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Bench Mark Sheet for 8735523, East Fowl River Bridge AL

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  7

                                                                                
Station ID: 8735523                         PUBLICATION DATE:  01/25/2017
Name:       STATE HIGHWAY 193 BRIDGE, E. FOWL RIVER           
            AL
NOAA Chart: 11376                           Latitude:   30° 26.6' N (  30.44369)
USGS Quad:  BELLE-FONTAINE                  Longitude:  88°  6.8' W ( -88.11392)


To reach from the intersection of state highway 193 and county road 24
(laurendine rd) in belle fontaine, proceed on route 193 for 6.0 km (3.7 mi) then
turn left onto old cedar point road and continue 0.3 km (0.2 mi) to the fowl
river marina. The bench marks are located at the marina and along Rt 193 north
of the bridge. The MLLWs are located on the top of the 193 bridge and the Hydro
gage is located just east of the Peligan Reef Restuarant.


                         T I D A L   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  5523 C 2011
                         DESIGNATION:          873 5523 C

MONUMENTATION:           Flange-encased Rod                    VM#:        20120
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID#: BBCL89
LATITUDE:   30° 26.7' N (  30.44536)          LONGITUDE:  88°  6.9' W ( -88.11525)


The primary bench mark is a deep-driven rod driven 87 ft (26.5 m) to refusal,
located near the northeast foot of the east fowl river brige in a grassy slope
next to bridge. 13.5 m (44.3 ft) east of the white line of state road 193, 15.0
m (49.2 ft) south of the centerline of paved road to marina, 14.10 m (46.3 ft)
west of the center of a concrete culvert, 20.35 m (66.8 ft) northwest of a pile
of rock next to the highway.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  7

                                                                                
Station ID: 8735523                         PUBLICATION DATE:  01/25/2017
Name:       STATE HIGHWAY 193 BRIDGE, E. FOWL RIVER           
            AL
NOAA Chart: 11376                           Latitude:   30° 26.6' N (  30.44369)
USGS Quad:  BELLE-FONTAINE                  Longitude:  88°  6.8' W ( -88.11392)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  5523 D 2011
                         DESIGNATION:          873 5523 D

MONUMENTATION:           Tidal Station disk                    VM#:        20107
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete road                         OPUS PID:        
LATITUDE:   30° 26.6' N (  30.44411)          LONGITUDE:  88°  6.9' W ( -88.11433)


The bench mark is a disk set in the concrete roadway on the southwest side near
the crest of the bridge, on the apron of the south bound land of the 193 bridge
(east fowl river), 145.78 m (478.3 ft) east-southeast of the north end of the
bridge, 6.43 m (21.1 ft) southwest of the centerline of the highway, 0.71 m (2.3
ft) northeast of the west side of the bridge.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  7

                                                                                
Station ID: 8735523                         PUBLICATION DATE:  01/25/2017
Name:       STATE HIGHWAY 193 BRIDGE, E. FOWL RIVER           
            AL
NOAA Chart: 11376                           Latitude:   30° 26.6' N (  30.44369)
USGS Quad:  BELLE-FONTAINE                  Longitude:  88°  6.8' W ( -88.11392)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  AL 17
                         DESIGNATION:          AL 17

MONUMENTATION:           DD                                    VM#:        20108
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:        
SETTING CLASSIFICATION:                                        OPUS PID:        
LATITUDE:   30° 26.7' N (  30.44525)          LONGITUDE:  88°  6.8' W ( -88.11381)


The bench mark is a rod set in the parking lot of the peligan reef parking lot
next to a lite pole #5-00879, 14.80 m (48.6 ft) NE of the NW corner of the fuel
containment wall, 11.31 m (37.1 ft) WSW of the centerline of the road leading to
a boat ramp, 0.66 m (2.2 ft) west of the lite pole, flush with the concrete.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  7

                                                                                
Station ID: 8735523                         PUBLICATION DATE:  01/25/2017
Name:       STATE HIGHWAY 193 BRIDGE, E. FOWL RIVER           
            AL
NOAA Chart: 11376                           Latitude:   30° 26.6' N (  30.44369)
USGS Quad:  BELLE-FONTAINE                  Longitude:  88°  6.8' W ( -88.11392)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  AL 17B
                         DESIGNATION:          AL 17B

