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Bench Mark Sheet for 8311062, Alexandria Bay NY

Superseded Epoch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Small blue map location marker Unpublished bench mark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  8

                                                                                
Station ID: 8311062                         PUBLICATION DATE:  08/11/2017
Name:       ALEXANDRIA BAY, ST. LAWRENCE                      
            NY
NOAA Chart: 14772                           Latitude:   44° 19.9' N (  44.33111)
USGS Quad:                                  Longitude:  75° 56.1' W ( -75.93453)


TO REACH THE NOS GAUGING STATION ON WELLESLEY ISLAND, JEFFERSON COUNTY, NEW
YORK, FROM THE INTERSECTION OF ISLAND ROAD AND LANDON ROAD, PROCEED 1.13 KM
(0.70 MILES) SOUTH ON LANDON ROAD TO THE ALEXANDRIA BAY COAST GUARD STATION,
STATION IS LOCATED ON THE COAST GUARD PROPERTY.


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


                 PRIMARY BENCH MARK STAMPING:  LAND 1981
                         DESIGNATION:          831 1062 LAND

MONUMENTATION:           Bench Mark disk                       VM#:          116
AGENCY:                  National Ocean Survey                 IDB PID#:  AH7263
SETTING CLASSIFICATION:                                        OPUS PID:        
LATITUDE:   44° 19.9' N (  44.33108)          LONGITUDE:  75° 56.3' W ( -75.93883)


The bench mark is a disk 28.0 m (92.0 feet) E of centerline of junction of
Landon and road To station, 11.3 m (37.1 feet) E of E end of a 12-foot oval
stone flower bed, 3.81 m (12.50 feet) SE of the centerline of road leading to
Coast Guard base, a disk set into a drill hole in bedrock on the S side of the
road, 0.3 m (1 foot) above road leading to station.



                         BENCH MARK STAMPING:  1062 E 1991
                         DESIGNATION:          831 1062 E

MONUMENTATION:           Bench Mark disk                       VM#:          109
AGENCY:                  National Ocean Service                IDB PID#:  AH7267
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   44° 19.9' N (  44.33233)          LONGITUDE:  75° 56.4' W ( -75.94025)


The bench mark is a disk crimped to a stainless steel rod driven 4.9 m (16 feet)
to refusal 47.9 m (157.0 feet) SE of driveway leading to private property of
Capt. Frank, 5.6 m (18.5 feet) NE of centerline of Landon Road, 0.76 m (2.5
feet) W of NYT power pole number 7, 0.5 m (1.5 feet) WNW of orange witness post.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  8

                                                                                
Station ID: 8311062                         PUBLICATION DATE:  08/11/2017
Name:       ALEXANDRIA BAY, ST. LAWRENCE                      
            NY
NOAA Chart: 14772                           Latitude:   44° 19.9' N (  44.33111)
USGS Quad:                                  Longitude:  75° 56.1' W ( -75.93453)


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


                         BENCH MARK STAMPING:  1062 D 1984
                         DESIGNATION:          831 1062 D

MONUMENTATION:           Bench Mark disk                       VM#:          110
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AH7266
SETTING CLASSIFICATION:  In bedrock                            OPUS PID:        
LATITUDE:   44° 19.9' N (  44.33167)          LONGITUDE:  75° 56.2' W ( -75.93619)


The bench mark is a disk 15.5 m (50.9 feet) NNE of center of main Coast Guard
driveway, 9.8 m (32.2 feet) SE of SW corner and 6.9 m (22.7 feet) S of SE corner
of four car garage, 6.9 m (22.8 feet) NE of N corner of culvert on NW side on
driveway to garage.



