U.S. DEPARTMENT OF COMMERCE
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National Ocean Service
Datums Page Page 1 of 12
Station ID: 9457292 PUBLICATION DATE: 02/16/2018
Name: KODIAK ISLAND, WOMENS BAY
AK
NOAA Chart: 16596 Latitude: 57° 43.8' N ( 57.73028)
USGS Quad: KODIAK C-2 Longitude: 152° 30.8' W (-152.51389)
To reach the tidal bench marks from Kodiak Airport, turn south on Alaska Highway
for 2.6 km (1.6 mi) to the U.S. Coast Guard Support Center, enter through the
main gate and proceed east for 0.6 km (0.4 mi) until a taxi way for planes and
helicopters is crossed. Then turn south and go 1.3 km (0.8 mi) to the north
cargo pier. The bench marks are located on the Support Center grounds. The
tide gage and staff are located on the SE portion of the north cargo pier, west
of building #614, and adjacent to blue building #N7.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 7292 B 1984
DESIGNATION: 945 7292 B
MONUMENTATION: Tidal Station disk VM#: 1613
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Rock outcrop OPUS PID:
LATITUDE: 57° 43.8' N ( 57.72997) LONGITUDE: 152° 30.7' W (-152.51169)
The primary bench mark is a disk set horizontally in the northern end of a
bedrock outcrop which parallels Storis Dr., E of building #614, 65.50 m (214.90
ft) SSW from light pole W3 located in the SSW parking lot of building N-73,
13.69 m (44.91 ft) NE of red fire hydrant #04, 6.70 m (22.0 ft) ESE from the
centerline of the road, 0.60 m (2.0 ft) SE of an orange witness post, and 0.8 m
(2.7 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 12
Station ID: 9457292 PUBLICATION DATE: 02/16/2018
Name: KODIAK ISLAND, WOMENS BAY
AK
NOAA Chart: 16596 Latitude: 57° 43.8' N ( 57.73028)
USGS Quad: KODIAK C-2 Longitude: 152° 30.8' W (-152.51389)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: POWER HO 116.653 1945 USN
DESIGNATION: 945 7292 POWER HOUSE USN
ALIAS: 945 7292 TIDAL 10
MONUMENTATION: Bench Mark disk VM#: 1607
AGENCY: US Navy (USN) IDB PID#: TT4495
SETTING CLASSIFICATION: Concrete base OPUS PID:
LATITUDE: 57° 43.9' N ( 57.73214) LONGITUDE: 152° 30.4' W (-152.50708)
The bench mark is a disk set in the SW corner of an unknown sized concrete pad,
14.00 m (45.9 ft) east of the centerline of Storis Drive, 8.9 m (29.20 ft)south
of a two inch diameter Stainless Steel monitoring well surrounded by three
yellow poles, and 5.50 m (18.0 ft) west of the middle of the west wall of
Building #12 (the old Power House Plant).
BENCH MARK STAMPING: WOMENS BAY NO 6 1949
DESIGNATION: 945 7292 WOMENS BAY 6
MONUMENTATION: Tidal Station disk VM#: 1608
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: TT4499
SETTING CLASSIFICATION: Rock outcrop OPUS PID:
LATITUDE: 57° 43.3' N ( 57.72239) LONGITUDE: 152° 30.3' W (-152.50583)
The bench mark is a disk set vertically in the face of a rock outcrop on the
U.S. Coast Guard Base near some foundation ruins along Seafarer Drive, 36 m (118
ft) SW of the SW corner of the foundation ruins on east side of Seafarer Drive,
30.48 m (100.0 ft) NNE of a storm drain on the east side of the road, 14.63 m
(48.0 ft) east of the centerline of the road, 13.72 m (45.0 ft) north of
telephone pole # 62, 4.42 m (14.5 ft) east of an orange witness post, and 0.76 m
(2.5 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 12
Station ID: 9457292 PUBLICATION DATE: 02/16/2018
Name: KODIAK ISLAND, WOMENS BAY
AK
NOAA Chart: 16596 Latitude: 57° 43.8' N ( 57.73028)
USGS Quad: KODIAK C-2 Longitude: 152° 30.8' W (-152.51389)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: TIDAL 23 1974
DESIGNATION: 945 7292 TIDAL 23
MONUMENTATION: Tidal Station disk VM#: 1610
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete slab OPUS PID:
LATITUDE: 57° 43.6' N ( 57.72703) LONGITUDE: 152° 30.9' W (-152.51481)
The bench mark is a disk set vertically in the NW corner of a concrete
foundation near a water valve w/sign that reads "fw valve 78" on the SE side of
Storis Drive across the street from Building No. 621, 36.7 m (120.41 ft) east of
light pole W24, 14.5 m (47.57 ft) south of utility pole X622, 3.90 m (12.8 ft)
north of the SW corner of the foundation, 0.10 m (0.4 ft) SE of the NW corner of
the foundation, and 0.60 m (2.0 ft) above ground level.
