U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 10
Station ID: 9416174 PUBLICATION DATE: 07/18/2013
Name: SACRAMENTO, SACRAMENTO RIVER
CA
NOAA Chart: 18662 Latitude: 38° 34.8' N ( 38.58000)
USGS Quad: SACRAMENTO WEST Longitude: 121° 30.4' W (-121.50700)
To reach the tidal bench marks from Interstate 80 in Sacramento, take the
Interstate 5 North exit, then continue about 0.8 km (0.5 mi), and take the J
Street (downtown Sacramento) exit. Turn west (right) on Capitol Avenue, cross
Interstate 5, and take the Old Town Sacramento exit. The bench marks are along
Front Street, between Capitol Avenue and the Railroad bridge. The tide station
was located on the Tower Bridge (Capitol Avenue) on the NE fender.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 6174 B 1978
DESIGNATION: 941 6174 B
MONUMENTATION: Tidal Station disk VM#: 11381
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Unspecified deep rod OPUS PID:
LATITUDE: 38° 34.8' N ( 38.58000) LONGITUDE: 121° 30.4' W (-121.50700)
The primary bench mark is a disk located along the railroad tracks on the east
side of the Sacramento River and north of the Tower Bridge, 16.46 m (54.0 ft) SW
of the SW corner of the Old Sacramento School House Museum, 15.54 m (51.0 ft) NW
of the NW corner of the Old Town Sacramento Parking Garage, 4.88 m (16.0 ft) SW
of an ornamental light post, and 1.68 m (5.5 ft) east of the eastern rail of the
railroad tracks. The bench mark is crimped to an unspecified deep rod driven to
a depth of 24.4 m (80 ft), and enclosed in PVC pipe.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 10
Station ID: 9416174 PUBLICATION DATE: 07/18/2013
Name: SACRAMENTO, SACRAMENTO RIVER
CA
NOAA Chart: 18662 Latitude: 38° 34.8' N ( 38.58000)
USGS Quad: SACRAMENTO WEST Longitude: 121° 30.4' W (-121.50700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3
DESIGNATION: TIDAL 3
MONUMENTATION: Bench Mark disk VM#: 11382
AGENCY: US Army Corps of Engineers (USE) IDB PID#: JS2309
SETTING CLASSIFICATION: Concrete pier OPUS PID:
LATITUDE: 38° 35.1' N ( 38.58500) LONGITUDE: 121° 30.3' W (-121.50500)
The bench mark is a disk set in the top of the south end of a concrete pier at
the east end of the Southern Pacific Railroad draw span over the Sacramento
River at I Street.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 10
Station ID: 9416174 PUBLICATION DATE: 07/18/2013
Name: SACRAMENTO, SACRAMENTO RIVER
CA
NOAA Chart: 18662 Latitude: 38° 34.8' N ( 38.58000)
USGS Quad: SACRAMENTO WEST Longitude: 121° 30.4' W (-121.50700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4
DESIGNATION: TIDAL 4
MONUMENTATION: Bench Mark disk VM#: 11383
AGENCY: US Army Corps of Engineers (USE) IDB PID#: JS2310
SETTING CLASSIFICATION: Concrete pier OPUS PID:
LATITUDE: 38° 35.1' N ( 38.58500) LONGITUDE: 121° 30.3' W (-121.50500)
The bench mark is a disk set in the top of the east end of the pier at the south
end of the Southern Pacific Railroad draw span, on the same pier as bench mark 3
(U.S.E.) but on the opposite side of the tracks.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 10
Station ID: 9416174 PUBLICATION DATE: 07/18/2013
Name: SACRAMENTO, SACRAMENTO RIVER
CA
NOAA Chart: 18662 Latitude: 38° 34.8' N ( 38.58000)
USGS Quad: SACRAMENTO WEST Longitude: 121° 30.4' W (-121.50700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 5 1938
DESIGNATION: TIDAL 5
MONUMENTATION: Tidal Station disk VM#: 11384
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: JS2308
SETTING CLASSIFICATION: Concrete bridge foundation OPUS PID:
LATITUDE: 38° 35.1' N ( 38.58500) LONGITUDE: 121° 30.3' W (-121.50500)
The bench mark is a disk set in the SW corner of a concrete footing of the
highway bridge near the Southern Pacific Railroad draw bridge, in the south
footing of the first pier supporting the highway bridge before it becomes the
upper deck of the railroad bridge, about 11 m (35 ft) east of the east end of
the railroad bridge, 2.59 m (8.5 ft) east of the eastern rail of the tracks
