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National Ocean Service
Datums Page Page 1 of 9
Station ID: 9457283 PUBLICATION DATE: 01/10/2005
Name: KODIAK, ST PAULS HARBOR
AK
NOAA Chart: 16596 Latitude: 57° 44.7' N ( 57.74500)
USGS Quad: WOMENS BAY Longitude: 152° 29.0' W (-152.48300)
To reach the tidal bench marks from the Kodiak airport, proceed south on Alaska
Highway for 2.6 km (1.6 mi) to the U.S. Coast Guard Support Center, turn east
into the center through the main gate and continue until a taxiway for Coast
Guard planes and helicopters is crossed, then take the first left onto the
gravel road past the taxiway, continue on the road as it parallels the runway
18-36 to another road that is 0.6 km (0.4 mi) north of the south end of the
runway, turn right and go to the boathouse at the bottom of the hill. The bench
marks are in the general vicinity of the small boat harbor. The tide gage and
staff were in the old U.S. Coast Guard boathouse.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 14 1964
DESIGNATION: 945 7283 TIDAL 14
MONUMENTATION: Tidal Station disk VM#: 11687
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 57° 44.7' N ( 57.74500) LONGITUDE: 152° 29.0' W (-152.48300)
The primary bench mark is a disk set in the concrete foundation at the SE corner
of GMD Building No. 594, 107 m (350 ft) SW of the Coast Guard Station boathouse,
and at the south edge of the metal rolling door.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 9
Station ID: 9457283 PUBLICATION DATE: 01/10/2005
Name: KODIAK, ST PAULS HARBOR
AK
NOAA Chart: 16596 Latitude: 57° 44.7' N ( 57.74500)
USGS Quad: WOMENS BAY Longitude: 152° 29.0' W (-152.48300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 15 1964
DESIGNATION: 945 7283 TIDAL 15
MONUMENTATION: Tidal Station disk VM#: 11688
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Concrete storage tank OPUS PID:
LATITUDE: 57° 44.7' N ( 57.74500) LONGITUDE: 152° 29.0' W (-152.48300)
The bench mark is a disk set in the NW edge of a round concrete top of a 11 m
(35 ft) diameter concrete storage tank, 305 m (1000 ft) NE of the south end of
runway 18-36, 38 m (125 ft) SE of the centerline of the gravel road which runs
parallel to the east of runway 18-36, 4 m (12 ft) west of the SW corner of a 2 m
x 2 m (5 ft x 5 ft) concrete structure that sets atop the tank, 2.68 m (8.8 ft)
north of the NE corner of a 3 m x 2 m (9 ft x 7 ft) concrete structure that sets
atop the tank, 1.01 m (3.3 ft) east of an orange witness post, and 2 m (5 ft)
below road level.
BENCH MARK STAMPING: NO 16 1964
DESIGNATION: 945 7283 TIDAL 16
MONUMENTATION: Tidal Station disk VM#: 11689
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 57° 44.7' N ( 57.74500) LONGITUDE: 152° 29.0' W (-152.48300)
The bench mark is a disk set in the SE corner of a 1 m x 2 m (3 ft x 5 ft)
concrete foundation supporting a red flashing taxiway light, and 12 m (40 ft) NW
of the intersection of the centerline of 6th Street and the road paralleling the
beach to Hangers 1 and 3.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 9
Station ID: 9457283 PUBLICATION DATE: 01/10/2005
Name: KODIAK, ST PAULS HARBOR
AK
NOAA Chart: 16596 Latitude: 57° 44.7' N ( 57.74500)
USGS Quad: WOMENS BAY Longitude: 152° 29.0' W (-152.48300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 19 1971
DESIGNATION: 945 7283 TIDAL 19
MONUMENTATION: Tidal Station disk VM#: 11690
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Concrete walk OPUS PID:
LATITUDE: 57° 44.7' N ( 57.74500) LONGITUDE: 152° 29.0' W (-152.48300)
The bench mark is a disk set in a concrete walk at the NW corner of the Coast
Guard station boathouse, 9.60 m (31.5 ft) SE of bench mark NO 20 1972, 5.64 m
(18.5 ft) NW of the bulkhead by the corner of the boat shed, and 0.37 m (1.2 ft)
NW of the NW corner of the building.
