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Bench Mark Sheet for 9457724, Larsen Bay, Kodiak Island, AK AK

Superseded Epoch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Small blue map location marker Unpublished bench mark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: 9457724                         PUBLICATION DATE:  05/19/2010
Name:       LARSEN BAY, KODIAK ISLAND                         
            AK
NOAA Chart: 16599                           Latitude:   57° 32.0' N (  57.53330)
USGS Quad:  KODIAK (C-6)                    Longitude: 153° 59.4' W (-153.99000)


To reach from the Kodiak airport travel by vehicle 11.6 km (7.2 miles) NE to St.
Paul s Harbor in the city of Kodiak.  From St. Paul s Harbor travel 16.9 km
(10.5 miles) NE by boat out the Near Island Channel until the red # 4 navigation
aid is to port, then turn to the NW for 6 nm (6.9 mi) navigating through the
Ouzinkie Narrows, round Shakmonof Point, travel SW 6 nm (6.9 mi) and navigate
through Whale Passage 10 nm (11.5 mi) then continue west and navigate Kupreanof
Strait 20 nm (23 mi). Once in Shelikof Strait bear SSW 20 nm (23 mi) into Uyak
Bay, bear SSE for 15 nm (17.3 mi).  Enter Larsen Bay and follow the navigation
markers to the small boat harbor. The benchmarks are located NE of the small
boat harbor on the Icicle Seafoods Packers pier.


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


                 PRIMARY BENCH MARK STAMPING:  7724 A 1995
                         DESIGNATION:          945 7724 A

MONUMENTATION:           Tidal Station disk                    VM#:         5796
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   57° 32.0' N (  57.53330)          LONGITUDE: 153° 59.4' W (-153.99000)


The primary bench mark is a disk set in a concrete foundation on the north side
of the fish house at Kodiak Salmon Packers Pier, 9.30 m (30.5 ft) south of North
edge of pier face, 4.54 m (14.9 ft) east of NW corner of fish house, and 0.10 m
(0.3 ft) west of east side of roll up door entrance to fish house.

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

                                                                                
Station ID: 9457724                         PUBLICATION DATE:  05/19/2010
Name:       LARSEN BAY, KODIAK ISLAND                         
            AK
NOAA Chart: 16599                           Latitude:   57° 32.0' N (  57.53330)
USGS Quad:  KODIAK (C-6)                    Longitude: 153° 59.4' W (-153.99000)


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


                         BENCH MARK STAMPING:  5 1964
                         DESIGNATION:          945 7724 BM 5

MONUMENTATION:           Tidal Station disk                    VM#:         4477
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:        
SETTING CLASSIFICATION:  Concrete curb                         OPUS PID:        
LATITUDE:   57° 32.3' N (  57.53756)          LONGITUDE: 153° 59.5' W (-153.99156)


The bench mark is a disk set in concrete curb which surrounds concrete floor
supporting steam boiler in power plant building for Kodiak Salmon Packers  Inc.,
 2.60 m (8.5 ft) SW of center of east end of boiler,  and 0.76 m (2.5 ft) west
of SE corner of concrete curb which projects 0.15 m (0.5 ft) above the floor.



                         BENCH MARK STAMPING:  6 1964
                         DESIGNATION:          945 7724 BM 6

MONUMENTATION:           Tidal Station disk                    VM#:         4478
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:        
SETTING CLASSIFICATION:  Cocrete curb                          OPUS PID:        
LATITUDE:   57° 32.2' N (  57.53742)          LONGITUDE: 153° 59.5' W (-153.99200)


The bench mark is a disk set in concrete curb which surrounds concrete floor
supporting steam boiler in power plant building for Kodiak Salmon Packers  Inc.,
12.04 m ( 39.5 ft) west of south side of building which is near east end of
boiler, 10.52 m (34.5 ft) west of bench mark 945 7724 BM 5, and 0.46 m (1.5 ft)
east  of SW corner of concrete curbing.

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

                                                                                
Station ID: 9457724                         PUBLICATION DATE:  05/19/2010
Name:       LARSEN BAY, KODIAK ISLAND                         
            AK
NOAA Chart: 16599                           Latitude:   57° 32.0' N (  57.53330)
USGS Quad:  KODIAK (C-6)                    Longitude: 153° 59.4' W (-153.99000)


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


                         BENCH MARK STAMPING:  7724 B 1995
                         DESIGNATION:          945 7724 B

MONUMENTATION:           Tidal Station disk                    VM#:         5798
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   57° 32.0' N (  57.53330)          LONGITUDE: 153° 59.4' W (-153.99000)


The bench mark is a disk set in a concrete foundation on the north side of the
fish house at Kodiak Salmon Packers Pier, 20.15 m (66.1 ft) west of NE corner of
the fish house, 9.11 m (29.9 ft) south of north edge of pier face, and 0.10 m
(0.3 ft) west of east side of rollup door entrance on middle of north side.



                         BENCH MARK STAMPING:  7724 C 1995
                         DESIGNATION:          945 7724 C

MONUMENTATION:           Tidal Station disk                    VM#:         6488
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   57° 32.2' N (  57.53742)          LONGITUDE: 153° 59.6' W (-153.99297)


The bench mark is a disk set in concrete foundation on the east end of the fish
house on Icicle Seafood Pier, 11.82 m (38.8 ft) west of SW corner of a Can Shop,
6.45 m (21.2 ft) north of SE corner of Fish House , and 0.16 m (0.5 ft) north of
south side of roll up door at east end of Fish House.

