U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 9
PUBLICATION DATE: 04/12/1984
Station ID: 9419750 SUPERCEDED DATE: 04/21/2003
Name: CRESCENT CITY, PACIFIC OCEAN
CALIFORNIA
NOAA Chart: 18603 Latitude: 41° 44.7' N
USGS Quad: CRESCENT CITY Longitude: 124° 11.0' W
To reach the tidal bench marks from U.S. Highway 101 turn west on Citizens Dock
Road, and proceed 0.2 mile (0.3 km) to Citizens Dock. The tide station is a 4 x
6 wood frame house located 200 feet (61 m) SW of the foot of dock.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: TIDAL 20 1959 RESET 1960
MONUMENTATION: Survey Disk VM#: 1016
AGENCY: PID#: LV0110
SETTING CLASSIFICATION: Concrete Block
The bench mark is set in the top of a 1.5 foot (0.5 m) square concrete block at
the west corner of the retaining wall where the wooden portion of Citizens Dock
joins the cement portion of the dock, and 16 feet (5 m) east of center of the
dock roadway. The bench mark is set 0.7 foot (0.2 m) above the dock pavement.
BENCH MARK STAMPING: 6 1933
MONUMENTATION: Survey Disk VM#: 1017
AGENCY: PID#: LV0117
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is at the intersection of Front and D Streets, 63 feet (19 m) NE
of the east corner of a real estate office building, 2.5 feet (7.6 m) NE of the
extended centerline of D Street, and 10.5 feet (3.2 m) SE of the SE curb of
Front Street.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 9
PUBLICATION DATE: 04/12/1984
Station ID: 9419750 SUPERCEDED DATE: 04/21/2003
Name: CRESCENT CITY, PACIFIC OCEAN
CALIFORNIA
NOAA Chart: 18603 Latitude: 41° 44.7' N
USGS Quad: CRESCENT CITY Longitude: 124° 11.0' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7 1945
MONUMENTATION: Survey Disk VM#: 1019
AGENCY: PID#: LV0115
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is on the south side of Front Street, on the SW corner of the
intersection of Front and H Streets, 23 feet (7 m) SW of the extended center-
line of H Street, 10.5 feet (3.2 m) SE of the SE curb of Front Street, and 2.0
feet (0.6 m) above street level.
BENCH MARK STAMPING: 8 1945
MONUMENTATION: Survey Disk VM#: 1020
AGENCY: PID#: LV0122
SETTING CLASSIFICATION: Foundation Base
The bench mark is 372 feet (113 m) SE of the intersection of Battery and A
Streets, 150 feet (46 m) NW of the inshore end of the breakwater, 41 feet (12.5
m) SW of the centerline of the road leading SE to the breakwater pier, and 2.0
(0.6 m) above the ground. The bench mark is set in top of the foundation of an
old machinery base.
BENCH MARK STAMPING: PASS 1941
MONUMENTATION: Survey Disk VM#: 1021
AGENCY: PID#: LV0116
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is midway between F and G Street, across the street from McKays
market, 15 feet (4.6 m) east of a light pole, and 10 feet (3 m) SE curb of Front
Street.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 9
PUBLICATION DATE: 04/12/1984
Station ID: 9419750 SUPERCEDED DATE: 04/21/2003
Name: CRESCENT CITY, PACIFIC OCEAN
CALIFORNIA
NOAA Chart: 18603 Latitude: 41° 44.7' N
USGS Quad: CRESCENT CITY Longitude: 124° 11.0' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2A 1958
MONUMENTATION: Survey Disk VM#: 1022
AGENCY: PID#: LV0114
SETTING CLASSIFICATION: Concrete Post
The bench mark is set in a park near the intersection of Front Street and L
Street, 57 feet (17 m) SE of Front Street, 10.5 feet (3.2 m) NW of a former sea
wall which is now flush with ground and forms the SW wall of the park sidewalk,
and 1 foot (0.3 m) SW of the SW curb of south bound U.S. Highway 101 (L Street).
The bench mark is set 0.6 foot (0.2 m ) below ground level.
