U.S. Coast and Geodetic Survey Benchmark EL0815 - Roff, OK
N 34° 37.601 W 096° 50.499
14S E 697860 N 3833762
U.S. Coast and Geodetic Survey Benchmark EL0815 is the ball at the apex of the water tower located in the block bounded by W Frisco Ave, S 9th St, S Broadway St, and an alley in Roff, OK.
Waymark Code: WM11WP6
Location: Oklahoma, United States
Date Posted: 12/30/2019
Views: 3
The tower is painted white, with "ROFF" in black and "TIGERS" in orange on the sides facing east and west. It is easily located, visible for some miles when traveling the Chickasaw Turnpike. As Geocaching.com's data sheet doesn't provide much in the way of a description, a 12/30/2019 datasheet query at ngs.noaa.gov (with a few minor edits) provides some information:
DESIGNATION - ROFF MUNICIPAL TANK
PID - EL0815
STATE/COUNTY- OK/PONTOTOC
COUNTRY - US
USGS QUAD - ROFF NORTH (1993)
*CURRENT SURVEY CONTROL
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* NAD 83(1993) POSITION- 34 37 35.95918(N) 096 50 29.78643(W) ADJUSTED
______________________________________________________________________
GEOID HEIGHT - -25.603 (meters) GEOID18
LAPLACE CORR - -2.52 (seconds) DEFLEC18
HORZ ORDER - THIRD
The horizontal coordinates were established by classical geodetic methods
and adjusted by the National Geodetic Survey in November 1994.
Significant digits in the geoid height do not necessarily reflect accuracy.
GEOID18 height accuracy estimate available here.
The Laplace correction was computed from DEFLEC18 derived deflections.
The following values were computed from the NAD 83(1993) position.
North East Units Scale Factor Converg.
SPC OK S - 144,069.132 706,216.499 MT 0.99993622 +0 39 27.1
SPC OK S - 472,666.81 2,316,978.63 sFT 0.99993622 +0 39 27.1
UTM 14 - 3,833,760.137 697,864.014 MT 1.00008257 +1 13 36.7
U.S. NATIONAL GRID SPATIAL ADDRESS: 14SPD9786433760(NAD 83)
SUPERSEDED SURVEY CONTROL
NAD 83(1986)- 34 37 35.96332(N) 096 50 29.77542(W) AD( ) 3
NAD 27 - 34 37 35.64600(N) 096 50 28.72800(W) AD( ) 3
USSD - 34 37 35.52800(N) 096 50 29.10300(W) AD( ) 3
Superseded values are not recommended for survey control.
NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
_MARKER: 53 = ELEVATED TANK
HISTORY - Date Condition Report By
HISTORY - 1920 FIRST OBSERVED CGS
HISTORY - 1934 GOOD CGS
HISTORY - 1954 GOOD CGS
STATION DESCRIPTION
DESCRIBED BY COAST AND GEODETIC SURVEY 1934 (CLG)
RECOVERED.
STATION RECOVERY (1954)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1954 (RAG)
THE STATION IS LOCATED NEAR THE CENTER OF TOWN AND ABOUT 0.05
MILE SOUTH OF STATE HIGHWAY NO. 12. IT HAS A CONICAL ROOF AND IS
SUPPORTED BY A 4-LEGGED STEEL STRUCTURE.
THE APPROXIMATE OVERALL HEIGHT IS 105 FEET.
THE BALL AT THE APEX WAS THE POINT OBSERVED UPON.
Condition: Mark found in good condition
Designation: ROFF MUNICIPAL TANK
Benchmark Agency: U.S. Coast & Geodetic Survey
Monumentation type: Elevated Tank
County: Pontotoc
USGS 7.5' Topographic Quadrangle Name (optional): Roff North
Find type: Found by luck/skill/knowledge
Web address of this benchmark's datasheet (optional): [Web Link]
NGS PID: EL0815
Benchmark Agency (if other): Not listed
Monumentation type (if other): Not listed
Special category (optional): Not listed
Special Category (if other): Not listed
Local database's URL (optional): Not listed
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