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

                                                                                
Station ID: 9457724                         PUBLICATION DATE:  05/19/2010
Name:       LARSEN BAY, KODIAK ISLAND                         
            AK
NOAA Chart: 16599                           Latitude:   57° 32.0' N (  57.53330)
USGS Quad:  KODIAK (C-6)                    Longitude: 153° 59.4' W (-153.99000)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          945 7724 G
                         ALIAS:                BM A 1985

MONUMENTATION:           Bolt                                  VM#:        16210
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Metal pipe                            OPUS PID:        
LATITUDE:   57° 32.3' N (  57.53830)          LONGITUDE: 153° 59.6' W (-153.99300)


The bench mark is a 5 cm (2") diameter steel plug screwed into the top of a 0.15
m (6") diameter steel pipe that runs down the pier on the north side of the Case
UP warehouse, 34 m (111 ft) SW from the SE corner of Larsen's Mercantile, 3.53 m
(11.6 ft) west from the north corner of a sliding door on the Case Up warehouse,
and 0.36 m (1.2 ft) west from where the pipe bends and enters the ground. 

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

                                                                                
Station ID: 9457724                         PUBLICATION DATE:  05/19/2010
Name:       LARSEN BAY, KODIAK ISLAND                         
            AK
NOAA Chart: 16599                           Latitude:   57° 32.0' N (  57.53330)
USGS Quad:  KODIAK (C-6)                    Longitude: 153° 59.4' W (-153.99000)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          945 7724 UNSTAMED 1
                         ALIAS:                NO STAMPING 1

MONUMENTATION:           Bolt                                  VM#:        16211
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Wooden post                           OPUS PID:        
LATITUDE:   57° 32.3' N (  57.53830)          LONGITUDE: 153° 59.6' W (-153.99300)


The bench mark is a head of a 9/16 in stainless steel lag screw driven
horizontally into the east side of a free standing 0.2 m x 0.2 m (8" x 8")
wooden post driven into the ground to an unknown depth, next to the north side
of the "Raven" bunkhouse, 13.71 m (45 ft) SW of NW corner of the "Sockeye"
bunkhouse, 4.15 m (13.6 ft) north from the NE corner of "Raven" bunkhouse, 1 m
(4 ft) north from the west wall of the building, and 1 m (3 ft) above ground
level.

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

                                                                                
Station ID: 9457724                         PUBLICATION DATE:  05/19/2010
Name:       LARSEN BAY, KODIAK ISLAND                         
            AK
NOAA Chart: 16599                           Latitude:   57° 32.0' N (  57.53330)
USGS Quad:  KODIAK (C-6)                    Longitude: 153° 59.4' W (-153.99000)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          945 7724 UNSTAMED 2
                         ALIAS:                NO STAMPING 2

MONUMENTATION:           Bolt                                  VM#:        16212
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Wooden piling                         OPUS PID:        
LATITUDE:   57° 32.3' N (  57.53830)          LONGITUDE: 153° 59.6' W (-153.99300)


The bench mark is a head of a stainless steel lag screw driven horizontally into
the east side of a wooden piling driven into the ground to an unknown depth,
along the north face of the Kodiak Salmon Packers  Inc. pier, 100 m (328 ft)
east of west end of pier, 1.50 m (4.9 ft) south of north edge of pier face and
0.25 m (0.8 ft) above pier deck



                         BENCH MARK STAMPING:  7724 D 2009
                         DESIGNATION:          945 7724 D

MONUMENTATION:           Tidal Station disk                    VM#:        19453
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Rock                                  OPUS PID#: BBBL07
LATITUDE:   57° 32.4' N (  57.54039)          LONGITUDE: 153° 58.7' W (-153.97881)


The bench mark is a disk set in the first rocky point NE of the Icicle Seafoods
Cannery, 1001.90 m (3,287 ft) NE of 945 7724 C, 165.50 m (543 ft) NW of the NW
most corner of the Russian Orthodox Church and 2.20 m (7.2 ft) above beach
level.

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

                                                                                
Station ID: 9457724                         PUBLICATION DATE:  05/19/2010
Name:       LARSEN BAY, KODIAK ISLAND                         
            AK
NOAA Chart: 16599                           Latitude:   57° 32.0' N (  57.53330)
USGS Quad:  KODIAK (C-6)                    Longitude: 153° 59.4' W (-153.99000)


                            T I D A L   D A T U M S 


Tidal datums at LARSEN BAY, KODIAK ISLAND based on:

     LENGTH OF SERIES:      2 MONTHS
     TIME PERIOD:           August 2009 - September 2009
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  9457804 ALITAK,  LAZY BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  4.189
     MEAN HIGH WATER                            MHW    =  3.907
     MEAN TIDE LEVEL                            MTL    =  2.199
     MEAN SEA LEVEL                             MSL    =  2.176
     MEAN LOW WATER                             MLW    =  0.492
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     7724 A 1995                                 6.068    2.162
     5 1964                                      6.054    2.147
     6 1964                                      6.019    2.112
     7724 B 1995                                 6.058    2.151
     7724 C 1995                                 6.061    2.154
     945 7724 G                                  6.172    2.265
     945 7724 UNSTAMED 1                         5.345    1.438
     945 7724 UNSTAMED 2                         6.274    2.367
     7724 D 2009                                 6.102    2.195


Foot Notes:

Bench marks 945 7724 G and 945 7724 UNSTAMED1 are 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  8 of  8

                                                                                
Station ID: 9457724                         PUBLICATION DATE:  05/19/2010
Name:       LARSEN BAY, KODIAK ISLAND                         
            AK
NOAA Chart: 16599                           Latitude:   57° 32.0' N (  57.53330)
USGS Quad:  KODIAK (C-6)                    Longitude: 153° 59.4' W (-153.99000)


                             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 9457724 Larsen Bay, Kodiak Island, AK, AK

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