BENCH MARK STAMPING: TIDAL 24 1974
DESIGNATION: 945 7292 TIDAL 24
MONUMENTATION: Tidal Station disk VM#: 1611
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete loading dock OPUS PID:
LATITUDE: 57° 43.8' N ( 57.73053) LONGITUDE: 152° 30.7' W (-152.51178)
The bench mark is a disk set in the easterly end of a concrete loading dock at
the top of the ramp at the NE end of Building No. 614 on the U.S. Coast Guard
Base, 23.71 m (77.8 ft) SW of a yellow fire plug, 2.00 m (6.7 ft) north of the
north side of the building, 0.50 m (1.5 ft) SE of the easternmost of two 0.80 m
(2.5 ft) tall yellow concrete posts, and 1.20 m (4.0 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 12
Station ID: 9457292 PUBLICATION DATE: 02/16/2018
Name: KODIAK ISLAND, WOMENS BAY
AK
NOAA Chart: 16596 Latitude: 57° 43.8' N ( 57.73028)
USGS Quad: KODIAK C-2 Longitude: 152° 30.8' W (-152.51389)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7292 C 1984
DESIGNATION: 945 7292 C
MONUMENTATION: Tidal Station disk VM#: 1614
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Rock outcrop OPUS PID:
LATITUDE: 57° 43.5' N ( 57.72500) LONGITUDE: 152° 31.0' W (-152.51658)
The bench mark is a disk set in a bedrock outcrop south of fuel pier and east of
Storis Drive, 45.80 m (150.26 ft) E of the sign post at the junction of Storis
Drive and Tillamook Rock Cut Off Road, 40.00 m south of a horizontal metal grate
leading into a culvert on the east side of Storis Drive, 29.90 m (98.0 ft) SE of
the centerline of Storis Drive, 1.80 m (6.0 ft) east of the NW corner of the
bedrock outcrop, and 0.70 m (2.3 ft) above ground level.
BENCH MARK STAMPING: 7292 D 1984
DESIGNATION: 945 7292 D
MONUMENTATION: Tidal Station disk VM#: 1615
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Rock outcrop OPUS PID:
LATITUDE: 57° 43.4' N ( 57.72339) LONGITUDE: 152° 31.2' W (-152.52056)
The bench mark is a disk set in a bedrock outcrop ledge adjacent to the north
end of the old dilapidated Marginal Wharf, 42.00 m (137.8 ft) NE of the
northern-most access to Marginal Wharf, 15.40 m (50.52 ft) north of a concrete
culvert on the east side of Storis Drive, 12.21 m (40.05 ft) west of power pole
#5, 7.00 m (23.0 ft) SE of the centerline of Storis Drive, and 1.00 m (3.0 ft)
above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 12
Station ID: 9457292 PUBLICATION DATE: 02/16/2018
Name: KODIAK ISLAND, WOMENS BAY
AK
NOAA Chart: 16596 Latitude: 57° 43.8' N ( 57.73028)
USGS Quad: KODIAK C-2 Longitude: 152° 30.8' W (-152.51389)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7292 F 2004
DESIGNATION: 945 7292 F
MONUMENTATION: Tidal Station disk VM#: 17682
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete step OPUS PID:
LATITUDE: 57° 44.0' N ( 57.73372) LONGITUDE: 152° 30.3' W (-152.50461)
The bench mark is a disk set in the bottom step of the entrance to the Northern
Lights Recreation Facility (Bldg. 2) on the east side of Seafarer Drive on the
USCG station, 9.40 m (30.8 ft) east of the centerline of Seafarer Drive, 3.90 m
(12.8 ft) west of the southernmost of two southern entrances to the recreation
facility, 3.10 m (10.2 ft) south of the north side of the stairs, and 0.15 m
(0.5 ft) north of the south side of the stairs.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 12
Station ID: 9457292 PUBLICATION DATE: 02/16/2018
Name: KODIAK ISLAND, WOMENS BAY
AK
NOAA Chart: 16596 Latitude: 57° 43.8' N ( 57.73028)
USGS Quad: KODIAK C-2 Longitude: 152° 30.8' W (-152.51389)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: KODIAK MON 7278
MONUMENTATION: Metal Rod VM#: 17960
AGENCY: National Geodetic Survery (NGS) IDB PID#: TT4632
