P 137 RESET

*CURRENT SURVEY CONTROL (Retrieval Date = May 1, 1998)

* NAD 83(1992)- 40 57 11.96641(N) 105 20 58.13751(W) ADJUSTED

* NAVD 88 - 2145.99 (meters) 7040.6 (feet) LEVELING

X - -1,277,365.454 (meters) COMP
Y - -4,653,467.898 (meters) COMP
Z - 4,159,907.854 (meters) COMP

LAPLACE CORR- -12.76 (seconds) DEFLEC96
ELLIP HEIGHT- 2133.05 (meters) GPS OBS
GEOID HEIGHT- -13.03 (meters) GEOID96
HORZ ORDER - FIRST
VERT ORDER - THIRD ?
ELLP ORDER - FOURTH CLASS I

The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in March 1998.

The orthometric height was determined by differential leveling. The vertical network tie was performed by a horz. field party for horz. obs reductions. Reset procedures were used to establish the elevation.

The X, Y, and Z were computed from the position and the ellipsoidal ht.

The Laplace correction was computed from DEFLEC96 derived deflections.

The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.

The geoid height was determined by GEOID96.

North East Units Scale Converg.

SPC CO N - 1,590,185.24 3,041,578.44 sFT 1.00003201 +0 05 50.1
SPC CO N - 484,689.430 927,074.964 MT 1.00003201 +0 05 50.1
UTM 13 - 4,533,634.400 470,587.224 MT 0.99961065 -0 13 44.6

SUPERSEDED SURVEY CONTROL

NGVD 29 - 2144.89 (meters) 7037.0 (feet) RESET

Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file format.dat to determine how the superseded data were derived.

MARKER: DB = BENCH MARK DISK
SETTING: 80 = SET IN A BOULDER
STAMPING: P 137 RESET 1958
STABILITY: C = May hold, but of type commonly subject to surface motion
SATELLITE: The site location was reported as suitable for satellite observations - February 25, 1997

HISTORY - Date Condition Recov. By

HISTORY - 1958 MONUMENTED CODH

HISTORY - 1938 GOOD NGS

HISTORY - 19970225 GOOD CODOT

STATION DESCRIPTION

DESCRIBED BY NATIONAL GEODETIC SURVEY 1938 AT VIRGINIA DALE. AT VIRGINIA DALE, 320 FEET SOUTHWEST OF THE POST OFFICE AND STORE, 230 FEET SOUTHEAST OF THE SUMMIT OF A RIDGE DIRECTLY OPPOSITE THE POST OFFICE, 130 FEET SOUTH OF THE CENTERLINE OF U.S.HIGHWAY 287, IN THE TOP OF A GRANITE ROCK. LOCATIONS FROM ORIGINAL, P 137 MARK, 354 FEET, SOUTH 36 DEG. 30 FEET E. MAGNETIC BEARING. THE NEW DISK IS 20 FEET SOUTH OF A PINE TREE, 6 FEET SOUTH OF PRESENT RIGHT-OF-WAY FENCE.

Station Recovery (1997)

RECOVERY NOTE BY COLORADO DEPARTMENT OF TRANSPORTATION 1997 (RSC) THE STATION IS LOCATED ABOUT 21.5 MI (34.6 KM) NORTHWEST OF TEDS PLACE, 3 MI (4.8 KM) SOUTH OF THE COLORADO-WYOMING STATE LINE AND IN THE VILLAGE OF VIRGINIA DALE, IN THE NORTHEAST 1/4 OF SECTION 4, T 11 N, R 71 W, AT U. S. HIGHWAY 287 MILEPOST 380.45. OWNERSHIP-- TO REACH THE STATION FROM THE INTERSECTION OF U. S. HIGHWAY 287 AND STATE HIGHWAY 14 AT TEDS PLACE, GO NORTHERLY ON U. S. HIGHWAY 287 FOR 24.6 MI (39.6 KM) TO THE STATION ON THE LEFT, OPPOSITE THE OLD VIRGINIA DALE CAFE IN VIRGINIA DALE THE MARK IS A STANDARD DISK SET IN A DRILL HOLE IN A GRANITE BOULDER MEASURING 1.7 M (5.6 FT) BY 1.1 M (3.6 FT) AND PROJECTING 40 CM ABOVE THE GROUND. IT IS 43.0 M (141.1 FT) SOUTH-SOUTHEAST FROM THE CNETER OF A DIRT ROAD INTERSECTION WITH U. S. HIGHWAY 287, 39.4 M (129.3 FT) SOUTH FROM THE CENTER LINE OF THE HIGHWAY, 23.0 M (75.5 FT) NORTH-NORTHEAST FROM A BURIED CABLE POST, 9.7 M (31.8 FT) SOUTH-SOUTHWEST FROM A 16-INCH PINE TREE IN THE RIGHT-OF-WAY, 1.5 M (4.9 FT) SOUTH FROM A WITNESS POST AND 1.2 M (3.9 FT) SOUTHWEST FROM A RIGHT-OF-WAY FENCE.