U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 9452611 PUBLICATION DATE: 05/19/2010
Name: PELICAN HARBOR, LISIANSKI INLET
AK
NOAA Chart: 17303 Latitude: 57° 57.5' N ( 57.95778)
USGS Quad: SITKA (D-7) Longitude: 136° 13.6' W (-136.22678)
To reach the tide station from the top of the ramp to the Pelican Harbor
floating dock travel NNE 18.0 m (59.00 ft) and turn ESE onto the main boardwalk
"Salmon Way", continue southeasterly 228.0 m (748.00 ft) and turn right onto the
gravel road "Clam Street", and then travel southwesterly on "Clam Street" 205.0
m (673.00 ft) to the Alaska Marine Highway Ferry Dock. The tide house was near
the base of the ferry dock and the tidal bench marks are located along the
boardwalk and road to the ferry dock.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 2611 D 1989
DESIGNATION: 945 2611 D
MONUMENTATION: Tidal Station disk VM#: 14503
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Bedrock OPUS PID:
LATITUDE: 57° 57.6' N ( 57.96045) LONGITUDE: 136° 13.7' W (-136.22813)
The primary bench mark is set in bedrock behind a house on the north side of the
boardwalk near a stream, 17.20 m (56.4 ft) NNE of centerline of the boardwalk,
4.74 m (15.6 ft) east of a stairway running north from the boardwalk to a house,
2.69 m (8.8 ft) east of centerline of a small stream bed and 1.74 m (5.7 ft)
north of NW corner of a peach colored J&S Lodging building.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 9452611 PUBLICATION DATE: 05/19/2010
Name: PELICAN HARBOR, LISIANSKI INLET
AK
NOAA Chart: 17303 Latitude: 57° 57.5' N ( 57.95778)
USGS Quad: SITKA (D-7) Longitude: 136° 13.6' W (-136.22678)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2611 C 1989
DESIGNATION: 945 2611 C
MONUMENTATION: Tidal Station disk VM#: 14502
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete slab OPUS PID:
LATITUDE: 57° 57.6' N ( 57.96049) LONGITUDE: 136° 13.8' W (-136.23022)
The bench mark is set in the NE corner of a 1.55 m x 1.55 m (5.1 ft x 5.1 ft)
concrete pad at the base of the stairs on the east side of the cold storage
housing building, 15.10 m (49.5 ft) NNW of the centerline of the boardwalk,
12.79 m (42.0 ft) NNW of power pole number A11, 10.69 m (35.1 ft) WSW of the
southwestern corner of the Pelican Town Hall building, 3.60 m (11.8 ft) WSW of
the centerline of a gravel road running north from the boardwalk, 0.21 m (0.7
ft) west of the eastern edge of concrete and 0.14 m (0.5 ft) south of the north
edge of concrete.
BENCH MARK STAMPING: 2611 F 2009
DESIGNATION: 945 2611 F
MONUMENTATION: Tidal Station disk VM#: 19570
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Boulder OPUS PID:
LATITUDE: 57° 57.6' N ( 57.95959) LONGITUDE: 136° 13.6' W (-136.22603)
The bench mark is set in the top of a 4.1 m x 1.5 m x 2.2 m (13.5 ft x 4.9 ft x
7.2 ft) boulder north of the boardwalk, 9.90 m (32.5 ft) NE of the base of the
short section of boardwalk that runs NE to SW connecting the main boardwalk to a
new house with steel pilings, 9.01 m (29.6 ft) north of a green fire hose
connection point along railing of boardwalk and 4.50 m (14.8 ft) NE of the NE
edge of boardwalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 9452611 PUBLICATION DATE: 05/19/2010
Name: PELICAN HARBOR, LISIANSKI INLET
AK
NOAA Chart: 17303 Latitude: 57° 57.5' N ( 57.95778)
USGS Quad: SITKA (D-7) Longitude: 136° 13.6' W (-136.22678)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2611 G 2009
DESIGNATION: 945 2611 G
MONUMENTATION: Tidal Station disk VM#: 19571
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete structure OPUS PID:
LATITUDE: 57° 57.5' N ( 57.95892) LONGITUDE: 136° 13.5' W (-136.22469)
The bench mark is set in a 2.10 m (6.9 ft) diameter concrete water sewer access
point in the dirt roadway leading SW from the boardwalk to the ferry dock, 17.03
m (55.9 ft) WSW of power pole AB1, 12.10 m (39.7 ft) SW of the centerline of the
boardwalk, 1.98 m (6.5 ft) SE from the NW edge of the concrete and 0.12 m (0.4
ft) NW from the SE edge of the concrete.
