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Details for Benchmark: GP0146

N 36° 10.600 W 111° 04.817 (NAD 83)

Altitude: 5209.38

Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED. (more info)

Location:
In COCONINO county, AZ View Original Datasheet
Designation:
E 50
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.

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Post is still hanging tough.

[Photos:]
photoGP0146 E 50 1934
photoGP0146 NNW

Recovered in good condition, but the concrete post is starting to get ragged around the edges. The witness post is still standing & the highway has been painted "E 50 with an arrow pointing to the station.

[This entry was edited by 2oldfarts (the rockhounders) on Saturday, April 15, 2006 at 6:42:17 PM.]

[Photos:]
photoE 50 Up Close view
photoE 50 on the Navajo Indian Reservation.
photoE 50 looking SW towards Mt. Peaks.
photoE 50 printed on the road with arrow-can't miss it.

Documented History (by the NGS)

1/1/1934 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1934 10.2 MI NE FROM TUBA CITY. 10.2 MILES NORTHEAST ALONG THE OLD TONALEA ROAD FROM TUBA CITY, COCONINO COUNTY, AT THE JUNCTION OF THE LOWER AND UPPER RED LAKE ROADS, 32 FEET SOUTHEAST OF THE CENTERLINE OF THE UPPER ROAD, 17 FEET NORTHWEST OF THE CENTERLINE OF THE LOWER ROAD, AND IN LINE WITH A ROW OF POLES. A STANDARD DISK, STAMPED E 50 1934 AND SET IN THE TOP OF A CONCRETE POST. NOTE-- TUBA CITY, JUNCTION OF U.S. HIGHWAY 164 AND STATE HIGHWAY 264. 9.0 MILES NORTHEAST OF ALONG U.S. HIGHWAY 164. 75 FT. NORTHWEST OF CENTERLINE OF HIGHWAY. PROJECTING 1.0 FT.
1/1/1983 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1983 RECOVERED IN GOOD CONDITION. A NEW DESCRIPTION FOLLOWS. 14.9 KM (9.25 MI) NORTHEASTERLY ALONG U.S. HIGHWAY 160 FROM ITS JUNCTION WITH STATE HIGHWAY 264 IN TUBA CITY, 96.3 METERS (316.0 FT) NORTHEAST OF MILEPOST 331, 36.9 METERS (121.1 FT) SOUTHEAST OF A FENCE AND 24.2 METERS (79.4 FT) NORTHWEST OF THE CENTERLINE OF THE HIGHWAY. THE MARK IS 0.3 METERS SW FROM A WITNESS POST. THE MARK IS 0.3 M BELOW THE HIGHWAY.

Control Text

  • 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.

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