W ( -75.46601)
The bench mark is a desk set in a concrete monument located 25.8 m (84.6 ft)
south of the centerline of Laura Lane, 2.6 m (8.5 ft) west of the west edge of a
concrete sidewalk, 1.4 m (4.6 ft) south of the fence corner, and 0.6 m (2.0 ft)
east of a white picket fence. The mark is flush with the ground and is about 0.3
m (1 ft) higher than Laura Lane.
BENCH MARK STAMPING: 3215 D 2022
DESIGNATION: 865 3215 D
MONUMENTATION: Flange-encased Rod VM#: 24692
AGENCY: North Carolina Geodetic Survey (NCGS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 35° 35.8' N ( 35.59586) LONGITUDE: 75° 28.1' W ( -75.46804)
The bench mark is a stainless steel rod located 40.9 m (134.3 ft) NNE of a flag
pole, 37.7 m (123.7 ft) west of a 38 cm (15 inch) culvert, 33.2 m (108.8 ft) NE
of a power pole (722809) with reference tag, 32.2 m (105.7 ft) NW of the west
end of the community building sign, and 3.8 m (12.5 ft) south of the centerline
of Myrna Peters Road. The mark is recessed 8 cm (3 in) with the ground and is
about level with Myrna Peters Road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 9
Station ID: 8653215 PUBLICATION DATE: 12/22/2023
Name: RODANTHE, PAMLICO SOUND
NC
NOAA Chart: 12204 Latitude: 35° 35.7' N ( 35.59500)
USGS Quad: RODANTHE Longitude: 75° 28.3' W ( -75.47170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3215 E 2022
DESIGNATION: 865 3215 E
MONUMENTATION: Flange-encased Rod VM#: 24693
AGENCY: North Carolina Geodetic Survey (NCGS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 35° 35.7' N ( 35.59583) LONGITUDE: 75° 28.1' W ( -75.46880)
The bench mark is a stainless steel rod located 31.7 m (104.0 ft) NNW of the NW
corner of the community building, 17.7 m (58.0 ft) ENE of the NW corner of the
playground, 12.7 m (41.8 ft) east of a 8 x 8 inch post with reference tag, 4.6 m
(15.1 ft) NNE of the NE corner of a playground, and 3.7 m (12.0 ft) south of the
centerline of Myrna Peters Road. The mark is recessed 8 cm (3 inches) with the
ground and is about level with Myrna Peters Road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 9
Station ID: 8653215 PUBLICATION DATE: 12/22/2023
Name: RODANTHE, PAMLICO SOUND
NC
NOAA Chart: 12204 Latitude: 35° 35.7' N ( 35.59500)
USGS Quad: RODANTHE Longitude: 75° 28.3' W ( -75.47170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NCRT BASE 2019
DESIGNATION: NCRT REF MON
MONUMENTATION: Bench Mark disk VM#: 24694
AGENCY: North Carolina Geodetic Survey (NCGS) IDB PID#:
SETTING CLASSIFICATION: Antenna base OPUS PID:
LATITUDE: 35° 35.7' N ( 35.59540) LONGITUDE: 75° 28.2' W ( -75.46938)
The mark is set in the concrete base of the CORS antenna located 48.8 m (160.2
ft) south of the centerline of Myrna Peters Road, 8.6 m (28.3 ft) NE of a camera
support pole, 6.2 m (20.5 ft) south of a light pole, 4.1 m (13.3 ft) north of
the weather station support pole, 3.3 m (10.8 ft) ENE of the NE corner of a
transformer (722701), and 0.4 m (1.3 ft) WNW of the center of the antenna pole.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 9
Station ID: 8653215 PUBLICATION DATE: 12/22/2023
Name: RODANTHE, PAMLICO SOUND
NC
NOAA Chart: 12204 Latitude: 35° 35.7' N ( 35.59500)
USGS Quad: RODANTHE Longitude: 75° 28.3' W ( -75.47170)
T I D A L D A T U M S
Tidal datums at RODANTHE, PAMLICO SOUND based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: July 2023 - July 2023
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8652587 OREGON INLET MARINA, PAMLICO SOUND
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.243
MEAN HIGH WATER MHW = 0.218
North American Vertical Datum NAVD88 = 0.154
MEAN TIDE LEVEL MTL = 0.130
MEAN SEA LEVEL MSL = 0.129
MEAN LOW WATER MLW = 0.041
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
RODAN 1962 1.908 1.690
865 3215 A 1977 0.891 0.673
865 3215 B 1977 1.759 1.541
RODANTHE 3215 C 1.338 1.120
C 194 1977 1.456 1.238
RODAN NO 3 1962 1969 1.552 1.334
3215 D 2022 1.285 1.067
3215 E 2022 1.301 1.083
NCRT BASE 2019 1.747 1.529
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 9
Station ID: 8653215 PUBLICATION DATE: 12/22/2023
Name: RODANTHE, PAMLICO SOUND
NC
NOAA Chart: 12204 Latitude: 35° 35.7' N ( 35.59500)
USGS Quad: RODANTHE Longitude: 75° 28.3' W ( -75.47170)
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.