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Datums Page Page 1 of 7
Station ID: 9455151 PUBLICATION DATE: 04/21/2003
Name: CAMP COVE, HARRIS PENNINSULA
AK
NOAA Chart: 16682 Latitude: 59° 41.6' N ( 59.69330)
USGS Quad: BLYING SOUND (D-8) Longitude: 149° 44.9' W (-149.74800)
To reach the tidal benchmarks from Seward via boat, proceed 15 km (8 nm) SSE
along Resurrection Bay to Calisto Head, then 32.5 km (17.6 nm) south along
Resurrection Bay to Aialik Cape, then 11.9 km (6.4 nm) west across Aialik Bay to
the mouth of Camp Cove, then 1.9 km (1 nm) SSW along Camp Cove to a small point
of land which projects north from the mainland. The benchmarks are along the
shoreline on both sides of the point. The tide station was located on the east
side of the point of land.
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 7
Station ID: 9455151 PUBLICATION DATE: 04/21/2003
Name: CAMP COVE, HARRIS PENNINSULA
AK
NOAA Chart: 16682 Latitude: 59° 41.6' N ( 59.69330)
USGS Quad: BLYING SOUND (D-8) Longitude: 149° 44.9' W (-149.74800)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING:
DESIGNATION: 945 5151 TIDAL 1
ALIAS: BM 1
MONUMENTATION: Survey disk VM#: 16385
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Boulder OPUS PID:
LATITUDE: 59° 41.7' N ( 59.69500) LONGITUDE: 149° 44.9' W (-149.74800)
The primary benchmark is a disk set in top of a rocky islet, 170 m (558 ft) NW
of BM, 108 m (354 ft) NW of BM 4 1965, 49 m (161 ft) north of benchmark 5151 A
2000, and awash at mid tide.
BENCH MARK STAMPING: 5151 A 2000
DESIGNATION: 945 5151 A
MONUMENTATION: Tidal Station disk VM#: 16361
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Rock outcrop OPUS PID:
LATITUDE: 59° 41.6' N ( 59.69330) LONGITUDE: 149° 44.9' W (-149.74800)
The benchmark is a disk set in a rock outcrop near the tip of a small point, 132
m (433 ft) NW of BM, 112 m (367 ft) east of benchmark 5151 C 2000, 102 m (335
ft) NW of BM 5 1965, 65 m (213 ft) NW of BM 4 1965, 59 m (194 ft) NE of
benchmark 5151 B 2000, and 49 m (161 ft) south of bench mark 945 5151 TIDAL 1.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 9455151 PUBLICATION DATE: 04/21/2003
Name: CAMP COVE, HARRIS PENNINSULA
AK
NOAA Chart: 16682 Latitude: 59° 41.6' N ( 59.69330)
USGS Quad: BLYING SOUND (D-8) Longitude: 149° 44.9' W (-149.74800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5151 B 2000
DESIGNATION: 945 5151 B
MONUMENTATION: Tidal Station disk VM#: 16362
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Rock outcrop OPUS PID:
LATITUDE: 59° 41.6' N ( 59.69330) LONGITUDE: 149° 44.9' W (-149.74800)
The benchmark is a disk set flush in a rock outcrop which is separated from the
mainland at high tide and in the middle of a rock and stone beach, 68 m (223 ft)
east of benchmark 9455151 C 2000, and 59 m (194 ft) SW of benchmark 5151 A 2000.
