Details for Benchmark: HT1646

N 37° 18.183 W 122° 01.900 (NAD 83)

Altitude: 282

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

Location:
In SANTA CLARA county, CA View Original Datasheet
Designation:
RV 2748 RESET 1962
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Navigation

Found it 07/11/2018 Scooter2x2 found HT1646   Visit Log

Found while doing some night BM hunting.
Found it 06/09/2017 starpop found HT1646   Visit Log

Found at gas station and curb marked.

[Photos:]
photoClose up RV2748
photoLocation on side of gas station
Found it 08/02/2015 atc found HT1646   Visit Log

Visited the benchmark today.

[Photos:]
photoBenchmark
Found it 10/18/2014 lmt000 found HT1646   Visit Log

Found where described

[Photos:]
photomark
photoeye level
photofor reference
Found it 02/12/2014 oaknest found HT1646   Visit Log

Found with CarlottaP
Found it 02/11/2014 CarlottaP found HT1646   Visit Log

Oaknest and I found this benchmark easily.

[Photos:]
photoBenchmark on the curb
Found it 04/17/2012 fishnguy&10sgrl found HT1646   Visit Log

Very close to home.
Found it 11/23/2011 Robiswalking found HT1646   Visit Log

I think this is my first benchmark. Sweet!
Found it 11/26/2010 us_marine_ssgt found HT1646   Visit Log

out burning calories after Thanksgiving!
Found it 11/22/2006 British Invasion found HT1646   Visit Log

i walk past this benchmark every few days so i guess i need to log it, it's in good shape.
Found it 07/12/2006 50sumtin found HT1646   Visit Log
N 37° 18.206 W 122° 01.921

Found it in good shape. 50sumtin
Found it 04/09/2006 Falstaff found HT1646   Visit Log

Found it as described at the US Gas gasoline station near the corner of S. De Anza Blvd and Bark Lane.

[Photos:]
photoRV2748 - Vicinity - Cupertino, CA - HT1646
The benchmark is on top of the retaining wall.
photoRV2748 - Disk - Cupertino, CA - HT1646
Found it 03/22/2006 Nazgul found HT1646   Visit Log

Found as described, not sure how the USPS guys could have missed it in their 1996 recovery note...

[Photos:]
photoHT1646
photoWider shot
Found it 01/21/2006 Thefogheads found HT1646   Visit Log

We're out for an afternoon of Benchmarking and this was our fourth of the day. Nice and easy find!

[Photos:]
photoRV 2748
Found it 09/07/2005 budd-rdc found HT1646   Visit Log
N 37° 18.207 W 122° 01.921

This one was very easy to spot using the NGS description. There's a white wooden pole right next to the benchmark. The gas station is now called U.S. Gas.

Coordinates above were checked with two GPSr's. Longitude is likely to be very accurate.

The benchmark is in good condition.

[Photos:]
photoArea Around HT1646
Camera is pointing north. The BM is barely visible, near the base of the wooden pole.
photoRV 2748 and GPSr's
Camera is pointing down, and east.
photoRV 2748 RESET, Close Up
Camera is pointing north, to get the natural lighting to make the stampings easier to read.
Found it 05/12/2004 RockAndMjb found HT1646   Visit Log

The US Power Squadron did not find this mark in 1996, but it definitely still exists. The description is accurate with the following changes.
1) The Douglas Service Station is now an independent mini-mart self-service gasoline station.
2) Sunnyvale-Saratoga Rd is now called S De Anza Blvd for this section of the road. This road is a main artery for Silicon Valley and the road changes names multiple times.

Documented History (by the NGS)

01/01/1962 by CGS (MONUMENTED)
01/01/1967 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1967 1.4 MI S FROM CUPERTINO. 1.35 MILES SOUTH ALONG SARATOGA-SUNNYVALE ROAD FROM THE INTERSECTION OF STEVENS CREEK BOULEVARD AT CUPERTINO, AT THE JUNCTION OF BARK LANE, AT THE NORTH EDGE OF A DOUGLAS SERVICE STATION, IN THE TOP OF A CONCRETE RETAINING WALL WHICH PROJECTS ABOUT 1 FOOT ABOVE THE ASPHALT SURFACE OF THE STATION, 150 FEET NORTH OF THE CENTER LINE OF THE LANE, 67 FEET EAST OF THE CENTER LINE OF THE ROAD, 18 FEET EAST OF A POWER POLE WITH A GUY WIRE, 7.0 FEET EAST OF THE WEST END OF THE WALL, AND ABOUT 1 1/2 FEET HIGHER THAN THE ROAD.
06/02/1991 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1991 (GEP) RECOVERED IN GOOD CONDITION.
03/16/1996 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1996 MARK NOT FOUND.

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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