                         BENCH MARK STAMPING:  1062 A 1981
                         DESIGNATION:          831 1062 A

MONUMENTATION:           Bench Mark disk                       VM#:          111
AGENCY:                  National Ocean Survey                 IDB PID#:  AH7268
SETTING CLASSIFICATION:                                        OPUS PID:        
LATITUDE:   44° 19.9' N (  44.33114)          LONGITUDE:  75° 56.1' W ( -75.93450)


The bench mark is a disk 9.6 m (31.5 feet) E of bottom step of steps from
station headquarters leading down to dock, 6.7 m(21.9 feet) SW of top step of
three steps at S end of boat dock, 7.3 m (23.8 feet) NW of flagpole base.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  8

                                                                                
Station ID: 8311062                         PUBLICATION DATE:  08/11/2017
Name:       ALEXANDRIA BAY, ST. LAWRENCE                      
            NY
NOAA Chart: 14772                           Latitude:   44° 19.9' N (  44.33111)
USGS Quad:                                  Longitude:  75° 56.1' W ( -75.93453)


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


                         BENCH MARK STAMPING:  1062 C 1981
                         DESIGNATION:          831 1062 C

MONUMENTATION:           Bench Mark disk                       VM#:          112
AGENCY:                  National Ocean Survey                 IDB PID#:  AH7265
SETTING CLASSIFICATION:                                        OPUS PID:        
LATITUDE:   44° 20.0' N (  44.33269)          LONGITUDE:  75° 56.1' W ( -75.93458)


The bench mark is a disk is 82.3 m (270 feet) N of the headquarters building, at
a sharp curve in driveway leading from headquarters building to residential
area, 4.43 m (14.55 feet) N of N edge of driveway, 9.2 m (30.1 feet) SSE of a
stone bulkhead that runs E-W , 2.80 m (9.2 feet) E of the center of top step of
stone steps leading down to a shingled boathouse.



                         BENCH MARK STAMPING:  GOLF 1981
                         DESIGNATION:          831 1062 GOLF

MONUMENTATION:           Bench Mark disk                       VM#:          266
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AH7264
SETTING CLASSIFICATION:                                        OPUS PID:        
LATITUDE:   44° 20.1' N (  44.33436)          LONGITUDE:  75° 56.7' W ( -75.94469)


The bench mark is a disk 118.9 m (390 feet) WNW of the junction of Island and
Landon Roads (Landon Road leads SE to the Alexandria Bay Coast Guard Station),
31.1 m (102 feet) NW of centerline of Island Road, 27.0 m (88.5 feet) NNW of NYT
pole number 41 (combined telephone/electric), 27.1 m (89.0 feet) ESE of SE
corner of number 8 tee.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  8

                                                                                
Station ID: 8311062                         PUBLICATION DATE:  08/11/2017
Name:       ALEXANDRIA BAY, ST. LAWRENCE                      
            NY
NOAA Chart: 14772                           Latitude:   44° 19.9' N (  44.33111)
USGS Quad:                                  Longitude:  75° 56.1' W ( -75.93453)


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


                         BENCH MARK STAMPING:  L.M.N. 1998
                         DESIGNATION:          831 1062 LMN.

MONUMENTATION:           Bench Mark disk                       VM#:        16981
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  DE7816
SETTING CLASSIFICATION:  Drill hole in rock outcrop            OPUS PID:        
LATITUDE:   44° 19.4' N (  44.32294)          LONGITUDE:  75° 57.4' W ( -75.95667)


The bench mark is a disk 77.11 m (253.00 ft) E of the center line of Deer Point
Road, 16.9 m (55.3 ft) N of the center line of Island Road, 8.0 m (26.3 ft) WSW
of nail and washer in 6 inch tree, 0.7 m (2.2 ft) S of witness post set in rock,
in top of a 5'x 6' exposed 8" above ground section of rock outcropping,0.6 m
(2.0 ft) below the level of the road.



