U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 8418606 PUBLICATION DATE: 04/21/2003
Name: CAMP ELLIS, SACO RIVER
ME
NOAA Chart: 13287 Latitude: 43° 27.7' N ( 43.46170)
USGS Quad: BIDDEFORD Longitude: 70° 22.9' W ( -70.38170)
To reach the bench marks from the intersection of U.S. Route 1 and State Route 9
in Saco, proceed east on State Highway 9 for 6.6 km (4.1 mi) to Camp Ellis
Avenue, turn right and proceed 0.2 km (0.1 mi) to Main Avenue, then turn left
onto Main Avenue and continue for 0.3 km (0.2 mi) to North Avenue, turn right
and proceed 0.3 km (0.2 mi) to the Camp Ellis Fishing Pier. The bench marks are
in the vicinity of the fishing pier and the tide gage and staff were on the SW
corner of the pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 8606 A 1991
DESIGNATION: 841 8606 A
MONUMENTATION: Tidal Station disk VM#: 12007
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete retaining wall OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The primary bench mark is a disk set in the SSW corner of the concrete retaining
wall at the Camp Ellis Fishing Pier, 15.33 m (50.3 ft) WNW of the utility pole
located at the south end of the Deep Sea Fishing Cruise Office, 11.98 m (39.3
ft) ENE of the light pole located in the SSW corner of the pier, and 6.71 m
(22.0 ft) SSW of the north end of the retaining wall at the fishing pier.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 8418606 PUBLICATION DATE: 04/21/2003
Name: CAMP ELLIS, SACO RIVER
ME
NOAA Chart: 13287 Latitude: 43° 27.7' N ( 43.46170)
USGS Quad: BIDDEFORD Longitude: 70° 22.9' W ( -70.38170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8606 B 1991
DESIGNATION: 841 8606 B
MONUMENTATION: Tidal Station disk VM#: 12008
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete slab OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk set in the porch of an apartment house located at the
SE corner of the intersection of Beach and Eastern Avenues, 29.96 m (98.3 ft)
WNW of utility pole NET&T Co. 13 on Beach Avenue, 13.26 m (43.5 ft) south of
utility and light pole NET&T Co J3, 0.91 m (3.0 ft) SW of the NE edge of the
porch, and 0.09 m (0.3 ft) above ground.
BENCH MARK STAMPING: 8606 C 1991
DESIGNATION: 841 8606 C
MONUMENTATION: Tidal Station disk VM#: 12009
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete wall OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk set in the highest level of a concrete wall located on
the north side of the end of Bay Avenue, 27.92 m (91.6 ft) east of the piling at
the east side of the driveway at #23 Bay Avenue, 22.31 m (73.2 ft) SSE of
utility pole NET&T 3 at the east end of Bay Avenue, 3.84 m (12.6 ft) WNW of the
piling at the ESE corner of the concrete wall, and 0.85 m (2.8 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 8418606 PUBLICATION DATE: 04/21/2003
Name: CAMP ELLIS, SACO RIVER
ME
NOAA Chart: 13287 Latitude: 43° 27.7' N ( 43.46170)
USGS Quad: BIDDEFORD Longitude: 70° 22.9' W ( -70.38170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8606 D 1991
DESIGNATION: 841 8606 D
MONUMENTATION: Tidal Station disk VM#: 12010
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete retaining wall OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk set in the concrete retaining wall located in front of
#8 Riverside Avenue, 25.02 m (82.1 ft) east of utility pole NET&T 2210 at the
east corner of #3 Riverside Avenue, 13.62 m (44.7 ft) north of utility pole
NET&T J2 at the north corner of #9 Riverside Avenue, 2.96 m (9.7 ft) WNW of the
ESE corner of the retaining wall, and 0.67 m (2.2 ft) above ground.
BENCH MARK STAMPING: WALL
DESIGNATION: 841 8606 WALL
MONUMENTATION: Survey disk VM#: 12011
AGENCY: US Army Corps of Engineers (USE) IDB PID#:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk set in the SW corner of a concrete sea wall located at
#56 Camp Ellis Avenue, 21.79 m (71.5 ft) SSW of the SW corner of the garage,
13.50 m (44.3 ft) west of the west porch corner of the house, 0.67 m (2.2 ft)
ESE of the west end of the sea wall, and 0.46 m (1.5 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 8418606 PUBLICATION DATE: 04/21/2003
Name: CAMP ELLIS, SACO RIVER
ME
NOAA Chart: 13287 Latitude: 43° 27.7' N ( 43.46170)
USGS Quad: BIDDEFORD Longitude: 70° 22.9' W ( -70.38170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8606 E 1991
DESIGNATION: 841 8606 E
MONUMENTATION: Tidal Station disk VM#: 12012
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete sewer cap OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk set in the SW area of a 4 m (12 ft) diameter concrete
sewer cap located at the SW corner of the intersection of Ferry Road, Seaside
Avenue, Camp Ellis Avenue, and Lower Beach Road, across Camp Ellis Avenue from a
church, 44 m (144 ft) north of power pole #FL-86 on the south side of Camp Ellis
Avenue near the church, 36 m (117 ft) SW of power pole #157 on the west side of
Ferry Road, and 8 m (25 ft) west of power pole #158 at the intersection.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 8418606 PUBLICATION DATE: 04/21/2003
Name: CAMP ELLIS, SACO RIVER
ME
NOAA Chart: 13287 Latitude: 43° 27.7' N ( 43.46170)
USGS Quad: BIDDEFORD Longitude: 70° 22.9' W ( -70.38170)
T I D A L D A T U M S
Tidal datums at CAMP ELLIS, SACO RIVER based on:
LENGTH OF SERIES: 3 Months
TIME PERIOD: July 1991 - September 1991
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8418150 PORTLAND, CASCO BAY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 2.951
MEAN HIGH WATER MHW = 2.820
MEAN SEA LEVEL MSL = 1.470
MEAN TIDE LEVEL MTL = 1.461
MEAN LOW WATER MLW = 0.102
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
8606 A 1991 4.799 1.979
8606 B 1991 4.848 2.028
8606 C 1991 5.818 2.998
8606 D 1991 6.119 3.299
WALL 4.576 1.756
8606 E 1991 4.667 1.847
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 8418606 PUBLICATION DATE: 04/21/2003
Name: CAMP ELLIS, SACO RIVER
ME
NOAA Chart: 13287 Latitude: 43° 27.7' N ( 43.46170)
USGS Quad: BIDDEFORD Longitude: 70° 22.9' W ( -70.38170)
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.