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Details for Benchmark: GQ0322

N 36° 59.994 W 112° 31.974 (NAD 83)

Altitude: 4893

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

Location:
In COCONINO county, AZ View Original Datasheet
Designation:
RILEY
Marker Type:
triangulation station disk
Setting:
set into the top of a round concrete monument
Stability:

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Recovered in good condition as described. It is set in a square concrete post, not a round post.

There are pottery shards scattered all around on the top of the mesa where the station mark is located.

[Photos:]
photoRILEY sta near the AZ/UT border.
photoRILEY view north into Utah
photoRILEY view east
photoRILEY view south
photoRILEY view west
photoRILEY RM1
photoRILEY RM1 view towards the station.
photoRILEY RM2
photoRILEY RM2 view towards the station.

Documented History (by the NGS)

01/01/1953 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1953 (LGT) THE STATION IS LOCATED 3-1/2 MILES, AIR-LINE, NORTH OF FREDONIA, ARIZONA, 3 MILES, AIR-LINE, SOUTH OF KANAB, UTAH, 1/2 MILE EAST OF THE COCONINO-MOHAVE COUNTY LINE, 100 YARDS SOUTH OF THE UTAH-ARIZONA STATE LINE AND 12 FEET WEST OF A WHITE WITNESS POST. IT IS ON THE NORTH POINT OF TWO POINTS ON A PROMINENT BUTTE ABOUT 0.1 MILE WEST OF U.S. HIGHWAY 89. TO REACH FROM THE CHECKING STATION ON THE SOUTH EDGE OF FREDONIA, GO NORTH ON U.S. HIGHWAY 89 FOR 3.9 MILES TO THE AZIMUTH MARK ON THE RIGHT. CONTINUE NORTH ON THE HIGHWAY FOR 0.1 MILE TO A GATE ON THE LEFT. TURN LEFT, PASS THROUGH THE GATE, TAKE THE CENTER ROAD OF THREE AND GO 0.1 MILE TO A CROSSROAD. TURN LEFT, LEAVE THE ROADS AND PICK WAY UP THE SLOPE FOR 0.2 MILE TO THE STATION. A DRIVE STATION. THE STATION MARK, A STANDARD DISK STAMPED RILEY 1953, IS SET IN THE TOP OF A SQUARE CONCRETE BLOCK WHICH PROJECTS 4 INCHES ABOVE THE GROUND. REFERENCE MARK 1, A STANDARD DISK STAMPED RILEY NO 1 1953, IS SET IN A DRILL HOLE IN OUTCROPPING BEDROCK WHICH IS FLUSH WITH THE GROUND. THE MARK IS ABOUT 3 FEET LOWER THAN THE STATION MARK. REFERENCE MARK 2, A STANDARD DISK STAMPED RILEY NO 2 1953, IS SET IN A DRILL HOLE IN OUTCROPPING BEDROCK WHICH IS FLUSH WITH THE GROUND. THE MARK IS ABOUT 18 INCHES LOWER THAN THE STATION MARK. THE AZIMUTH MARK, A STANDARD DISK STAMPED RILEY 1953, IS SET IN A DRILL HOLE IN OUTCROPPING BEDROCK WHICH IS FLUSH WITH THE GROUND ON THE NORTH, BUT PROJECTS 14 INCHES ABOVE THE GROUND ON THE SOUTH. THE MARK IS LOCATED 42 FEET EAST OF THE CENTER LINE OF U.S. HIGHWAY 89, 16 FEET NORTH OF A WHITE WITNESS POST AND 4 INCHES WEST OF A FENCE.
01/01/1972 by AZHD (GOOD)
RECOVERY NOTE BY ARIZONA HIGHWAY DEPARTMENT (NOW AZDT) 1972 GENERAL LOCATION-ABOUT 3-1/2 MILES, AIRLINE, N. OF FREDONIA, ARZ AND 3 MILES AIR-LINE S. OF KANAB, UTAH AND 1/2 MILE E OF THE COCONINO-MOHAVE COUNTY LINE TO REACH-AS PER USC AND GS DESCRIPTIONS AND RECOVERY NOTES STATION MARK-STD USC AND GS BC SET IN CONC. STAMPED RILEY 1953 REFERENCE MARKS-NO 1 AND NO 2 SET IN OUTCROPPING BEDROCK STAMPED RILEY NO 1 1953 AND RILEY NO 2 1953--COND GOOD AZIMUTH MARK-NOT OBSERVED

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in November 1997.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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