                         BENCH MARK STAMPING:  DEE 1981
                         DESIGNATION:          831 1062 DEE

MONUMENTATION:           Bench Mark disk                       VM#:        16982
AGENCY:                  National Ocean Survey                 IDB PID#:  DG7149
SETTING CLASSIFICATION:                                        OPUS PID:        
LATITUDE:   44° 18.4' N (  44.30739)          LONGITUDE:  75° 59.2' W ( -75.98736)


The bench mark is a disk 27.0 m (88.6 ft) ENE of the center line of county route
191, 21.8 m (71.5 ft) WNW of county route 100 (Island Road), 12.2 m (40.0 ft)
SSW of NYT pole no. 6, 0.5 m (1.5 ft) SE of a witness post, in top of and flush
with the ground of an exposed section of rock outcropping.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  8

                                                                                
Station ID: 8311062                         PUBLICATION DATE:  08/11/2017
Name:       ALEXANDRIA BAY, ST. LAWRENCE                      
            NY
NOAA Chart: 14772                           Latitude:   44° 19.9' N (  44.33111)
USGS Quad:                                  Longitude:  75° 56.1' W ( -75.93453)


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


                         BENCH MARK STAMPING:  JAMISON 1981
                         DESIGNATION:          831 1062 JAMISON

MONUMENTATION:           Bench Mark disk                       VM#:        16984
AGENCY:                  National Ocean Survey                 IDB PID#:  DG7148
SETTING CLASSIFICATION:                                        OPUS PID:        
LATITUDE:   44° 18.8' N (  44.31264)          LONGITUDE:  75° 58.5' W ( -75.97439)


The bench mark is a disk 53.2 m (174.5 ft) S of and across section of Old Island
Road from center line of county route 100 (Island Road), 27.4 m (90.0 ft) SSW
and across old section of Island Road from NYT pole no. 21, 16.2 m (53.0 ft) S
of center of double yellow lines in section of Old Island Road, 7.2 m (23.6 ft)
E of a nail and washer in face of 12 inch black oak tree, 1.1 m (3.5 ft) NW of
nail and washer in face of a 8 inch cedar tree, 10.3 m (33.9 ft) S of a witness
post, 0.5 m (1.5 ft) above the level of the old road and in the base of a large
section of rock outcropping.



                         BENCH MARK STAMPING:  1062 F 2016
                         DESIGNATION:          831 1062 F

MONUMENTATION:           Bench Mark disk                       VM#:        21955
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete fuel tank foundation         OPUS PID:        
LATITUDE:   44° 19.9' N (  44.33172)          LONGITUDE:  75° 56.1' W ( -75.93522)


The bench mark is a disc set in a 3.7m (12.14 ft) x 6.25m (20.51 ft) concrete
pad with a heating oil tank, flush with the ground, 36.0 m (118.1 ft) ENE of the
Northernmost corner of a boat shop building, 24.4m (80.05 ft) South of the
Easternmost corner of a wooden shack on the boat ramp access road,  20.55m
(67.42 ft) NE of the NW corner of a workout/gym building.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  8

                                                                                
Station ID: 8311062                         PUBLICATION DATE:  08/11/2017
Name:       ALEXANDRIA BAY, ST. LAWRENCE                      
            NY
NOAA Chart: 14772                           Latitude:   44° 19.9' N (  44.33111)
USGS Quad:                                  Longitude:  75° 56.1' W ( -75.93453)


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


                         BENCH MARK STAMPING:  1062 G 2016
                         DESIGNATION:          831 1062 G

MONUMENTATION:           Bench Mark disk                       VM#:        21956
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Bedrock outcrop                       OPUS PID:        
LATITUDE:   44° 19.9' N (  44.33200)          LONGITUDE:  75° 56.2' W ( -75.93681)


The bench mark is a disc set in an outcrop of exposed bedrock, 45.4m (148.95 ft)
ENE of the Northernmost corner of a coast guard sign, 29.3m (96.13 ft) North of
the Northernmost corner of a basketball court, 6.92m (22.7 ft) SE of a 1.65m
(5.4 ft) tall stone fence.



