Superseded Bench Mark Sheet for 9455151, CAMP COVE, HARRIS PENNINSULA AK

Present Epoch

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  6

                                                   PUBLICATION DATE:  12/12/2001
Station ID: 9455151                                SUPERCEDED DATE:   04/21/2003
Name:       CAMP COVE, HARRIS PENNINSULA                      
            ALASKA
NOAA Chart: 16682                                  Latitude:         59° 41.6' N
USGS Quad:  BLYING SOUND (D-8)                     Longitude:       149° 44.9' W


To reach the tidal benchmarks from Seward via boat, proceed SSE along
Resurrection Bay for 15 km (8 nm) to Calisto Head, then south along Resurrection
Bay for 32.5 km (17.6 nm) to Aialik Cape, then west across Aialik Bay 11.9 km
(6.4 nm) to the mouth of Camp Cove, then SSW along Camp Cove 1.9 km (1 nm) to a
small point of land which projects north from the mainland.  The benchmarks are
along the shoreline on both sides of the point.  The tide station was located on
the east side of the point of land.


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


                 PRIMARY BENCH MARK STAMPING:   
                         DESIGNATION:          945 5151 TIDAL 1
                         ALIAS:                BM 1

MONUMENTATION:           Survey disk                               VM#:    16385
AGENCY:                  U.S. Coastal & Geodetic Survey
                         (USC&GS)                                     PID:         
SETTING CLASSIFICATION:  Boulder


The primary benchmark is a disk set in top of a rocky islet, 170 m (558 ft) NW
of BM, 108 m (354 ft) NW of BM 4 1965, 49 m (161 ft) north of benchmark 5151 A
2000, and awash at mid tide.  



                         BENCH MARK STAMPING:  5151 A 2000
                         DESIGNATION:          945 5151 A

MONUMENTATION:           Tidal Station disk                        VM#:    16361
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Rock outcrop


The benchmark is a disk set in a rock outcrop near the tip of a small point, 132
m (433 ft) NW of BM, 112 m (367 ft) east of benchmark 5151 C 2000, 102 m (335
ft) NW of BM 5 1965, 65 m (213 ft) NW of BM 4 1965, 59 m (194 ft) NE of
benchmark 5151 B 2000, and 49 m (161 ft) south of bench mark 945 5151 TIDAL 1.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                   PUBLICATION DATE:  12/12/2001
Station ID: 9455151                                SUPERCEDED DATE:   04/21/2003
Name:       CAMP COVE, HARRIS PENNINSULA                      
            ALASKA
NOAA Chart: 16682                                  Latitude:         59° 41.6' N
USGS Quad:  BLYING SOUND (D-8)                     Longitude:       149° 44.9' W


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


                         BENCH MARK STAMPING:  5151 B 2000
                         DESIGNATION:          945 5151 B

MONUMENTATION:           Tidal Station disk                        VM#:    16362
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Rock outcrop


The benchmark is a disk set flush in a rock outcrop which is separated from the
mainland at high tide and in the middle of a rock and stone beach, 68 m (223 ft)
east of benchmark 9455151 C 2000, and 59 m (194 ft) SW of benchmark 5151 A 2000.



                         BENCH MARK STAMPING:  5151 C 2000
                         DESIGNATION:          945 5151 C

MONUMENTATION:           Tidal Station disk                        VM#:    16363
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Rock outcrop


The benchmark is a disk set in a rock outcrop where the shoreline orientation
changes from E-W to N-S, 102 m (335 ft) west of bench mark 5151 A 2000, and 68 m
(223 ft) west of 5151 B 2000.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                   PUBLICATION DATE:  12/12/2001
Station ID: 9455151                                SUPERCEDED DATE:   04/21/2003
Name:       CAMP COVE, HARRIS PENNINSULA                      
            ALASKA
NOAA Chart: 16682                                  Latitude:         59° 41.6' N
USGS Quad:  BLYING SOUND (D-8)                     Longitude:       149° 44.9' W


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


                         BENCH MARK STAMPING:  BM
                         DESIGNATION:          945 5151 TIDAL 2
                         ALIAS:                BM 2

