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Details for Benchmark: DX3797

N 33° 57.602 W 117° 16.755 (NAD 83)

Altitude: 0

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

Location:
In RIVERSIDE county, CA View Original Datasheet
Designation:
AIRWAY BCN 6 BOX SPRINGS MTN
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:

Must Read!

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Unusual benchmark. There are very few original Airway Beacon towers still surviving. After some on-line research, I believe that this mark is one of them. The description and position (as best I was able to determine with consumer GPS receiver) seem to match with the original 1950 monumenting.

I originally logged this as a find, but when preparing to do the recovery submission for the NGS database, I had second thoughts. After re-reading the original NGS datasheet, I realized that the station mark was actually the beacon itself, which is gone. The target used for the survey was actaully the light of the beacon (commonly done at night in those days). Therefore, on 1-22-2006, for technical reasons, I have to classify this benchmark as destroyed.

Future finders please do the same.

[This entry was edited by Klemmer & TeddyBearMama on Sunday, January 22, 2006 at 10:43:39 AM.]

[Photos:]
photoAn Airway Beacon from 1950
Not very many of these surviving.
photoLower structure
Important to include here for matching structure to description.

Documented History (by the NGS)

01/01/1950 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1950 (JCE) THE STATION IS ABOUT 3 MILES EAST OF RIVERSIDE, 1-1/4 MILES NORTH-NORTHEAST OF THE JUNCTION OF U.S. HIGHWAYS 60 AND 395, ON THE SUMMIT OF BOX SPRINGS MOUNTAIN WHICH IS THE FIRST PROMINENT MOUNTAIN EAST OF RIVERSIDE. THE BEACON IS A STANDARD CAA ROTATING LIGHT (WHITE ONLY) ON TOP OF A FOUR-LEGGED STEEL TOWER WHICH IS APPROXIMATELY 54 FEET HIGH. THE LIGHT WAS USED FOR THE TARGET. THIS STATION IS PLOTTED ON THE SAN DIEGO SECTIONAL AERONAUTICAL CHART.
01/01/1953 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1953 (RAG) THE STATION IS THE ROTATING, RED LIGHT, BEACON LOCATED ON THE SOUTHERN AND HIGHEST SUMMIT OF BOX SPRINGS MOUNTAINS, 5.75 MILES EASTSOUTHEAST OF RIVERSIDE AND 2.8 MILES NORTHWEST OF SUNNYMEAD. THE BEACON IS A STANDARD C.A.A. TYPE MOUNTED ON A STEEL TOWER.
01/01/1960 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1960 (OSR) THE STATION IS THE CENTER OF THE REVOLVING, RED BEACON. IT IS ABOUT 3 MILES NORTH OF MARCH AIRFORCE BASE AND 3 MILES EAST OF U.S. HIGHWAY 395. IT IS SUPPORTED BY FOUR ANGLE IRON LEGS, IS ORANGE IN COLOR AND 50 FEET HIGH. SAME AS LOS ANGELES-PHOENIX AIRWAY BEACON NO. 6, 1950.
01/01/1963 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1963 (BMK) THE STATION IS THE ROTATING BEACON ATOP AND CENTER OF A FOUR-LEGGED, STEEL TOWER THAT IS PAINTED ALUMINUM AND IS APPROXIMATELY 50 FEET HIGH. THE STATION IS LOCATED ON BOX SPRINGS MOUNTAIN, ABOUT 2 MILES EAST OF RIVERSIDE AND 4 MILES NORTHWEST OF SUNNYMEAD. TO REACH THE STATION FROM THE JUNCTION OF PIGEON PASS ROAD AND U.S. HIGHWAY 60 THAT IS ABOUT 3 MILES WEST OF SUNNYMEAD, GO NORTH, WEST, AND SOUTH ON PIGEON PASS ROAD FOR 4.0 MILES TO THE BOX SPRINGS MOUNTAIN ROAD. CONTINUE SOUTH AND EAST ON THE BOX SPRINGS MOUNTAIN ROAD FOR 3.9 MILES TO THE STATION. PROBABLY THE SAME STATION AS LOCATED IN 1950.

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 Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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