BENCH MARK STAMPING: TIDAL 18 1959
MONUMENTATION: Survey Disk VM#: 1023
AGENCY: PID#: LV0113
SETTING CLASSIFICATION: Concrete Headwall
The bench mark is set in the top of the east end of the south headwall of a
concrete bridge over Elk Creek, in the center of the sidewalk, and 6 feet (2 m)
SW of the concrete curb on the SW side of U.S. Highway 101. The bench mark is
set in a 10-inch diameter handhole with metal cover stamped Monument, and 0.3
foot (0.1 m) below the sidewalk surface.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 9
PUBLICATION DATE: 04/12/1984
Station ID: 9419750 SUPERCEDED DATE: 04/21/2003
Name: CRESCENT CITY, PACIFIC OCEAN
CALIFORNIA
NOAA Chart: 18603 Latitude: 41° 44.7' N
USGS Quad: CRESCENT CITY Longitude: 124° 11.0' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: TIDAL 19 1959
MONUMENTATION: Survey Disk VM#: 1024
AGENCY: PID#: LV0112
SETTING CLASSIFICATION: Pavement
The bench mark is set in the east driveway of a Chevron Service Station on the
north side of U.S. Highway 101, 227 feet (69 m) west along U.S. Highway 101 from
the centerline of ELk Vallley Road, 128 feet (39 m) SE of the SE corner of the
service station building, and 40 feet (12 m) north of the centerline of U.S.
Highway 101. The bench mark is set in an 8-inch diameter handhole covered by a
metal plate stamped OPW 7 014 CINO, and 0.1 foot (.03 m) below ground level.
BENCH MARK STAMPING: S 1089 1967
MONUMENTATION: Survey Disk VM#: 1025
AGENCY: PID#: LV0101
SETTING CLASSIFICATION: Rod
The bench mark is 0.75 mile (1.2 km) SE along U.S. Highway 101 from the
intersection with Front Street, 148 feet (45 m) west of the center of the
junction of Citizens Dock Road and U.S. Highway 101, 28 feet (8.5 m) NW of the
centerline of Citizens Dock Road, 2 feet (0.6 m) NE of a power pole, and 2 feet
(0.6 m) SW of a witness post.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 9
PUBLICATION DATE: 04/12/1984
Station ID: 9419750 SUPERCEDED DATE: 04/21/2003
Name: CRESCENT CITY, PACIFIC OCEAN
CALIFORNIA
NOAA Chart: 18603 Latitude: 41° 44.7' N
USGS Quad: CRESCENT CITY Longitude: 124° 11.0' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: U 1089 1967
MONUMENTATION: Survey Disk VM#: 1026
AGENCY: PID#: LV0108
SETTING CLASSIFICATION: Copper-Clad Steel Rod
The bench mark is set by the parking lot for Eureka Fisheries, Inc., 234 feet
(71 m) SW of the centerline of Starfish Way, 120 feet (37 m) west of the NW
corner of Eureka Fisheries warehouse, 7.5 feet (2.3 m) west of the SE corner of
a 6-foot (1.8 m) high cyclone fence, 1.1 feet (0.3 m) SE of a metal witness
post, and 0.5 foot (0.2 m) NE of the curb. The bench mark is crimped to a steel
rod driven 30 feet (9 m) and set 0.2 foot (0.1 m) above ground level.
BENCH MARK STAMPING: NO 23 1972
MONUMENTATION: Survey Disk VM#: 1027
AGENCY: PID#: LV0561
SETTING CLASSIFICATION: Concrete Slab
The bench mark is set in the northern corner of the concrete slab in front of
the office of the Town House Motel along U.S. Highway 101, 50 feet (15 m) SW of
the U.S. Highway 101 centerline, 27 feet (8 m) west of a street light pole, and
0.5 foot (0.2 m) south of the concrete slab corner. The bench mark is set 1
foot (0.3 m) above street level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 9
PUBLICATION DATE: 04/12/1984
Station ID: 9419750 SUPERCEDED DATE: 04/21/2003
Name: CRESCENT CITY, PACIFIC OCEAN
CALIFORNIA
NOAA Chart: 18603 Latitude: 41° 44.7' N
USGS Quad: CRESCENT CITY Longitude: 124° 11.0' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 24 1972
MONUMENTATION: Survey Disk VM#: 1028
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Step
The bench mark is set near the intersection of U.S. Highway 101 and Citizens
Dock Road in the north corner of the bottom concrete step leading into the
Lighthouse Bait and Tackle Shop, 97.5 feet (29.7 m) north of the intersection
and 54.5 feet (16.6 m) north of telephone pole No. C7197. The bench mark is set
at ground level.
