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Details for Benchmark: DC0855

N 32° 43.983 W 117° 10.450 (NAD 83)

Altitude: 36.5

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

Location:
In SAN DIEGO county, CA View Original Datasheet
Designation:
1 ATSFRR
Marker Type:
bolt
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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I'm calling this one a DNF. I could not find a signal box 74 1/2' SE of the center of the Street and 10.8' NE of any rail. I do believe that the NE rail mentioned in the datasheet is the second rail from the left (SW) and that the other two rails to the NE were added for the Trolley at a later date.

Found this one, easy with the large wood supports around it

The coords were close enough for us to feel we got the right place. There were no numbers on the bolt which made sense because the equipment was all newer than the original date and possibly even the recovery notes dates. The description of the location matched: approximately 75 feet SE of the center line of the street and 11 feet NE of the NE rail of the NE track. It's also about a foot higher than the track.

[Photos:]
photoThe Bolt
photoBox 2-2664

I'm pretty sure this is the correct signal box, though none of them appeared to have ID numbers. We used the coordinates to find the correct railroad crossing, and then used the description to locate the correct signal box and bolt.

[Photos:]
photoSignal box

Documented History (by the NGS)

Unknown by ATSFRR (MONUMENTED)
01/01/1955 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1955 AT SAN DIEGO. AT SAN DIEGO, 1.3 MILES NORTHWEST ALONG THE ATCHISON TOPEKA AND SANTA FE RAILWAY FROM THE UNION STATION, AT THE PALM STREET CROSSING, IN THE TOP OF THE WEST CORNER OF THE CONCRETE BASE FOR SIGNAL BOX 2-2664, 74 1/2 FEET SOUTHEAST OF THE CENTER LINE OF THE STREET, 10.8 FEET NORTHEAST OF THE NORTHEAST RAIL OF THE NORTHEAST TRACK, AND ABOUT 1 FOOT HIGHER THAN THE TRAACK.
01/01/1967 by ATSFRR (GOOD)
RECOVERY NOTE BY ATCHISON TOPEKA AND SANTA FE RAILROAD 1967 RECOVERED IN GOOD CONDITION.
01/01/1990 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1990 (JBC) RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • 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 geoid height was determined by GEOID99.

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