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Datums Page Page 1 of 5
Station ID: 9434098 PUBLICATION DATE: 03/24/2014
Name: FLORENCE USCG PIER, SUISLAW RIVER
OR
NOAA Chart: 18583 Latitude: 44° 0.1' N ( 44.00211)
USGS Quad: MERCER LAKE Longitude: 124° 7.4' W (-124.12300)
TO REACH THE STATION FROM THE INTERSECTION OF US HIGHWAY 101 AND OREGON STATE
HIGHWAY 126 (FLORENCE-EUGENE HIGHWAY) IN FLORENCE, PROCEED NORTH ON US HIGHWAY
101 FOR 2.6KM (1.6 MI) TO THE INTERSECTION OF 35TH STREET, TURN LEFT AND PROCEED
WEST ON 35TH STREET FOR 1.4 KM (0.9 MI) TO THE INTERSECTION OF RHODODENDRON
DRIVE, TURN RIGHT AND PROCEED NORTH FOR 0.3 KM (0.2 MI) TO THE INTERSECTION OF
COAST GUARD ROAD, TURN LEFT AND PROCEED 0.2 MI (0.3 KM) TO THE ENTRANCE TO THE
COAST GUARD FACILITY. THE TIDE STATION IS LOCATED ON THE COAST GUARD DOCK. FOUR
BENCHMARKS ARE LOCAED ON USCG PROPERTY AND ONE IS LOCATED JUST OUTSIDE THE
ENTRANCE GATE TO THE STATION ON COAST GUARD ROAD.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 4098 A 2013
DESIGNATION: 943 4098 A
MONUMENTATION: Flange-encased Rod VM#: 20769
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Flange-encased steel rod OPUS PID#: BBDB74
LATITUDE: 44° 0.2' N ( 44.00253) LONGITUDE: 124° 7.4' W (-124.12267)
THE BENCH MARK IS FLANGE ENCASED ROD SET IN THE CENTER OF THE NORTHWEST YARD
AREA OF THE COAST GUARD STATION, IT IS 34.08 M (111.8 FT) SOUTHEAST OF THE
SOUTHWEST CORNER OF THE COAST GUARD BUILDING, 24.01 M (78.8 FT) WEST OF BENCH
MARK 943 4098 B, 18.89 M (62.0 FT) NORTH-NORTHWEST OF LARGE ANTENNA BY COAST
GUARD OFFICE BUILDING, 17.66 M (57.9 FT) WEST-NORTHWEST OF END OF A GREEN CHAIN
LINK FENCE ON THE NORTH PROPERTY LINE AND 10.54 M (34.6 FT) SOUTH-SOUTHWEST OF A
WITNESS POST. THE DATUM POINT IS SET 10 CM (4 INCHES) BELOW THE GRADE, BEING THE
TOP OF A STAINLESS STEEL ROD DRIVEN 20.7 M (68 FT) TO SUBSTANTIAL RESISTANCE IN
A SLEEVE EXTENDING TO 1.1 M (3.6 FT), AND ENCASED IN A 5-INCH NATIONAL GEODETIC
SURVEY LOGO COVER.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 9434098 PUBLICATION DATE: 03/24/2014
Name: FLORENCE USCG PIER, SUISLAW RIVER
OR
NOAA Chart: 18583 Latitude: 44° 0.1' N ( 44.00211)
USGS Quad: MERCER LAKE Longitude: 124° 7.4' W (-124.12300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4098 B 2013
DESIGNATION: 943 4098 B
MONUMENTATION: Tidal Station disk VM#: 20770
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete mat OPUS PID:
LATITUDE: 44° 0.2' N ( 44.00256) LONGITUDE: 124° 7.3' W (-124.12239)
THE BENCH MARK IS A DISK SET IN A CONCRETE MAT ON THE NORTH SIDE OF THE COAST
GUARD OFFICE BUILDING, 24.01 M (78.8 FT) EAST OF BENCH MARK 943 4098 A, 14.24 M
(46.7 FT) WEST-SOUTHWEST OF THE SOUTHEAST CORNER OF AN ELECTRICAL OUTBUILDING,
9.15 M (30.0 FT) WEST-NORTHWEST OF THE NORTHEAST CORNER OF COAST GUARD OFFICE
BUILDING, 7.27 M (23.9 FT) SOUTH-SOUTHWEST OF A PROPERTY FENCE, 0.28 M (0.9 FT)
SOUTHEAST OF THE NORTHWEST CORNER OF THE CONCRETE MAT AND ABOUT 0.20 M (0.7 FT)
ABOVE THE GROUND.