MONUMENTATION:           Survey disk                           VM#:        20109
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:        
SETTING CLASSIFICATION:  Concrete sidewalk                     OPUS PID:        
LATITUDE:   30° 26.7' N (  30.44497)          LONGITUDE:  88°  6.8' W ( -88.11400)


The bench mark is a disk set in the concrete walkway leading to the fuel dock
store next to the boat ramp, 9.17 m (30.1 ft) southwest of the southwest corner
of the fuel storage container wall, 4.65 m (15.3 ft) northwest of the centerline
of the boat ramp, 3.40 m (11.2 ft) east of the northeast corner of the fuel
store.



                         BENCH MARK STAMPING:  5523 A 2011
                         DESIGNATION:          873 5523 A

MONUMENTATION:           Tidal Station disk                    VM#:        20118
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete bulkhead                     OPUS PID:        
LATITUDE:   30° 26.7' N (  30.44489)          LONGITUDE:  88°  6.8' W ( -88.11331)


The bench mark is a disk set in the concrete bulkhead at beginnning of pier next
to restauraunt. 7.4 m (24.3 ft) northeast of a chain link fence, 2.79 m (9.2 ft)
southeast of the northeast corner of a wood building, 17.67 m (58.0 ft)
north-northwest of the south end of the pier.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  7

                                                                                
Station ID: 8735523                         PUBLICATION DATE:  01/25/2017
Name:       STATE HIGHWAY 193 BRIDGE, E. FOWL RIVER           
            AL
NOAA Chart: 11376                           Latitude:   30° 26.6' N (  30.44369)
USGS Quad:  BELLE-FONTAINE                  Longitude:  88°  6.8' W ( -88.11392)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  5523 B 2011
                         DESIGNATION:          873 5523 B

MONUMENTATION:           Tidal Station disk                    VM#:        20119
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete drain                        OPUS PID:        
LATITUDE:   30° 26.7' N (  30.44572)          LONGITUDE:  88°  6.9' W ( -88.11431)


The bench mark is a disk set in a concrete drain in the southwest corner of a
parking lot for the pelican reef restaurant and boat ramp, 7.33 m (24.0 ft) west
of the centerline of road leading into restaurant, 10.34 m (33.9 ft) south of a
manhole cover, 26.88 m (88.2 ft) northwest of the center of a metal gate.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  7

                                                                                
Station ID: 8735523                         PUBLICATION DATE:  01/25/2017
Name:       STATE HIGHWAY 193 BRIDGE, E. FOWL RIVER           
            AL
NOAA Chart: 11376                           Latitude:   30° 26.6' N (  30.44369)
USGS Quad:  BELLE-FONTAINE                  Longitude:  88°  6.8' W ( -88.11392)


                            T I D A L   D A T U M S 


Tidal datums at STATE HIGHWAY 193 BRIDGE, E. FOWL RIVER based on:

     LENGTH OF SERIES:      5 YEARS
     TIME PERIOD:           August 2011 - July 2016
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8735180 DAUPHIN ISLAND, MOBILE BAY


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:

     HIGHEST OBSERVED WATER LEVEL (08/29/2012)         =  1.585
     MEAN HIGHER HIGH WATER                     MHHW   =  0.443
     MEAN HIGH WATER                            MHW    =  0.428
     MEAN TIDE LEVEL                            MTL    =  0.224
     MEAN SEA LEVEL                             MSL    =  0.220
     MEAN LOW WATER                             MLW    =  0.019
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (01/29/2014)         = -0.488

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     5523 C 2011                                 5.882    5.454
     5523 D 2011                                14.669   14.241
     AL 17                                       1.895    1.467
     AL 17B                                      0.873    0.445
     5523 A 2011                                 1.358    0.930
     5523 B 2011                                 3.203    2.775


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  7

                                                                                
Station ID: 8735523                         PUBLICATION DATE:  01/25/2017
Name:       STATE HIGHWAY 193 BRIDGE, E. FOWL RIVER           
            AL
NOAA Chart: 11376                           Latitude:   30° 26.6' N (  30.44369)
USGS Quad:  BELLE-FONTAINE                  Longitude:  88°  6.8' W ( -88.11392)


                             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.

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Products available at 8735523 East Fowl River Bridge, AL

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services