U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 9417426 PUBLICATION DATE: 06/30/2014
Name: NOYO HARBOR
CA
NOAA Chart: Latitude: 39° 25.5' N ( 39.42578)
USGS Quad: Longitude: 123° 48.3' W (-123.80511)
To reach the tide station from the intersection of US Highway 1 and Noyo Point
Road in Fort Bragg, CA, proceed E on Noyo Point Road for 0.26 km (0.16 mi), then
veer right at fork onto N Harbor Drive and go 0.74 km (0.46 mi). The tide
station was located on a pier E of the California Department of Fish and Game
building, 16.97 m (55.68ft) S of the NW corner of pier, 22.12 m (72.57 ft) NW of
the NW corner of the California Department of Fish and Game building, 3.47 m
(11.38 ft) SW of the SW corner of large opening in pier, and 4.48 m (14.70 ft) N
of crane. Special use permit or authorization is required to access the tide
station.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 941 7426A F&G
DESIGNATION: 941 7426A F&G
MONUMENTATION: Tidal Station disk VM#: 20978
AGENCY: US Army Corps of Engineers IDB PID#:
SETTING CLASSIFICATION: Concrete curb OPUS PID#: BBCN82
LATITUDE: 39° 25.5' N ( 39.42544) LONGITUDE: 123° 48.3' W (-123.80481)
The primary benchmark is a 4 disk located in the California Department of Fish
and Game S parking lot, 58.61 m (192.28 ft) W of the centerline of N Harbor
Drive, 23.56 m (77.29 ft) WSW of the SE corner of the California Department of
Fish and Game building, 15.42 m (50.58 ft) SE of the SW corner of the California
Department of Fish and Game building, and 31.51 m (103.37 ft) E of the SW corner
of pier. The benchmark is set on top of a concrete wall 1.22 m (4 ft) above the
ground. Special use permit or authorization is required to access the benchmark.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 9417426 PUBLICATION DATE: 06/30/2014
Name: NOYO HARBOR
CA
NOAA Chart: Latitude: 39° 25.5' N ( 39.42578)
USGS Quad: Longitude: 123° 48.3' W (-123.80511)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 941 7426B JETTY
DESIGNATION: 941 7426B JETTY
MONUMENTATION: Tidal Station disk VM#: 20979
AGENCY: US Army Corps of Engineers IDB PID:
SETTING CLASSIFICATION: Concrete curb OPUS PID:
LATITUDE: 39° 25.7' N ( 39.42775) LONGITUDE: 123° 48.5' W (-123.80822)
The benchmark is a 4 disk located 109.52 m (359.31 ft) WSW from the SW corner
of the restroom, 29.81 m (97.80 ft) S of the NW corner of the parking lot, 31.42
m (103.08 ft) SE of the SW corner of parking lot, and 4.75 m (15.58 ft) N of the
water edge. The benchmark is set on a 1.21 m (4 ft) by 1.21 m (4 ft) concrete
slab.
BENCH MARK STAMPING: 941 7426C USCG
DESIGNATION: 941 7426C USCG
MONUMENTATION: Tidal Station disk VM#: 20980
AGENCY: US Army Corps of Engineers IDB PID:
SETTING CLASSIFICATION: Concrete curb OPUS PID#: BBGR64
LATITUDE: 39° 25.4' N ( 39.42342) LONGITUDE: 123° 48.2' W (-123.80286)
The benchmark is 4 disk located 1.98 m(6.50 ft) E of the W most flag pole,
17.2 m(56.43 ft) W of the W corner of the USCG building, 49.93 m(163.81 ft) NWN
of the N side of the entrance gate, and 3.12 m(10.24 ft) NW of the NW corner of
USCG parking lot. The benchmark is set in a concrete walkway. Special use permit
or authorization is required to access the benchmark.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 9417426 PUBLICATION DATE: 06/30/2014
Name: NOYO HARBOR
CA
NOAA Chart: Latitude: 39° 25.5' N ( 39.42578)
USGS Quad: Longitude: 123° 48.3' W (-123.80511)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 941 7426D NOYO
DESIGNATION: 941 7426D NOYO
MONUMENTATION: Tidal Station disk VM#: 20981
AGENCY: US Army Corps of Engineers IDB PID:
SETTING CLASSIFICATION: Concrete curb OPUS PID:
LATITUDE: 39° 25.4' N ( 39.42319) LONGITUDE: 123° 48.1' W (-123.80208)
The benchmark is a 4 disk located 4.75 m(15.58 ft) NNW of the NW corner of the
harbormaster s office, 11.43 m(37.50 ft) NNW of the SW corner of the
harbormaster s office, 40.93 m(134.28 ft) NNE of the NE corner if the municipal
pier, and 23.79 m(78.05 ft) from the N most corner of fence surrounding storage
lot. The benchmark is set 15.24 cm (6 in) above the ground on top of concrete
curb.
BENCH MARK STAMPING: 941 7426E RAMP
DESIGNATION: 941 7426E RAMP
MONUMENTATION: Tidal Station disk VM#: 20982
AGENCY: US Army Corps of Engineers IDB PID:
SETTING CLASSIFICATION: Concrete curb OPUS PID:
LATITUDE: 39° 25.6' N ( 39.42681) LONGITUDE: 123° 47.9' W (-123.79831)
The benchmark is a 4 disk located 5.54 m (18.17 ft) E of the NW corner of
railing, 10.73 m (35.20 ft) NW of the end of the NE curb of the boat launch
ramp, and 22.16 m (72.70 ft) NW of the N corner of the NW island in parking lot.
The benchmark is set in a concrete walkway NE of the boat launch ramp.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 9417426 PUBLICATION DATE: 06/30/2014
Name: NOYO HARBOR
CA
NOAA Chart: Latitude: 39° 25.5' N ( 39.42578)
USGS Quad: Longitude: 123° 48.3' W (-123.80511)
T I D A L D A T U M S
Tidal datums at NOYO HARBOR based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: April 2011 - June 2011
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9416841 ARENA COVE, PACIFIC OCEAN
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 1.861
MEAN HIGH WATER MHW = 1.657
MEAN TIDE LEVEL MTL = 1.014
MEAN SEA LEVEL MSL = 1.001
MEAN LOW WATER MLW = 0.371
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
941 7426A F&G 4.821 3.164
941 7426B JETTY 3.911 2.254
941 7426C USCG 3.547 1.890
941 7426D NOYO 5.090 3.433
941 7426E RAMP 4.155 2.498
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 9417426 PUBLICATION DATE: 06/30/2014
Name: NOYO HARBOR
CA
NOAA Chart: Latitude: 39° 25.5' N ( 39.42578)
USGS Quad: Longitude: 123° 48.3' W (-123.80511)
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.