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Bench Mark Sheet for 9455777, BOULDER POINT 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  9

                                                                                
Station ID: 9455777                         PUBLICATION DATE:  12/17/2014
Name:       BOULDER POINT                                     
            AK
NOAA Chart: 16663                           Latitude:   60° 46.6' N (  60.77670)
USGS Quad:  FALSE PASS D-5                  Longitude: 151° 14.7' W (-151.24500)


This tertiary tide station is located 0.6 mile east of Boulder Point, on the
east side of Cook Inlet on the Kenai Peninsula.  The station is about 13.5 miles
NNW of the airport in Kenai, 48 miles SW of the Anchorage International Airport,
and 3 miles NE of Arness Dock.  The station was reached using an ATV from the
Arness Dock access road, and several other access tracks to the beach which take
off from the Nikiski to Captain Cook paved road.  ATV access is dependent on the
tides.         


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


                 PRIMARY BENCH MARK STAMPING:  5777 E 1998
                         DESIGNATION:          945 5777 E

MONUMENTATION:           Tidal Station disk                    VM#:        16068
AGENCY:                  LCMF, Inc.                            IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   60° 46.6' N (  60.77670)          LONGITUDE: 151° 14.7' W (-151.24500)


The bench mark is a disk set on the top of a 4 m x 2 m x 1 m (14 ft x 8 ft x 4
ft) high boulder, 74 m (242 ft) west of bench mark 5777 C 1998, and 21 m (68 ft)
from the base of the bluff. 

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  9

                                                                                
Station ID: 9455777                         PUBLICATION DATE:  12/17/2014
Name:       BOULDER POINT                                     
            AK
NOAA Chart: 16663                           Latitude:   60° 46.6' N (  60.77670)
USGS Quad:  FALSE PASS D-5                  Longitude: 151° 14.7' W (-151.24500)


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


                         BENCH MARK STAMPING:  5777 C 1998
                         DESIGNATION:          945 5777 C

MONUMENTATION:           Tidal Station disk                    VM#:        16066
AGENCY:                  LCMF, Inc.                            IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   60° 46.6' N (  60.77670)          LONGITUDE: 151° 14.7' W (-151.24500)


The bench mark is a disk set on the top of a 2 m x 2 m x 1 m (6 ft x 8 ft x 4
ft) high boulder, 90 m (295 ft) WSW of bench mark 5869 D 1998, 74 m (242 ft)
east of bench mark 5869 E 1998, 15 m (50 ft) from the base of the bluff.



                         BENCH MARK STAMPING:  5777 D 1998
                         DESIGNATION:          945 5777 D

MONUMENTATION:           Tidal Station disk                    VM#:        16067
AGENCY:                  LCMF, Inc.                            IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   60° 46.6' N (  60.77670)          LONGITUDE: 151° 14.7' W (-151.24500)


The bench mark is a disk set on the top of a 2 m x 4 m x 1 m (6 ft x 13 ft x 4
ft) high boulder, 90 m (295 ft) ENE of bench mark 5777 C 1998, 24 m (78 ft) NE
of bench mark 5777 D 1998, and 15 m (48 ft) from the base of the bluff.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  9

                                                                                
Station ID: 9455777                         PUBLICATION DATE:  12/17/2014
Name:       BOULDER POINT                                     
            AK
NOAA Chart: 16663                           Latitude:   60° 46.6' N (  60.77670)
USGS Quad:  FALSE PASS D-5                  Longitude: 151° 14.7' W (-151.24500)


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


                         BENCH MARK STAMPING:  F
                         DESIGNATION:          945 5777 F

MONUMENTATION:           Bolt                                  VM#:        16069
AGENCY:                  LCMF, Inc.                            IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   60° 46.6' N (  60.77670)          LONGITUDE: 151° 14.7' W (-151.24500)


The bench mark is a 1/2 inch diameter stainless steel bolt with hex head set
horizontally on the SE side of a 5 m x 6 m x 2 m (17 ft x 20 ft x 8 ft) high
boulder which is suspended 1 m (3 ft) beneath the SE corner by a small boulder,
51 m (167 ft) NNE of bench mark 5777 H 1998, 35 m (116 ft) from the base of the
bluff, 9 m (30 ft) south of bench mark 5777 G 1998, and 1 m (3 ft) above beach
level.