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: TT4632
LATITUDE: 57° 44.4' N ( 57.73997) LONGITUDE: 152° 29.8' W (-152.49719)
The bench mark is set in bedrock on the USCG Base in Kodiak, 9.72 m (31.9 ft)
north of benchmark 9457292 MON 7278 RM2, 9.08 m (29.8 ft) SSE of the SW corner
of a concrete foundation 4.57 m (15.0 ft) square, 8.78 m (28.8 ft) SSW of the SE
corner of the same square concrete foundation, and 4.91 m (16.1 ft) SW from the
SW corner of another concrete foundation. The bench mark is recessed 0.10 m (0.3
ft) below the bedrock surface being the top of a stainless steel rod with datum
cap and encased in a 1-inch diameter PVC pipe. NOTE - Bench mark is located in a
restricted area.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 12
Station ID: 9457292 PUBLICATION DATE: 02/16/2018
Name: KODIAK ISLAND, WOMENS BAY
AK
NOAA Chart: 16596 Latitude: 57° 43.8' N ( 57.73028)
USGS Quad: KODIAK C-2 Longitude: 152° 30.8' W (-152.51389)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: KOD. APT. C23
DESIGNATION: ADQ C23
MONUMENTATION: Survey disk VM#: 17961
AGENCY: National Geodetic Survey (NGS) IDB PID#: AC7801
SETTING CLASSIFICATION: Unspecified pipe OPUS PID:
LATITUDE: 57° 44.8' N ( 57.74670) LONGITUDE: 152° 29.2' W (-152.48700)
The bench mark is a disk located in the SE quadrant of the intersection of
runways 18-36 and 10-28, 61 m (200 ft) south of the curve to the east in the
service road, 54 m (176 ft) east of the east edge of runway 18-36, and 14 m (45
ft) east of the CL of the service road along the east side of runway 18-36. The
bench mark is a disk crimped to unspecified rod driven to an unspecified depth,
encased in a plastic pipe projecting slightly above ground.
BENCH MARK STAMPING: RM2
DESIGNATION: 945 7292 MON 7278 RM2
ALIAS:
MONUMENTATION: Tidal Station disk VM#: 19238
AGENCY: National Geodetic Survey (NGS) IDB PID#:
SETTING CLASSIFICATION: Bedrock OPUS PID:
LATITUDE: 57° 44.4' N ( 57.73989) LONGITUDE: 152° 29.8' W (-152.49731)
The bench mark is a disk set in the 6.5 m x 4.0 m (21.3 ft x 13.1 ft) exposed
portion a rock outcrop, 9.72 m (31.9 ft) north of benchmark 9457292 MON 7278,
8.5 m (27.9 ft) west of the centerline of a trail, 1.9 m (6.2 ft) south of the
north edge the rock outcrop, 1.2 m (3.9 ft) east of the west edge of the
outcrop, and recessed 0.02 m (0.1 ft) into the outcrop. NOTE - Bench mark is
located in a restricted area.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 12
Station ID: 9457292 PUBLICATION DATE: 02/16/2018
Name: KODIAK ISLAND, WOMENS BAY
AK
NOAA Chart: 16596 Latitude: 57° 43.8' N ( 57.73028)
USGS Quad: KODIAK C-2 Longitude: 152° 30.8' W (-152.51389)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 945 7292 Unstamped
ALIAS:
MONUMENTATION: Survey disk VM#: 19239
AGENCY: Unkown IDB PID#:
SETTING CLASSIFICATION: Concrete pedestal OPUS PID:
LATITUDE: 57° 44.1' N ( 57.73533) LONGITUDE: 152° 30.2' W (-152.50308)
The bench mark is a disk set on top of a 3.10 m x 1.53 m x 0.84 m (10.2 ft x 5.0
ft x 2.8 ft) concrete pedestal, 22.32 m (73.2 ft) SW of the SW corner of a one
story yellow with blue trim building, 10.19 m (33.4 ft) NW of a cyclone fence,
7.80 m (25.6 ft) SE of a red fire plug which is surrounded by four yellow
bollards, 0.78 m (2.6 ft) SW or of the north edge of the concrete block, 0.71 m
(2.3 ft) SE of the NW edge of the concrete block and projects 0.005 m (0.02 ft)
above the concrete block.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 12
Station ID: 9457292 PUBLICATION DATE: 02/16/2018
Name: KODIAK ISLAND, WOMENS BAY
AK
NOAA Chart: 16596 Latitude: 57° 43.8' N ( 57.73028)