BENCH MARK STAMPING: NO 25 1975
MONUMENTATION: Survey Disk VM#: 1029
AGENCY: PID#: LV0565
SETTING CLASSIFICATION: Concrete Slab
The bench mark is set in the front of the Grotto Restaurant, in SW corner of a
4-foot (1 m) square concrete slab utilized as a telephone booth base, 110 feet
(34 m) NE of the intersection of Marine Way and Citizens Dock Road, 25 feet (8
m) SE from the centerline of Citizens Dock Road, and 0.5 foot (0.2 m) SE of the
SE curb of Citizens Dock Road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 9
PUBLICATION DATE: 04/12/1984
Station ID: 9419750 SUPERCEDED DATE: 04/21/2003
Name: CRESCENT CITY, PACIFIC OCEAN
CALIFORNIA
NOAA Chart: 18603 Latitude: 41° 44.7' N
USGS Quad: CRESCENT CITY Longitude: 124° 11.0' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9750 S 1977
MONUMENTATION: Survey Disk VM#: 1030
AGENCY: PID#: LV0562
SETTING CLASSIFICATION: Copper-Clad Steel Rod
The bench mark is set in a landscaped area of the Northwoods Inn Motel, 720 feet
(219 m) NW of the intersection of Citizens Dock Road and U.S. Highway 101, 25
feet (8 m) NE of the NE edge of U.S. Highway 101, 0.7 foot (0.2 m) east of a
metal witness post, and 0.3 foot (0.1 m) west of telephone pole No. E57345. The
bench mark is crimped to a steel rod driven 32 feet (10 m) below ground level in
a 4-inch PVC pipe.
BENCH MARK STAMPING: 9750 T 1977
MONUMENTATION: Survey Disk VM#: 1031
AGENCY: PID#: LV0564
SETTING CLASSIFICATION: Copper-Clad Steel Rod
The bench mark is set along the NW edge of Citizens Dock Road, 520 feet (158 m)
NE of bench mark NO 25 1972, 355 feet (108 m) SW of U.S. Highway 101, 40.5 feet
(12.3 m) NW of the centerline of Citizens Dock Road, and 2 feet (0.6 m) NW of a
metal witness post. THe bench mark is crimped to a steel rod 30 feet (9 m) and
is inside a 4-inch PVC pipe.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 9
PUBLICATION DATE: 04/12/1984
Station ID: 9419750 SUPERCEDED DATE: 04/21/2003
Name: CRESCENT CITY, PACIFIC OCEAN
CALIFORNIA
NOAA Chart: 18603 Latitude: 41° 44.7' N
USGS Quad: CRESCENT CITY Longitude: 124° 11.0' W
T I D A L D A T U M S
Tidal datums at CRESCENT CITY, PACIFIC OCEAN based on:
LENGTH OF SERIES: 19 YEARS
TIME PERIOD: 1960-1978
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (01/29/1983) = 10.69
MEAN HIGHER HIGH WATER MHHW = 6.96
MEAN HIGH WATER MHW = 6.33
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 3.79
MEAN TIDE LEVEL MTL = 3.78
MEAN LOW WATER MLW = 1.23
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (06/30/1969) = -2.76
* NGVD reference based on adjustment of 1973 and NOS levels of 1933.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
TIDAL 20 1959 RESET 1960 13.49 7.16
6 1933 13.95 7.62
7 1945 13.93 7.60
8 1945 29.87 23.54
PASS 1941 14.24 7.91
2A 1958 12.82 6.49
TIDAL 18 1959 12.56 6.23
TIDAL 19 1959 12.52 6.19
S 1089 1967 15.00 8.67
U 1089 1967 13.87 7.54
NO 23 1972 16.08 9.75
NO 24 1972 15.35 9.02
NO 25 1975 11.41 5.08
9750 S 1977 14.60 8.27
9750 T 1977 15.17 8.84
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 9
PUBLICATION DATE: 04/12/1984
Station ID: 9419750 SUPERCEDED DATE: 04/21/2003
Name: CRESCENT CITY, PACIFIC OCEAN
CALIFORNIA
NOAA Chart: 18603 Latitude: 41° 44.7' N
USGS Quad: CRESCENT CITY Longitude: 124° 11.0' W
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 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.