BENCH MARK STAMPING: 5151 C 2000
DESIGNATION: 945 5151 C
MONUMENTATION: Tidal Station disk VM#: 16363
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Rock outcrop OPUS PID:
LATITUDE: 59° 41.6' N ( 59.69330) LONGITUDE: 149° 44.9' W (-149.74800)
The benchmark is a disk set in a rock outcrop where the shoreline orientation
changes from E-W to N-S, 102 m (335 ft) west of bench mark 5151 A 2000, and 68 m
(223 ft) west of 5151 B 2000.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 9455151 PUBLICATION DATE: 04/21/2003
Name: CAMP COVE, HARRIS PENNINSULA
AK
NOAA Chart: 16682 Latitude: 59° 41.6' N ( 59.69330)
USGS Quad: BLYING SOUND (D-8) Longitude: 149° 44.9' W (-149.74800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: BM
DESIGNATION: 945 5151 TIDAL 2
ALIAS: BM 2
MONUMENTATION: Bolt VM#: 16386
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Rock outcrop OPUS PID:
LATITUDE: 59° 41.6' N ( 59.69330) LONGITUDE: 149° 44.8' W (-149.74700)
The benchmark is a 1/2 inch diameter copper bolt set in a sloping rock outcrop,
170 m (558 ft) SE of 945 5151 TIDAL 1, 132 m (432 ft) SE of benchmark 5151 A
2000, 68 m (223 ft) SE of BM 4 1965, 29.3 m (96.1 ft) SE of BM 5 1965, 3 m (10
ft) west of a 12" diameter overhanging spruce tree, 5m (15 ft) below the
vegetation line, and projecting about 0.006 m (0.02 ft) above the surface of the
rock.
BENCH MARK STAMPING: BM 4 1965
DESIGNATION: 945 5151 TIDAL 4
MONUMENTATION: Survey disk VM#: 16387
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Boulder OPUS PID:
LATITUDE: 59° 41.6' N ( 59.69330) LONGITUDE: 149° 44.9' W (-149.74800)
The benchmark is a disk bent on the edges and set on the top point of a rock
outcrop, 171 m (561 ft) SE of 945 5151 TIDAL 1, 68 m (223 ft) NW of BM, 65 m
(213 ft) SE of benchmark 5151 A 2000, 38.7 m (127.0 ft) NW of BM 5 1965, and
approximately 2 m (6 ft) below vegetation line.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 9455151 PUBLICATION DATE: 04/21/2003
Name: CAMP COVE, HARRIS PENNINSULA
AK
NOAA Chart: 16682 Latitude: 59° 41.6' N ( 59.69330)
USGS Quad: BLYING SOUND (D-8) Longitude: 149° 44.9' W (-149.74800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: BM 5 1965
DESIGNATION: 945 5151 TIDAL 5
MONUMENTATION: Survey disk VM#: 16388
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Rock outcrop OPUS PID:
LATITUDE: 59° 41.6' N ( 59.69330) LONGITUDE: 149° 44.9' W (-149.74800)
The benchmark is a disk set flush in the tip of a rock point on a narrow ledge,
102 m (335 ft) SE of benchmark 5151 A 2000, 38.7 m (127.0 ft) SE of BM 4 1965,
and 29.3 m (96.1 ft) NW of BM.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 9455151 PUBLICATION DATE: 04/21/2003
Name: CAMP COVE, HARRIS PENNINSULA
AK
NOAA Chart: 16682 Latitude: 59° 41.6' N ( 59.69330)
USGS Quad: BLYING SOUND (D-8) Longitude: 149° 44.9' W (-149.74800)
T I D A L D A T U M S
Tidal datums at CAMP COVE, HARRIS PENNINSULA based on:
LENGTH OF SERIES: 2 Months
TIME PERIOD: September 2000 - October 2000
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9455090 SEWARD, RESURRECTION BAY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 3.250
MEAN HIGH WATER MHW = 2.976
MEAN SEA LEVEL MSL = 1.700
MEAN TIDE LEVEL MTL = 1.696
MEAN LOW WATER MLW = 0.416
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
945 5151 TIDAL 1 1.886 -1.090
5151 A 2000 5.333 2.357
5151 B 2000 4.687 1.711
5151 C 2000 3.283 0.307
BM 2.655 -0.321
BM 4 1965 3.918 0.942
BM 5 1965 4.105 1.129
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 9455151 PUBLICATION DATE: 04/21/2003
Name: CAMP COVE, HARRIS PENNINSULA
AK
NOAA Chart: 16682 Latitude: 59° 41.6' N ( 59.69330)
USGS Quad: BLYING SOUND (D-8) Longitude: 149° 44.9' W (-149.74800)
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.