                         BENCH MARK STAMPING:  5777 G 1998
                         DESIGNATION:          945 5777 G

MONUMENTATION:           Tidal Station disk                    VM#:        16070
AGENCY:                  LCMF, Inc.                            IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   60° 46.6' N (  60.77670)          LONGITUDE: 151° 14.7' W (-151.24500)


The bench mark is a disk set on the top of a 6 m x 7 m x 2 m (20 ft x 22 ft x 8
ft) high boulder, 52 m (170 ft) NW of bench mark J, 49 m (160 ft) from the base
of the bluff, and 9 m (30 ft) north of bench mark F.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  9

                                                                                
Station ID: 9455777                         PUBLICATION DATE:  12/17/2014
Name:       BOULDER POINT                                     
            AK
NOAA Chart: 16663                           Latitude:   60° 46.6' N (  60.77670)
USGS Quad:  FALSE PASS D-5                  Longitude: 151° 14.7' W (-151.24500)


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


                         BENCH MARK STAMPING:  5777 H 1998
                         DESIGNATION:          945 5777 H

MONUMENTATION:           Tidal Station disk                    VM#:        16071
AGENCY:                  LCMF, Inc.                            IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   60° 46.6' N (  60.77670)          LONGITUDE: 151° 14.7' W (-151.24500)


The bench mark is a disk set on the top of a 3 m x 3 m x 1 m (9 ft x 9 ft x 4
ft) high boulder, 77 m (252 ft) WSW of bench mark J, 51 m (167 ft) SW of bench
mark F, and 30 m (100 ft) from the base of the bluff.



                         BENCH MARK STAMPING:  J
                         DESIGNATION:          945 5777 J

MONUMENTATION:           Bolt                                  VM#:        16072
AGENCY:                  LCMF, Inc.                            IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   60° 46.6' N (  60.77670)          LONGITUDE: 151° 14.7' W (-151.24500)


The bench mark is a 1/2 inch diameter bolt with hex head set horizontally on the
southwest face of a 2 m x 3 m x 2 m (8 ft x 10 ft x 6 ft) high boulder, 77 m
(252 ft) ENE of bench mark 5777 H 1998, 15 m (50 ft) SW of bench mark 5777 E
1998, and 9 m (30 ft) from the base of the bluff.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  9

                                                                                
Station ID: 9455777                         PUBLICATION DATE:  12/17/2014
Name:       BOULDER POINT                                     
            AK
NOAA Chart: 16663                           Latitude:   60° 46.6' N (  60.77670)
USGS Quad:  FALSE PASS D-5                  Longitude: 151° 14.7' W (-151.24500)


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


                         BENCH MARK STAMPING:  K
                         DESIGNATION:          945 5777 K

MONUMENTATION:           Bolt                                  VM#:        16073
AGENCY:                  LCMF, Inc.                            IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   60° 46.6' N (  60.77670)          LONGITUDE: 151° 14.7' W (-151.24500)


The bench mark is a 1/2 inch diameter stainless steel machine bolt with hex head
set horizontally on the southwestern face of a 6 m x 8 m x 2 m (20 ft x 25 ft x
8 ft) high boulder on which bench mark 5777 G 1998 is set, 47 m (155 ft) from
the base of the bluff,  8 m (27 ft) north of bench mark F, and 3 m (10 ft) SE of
bench mark 5777 G 1998.



                         BENCH MARK STAMPING:  L
                         DESIGNATION:          945 5777 L

MONUMENTATION:           Bolt                                  VM#:        16074
AGENCY:                  LCMF, Inc.                            IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   60° 46.6' N (  60.77670)          LONGITUDE: 151° 14.7' W (-151.24500)


The bench mark is a 1/2 inch diameter stainless steel machine bolt with hex head
set horizontally on the southeastern face of a 4 m x 5 m x 3 m (14 ft x 15 ft x
11 ft) high boulder, 61 m (200 ft) NE of bench mark 5777 H 1998, 46 m (150 ft)
west of bench mark 5777 E 1998, 35 m (115 ft) from the base of the bluff, and 1
m (2 ft) above beach level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  9

                                                                                
Station ID: 9455777                         PUBLICATION DATE:  12/17/2014
Name:       BOULDER POINT                                     
            AK
NOAA Chart: 16663                           Latitude:   60° 46.6' N (  60.77670)
USGS Quad:  FALSE PASS D-5                  Longitude: 151° 14.7' W (-151.24500)


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


                         BENCH MARK STAMPING:  5777 M 1999
                         DESIGNATION:          945 5777 M

MONUMENTATION:           Tidal Station disk                    VM#:        16075
AGENCY:                  LCMF, Inc.                            IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   60° 46.6' N (  60.77670)          LONGITUDE: 151° 14.7' W (-151.24500)


The bench mark is a disk set on the top of a 1 m x 2 m (4 ft x 5 ft) boulder, 69
m (225 ft) east of bench mark 5777 H 1998, 30 m (97 ft) SW of bench mark 5777 E
1998, 3 m (10 ft) south of brush line at high water, 1 m (2 ft) NE of a 1/2 inch
diameter rebar set vertically in the same boulder, and 0.3 m (1 ft) above the
ground.