BENCH MARK STAMPING: NO 20 1972
DESIGNATION: 945 7283 TIDAL 20
MONUMENTATION: Tidal Station disk VM#: 11691
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Concrete walk OPUS PID:
LATITUDE: 57° 44.7' N ( 57.74500) LONGITUDE: 152° 29.0' W (-152.48300)
The bench mark is a disk set in a concrete walk, 10 m (33 ft) NW of the NW
corner of the Coast Guard station boathouse, and 0.3 m (1 ft) NE of the SE
corner of a quonset hut for the small boat storage.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 9
Station ID: 9457283 PUBLICATION DATE: 01/10/2005
Name: KODIAK, ST PAULS HARBOR
AK
NOAA Chart: 16596 Latitude: 57° 44.7' N ( 57.74500)
USGS Quad: WOMENS BAY Longitude: 152° 29.0' W (-152.48300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: TIDAL 21 1974
DESIGNATION: 945 7283 TIDAL 21
MONUMENTATION: Tidal Station disk VM#: 11692
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 57° 44.7' N ( 57.74500) LONGITUDE: 152° 29.0' W (-152.48300)
The bench mark is a disk set in the NE corner of a concrete foundation for a
runway light about 610 m (2000 ft) NE of the southern end of runway 18-36, 12.34
m (40.5 ft) SW of a buried cable, and 11 m (35 ft) east of the eastern edge of
the pavement of runway 18-36 (all other lights are within 1 m (3 ft) of the
runway).
BENCH MARK STAMPING: 7283 A 1982
DESIGNATION: 945 7283 TIDAL A
MONUMENTATION: Tidal Station disk VM#: 11693
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 57° 44.7' N ( 57.74500) LONGITUDE: 152° 29.0' W (-152.48300)
The bench mark is a disk located at the NE corner of the intersection of the
gravel road paralleling runway 18-36 and the gravel road leading to the Coast
Guard station boathouse, 60 m (198 ft) east of the east edge of runway 18-36,
17.68 m (58.8 ft) SE of the centerline of the gravel road paralleling runway
18-36, 9 m (31 ft) north of the centerline of the gravel road leading to the
Coast Guard boathouse, and 0.18 m (0.6 ft) south of the orange fiberglass
witness post. The bench mark is crimped to the top of a galvanized steel rod,
driven 3.0 m (10 ft), and encased in a 4-inch ABS pipe with cover.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 9
Station ID: 9457283 PUBLICATION DATE: 01/10/2005
Name: KODIAK, ST PAULS HARBOR
AK
NOAA Chart: 16596 Latitude: 57° 44.7' N ( 57.74500)
USGS Quad: WOMENS BAY Longitude: 152° 29.0' W (-152.48300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7283 B 1982
DESIGNATION: 945 7283 TIDAL B
MONUMENTATION: Tidal Station disk VM#: 11694
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 57° 44.7' N ( 57.74500) LONGITUDE: 152° 29.0' W (-152.48300)
The bench mark is a disk located north of the intersection of the gravel road
paralleling runway 18-36 and the gravel road leading to a burn pit, 89 m (291
ft) north of bench mark 7283 A 1982, 47 m (153 ft) east of the east edge of the
runway, 12.98 m (42.6 ft) east of the centerline of the gravel road paralleling
runway 18-36, 12 m (41 ft) NW of the centerline of the gravel road leading to
the burning pit, and 0.15 m (0.5 ft) NW of an orange witness post. The bench
mark is crimped to the top of a galvanized steel rod, driven 3.0 m (10 ft), and
encased in a 4-inch ABS pipe with cover.
