U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 9465831 PUBLICATION DATE: 01/25/2011
Name: QUINHAGAK (KWINAK), KUSHKOKWIN RIVER
AK
NOAA Chart: 16300 Latitude: 59° 45.0' N ( 59.75055)
USGS Quad: GOODNEWS BAY C-8 Longitude: 161° 54.9' W (-161.91544)
To reach the bench marks from the airport, proceed 1.6 km (1.0 mi) along Airport
Road (Quinhagak Drive) to Mission Road, turn right on Mission Road and proceed
0.3 km (0.2 mi) NW to the station at the old village site. The bench marks are
along the west side of Mission Road which leads to the old village site and on
the north side of the road to the airport. The tide gauge was housed at the
north end of Mission Road just south of the Kanetok River.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 5831 A 2010
DESIGNATION: 946 5831 A
MONUMENTATION: Tidal Station disk VM#: 19632
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 59° 44.9' N ( 59.74844) LONGITUDE: 161° 54.7' W (-161.91089)
The primary bench mark is a stainless steel rod set on the north side of
Quinhagak Drive, 131.8 m (432.4 ft) SE of bench mark 946 5831 B, 27.30 m (89.6
ft) NNW of the centerline of Quinhagak Drive, 5.60 m (18.4 ft) SW of the
centerline of the road leading to the old village, and 2.33 m (7.6 ft) south of
power pole D13-13-A. The datum point is set 0.20 m (0.7 ft) below grade, being
the top of a rounded off stainless steel rod driven 7.3 m (24 ft) to refusal and
encased in a 0.18 m (0.6 ft) diameter aluminum NGS logo cover.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 9465831 PUBLICATION DATE: 01/25/2011
Name: QUINHAGAK (KWINAK), KUSHKOKWIN RIVER
AK
NOAA Chart: 16300 Latitude: 59° 45.0' N ( 59.75055)
USGS Quad: GOODNEWS BAY C-8 Longitude: 161° 54.9' W (-161.91544)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5831 B 2010
DESIGNATION: 946 5831 B
MONUMENTATION: Tidal Station disk VM#: 19657
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 59° 44.9' N ( 59.74875) LONGITUDE: 161° 54.8' W (-161.91317)
The bench mark is a stainless steel rod set on the west side of the north bound
gravel road leading to the old village, 131.8 m (432.4 ft) NW of bench mark 946
5831 A, 71.44 m (234.4 ft) SE of bench mark 946 5831 C, 49.25 m (ft) west of the
centerline the gravel road, 8.03 m (26.3 ft) south of power pole with light
number Q2-2, and 5.05 m (16.6 ft) west of the edge of the gravel road. The datum
point is set 0.20 m (0.7 ft) below grade, being the top of a rounded off
stainless steel rod driven 8.5 m (28 ft) to refusal and encased in a 0.18 m (0.6
ft) diameter aluminum NGS logo cover.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 9465831 PUBLICATION DATE: 01/25/2011
Name: QUINHAGAK (KWINAK), KUSHKOKWIN RIVER
AK
NOAA Chart: 16300 Latitude: 59° 45.0' N ( 59.75055)
USGS Quad: GOODNEWS BAY C-8 Longitude: 161° 54.9' W (-161.91544)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5831 C 2010
DESIGNATION: 9465831 C
MONUMENTATION: Tidal Station disk VM#: 19658
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 59° 45.0' N ( 59.74922) LONGITUDE: 161° 54.8' W (-161.91406)
The bench mark is set on the west side of the north bound gravel road leading to
the old village, 80.52 m (264.2 ft) SE of bench mark 9463 5831 D, 71.44 m (234.4
ft) NW of bench mark 946 5831 B, 10.89 m (35.7 ft) WNW of power pole number B-20
Q2-3, 6.95 m (22.8 ft) west of the centerline of the gravel road, and 2.80 m
(9.2 ft) west of the edge of the gravel road. The datum point is set 0.20 m (0.7
