U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
PUBLICATION DATE: 06/13/1984
Station ID: 8672696 SUPERCEDED DATE: 04/21/2003
Name: KILKENNY CLUB, KILKENNY CREEK
GEORGIA
NOAA Chart: 11511 Latitude: 31° 47.3' N
USGS Quad: OAK LEVEL Longitude: 81° 12.2' W
To reach the tidal bench marks from the intersection of I-95 and State Road 144
south of Savannah, travel south on SR-144 to the town of Keller. Continue south
on SR-144, 3 miles (4.8 km) to a dirt road on the east (left side) of the road
which leads to the Kilkenny Club on Kilkenny Creek Tributary of the Bear River.
The bench marks are located on both sides of the dirt road leading to the dock
at the Kilkenny Club. The tide gage and staff were located on the south side of
the dock.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: KILKENNY 1933
MONUMENTATION: Survey Disk VM#: 4745
AGENCY: PID#: BR0574
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set flush in top of a 1x1 foot concrete pad located at the
Kilkenny Club on Kilkenny Creek, 178.5 feet (54.4 m) SE of the SE corner of
porch of the hunting lodge, 143 feet (43.6 m) SE of Bench Mark Kilkenny 1933 NO
3 1968, and 34 feet (10.4 m) west of the bluff bank, set 2 inches (0.1 m) below
surface.
BENCH MARK STAMPING: KILKENNY NO 1 1933
MONUMENTATION: Survey Disk VM#: 4746
AGENCY: PID#: BR0575
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set flush in top of a 1x1 foot concrete pad located at the
Kilkenny Club on Kilkenny Creek, 375 feet (114.3 m) SSW of Bench Mark Kilkenny
1933 NO 3 1968, 365 feet (11.2 m) west of the bluff bank, 89.5 feet (27.3 m)
east of NE corner of barn, 15 feet (4.6 m) east of a 0.8 foot (0.2 m) diameter
cedar tree, and 2 feet (0.6 m) north of a fence line.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
PUBLICATION DATE: 06/13/1984
Station ID: 8672696 SUPERCEDED DATE: 04/21/2003
Name: KILKENNY CLUB, KILKENNY CREEK
GEORGIA
NOAA Chart: 11511 Latitude: 31° 47.3' N
USGS Quad: OAK LEVEL Longitude: 81° 12.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: KILKENNY 1933 NO 3 1968
MONUMENTATION: Survey Disk VM#: 4747
AGENCY: PID#: AA9448
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set flush in top of a concrete monument located at the
Kilkenny Club on Kilkenny Creek. 143 feet (43.6 m) NW of a 3.3 foot (1.0 m)
diameter oak tree, 77 feet (23.5 m) NE of centerline of dirt road, 67.5 feet
(20.6 m) south of SE corner of porch of the hunting lodge, 22 feet (6.7 m) NE of
a 3.3 foot (1.0 m) diameter oak tree.
BENCH MARK STAMPING: 2696 D 1977
MONUMENTATION: Survey Disk VM#: 4748
AGENCY: PID:
SETTING CLASSIFICATION: Copper Clad Steel Rod
The bench mark is located at the Kilkenny Club on Kilkenny Creek, 101 feet (30.8
m) SSE of Bench Mark Kilkenny 1933, 25.5 feet (7.8 m) NNE of the NE corner of
the Kilkenny Club store, and 10 feet (3.0 m) west of the bluff bank overlooking
Kilkenny Creek. The mark is crimped to the top of a copper-clad steel rod
driven 48 feet (14.6 m) to refusal surrounded by a concrete kickblock, set 1
inch (0.1 m) below ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
PUBLICATION DATE: 06/13/1984
Station ID: 8672696 SUPERCEDED DATE: 04/21/2003
Name: KILKENNY CLUB, KILKENNY CREEK
GEORGIA
NOAA Chart: 11511 Latitude: 31° 47.3' N
USGS Quad: OAK LEVEL Longitude: 81° 12.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2696 E 1977
MONUMENTATION: Survey Disk VM#: 4749
AGENCY: PID:
SETTING CLASSIFICATION: Copper Clad Steel Rod
The bench mark is located at the Kilkenny Club on Kilkenny Creek, 245.5 feet
(74.8 m) SSW of Bench Mark Kilkenny 1933 NO 3 1968, 126 feet (38.4 m) NE of
Bench Mark Kilkenny NO 1 1933, and 4 feet (1.2 m) west of NW corner post of
picnic pavilion. The mark is crimped to the top of a copper-clad steel rod
driven 48 feet (14.6 m) to refusal encased in a concrete kickblock, set 1-inch
(0.1 m) below ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
PUBLICATION DATE: 06/13/1984
Station ID: 8672696 SUPERCEDED DATE: 04/21/2003
Name: KILKENNY CLUB, KILKENNY CREEK
GEORGIA
NOAA Chart: 11511 Latitude: 31° 47.3' N
USGS Quad: OAK LEVEL Longitude: 81° 12.2' W
T I D A L D A T U M S
Tidal datums at KILKENNY CLUB, KILKENNY CREEK based on:
LENGTH OF SERIES: 68 HIGHS & 68 LOWS
TIME PERIOD: MARCH 10 - APRIL 13, 1977
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8720030 FERNANDINA BEACH, FLORIDA
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (04/04/1977) = 9.13
MEAN HIGHER HIGH WATER MHHW = 8.11
MEAN HIGH WATER MHW = 7.73
MEAN TIDE LEVEL MTL = 3.97
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 3.75
MEAN LOW WATER MLW = 0.20
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (04/05/1977) = -3.00
* NGVD reference based on adjustment of 1963 and NOS levels of 1977.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
KILKENNY 1933 13.84 6.11
KILKENNY NO 1 1933 16.56 8.83
KILKENNY 1933 NO 3 1968 15.05 7.32
2696 D 1977 14.38 6.65
2696 E 1977 15.14 7.41
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
PUBLICATION DATE: 06/13/1984
Station ID: 8672696 SUPERCEDED DATE: 04/21/2003
Name: KILKENNY CLUB, KILKENNY CREEK
GEORGIA
NOAA Chart: 11511 Latitude: 31° 47.3' N
USGS Quad: OAK LEVEL Longitude: 81° 12.2' 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.