BENCH MARK STAMPING: TIDAL 22 1974
DESIGNATION: 945 7283 TIDAL 22
MONUMENTATION: Tidal Station disk VM#: 11695
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 57° 44.7' N ( 57.74500) LONGITUDE: 152° 29.0' W (-152.48300)
The bench mark is a disk set in the SE corner of a 1 m (2 ft) square concrete
foundation of the sixth runway light located NW of the SE corner of Runway
18-36, 25 m (83 ft) SE of the centerline of the runway, and 4.72 m (15.5 ft)
north of the southern-most one of seven 0.15 m (0.5 ft) diameter metal guard
rail posts that are on the NW side of the road that parallels the runway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 9
Station ID: 9457283 PUBLICATION DATE: 01/10/2005
Name: KODIAK, ST PAULS HARBOR
AK
NOAA Chart: 16596 Latitude: 57° 44.7' N ( 57.74500)
USGS Quad: WOMENS BAY Longitude: 152° 29.0' W (-152.48300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7283 C 1982
DESIGNATION: 945 7283 TIDAL C
MONUMENTATION: Tidal Station disk VM#: 11696
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 57° 44.7' N ( 57.74500) LONGITUDE: 152° 29.0' W (-152.48300)
The bench mark is a disk located on the east side of the gravel road paralleling
runway 18-36, 77 m (253 ft) south of bench mark 7283 A 1982, 51.66 m (169.5 ft)
east of the east edge of runway 18-36, 15.61 m (51.2 ft) west of a wire fence
surrounding the sewer treatment plant, 8.47 m (27.8 ft) east of the centerline
of the gravel road paralleling runway 18-36, and 0.15 m (0.5 ft) west of an
orange witness post. The bench mark is crimped to the top of a galvanized steel
rod driven 4 m (12 ft), and encased in a 4-inch ABS pipe with cover.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 9
Station ID: 9457283 PUBLICATION DATE: 01/10/2005
Name: KODIAK, ST PAULS HARBOR
AK
NOAA Chart: 16596 Latitude: 57° 44.7' N ( 57.74500)
USGS Quad: WOMENS BAY Longitude: 152° 29.0' W (-152.48300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: USN 58
DESIGNATION: BM 58
MONUMENTATION: Bench Mark disk VM#: 11697
AGENCY: US Navy (USN) IDB PID#:
SETTING CLASSIFICATION: Concrete manhole foundation OPUS PID:
LATITUDE: 57° 44.8' N ( 57.74670) LONGITUDE: 152° 29.3' W (-152.48800)
The bench mark is a disk set in the north corner of the concrete foundation for
an electrical manhole located near the central section of the Kodiak Airport,
and 46 m (150 ft) west of the intersection of runways 10-28 and 18-36.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 9
Station ID: 9457283 PUBLICATION DATE: 01/10/2005
Name: KODIAK, ST PAULS HARBOR
AK
NOAA Chart: 16596 Latitude: 57° 44.7' N ( 57.74500)
USGS Quad: WOMENS BAY Longitude: 152° 29.0' W (-152.48300)
T I D A L D A T U M S
Tidal datums at KODIAK, ST PAULS HARBOR based on:
LENGTH OF SERIES: 2 YEARS
TIME PERIOD: October 1982 - September 1984
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9451600 SITKA, BARONOF ISLAND, SITKA SOUND
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (12/10/1965) = 4.086
MEAN HIGHER HIGH WATER MHHW = 2.652
MEAN HIGH WATER MHW = 2.370
MEAN TIDE LEVEL MTL = 1.357
MEAN SEA LEVEL MSL = 1.356
MEAN LOW WATER MLW = 0.343
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (12/22/1982) = -0.938
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 14 1964 4.606 2.236
NO 15 1964 9.351 6.981
NO 16 1964 6.353 3.983
NO 19 1971 5.127 2.757
NO 20 1972 5.166 2.796
TIDAL 21 1974 10.524 8.154
7283 A 1982 9.634 7.264
7283 B 1982 10.487 8.117
TIDAL 22 1974 10.701 8.331
7283 C 1982 10.450 8.080
USN 58 9.436 7.066
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 9
Station ID: 9457283 PUBLICATION DATE: 01/10/2005
Name: KODIAK, ST PAULS HARBOR
AK
NOAA Chart: 16596 Latitude: 57° 44.7' N ( 57.74500)
USGS Quad: WOMENS BAY Longitude: 152° 29.0' W (-152.48300)
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.