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Details for Benchmark: HT2519

N 37° 48.037 W 122° 10.545 (NAD 83)

Altitude: 1045

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

Location:
In ALAMEDA county, CA View Original Datasheet
Designation:
SKYLINE
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:

Reference Points

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interesting? found disks marked SKYLINE and SKYLINE RM 2 up in Roberts park at the end of Vista View trail but totally dont match the descriptions here???

Documented History (by the NGS)

01/01/1947 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1947 (SPH) THE STATION IS LOCATED ON THE SOUTH EDGE OF A BARE HILL, 0.15 MILE SOUTHWEST OF THE JUNCTION OF REDWOOD ROAD AND SKYLINE BOULEVARD, 250 FEET SOUTH OF SKYLINE BOULEVARD, 27 FEET SOUTHEAST OF THE CENTERLINE OF A GRAVEL ROAD, AND 4 FEET SOUTH OF A WITNESS POST. THE DISK IS A STANDARD STATION DISK STAMPED SKYLINE 1947 AND IS SET IN A CONCRETE MARK THAT PROJECTS 3 INCHES. REFERENCE MARK NO. 1 IS 55.870 FEET SOUTHEAST OF THE STATION. THE DISK IS A STANDARD REFERENCE DISK STAMPED SKYLINE NO 1 1947 AND IS SET IN A CONCRETE MARK THAT PROJECTS 1 INCH. REFERENCE MARK NO. 2 IS 40.435 FEET WEST OF THE STATION. THE DISK IS A STANDARD REFERENCE DISK STAMPED SKYLINE NO 2 1947 AND IS SET IN A CONCRETE MARK THAT PROJECTS 1 INCH. THE AZIMUTH MARK IS APPROXIMATELY 0.5 MILE EAST OF THE STATION, ON TOP OF A SMALL HILL 75 FEET SOUTH OF REDWOOD ROAD, AND IS 5 FEET SOUTHWEST OF A WITNESS POST. THE DISK IS A STANDARD AZIMUTH DISK STAMPED SKYLINE 1947 AND S SET IN A CONCRETE MARK THAT PROJECTS 2 INCHES. TO REACH THE STATION FROM THE INTERSECTION OF MAC ARTHUR BOULEVARD WITH 39TH AVENUE IN EAST OAKLAND, GO NORTH ON 39TH AVENUE FOR 0.8 MILE TO REDWOOD ROAD, TURN RIGHT AND GO EAST ON REDWOOD ROAD FOR 0.1 MILE TO A POINT WHERE REDWOOD ROAD SWINGS NORTHEAST ACROSS MOUNTAIN BOULEVARD, GO NORTHEASTERLY ON REDWOOD ROAD UP STEEP HILL FOR 0.85 MILE TO A POINT WHERE ROAD MAKES SHARP TURN TO THE NORTHEAST, THE AZMUTH MARK IS LOCATED ATOP THE SMALL HILL TO THE LEFT HERE, CONTINUE UP REDWOOD ROAD FOR 0.25 MILE TO A JUNCTION WITH SKYLINE BOULEVARD, GO WEST ON DIVIDED HIGHWAY (SKYLINE BOULEVARD) FOR 0.35 MILE, THENCE CUT BACK IN EASTBOUND LANE FOR 0.2 MILE TO A GRAVEL ROAD RIGHT, GO RIGHT ON GRAVEL ROAD FOR 0.05 MILE TO THE STATION ON THE LEFT. HEIGHT OF LIGHT ABOVE STATION MARK 1 METER.
01/01/1955 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1955 (WMG) THIS STATION WAS TAKEN OUT. THE STATION MARK AND TWO REFERENCE MARKS WERE REMOVED. THE AZIMUTH MARK WAS FOUND IN GOOD CONDITION AS DESCRIBED. SKYLINE 2 1955 WAS ESTABLISHED TO REPLACE THIS STATION.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in March 1994. 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 Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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