                         BENCH MARK STAMPING:  5777 N 1999
                         DESIGNATION:          945 5777 N

MONUMENTATION:           Tidal Station disk                    VM#:        16076
AGENCY:                  LCMF, Inc.                            IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   60° 46.6' N (  60.77670)          LONGITUDE: 151° 14.7' W (-151.24500)


The bench mark is a disk set on the top of a 3 m x 4 m x 1 m (9 ft x 13 ft x 2
ft) high flat topped boulder, 66 m (215 ft) east of bench mark 5777 C 1998, 24 m
(78 ft) WSW of bench mark 5777 D 1998, 21 m (68 ft) from the base of the bluff,
and 1 m (4 ft) ESE of bench mark P in the same boulder.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  9

                                                                                
Station ID: 9455777                         PUBLICATION DATE:  12/17/2014
Name:       BOULDER POINT                                     
            AK
NOAA Chart: 16663                           Latitude:   60° 46.6' N (  60.77670)
USGS Quad:  FALSE PASS D-5                  Longitude: 151° 14.7' W (-151.24500)


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


                         BENCH MARK STAMPING:  P
                         DESIGNATION:          945 5777 P

MONUMENTATION:           Bolt                                  VM#:        16077
AGENCY:                  LCMF, Inc.                            IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   60° 46.6' N (  60.77670)          LONGITUDE: 151° 14.7' W (-151.24500)


The bench mark is a 1/2 inch diameter stainless steel machine bolt with hex head
set on the top of a 3 m    x 4 m x 1 m (9 ft x 13 ft x 2 ft) high flat topped
boulder, 66 m (215 ft) east of bench mark 5777 C 1998, 24 m (78 ft) WSW of bench
mark 5777 D 1998, 21 m (68 ft) from the base of the bluff, and 1 m (4 ft) WNW of
bench mark 5777 N 1999 in the same boulder.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  8 of  9

                                                                                
Station ID: 9455777                         PUBLICATION DATE:  12/17/2014
Name:       BOULDER POINT                                     
            AK
NOAA Chart: 16663                           Latitude:   60° 46.6' N (  60.77670)
USGS Quad:  FALSE PASS D-5                  Longitude: 151° 14.7' W (-151.24500)


                            T I D A L   D A T U M S 


Tidal datums at BOULDER POINT based on:

     LENGTH OF SERIES:      30 Days
     TIME PERIOD:           August 14 1999 - September 12 1999
     TIDAL EPOCH:           2007-2011
     CONTROL TIDE STATION:  9455760 NIKISKI, COOK INLET


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

     MEAN HIGHER HIGH WATER                     MHHW   =  6.428
     MEAN HIGH WATER                            MHW    =  6.216
     MEAN SEA LEVEL                             MSL    =  3.513
     MEAN TIDE LEVEL                            MTL    =  3.441
     MEAN LOW WATER                             MLW    =  0.666
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     5777 E 1998                                 6.266    0.050
     5777 C 1998                                 6.945    0.729
     5777 D 1998                                 5.590   -0.626
     F                                           4.486   -1.730
     5777 G 1998                                 4.917   -1.299
     5777 H 1998                                 5.900   -0.316
     J                                           6.831    0.615
     K                                           3.715   -2.501
     L                                           4.111   -2.105
     5777 M 1999                                10.086    3.871
     5777 N 1999                                 5.535   -0.681
     P                                           5.609   -0.607


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  9 of  9

                                                                                
Station ID: 9455777                         PUBLICATION DATE:  12/17/2014
Name:       BOULDER POINT                                     
            AK
NOAA Chart: 16663                           Latitude:   60° 46.6' N (  60.77670)
USGS Quad:  FALSE PASS D-5                  Longitude: 151° 14.7' W (-151.24500)


                             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 9455777 BOULDER POINT, AK

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