ft) below grade, being the top of a rounded off stainless steel rod driven 8.5 m
(28 ft) to refusal and encased in a 0.16 m (0.6 ft) diameter aluminum NGS logo
cover.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 9465831 PUBLICATION DATE: 01/25/2011
Name: QUINHAGAK (KWINAK), KUSHKOKWIN RIVER
AK
NOAA Chart: 16300 Latitude: 59° 45.0' N ( 59.75055)
USGS Quad: GOODNEWS BAY C-8 Longitude: 161° 54.9' W (-161.91544)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5831 D 2010
DESIGNATION: 946 5831 D
MONUMENTATION: Tidal Station disk VM#: 19659
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 59° 45.0' N ( 59.74983) LONGITUDE: 161° 54.9' W (-161.91478)
The bench mark is set on the west side of the north bound gravel road leading to
the old village, 80.52 m (264.2 ft) NW of bench mark 946 5831 C, 63.89 m (209.6
ft) SE of bench mark 946 5831 E, 30.52 m (100.1 ft) NNW of power pole number
B21, 37.54 m (123.2 ft) SE of power pole number Q2 3B, 6.85 m (22.5 ft) WSW of
the centerline of a small fork in the old village road, and 1.75 m (5.7 ft) west
of the edge of the gravel road. The datum point is set 0.14 m (0.5 ft) below
grade, being the top of a rounded off stainless steel rod driven 8.5 m (28 ft)
to refusal and encased in a 0.16 m (0.6 ft) diameter aluminum NGS logo cover.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 9465831 PUBLICATION DATE: 01/25/2011
Name: QUINHAGAK (KWINAK), KUSHKOKWIN RIVER
AK
NOAA Chart: 16300 Latitude: 59° 45.0' N ( 59.75055)
USGS Quad: GOODNEWS BAY C-8 Longitude: 161° 54.9' W (-161.91544)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5831 E 2010
DESIGNATION: 946 5831 E
MONUMENTATION: Tidal Station disk VM#: 19660
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: BBCC59
LATITUDE: 59° 45.0' N ( 59.75036) LONGITUDE: 161° 54.9' W (-161.91528)
The bench mark is set on the west side of the north bound gravel road leading to
the old village, 63.89 m (209.6 ft) NW of bench mark 946 5831 D, 29.35 m (96.3
ft) SE of the top of bluff which leads down to the river at the end of the old
village, 27.37 m (89.8 ft) NW of power pole number Q2 3B, 5.65 m (18.5 ft) west
of the centerline of the old village road, and 1.68 m (5.5 ft) west of the edge
of the gravel road. The datum point is set 0.09 m (0.3 ft) below grade, being
the top of a rounded off stainless steel rod driven 8.5 m (28 ft) to refusal and
encased in a 0.16 m (0.6 ft) diameter aluminum NGS logo cover.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 9465831 PUBLICATION DATE: 01/25/2011
Name: QUINHAGAK (KWINAK), KUSHKOKWIN RIVER
AK
NOAA Chart: 16300 Latitude: 59° 45.0' N ( 59.75055)
USGS Quad: GOODNEWS BAY C-8 Longitude: 161° 54.9' W (-161.91544)
T I D A L D A T U M S
Tidal datums at QUINHAGAK (KWINAK), KUSHKOKWIN RIVER based on:
LENGTH OF SERIES: 4 MONTHS
TIME PERIOD: June 2010 - September 2010
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 3.636
MEAN HIGH WATER MHW = 2.954
MEAN SEA LEVEL MSL = 1.661
MEAN TIDE LEVEL MTL = 1.578
MEAN LOW WATER MLW = 0.203
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
5831 A 2010 7.256 4.302
5831 B 2010 6.289 3.335
5831 C 2010 5.921 2.967
5831 D 2010 6.039 3.085
5831 E 2010 6.098 3.144
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 9465831 PUBLICATION DATE: 01/25/2011
Name: QUINHAGAK (KWINAK), KUSHKOKWIN RIVER
AK
NOAA Chart: 16300 Latitude: 59° 45.0' N ( 59.75055)
USGS Quad: GOODNEWS BAY C-8 Longitude: 161° 54.9' W (-161.91544)
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.