MONUMENTATION:           Bolt                                      VM#:    16386
AGENCY:                  U.S. Coastal & Geodetic Survey
                         (USC&GS)                                     PID:         
SETTING CLASSIFICATION:  Rock outcrop


The benchmark is a 1/2 inch diameter copper bolt set in a sloping rock outcrop,
170 m (558 ft) SE of 945 5151 TIDAL 1, 132 m (432 ft) SE of benchmark 5151 A
2000, 68 m (223 ft) SE of BM 4 1965, 29.3 m (96.1 ft) SE of BM 5 1965, 3 m (10
ft) west of a 12" diameter overhanging spruce tree, 5m (15 ft) below the
vegetation line, and projecting about 0.006 m (0.02 ft) above the surface of the
rock.  



                         BENCH MARK STAMPING:  BM 4 1965
                         DESIGNATION:          945 5151 TIDAL 4

MONUMENTATION:           Survey disk                               VM#:    16387
AGENCY:                  U.S. Coastal & Geodetic Survey
                         (USC&GS)                                     PID:         
SETTING CLASSIFICATION:  Boulder


The benchmark is a disk bent on the edges and set on the top point of a rock
outcrop, 171 m (561 ft) SE of 945 5151 TIDAL 1, 68 m (223 ft) NW of BM, 65 m
(213 ft) SE of benchmark 5151 A 2000, 38.7 m (127.0 ft) NW of BM 5 1965, and
approximately 2 m (6 ft) below vegetation line.      

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                   PUBLICATION DATE:  12/12/2001
Station ID: 9455151                                SUPERCEDED DATE:   04/21/2003
Name:       CAMP COVE, HARRIS PENNINSULA                      
            ALASKA
NOAA Chart: 16682                                  Latitude:         59° 41.6' N
USGS Quad:  BLYING SOUND (D-8)                     Longitude:       149° 44.9' W


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


                         BENCH MARK STAMPING:  BM 5 1965
                         DESIGNATION:          945 5151 TIDAL 5

MONUMENTATION:           Survey disk                               VM#:    16388
AGENCY:                  U.S. Coastal & Geodetic Survey
                         (USC&GS)                                     PID:         
SETTING CLASSIFICATION:  Rock outcrop


The benchmark is a disk set flush in the tip of a rock point on a narrow ledge,
102 m (335 ft) SE of benchmark 5151 A 2000, 38.7 m (127.0 ft) SE of BM 4 1965,
and 29.3 m (96.1 ft) NW of BM.    

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                   PUBLICATION DATE:  12/12/2001
Station ID: 9455151                                SUPERCEDED DATE:   04/21/2003
Name:       CAMP COVE, HARRIS PENNINSULA                      
            ALASKA
NOAA Chart: 16682                                  Latitude:         59° 41.6' N
USGS Quad:  BLYING SOUND (D-8)                     Longitude:       149° 44.9' W


                            T I D A L   D A T U M S 


Tidal datums at CAMP COVE, HARRIS PENNINSULA based on:

     LENGTH OF SERIES:      2 MONTHS
     TIME PERIOD:           September 2000 - October 2000
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:  9455090 SEWARD, RESURRECTION BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  3.237
     MEAN HIGH WATER                            MHW    =  2.964
     MEAN SEA LEVEL                             MSL    =  1.696
     MEAN TIDE LEVEL                            MTL    =  1.688
     MEAN LOW WATER                             MLW    =  0.412
     MEAN LOWER LOW WATER                       MLLW   =  0.000



Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     945 5151 TIDAL 1                            1.854   -1.110
     5151 A 2000                                 5.301    2.337
     5151 B 2000                                 4.655    1.691
     5151 C 2000                                 3.251    0.287
     BM                                          2.623   -0.341
     BM 4 1965                                   3.886    0.922
     BM 5 1965                                   4.073    1.109


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

                                                   PUBLICATION DATE:  12/12/2001
Station ID: 9455151                                SUPERCEDED DATE:   04/21/2003
Name:       CAMP COVE, HARRIS PENNINSULA                      
            ALASKA
NOAA Chart: 16682                                  Latitude:         59° 41.6' N
USGS Quad:  BLYING SOUND (D-8)                     Longitude:       149° 44.9' W


                             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 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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