2017-04-08

AE4848 "S 1164 RESET" 1997

I found near the entrance to the airport in Independence, Ca. as described and in good condition.  The mark is described as being "set in the top of a concrete post projecting 0.5 foot above the ground", but I didn't find the mark immediately as I expected.  Over time, topsoil had moved in and covered everything.  Thankfully, close calls to the fence and witness post showed me where to look.  After kicking the dirt around for a few minutes, the mark was exposed.  I covered it back up before I left.

The published altitude of the mark is 3903.7, but my GPSr initially showed and elevation of 4000+ feet.  There was good satellite coverage, but the thick tree cover probably caused some problems.  After a few minutes, the GPSr was able to settle down and show an elevation of 3900'. 
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Published Details for Benchmark: AE4848
N 36° 48.583 W 118° 12.267 (NAD 83)
Altitude: 3903.7

Coordinates may not be exact. Altitude is RESET and location is SCALED.

Location: In INYO county, CA (View Original Datasheet)
Designation: S 1164 RESET
Marker Type: vertical control 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)
01/01/1997 by CADT (MONUMENTED)
DESCRIBED BY CALTRANS 1997 (KR) 0.4 MILE (0.6 KM) NORTHWEST FROM INDEPENDENCE, 0.45 MILE (0.72 KM) NORTHWEST ALONG US HIGHWAYS 395 AND 6 FROM THE COUNTY COURTHOUSE AT INDEPENDENCE. AT THE MAIN ENTRANCE TO THE INDEPENDENCE AIRPORT, IN A EAST-WEST ROW OF TREES, 111.5 FEET (34.0 M) EAST OF THE CENTERLINE OF THE HIGHWAY, 73.0 FEET (22.3 M) SOUTH-SOUTHEAST OF THE CENTER OF THE ENTRANCE OF THE AIRPORT, 85.0 FEET (25.9 M) EAST OF POWER POLE NO. XP4-102 WITH A GUY WIRE, 1.6 FEET (0.5 M) NORTH-NORTHEAST OF A FENCE, 1.6 FEET (0.5 M) SOUTH-SOUTHEAST OF A WITNESS POST, SET IN THE TOP OF A CONCRETE POST PROJECTING 0.5 FOOT (15.2 CM) ABOVE THE GROUND. N 88 DEGREES W 74.7 FEET (22.8 M) TO TOP OF FIRE HYDRANT, S 66 DEGREES W 111.5 FEET (34.0 M) TO POWER POLE NO. XP4-102 WITH GUY WIRE, N 56 DEGREES E 66.7 FEET (20.3 M) TO POWER POLE NO. M26380V WITH GUY WIRE.

AE4848 "S 1164 RESET" 1997 - Benchmark detail.
AE4848 "S 1164 RESET" 1997 - Benchmark and GPSr.
AE4848 "S 1164 RESET" 1997 - Benchmark setting and witness post.  The mark was found under 3 inches of topsoil.
AE4848 "S 1164 RESET" 1997 - Benchmark location setting and witness post.  The mark was found under 3 inches of topsoil.  View southeasterly.
AE4848 "S 1164 RESET" 1997 - Benchmark location setting and witness post.  The mark was found under 3 inches of topsoil.  View southwesterly.
AE4848 "S 1164 RESET" 1997 - Benchmark and GPSr.  View northeasterly toward the Independence Airport.
AE4848 "S 1164 RESET" 1997 - Benchmark coordinates and settled elevation.