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Details for Benchmark: FT1306

N 35° 13.606 W 117° 36.429 (NAD 83)

Altitude: 2888

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

Location:
In SAN BERNARDINO county, CA View Original Datasheet
Designation:
NORM
Marker Type:
survey disk
Setting:
setting not listed - see description
Stability:
Mark of questionable or unknown stability.

Reference Points

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N 35° 13.606 W 117° 36.429

North of Kramer Jct. on 395, rest of description good. Recovered in good condition.

[Photos:]
photoNorm

Documented History (by the NGS)

1/1/1977 by CADT (MONUMENTED)
DESCRIBED BY CALTRANS 1977 (RWH) THE STATION IS ABOUT 16 MILES NORTH OF BORON, 10 MILES SOUTHERLY OF RANDSBURG, SEC 20, T31S R41E MDM. TO REACH THE STATION FROM THE INTERSECTION OF US HIGHWAY 395 AND CALIFORNIA 58 (BEECHERS CORNERS) APPROXIMATELY 6 MILES EAST OF BORON, GO NORTH ON US HIGHWAY 395 FOR 16.6 MILES, (PASSING THE ENTRANCE TO BORON AIR FORCE BASE AT 6 MILES) TO THE STATION ON THE LEFT. POST MILE SBD 395 62.6. THE STATION MARK AND RM 1 ARE CALIFORNIA DIVISION OF HIGHWAYS DISKS IN OCTAGON SHAPED CONCRETE POST. THE STATION IS STAMPED---NORM 1977---299 FEET NORTH OF NORTHEAST CORNER TOWER 1246, 142.2 WEST-NORTHWEST OF PG AND E VALVE, 50.8 FEET WEST OF CENTERLINE 395, 4 FEET SOUTH OF A METAL WITNESS POST, 3.3 FEET EAST OF A BARBED WIRE FENCE, 0.4 FOOT LOWER THAN CENTERLINE 395, PROJECTS 0.2 FOOT ABOVE GROUND, 1 INCH X 30 INCH STEEL PIPE IN CONCRETE POST. REFERENCE MARK 1 IS STAMPED---NORM RM NO 1 1977---122 FEET WEST OF PG AND E VALVE, 48 FEET WEST OF CENTERLINE 395, 5.5 FEET EAST OF BARBED WIRE FENCE, 4 FEET NORTH OF A METAL WITNESS POST, 1.7 FEET LOWER THAN STATION, 0.5 FOOT HIGHER THAN CENTERLINE 395, PROJECTS 0.2 FOOT ABOVE GROUND. CGS BM T 289 1935 SERVES AS REFERENCE MARK 2 AND IS A CGS BENCH MARK DISK IN A 11 INCH SQUARE CONCRETE POST. DISK IS STAMPED---T 289 1935---IS 81.5 FEET NORTH-NORTHWEST OF PG AND E VALVE, 37 FEET EAST OF CENTERLINE 395, 9 FEET WEST OF BARBED WIRE FENCE, 4 FEET SOUTH OF A METAL WITNESS POST, 0.6 FOOT HIGHER THAN STATION, 0.2 FOOT HIGHER THAN CENTERLINE 395, PROJECTS 0.2 FOOT ABOVE GROUND.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in June 1996. The horizontal coordinates are valid at the epoch date displayed above. The epoch date for horizontal control is a decimal equivalence of Year/Month/Day.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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