USGS Quad: KODIAK C-2 Longitude: 152° 30.8' W (-152.51389)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7292 A 2003
DESIGNATION: 945 7292 A
ALIAS: RESET
MONUMENTATION: Tidal Station disk VM#: 21015
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete bull rail OPUS PID:
LATITUDE: 57° 43.8' N ( 57.73022) LONGITUDE: 152° 30.8' W (-152.51353)
The bench mark is a disk set in the SE corner of the concrete bullrail of the
southwestern-most causeway to the cargo pier on the U.S. Coast Guard Base, 23.0
m (75.5 ft) NW the NW corner of Servmart Building #614, 13.0 m (42.7 ft) SE from
red fire hydrant #107, and 0.30 m (1.0 ft) NW from the SE end of the bullrail.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 10 of 12
Station ID: 9457292 PUBLICATION DATE: 02/16/2018
Name: KODIAK ISLAND, WOMENS BAY
AK
NOAA Chart: 16596 Latitude: 57° 43.8' N ( 57.73028)
USGS Quad: KODIAK C-2 Longitude: 152° 30.8' W (-152.51389)
T I D A L D A T U M S
Tidal datums at KODIAK ISLAND, WOMENS BAY based on:
LENGTH OF SERIES: 17 YEARS
TIME PERIOD: Jan '85 - Dec '01 & Jan '12 - Dec '16
TIDAL EPOCH: 2012-2016
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (12/31/1986) = 4.143
MEAN HIGHER HIGH WATER MHHW = 2.675
MEAN HIGH WATER MHW = 2.400
MEAN SEA LEVEL MSL = 1.372
MEAN TIDE LEVEL MTL = 1.367
MEAN LOW WATER MLW = 0.335
North American Vertical Datum NAVD88 = 0.268
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (12/14/2008) = -1.179
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
7292 B 1984 6.422 4.022
POWER HO 116.653 1945 USN 4.513 2.113
WOMENS BAY NO 6 1949 4.580 2.180
TIDAL 23 1974 6.760 4.360
TIDAL 24 1974 7.016 4.616
7292 C 1984 6.640 4.240
7292 D 1984 4.508 2.108
7292 F 2004 8.476 6.076
KODIAK MON 7278 19.831 17.431
KOD. APT. C23 9.649 7.249
RM2 20.044 17.644
945 7292 Unstamped 6.749 4.349
7292 A 2003 6.466 4.066
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 11 of 12
Station ID: 9457292 PUBLICATION DATE: 02/16/2018
Name: KODIAK ISLAND, WOMENS BAY
AK
NOAA Chart: 16596 Latitude: 57° 43.8' N ( 57.73028)
USGS Quad: KODIAK C-2 Longitude: 152° 30.8' W (-152.51389)
Foot Notes:
Bench mark KOD. APT. C23 is based on one differential leveling connection and
does not meet the quality control standards of the NOS. Therefore, caution
should be used when deriving elevations for this mark.
Certain geographic areas are experiencing rapid land movement due to uplift or
subsidence, which results in anomalous relative sea level trends compared to
most other coastal regions in the United States
(http://tidesandcurrents.noaa.gov/sltrends/index.shtml). In these areas, NOAA
has adopted a modified procedure for computing accepted tidal datums for the
National Water Level Observation Network (NWLON). The long-term control stations
in these areas have tidal datums reviewed approximately every 5 years, and if
they meet the criteria for an update, the 5-year period used for the modified
procedure will be listed in the Time Period section for the datums. The adoption
of this procedure was necessary to ensure that these tidal datums accurately
represent the existing stand of sea level relative to the land. A detailed
report explaining this modified procedure can be found in the publications
section of the CO-OPS Tides & Currents website at
http://tidesandcurrents.noaa.gov/pub.html.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 12 of 12
Station ID: 9457292 PUBLICATION DATE: 02/16/2018
Name: KODIAK ISLAND, WOMENS BAY
AK
NOAA Chart: 16596 Latitude: 57° 43.8' N ( 57.73028)
USGS Quad: KODIAK C-2 Longitude: 152° 30.8' W (-152.51389)
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.