running north-south, and 2.44 m (8.0 ft) south of the south rail of the tracks
running east-west.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 10
Station ID: 9416174 PUBLICATION DATE: 07/18/2013
Name: SACRAMENTO, SACRAMENTO RIVER
CA
NOAA Chart: 18662 Latitude: 38° 34.8' N ( 38.58000)
USGS Quad: SACRAMENTO WEST Longitude: 121° 30.4' W (-121.50700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6174 D 1980
DESIGNATION: 941 6174 D
MONUMENTATION: Tidal Station disk VM#: 11385
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Unspecified deep rod OPUS PID:
LATITUDE: 38° 34.8' N ( 38.58000) LONGITUDE: 121° 30.4' W (-121.50700)
The bench mark is a disk located 47.55 m (156.0 ft) due west of a manhole at the
intersection of Front and J Streets, 16.98 m (55.7 ft) east of a 1.52 m (5.0 ft)
high concrete and wooden wall on the east side of the Sacramento River, 16.43 m
(53.9 ft) from the NW corner of the NW corner post of the railroad depot, 12.98
m (42.6 ft) NE of a red fire hydrant west of the tracks, 11.28 m (37.0 ft) SW of
the SW corner of the Central Pacific Railroad Barn, and 0.91 m (3.0 ft) east of
the eastern-most rail of the western-most set of tracks running parallel to the
Sacramento River. The bench mark is set 0.21 m (0.7 ft) below the grade of the
railroad tracks, crimped to an unspecified rod driven to a depth of 29.3 m (96
ft), and enclosed with a PVC pipe and screw cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 10
Station ID: 9416174 PUBLICATION DATE: 07/18/2013
Name: SACRAMENTO, SACRAMENTO RIVER
CA
NOAA Chart: 18662 Latitude: 38° 34.8' N ( 38.58000)
USGS Quad: SACRAMENTO WEST Longitude: 121° 30.4' W (-121.50700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6174 E 1983
DESIGNATION: 941 6174 E
MONUMENTATION: Tidal Station disk VM#: 11386
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 38° 34.8' N ( 38.58000) LONGITUDE: 121° 30.4' W (-121.50700)
The bench mark is a disk set flush in the SE corner of the concrete foundation
of the Capitol Bridge near the intersection of Capitol Avenue and Front Street,
11.67 m (38.3 ft) south of the centerline of Capitol Avenue, 10.97 m (36.0 ft)
east of the southeastern-most stanchion of the Capitol Bridge, 4.54 m (14.9 ft)
SW of a railroad crossing light, and 0.21 m (0.7 ft) north of a 3.66 m (12.0 ft)
high cement wall.
BENCH MARK STAMPING: 6174 F 1983
DESIGNATION: 941 6174 F
MONUMENTATION: Tidal Station disk VM#: 11387
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 38° 34.8' N ( 38.58000) LONGITUDE: 121° 30.4' W (-121.50700)
The bench mark is a disk set in the west edge of a flag pole base at the Old
Sacramento School House Museum at the corner of Front and Neasham Streets, 21.34
m (70.0 ft) east of the east rail of the main line railroad tracks, 9.91 m (32.5
ft) east of an antique water pump in the school house yard, 4.54 m (14.9 ft)
north of the NE corner of the Old School House, and 0.21 m (0.7 ft) east from
the west edge of the foundation.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 10
Station ID: 9416174 PUBLICATION DATE: 07/18/2013
Name: SACRAMENTO, SACRAMENTO RIVER
CA
NOAA Chart: 18662 Latitude: 38° 34.8' N ( 38.58000)
USGS Quad: SACRAMENTO WEST Longitude: 121° 30.4' W (-121.50700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6174 H 1983
DESIGNATION: 941 6174 H
MONUMENTATION: Tidal Station disk VM#: 11388
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete railroad round house OPUS PID:
LATITUDE: 38° 34.8' N ( 38.58000) LONGITUDE: 121° 30.4' W (-121.50700)
The bench mark is a disk set flush in the west edge of a concrete railroad round
house near the California State Railroad Museum, located 78.33 m (257.0 ft)
south of bench mark NO 5 1938, 23.13 m (75.9 ft) SW from the SW corner of the
museum, 10.61 m (34.8 ft) south of fire hydrant B50419, 6.61 m (21.7 ft) east of
the east rail of the main line track, and 0.55 m (1.8 ft) east from the west
edge of the concrete foundation.
