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Details for Benchmark: GP0603

N 36° 51.971 W 111° 34.875 (NAD 83)

Altitude: 3154

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

Location:
In COCONINO county, AZ View Original Datasheet
Designation:
LEES FERRY
Marker Type:
triangulation station disk
Setting:
in rock outcrop
Stability:

Must Read!

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Found:Good. Lee's Ferry is a fascinating place to walk and explore. The history of this area is incredible. After locating the Station, I only took the time to find RM2, but I believe that RM1 is still there.

[Photos:]
photoLEES FERRY RM2
photoGP0603 LEES FERRY 1947

During a walk along the river I stumbled across this benchmark

[Photos:]
photo

Setting depression filled with blown in dirt, but a bit of the cementing material could be seen.

[Photos:]
photoGP0603 LEES FERRY TRI
photoGP0603 RM 1
photoGP0603 RM 2
photoGP0603 RM 1 to STATION
LOOKING DOWNSTREAM TO LEES FERRY LAUNCH RAMP

Recovered in good condition. Found the Station disk and both RMs. Had to use the RMs to find the main disk since it was buried under the hard caliche clay.

[Photos:]
photoLees Ferry along the Colorado River in Arizona
photoLees Ferry RM1 in AZ
photoLees Ferry RM2
photoLees Ferry looking south
photoLees Ferry looking Northeast
photoLooking from Lees Ferry RM2 towards Station disk
photoLees Ferry looking southeast
photoLooking towards the launch ramp at Lee's Ferry

Found this benchmark after looking in the wrong spot. My wife even asked why I looked where I did to find it. I just said it felt right to be here. The GPS did locate the coords off about 30 feet or so.

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 located in a breath taking spot that is popular for river rafters.

-Tizoc

[Photos:]
photoGCB GP0603 Marker
photoGCB GP0603 View 1
photoGCB GP0603 View 2

Documented History (by the NGS)

01/01/1947 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1947 (CL) THE STATION IS LOCATED ABOUT 5 MILES DOWN THE RIVER FROM THE NAVAJO BRIDGE, 0.2 MILE UP STREAM FROM LEES FERRY CROSSING AND ON THE NORTH BANK OF THE COLORADO RIVER. THE MARK IS A STANDARD DISK STAMPED LEES FERRY 1947, SET IN OUTCROP, FLUSH. IT IS ABOUT 70 METERS NORTH OF THE RIVER, 200 METERS SOUTH OF THE RED BLUFF, 10 METERS SOUTH OF THE TRACK ROAD LEADING FROM THE FERRY TO THE HIGHWAY, AND ON A SMALL SANDSTONE KNOLL. REFERENCE MARK NO 1 IS A STANDARD DISK STAMPED LEES FERRY NO 1 1947, SET IN A LARGE RED BOULDER 10 BY 12 FEET AND ABOUT 10 FEET HIGH, 3 FEET NORTH OF THE SOUTH EDGE OF THE BOULDER, AND 2 FEET EAST OF THE WEST EDGE, ABOUT 3 FEET HIGHER THAN THE STATION. THE AZIMUTH MARK IS A STANDARD DISK STAMPED LEES FERRY 1947, SET IN ROCK, FLUSH. IT IS 200 METERS NORTH OF THE COLORADO RIVER, 200 FEET UP THE WEST BANK OF THE PARIA RIVER, 100 FEET WEST OF THE TRACK ROAD, AND ABOUT 30 FEET HIGHER THAN THE ROAD, 200 FEET FROM THE TOP OF THE HILL AND ABOUT 30 FEET LOWER THAN. TO REACH FROM THE STATION FOLLOW THE ROAD TOWARD MARBLE CANYON FOR 1/2 MILE AND THE MARK ON THE RIGHT (WEST) JUST AFTER CROSSING A CULVERT AND JUST BEFORE ROUNDING A BLUFF. REFERENCE MARK NO 2 IS A STANDARD DISK STAMPED LEES FERRY NO 2 1947, SET IN OUTCROP, FLUSH. IT IS 15 FEET SOUTH OF THE CENTER OF THE ROAD, AND 3 FEET LOWER THAN THE STATION, AND ON THE SAME BUTTE AS THE STATION. BM M-7 IS A STANDARD DISK STAMPED M-7 1921, 3147.684 FT., SET IN A BOULDER FLUSH. IT IS 0.1 MILE DOWN STREAM FROM THE FERRY, 300 METERS NORTHEAST OF THE RIVER, 13 METERS WEST OF A LOG CABIN, 10 METERS EAST OF A LOG HUT, AND 1 METER SOUTH OF A SMALL CAIRN WITH A PIPE STICKING OUT THE TOP. TO REACH THE STATION FROM THE WEST END OF THE NAVAJO BRIDGE GO WEST AND SOUTH FOR 1.0 MILE TO A TEXACO STATION ON THE RIGHT. TURN RIGHT (NORTH) JUST EAST OF THE STATION AND FOLLOW TRACK ROAD FOR 6.3 MILES TO A POINT 0.2 MILES UP STREAM FROM THE FERRY AND THE STATION ON A KNOLL ON THE RIGHT, AS DESCRIBED ABOVE.

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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