HO0251 - D58 1934
Visited the back roads of beautiful southern Utah and the Paiute Indian Reservation. Saw some pretty desert country. Found a few benchmarks. Got a speeding ticket. (Not recommended) On the plus side, the Officer was very nice.
Located in rural Washington County, Utah, this USC&GS mark lies alongside Old Highway 91. The USC&GS mark stamped "D58 1934" was found at 13:25, 06 January 2020 as described and in good condition. Recent surveying activities made locating the mark fairly easy. Go to description is adequate to find the mark.
The datasheet says the mark is set in a round concrete monument. When I found the mark, the concrete monument was square.
No new coordinates were taken with a GPSr.
Approximate location per the photos: N 37° 09.117', W 113° 47.780'
Approximate location per Google Earth: N 37° 09.142', W 113° 47.807'
Published Details for Benchmark: HO0251
N 37° 09.133 W 113° 47.767 (NAD 83)
Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED.
Location: In Washington County, UT
Designation: D 58
Marker Type: bench mark disk
Setting: set into the top of a round concrete monument
Stability: May hold, but of type commonly subject to surface motion.
Documented History (by the NGS)
01 Jan 34 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1934 15.6 MI W FROM ST GEORGE. 15.6 MILES WEST ALONG US HWY NO. 91. ON US HWY NO. 91. AT ABOUT THE CENTER OF A 1000 FT NORTH-SOUTH TANGENT, 100 FEET EAST OF A LARGE DRY WASH, 30 FEET EAST OF THE CENTERLINE OF THE HIGHWAY, AND ABOUT 60 FEET NORTH OF A 2 FOOT C.I. PIPE CULVERT WITH CONCRETE HEADWALLS.
01 Jan 82 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1982 RECOVERED IN GOOD CONDITION. NEW DESCRIPTION FOLLOWS. 17.4 KM (10.85 MI) WEST ALONG OLD US HIGHWAY 91 FROM THE CHURCH OF LATTER DAY SAINTS IN SANTA CLARA, AT THE WEST END OF A SANDY RIDGE, 0.35 KM (0.2 MI) NORTHEAST OF THE NORTHEAST END OF A CURVE, 9.0 METERS (29.5 FT) SOUTHEAST OF THE HIGHWAY CENTERLINE, 17.7 METERS (58 FT) NORTHEAST OF THE NORTHEAST END OF THE SOUTHEAST CONCRETE HEADWALL FOR A 24 INCH CORRUGATED METAL PIPE CULVERT, 10.0 METERS (33 FT) NORTHWEST OF THE RIGHT OF WAY FENCE. THE MARK IS 0.4 METERS SW FROM A WITNESS POST. THE MARK IS 0.1 M ABOVE THE HIGHWAY.
|HO0251 "D58 1934" - Benchmark detail.|
|HO0251 "D58 1934" - Benchmark setting in a square concrete monument.|
|HO0251 "D58 1934" - Benchmark setting on the southeast side of Old Highway 91. View southeasterly.|
|HO0251 "D58 1934" - Benchmark setting on the southeast side of Old Highway 91. View northeasterly.|
|HO0251 "D58 1934" - Benchmark setting on the southeast side of Old Highway 91. View northwesterly.|
|HO0251 "D58 1934" - Benchmark setting on the southeast side of Old Highway 91. View southwesterly.|
- The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
- The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
- The geoid height was determined by GEOID99.
- The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (G = 980.6199 gals.).
- The modeled gravity was interpolated from observed gravity values.