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Details for Benchmark: GQ0293

N 36° 04.287 W 112° 09.277 (NAD 83)

Altitude: 7063

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

Location:
In COCONINO county, AZ View Original Datasheet
Designation:
KNOB
Marker Type:
triangulation station disk
Setting:
setting not listed - see description
Stability:

Reference Points

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Found this while geocaching...awesome view!!

Found while here visiting the USA from Australia on holidays.
We're at the Grand Canyon today exploring so did this while in the area.

Found while in the area. Not allowed to get to the tower, but you can see it clearly.

Fonud durin geocaching and enyoing the impressive sceenery.

Found while geocaching in the area

Cool spot for a BM. I am now wondering if other fire towers have had them

Found while touring the Grand Canyon

Found while geocaching in the canyon today.

Very cool benchmark!
TFTB

Found while Geocaching at the GC

Found while geocaching

Found it on a trip to Grand Canyon from Las Vegas.

[b]Benchmark Find #8[/b] - In good condition but with a little paint on it.
Found at N 36° 04.288 W 112° 09.278

[Photos:]
photoGQ0293

Found as described, near the SW corner leg of the former fire lookout tower. Visited site in company of gracious NPS staffer, as the area is marked off limits to visitors.

[Photos:]
photoGQ0293 KNOB 1920, closeup, Coconino County AZ
Located near SW leg of former fire lookout tower south of West Rim Drive on the Grand Canyon's South Rim. Lookout tower is visible at a distance, near the uranium mine headshaft tower.
photoGQ0293 KNOB 1920, view of mark looking north, AZ
Station in concrete monument is located to right of leftmost tower leg, almost appearing to be a support pier for the shed's left front corner. View is of south side of base of tower.

Found in good condition. The coordinates listed for this benchmark are those for Knob 2 and the coordinates for Knob 2 are for this one.

Coordinates for this benchmark should be N 36 04.300 W 112 09.283

[Photos:]
photoKNOB

Had lots of fun.

My wife, MayMay, and I went on a road trip to the Grand Canyon, both the North and South Rims. This is one of many benchmarks we found on our fantastic voyage to the Grand Canyon.

This benchmark is within walking distance of the popular scenic area, Hopi Point. It was interesting to see the nearby Forest Service Lookout Tower.

-Tizoc

[Photos:]
photoGCB GQ0293 Marker
photoGCB GQ0293 View

Documented History (by the NGS)

01/01/1920 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1920 (CLG) THE STATION IS NEAR THE SW CORNER OF THE FOREST SERVICE LOOKOUT TOWER WHICH IS ABOUT 2 MI. W OF THE EL TOVAR HOTEL AT GRAND CANYON, AND WHICH IS ABOUT 1/4 MI. FROM THE RIM OF THE CANYON. HEIGHT OF SIGNAL ABOVE STATION MARK - 11.69 M. NOTE--THE DISTANCES AND DIRECTIONS GIVEN ABOVE FOR THE REFERENCE MARKS WERE TAKEN IN THE TOWER AND WERE MEASURED TO THE INNER CORNER OF THE POSTS.
01/01/1934 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1934 (CP) STATION IS LOCATED ABOUT 1-1/2 MI. AIRLINE NW OF THE ATCHISON, TOPEKA AND SANTA FE RAILWAY DEPOT OF THE GRAND CANYON VILLAGE ON HOPI POINT, ABOUT 0.1 MI. W OF HERMIT RIM ROAD, AND UNDER THE FOREST SERVICE LOOKOUT TOWER. STATION WAS FOUND IN GOOD CONDITION, AND ONE NEW REFERENCE MARK WAS ESTABLISHED. TO REACH FROM THE SANTA FE DEPOT, TAKE THE HERMIT RIM ROAD AND GO 0.5 MI. AND KEEP TO THE RIGHT, CONTINUE FOR 1.3MI. AND TURN LEFT ON A GRAVELED ROAD, GO 0.1 MI. TO THE LOOKOUT TOWER AND STATION.
01/01/1956 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1956 RECOVERED IN GOOD CONDITION.
01/01/1972 by AZHD (GOOD)
RECOVERY NOTE BY ARIZONA HIGHWAY DEPARTMENT (NOW AZDT) 1972 GENERAL LOCATION ABOUT 1-1/2 MILES AIRLINE NW OF A.T. AND S.R. DEPOT OF GRAND CANYON VILLAGE AND 0.1 MILE W OF HERMIT RIM RD. TO REACH AS PER USC AND GS DESCRIPTIONS AND RECOVEREY NOTES STATION MARK STD USC AND GS BC SET IN CONC. STAMPED KNOB REFERENCE MARKS NO 1 STD USC AND GS BC NO 2 NOT OBSERVED AZIMUTH MARK NOT OBSERVED NOTE--ECCENTRIC STATION SET, TARGETED AND PHOTOGRAPHED FOR ORTHO. SEE SKETCH, REVERSE SIDE.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in August 1993.
  • 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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