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Details for Benchmark: QZ0589

N 45° 20.539 W 114° 34.503 (NAD 83)

Altitude: 8172

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

Location:
In LEMHI county, ID View Original Datasheet
Designation:
LONG TOM 2
Marker Type:
survey disk
Setting:
in a boulder
Stability:

Reference Points

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Documented History (by the NGS)

01/01/1958 by USGS (MONUMENTED)
DESCRIBED BY US GEOLOGICAL SURVEY 1958 REPLACES DESTROYED STATION LONG TOM MTN USFS. NGS DESCRIPTION FOLLOWS. LOCATED ABOUT 35 MI WNW. OF SALMON, ABOUT 15 MI WSW. OF SHOUP, ABOUT 3.25 MI NNE. OF JCT. OF SALMON AND MIDDLE FORK RIVERS. ON TOP OF PARTLY-TIMBERED ROCKY MOUNTAIN KNOWN AS LONG TOM MOUNTAIN AT HEAD OF LONG TOM CREEK, IN BEDROCK OUTCROP 6 FT N. OF ROCK CLIFF AND 4 FT S. OF SOUTHEAST CORNER OF LOT. TO REACH FROM POST OFFICE AND STORE AT NORTH FORK 21.55 MI N. OF SALMON ON U.S. HWY. 93, GO 10.5 MI W. ALONG NORTH SIDE OF SALMON RIVER ON GRADED RD. TO INDIANOLA RANGER STATION, CONTINUE STRAIGHT AHEAD ON RIVER RD. 6.5 MI TO SIDE RD. RIGHT AT SIGN SPRING CREEK. TURN RIGHT (N.) OFF RIVER RD. FOLLOWING FOREST RD. UP CANYON 2.25 MI TO FORK (LOG CABIN AND FIELD IN CENTER). TAKE LEFT FORK UP CANYON AND MOUNTANSIDE 11.8 MI TO FORK AND SIGN SALMON RIVER AND SHOUP. TAKE RIGHT FORK 0.3 MI TO FORK. TAKE LEFT FORK 0.35 MI TO FORK. TAKE LEFT LOWER FORK (RIGHT UPPER FORK GOES TO BLUE NOSE LO CABIN WHICH CAN BE SEEN) 2.05 MI TO FORK. TAKE SHARP LEFT FORK AS PER SIGN LONG TOM LOOKOUT 5.2 MI TO FORK. TAKE RIGHT FORK ON MAIN-TRAVELED RD. 0.4 MI TO FORK. TAKE LEFT FORK AS PER SIGN LONG TOM 9.3 MI TO FORK. TAKE LEFT FORK AS PER SIGN LONG TOM 1.75 MI. KEEP LEFT (STRAIGHT AHEAD) 2.55 MI TO END OF TRUCK TRAVEL AT LO CABIN AND STATION JUST S. OF LO. STATION MARK--STANDARD TABLET STAMPED---LONG TOM NO 2 1958---, IN ROCK ABOUT 8 FT E. OF DESTROYED STATION LONG TOM MTN USFS. RM 1--NGS RM DISK STAMPED---LONG TOM MTN USFS 1945 NO 1---. RM 2--NGS RM DISK STAMPED---LONG TOM MTN USFS 1945 NO 2---. LONG TOM LOH--NOT DESCRIBED.
01/01/1961 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1961 RECOVERED AS DESCRIBED. ALL MARKS IN GOOD CONDITION. STATION REACHED BY HELICOPTER.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in July 1992.
  • 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.