BENCH MARK STAMPING: 2611 H 2009
DESIGNATION: 945 2611 H
MONUMENTATION: Tidal Station disk VM#: 19572
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Rock OPUS PID:
LATITUDE: 57° 57.5' N ( 57.95811) LONGITUDE: 136° 13.6' W (-136.22598)
The bench mark is set flush in the top of a large buried rock near the base of
the wooden pier to the public dry dock grid NE of the ferry dock, 7.12 m (23.4
ft) WNW of the centerline of the dirt road to the ferry dock, 4.43 m (14.5 ft)
ESE of the yellow fiberglass and treated wood stairway to the pier, 2.64 m (8.7
ft) NNE of the centerline of the base of the pier and 0.57 m (1.9 ft) below road
level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 9452611 PUBLICATION DATE: 05/19/2010
Name: PELICAN HARBOR, LISIANSKI INLET
AK
NOAA Chart: 17303 Latitude: 57° 57.5' N ( 57.95778)
USGS Quad: SITKA (D-7) Longitude: 136° 13.6' W (-136.22678)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2611 J 2009
DESIGNATION: 945 2611 J
MONUMENTATION: Tidal Station disk VM#: 19573
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete deck OPUS PID#: BBBQ33
LATITUDE: 57° 57.5' N ( 57.95770) LONGITUDE: 136° 13.6' W (-136.22729)
The bench mark is set in the NE corner of the concrete deck of the ferry dock,
48.06 m (157.7 ft) NNE of bench mark 945 2611 K, 30.42 m (99.8 ft) ENE of the
western edge of the dock, 11.43 m (37.5 ft) west of the wooden power pole with
antennas, 0.77 m (2.5 ft) south of the northern edge of concrete and 0.51 m (1.7
ft) west of the eastern edge of concrete.
BENCH MARK STAMPING: 2611 K 2009
DESIGNATION: 945 2611 K
MONUMENTATION: Tidal Station disk VM#: 19574
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Rock OPUS PID:
LATITUDE: 57° 57.4' N ( 57.95726) LONGITUDE: 136° 13.6' W (-136.22712)
The bench mark is set in the top of a 1.7 m x 1.0 m x 0.7 m (5.6 ft x 3.3 ft x
2.3 ft) rock interlocked into the top of the rip-rap jetty running SW from the
ferry dock, 48.06 m (157.7 ft) SSW of bench mark 945 2611 J, 25.90 m (85.0 ft)
SW of the base of the jetty, 9.40 m (30.8 ft) NW of the SE base of the rip-rap,
3.70 m (12.1 ft) SE of the NW base of the rip-rap and 2.10 m (6.9 ft) above the
top of the beach.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 9452611 PUBLICATION DATE: 05/19/2010
Name: PELICAN HARBOR, LISIANSKI INLET
AK
NOAA Chart: 17303 Latitude: 57° 57.5' N ( 57.95778)
USGS Quad: SITKA (D-7) Longitude: 136° 13.6' W (-136.22678)
T I D A L D A T U M S
Tidal datums at PELICAN HARBOR, LISIANSKI INLET based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: November 2009 - December 2009
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:
MEAN HIGHER HIGH WATER MHHW = 3.234
MEAN HIGH WATER MHW = 2.963
MEAN TIDE LEVEL MTL = 1.704
MEAN SEA LEVEL MSL = 1.698
MEAN LOW WATER MLW = 0.444
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
2611 D 1989 6.286 3.323
2611 C 1989 6.625 3.661
2611 F 2009 3.681 0.717
2611 G 2009 5.919 2.956
2611 H 2009 5.202 2.239
2611 J 2009 5.366 2.403
2611 K 2009 6.016 3.053
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 9452611 PUBLICATION DATE: 05/19/2010
Name: PELICAN HARBOR, LISIANSKI INLET
AK
NOAA Chart: 17303 Latitude: 57° 57.5' N ( 57.95778)
USGS Quad: SITKA (D-7) Longitude: 136° 13.6' W (-136.22678)
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.