BENCH MARK STAMPING: 4098 C 2013
DESIGNATION: 943 4098 C
MONUMENTATION: Tidal Station disk VM#: 20771
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pad OPUS PID:
LATITUDE: 44° 0.1' N ( 44.00211) LONGITUDE: 124° 7.3' W (-124.12189)
THE BENCH MARK IS A DISK SET IN A CONCRETE MAT CONTAINING A LARGE GENERATOR,
26.05 M (85.5 FT) EAST OF THE CENTER OF THE YELLOW STEPS IN THE FUEL TANK FARM,
15.94 M (52.3 FT) NORTH-NORTHEAST OF A UTILITY POLE JUST PASS THE COAST GUARD
ENTRANCE, 10.19 M (33.4 FT) EAST OF A METAL LIGHT POLE, 7.99 M (26.2 FT)
SOUTHEAST OF THE SOUTHWEST CORNER OF THE COAST GUARD SHOP, 0.54 M (1.8 FT)
SOUTHWEST OF A GENERATOR CORNER AND ABOUT 0.13 M (0.4 FT) ABOVE THE GROUND.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 9434098 PUBLICATION DATE: 03/24/2014
Name: FLORENCE USCG PIER, SUISLAW RIVER
OR
NOAA Chart: 18583 Latitude: 44° 0.1' N ( 44.00211)
USGS Quad: MERCER LAKE Longitude: 124° 7.4' W (-124.12300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4098 D 2013
DESIGNATION: 943 4098 D
MONUMENTATION: Tidal Station disk VM#: 20772
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete slab OPUS PID:
LATITUDE: 44° 0.1' N ( 44.00142) LONGITUDE: 124° 7.3' W (-124.12150)
THE BENCH MARK IS A DISK SET IN A CONCRETE MAT OUTSIDE THE COAST GUARD STATION
ON COAST GUARD ROAD, 63.84 M (209.4 FT) SOUTHEAST OF THE CENTER OF THE ROAD AT
THE COAST GUARD ENTRANCE GATE, 22.28 M (73.1 FT) NORTH-NORTHEAST OF THE
INTERSECTION OF COAST GUARD ROAD AND SEA WATCH PLACE, 16.61 M (54.5 FT)
NORTHWEST OF A UTILITY POLE NUMBERED V15N27, 5.57 M (18.3 FT) NORTHEAST OF THE
CENTER LINE OF COAST GUARD ROAD AND 2.26 M (7.4 FT) WEST-SOUTHWEST OF A RED
LIGHT ON A GREEN UTILITY BOX.
BENCH MARK STAMPING: 4098 E 2013
DESIGNATION: 943 4098 E
MONUMENTATION: Tidal Station disk VM#: 20773
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete steps OPUS PID:
LATITUDE: 44° 0.1' N ( 44.00228) LONGITUDE: 124° 7.4' W (-124.12250)
THE BENCH MARK IS A DISK SET IN A CONCRETE STEP, 27.07 M (88.8 FT)
NORTH-NORTHWEST OF A METAL LAMPPOST LEADING TO THE COAST GUARD DOCK, 25.99 M
(85.3 FT) NORTHWEST OF NORTHWEST CONCRETE CORNER OF TANK FARM FOUNDATION, 8.81 M
(28.9 FT) SOUTHEAST OF THE SOUTHWEST CORNER OF COAST GUARD OFFICE BUILDING, 4.99
M (16.4 FT) NORTHWEST OF THE COAST GUARD DOCK ACCESS ROAD, 1.35 M (4.4 FT)
NORTH-NORTHWEST OF THE METAL SUPPORT FOR THE RAILING OF THE STAIRS AND ABOUT
0.17 M (0.6 FT) ABOVE THE GROUND.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 9434098 PUBLICATION DATE: 03/24/2014
Name: FLORENCE USCG PIER, SUISLAW RIVER
OR
NOAA Chart: 18583 Latitude: 44° 0.1' N ( 44.00211)
USGS Quad: MERCER LAKE Longitude: 124° 7.4' W (-124.12300)
T I D A L D A T U M S
Tidal datums at FLORENCE USCG PIER, SUISLAW RIVER based on:
LENGTH OF SERIES: 4 MONTHS
TIME PERIOD: June 2013 - September 2013
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9432780 CHARLESTON, COOS BAY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 2.258
MEAN HIGH WATER MHW = 2.063
MEAN TIDE LEVEL MTL = 1.221
MEAN SEA LEVEL MSL = 1.219
MEAN LOW WATER MLW = 0.379
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
4098 A 2013 13.843 11.780
4098 B 2013 16.720 14.657
4098 C 2013 16.234 14.171
4098 D 2013 16.426 14.363
4098 E 2013 11.116 9.053
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 9434098 PUBLICATION DATE: 03/24/2014
Name: FLORENCE USCG PIER, SUISLAW RIVER
OR
NOAA Chart: 18583 Latitude: 44° 0.1' N ( 44.00211)
USGS Quad: MERCER LAKE Longitude: 124° 7.4' W (-124.12300)
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.