                         BENCH MARK STAMPING:  1062 H 2016
                         DESIGNATION:          831 1062 H

MONUMENTATION:           Bench Mark disk                       VM#:        21957
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:                                        OPUS PID:        
LATITUDE:   44° 19.9' N (  44.33150)          LONGITUDE:  75° 56.2' W ( -75.93747)


The bench mark is a disc set in exposed bedrock, 43.05m (141.24 ft) WSW of the
southernmost edge of a coast guard sign, 15.2m (53.15 ft) SSW of the
southernmost edge of a USCG gate, 13.6m (44.61 ft) South of the NE-most end post
of a 2.05m (6.73 ft) tall stone fence.





Foot Notes:

Above marks are published for informational purposes only.  Long term stability
has not been reviewed prior to publication.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  8

                                                                                
Station ID: 8311062                         PUBLICATION DATE:  08/11/2017
Name:       ALEXANDRIA BAY, ST. LAWRENCE                      
            NY
NOAA Chart: 14772                           Latitude:   44° 19.9' N (  44.33111)
USGS Quad:                                  Longitude:  75° 56.1' W ( -75.93453)


                             D E F I N I T I O N S


The International Great Lakes Datum (IGLD) is the vertical height reference
datum used in the Great Lakes/St. Lawrence River System for engineering,
charting, channel dredging, navigation safety, power generation, and water 
resource management. It is a coordinated datum between the United States and
Canada that ensures both countries are using the same reference for projects
in the Great Lakes basin. The datum origin, or zero, is defined as Mean Sea 
Level at Pointe-au-Pere /Rimouski, Quebec, Canada at the mouth of the 
St. Lawrence River. IGLD requires updating approximately every 25-30 years 
to account for varying changes in the land surface elevations following the 
retreat of the glaciers during the last ice age, referred to as Glacial 
Isostatic Adjustment (GIA). The current IGLD 1985 was implemented in 1992.

IGLD 1985 uses dynamic heights as the vertical reference standard and lakes
station water level elevations are adjusted to provide a level geopotential
plane for lake level reference.

Dynamic height is the potential difference along the plumbline between the 
vertical datum and a point of interest divided by a constant value of 
gravity. In Canada and USA, the constant value of gravity is the 
"normal gravity" on the ellipsoid at latitude 45 (9.806199 ms-2). Dynamic 
heights have no geometric meaning. They are mainly used for the management 
of water in large lakes, rivers and channels. The surface of a lake has a 
constant dynamic height if undisturbed by currents, winds, atmospheric 
pressure, etc.

The Hydraulic Corrector (HC) is the difference in the long term water level 
mean between Subordinate and Master station. The difference (HC) is 
subtracted algebraically at the subordinate gauge referencing the same 
elevation as the master station. Thus all water levels on a given lake can 
be referenced to the same lakes LWD/Chart Datum reference elevation.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  8 of  8

                                                                                
Station ID: 8311062                         PUBLICATION DATE:  08/11/2017
Name:       ALEXANDRIA BAY, ST. LAWRENCE                      
            NY
NOAA Chart: 14772                           Latitude:   44° 19.9' N (  44.33111)
USGS Quad:                                  Longitude:  75° 56.1' W ( -75.93453)


                             D E F I N I T I O N S


A Master Stations is the control point for determining water level 
elevations on a particular lake of the Great Lakes.   Since water surfaces
of the Great Lakes are considered to be at geopotential equal, all Mean 
Water Level (MWL) values for stations on a particular lake should have the 
same dynamic height.  Therefore, all subordinate water level station MWL 
values are adjusted to match the dynamic water level elevation of the Master
Station through the use of a hydraulic corrector.  In the establishment of 
International Great Lakes Datum (1985) the connecting waterways station 
dynamic elevations were calculated through the use of a linear regression 
while constraining the end points of the regression with the dynamic 
elevations of the corresponding master station above and below the 
connecting channel.

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 toNAVD88 are available from NGS through the World Wide 
Web at National Geodetic Survey.

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/.


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Products available at 8311062 Alexandria Bay, NY

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services