BENCH MARK STAMPING: 6174 I 1985
DESIGNATION: 941 6174 I
MONUMENTATION: Tidal Station disk VM#: 11389
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pavement OPUS PID:
LATITUDE: 38° 34.8' N ( 38.58000) LONGITUDE: 121° 30.4' W (-121.50700)
The bench mark is a disk set in the concrete pavement on the SW side of the
Capitol Mall highway overpass bridge which passes over Interstate 5, 10.09 m
(33.1 ft) east of the west end of the south railing of the overpass, 2.65 m (8.7
ft) south of the curb, 2.44 m (8.0 ft) east of the western-most metal light pole
on the south railing of the overpass, and 0.46 m (1.5 ft) above the sidewalk
level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 10
Station ID: 9416174 PUBLICATION DATE: 07/18/2013
Name: SACRAMENTO, SACRAMENTO RIVER
CA
NOAA Chart: 18662 Latitude: 38° 34.8' N ( 38.58000)
USGS Quad: SACRAMENTO WEST Longitude: 121° 30.4' W (-121.50700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: BM USED RESET 1964
DESIGNATION: BM USE RESET 1964
MONUMENTATION: Bench Mark disk VM#: 11390
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: JS2353
SETTING CLASSIFICATION: Curb OPUS PID:
LATITUDE: 38° 34.8' N ( 38.58000) LONGITUDE: 121° 30.4' W (-121.50700)
The bench mark is a disk set in the curb at the SE corner of Front and Capitol
Streets, 70 m (230 ft) west of bench mark 6174 I 1985, 40 m (131 ft) east of
bench mark 6174 E 1983, 10.18 m (33.4 ft) east of the large sewer manhole in the
center of Front Street, 7.19 m (23.6 ft) SW of the Front/Capitol Street sign,
2.41 m (7.9 ft) south of the stop sign, 0.09 m (0.3 ft) in from the street on
the curb, and 0.21 m (0.7 ft) above the road surface.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 10
Station ID: 9416174 PUBLICATION DATE: 07/18/2013
Name: SACRAMENTO, SACRAMENTO RIVER
CA
NOAA Chart: 18662 Latitude: 38° 34.8' N ( 38.58000)
USGS Quad: SACRAMENTO WEST Longitude: 121° 30.4' W (-121.50700)
T I D A L D A T U M S
Tidal datums at SACRAMENTO, SACRAMENTO RIVER based on:
LENGTH OF SERIES: 24 MONTHS
TIME PERIOD: July-Sep only for 1979-1987 except 9/80,8/82,7/83
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9415144 PORT CHICAGO, SUISUN BAY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.406
MEAN HIGH WATER MHW = 0.315
MEAN SEA LEVEL MSL = 0.186
MEAN TIDE LEVEL MTL = 0.176
MEAN LOW WATER MLW = 0.036
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum NAVD88 = -2.020
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
6174 B 1978 7.637 7.322
3 8.497 8.182
4 8.504 8.189
NO 5 1938 9.911 9.596
6174 D 1980 7.900 7.585
6174 E 1983 9.255 8.940
6174 F 1983 7.630 7.315
6174 H 1983 8.545 8.230
6174 I 1985 8.206 7.891
BM USED RESET 1964 7.682 7.367
Foot Notes:
Bench mark "BM USED RESET 1964" is based on one differential leveling connection
and do not meet the quality control standards of the NOS. Therefore, caution
should be used when deriving elevations for these marks.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 10 of 10
Station ID: 9416174 PUBLICATION DATE: 07/18/2013
Name: SACRAMENTO, SACRAMENTO RIVER
CA
NOAA Chart: 18662 Latitude: 38° 34.8' N ( 38.58000)
USGS Quad: SACRAMENTO WEST Longitude: 121° 30.4' W (-121.50700)
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.