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Details for Benchmark: HT1333

N 37° 26.800 W 122° 10.200 (NAD 83)

Altitude: 74.8

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

Location:
In SAN MATEO county, CA View Original Datasheet
Designation:
H 7
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Uhh. No trains.

[Photos:]
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I would NOT recommend logging this benchmark for families with children. It's just too dangerous here with the Caltrain zooming by every few minutes. But I couldn't resist logging a 105-yr old benchmark. Still in reasonably good shape too.

[Photos:]
photo0101151542
photo0101151542a

Found after GCA001

[Photos:]
photo047
HT1333, H7
photo048
MP 29.69
photo038
Bridge 1902

Braved crossing the RR bridge on foot in between trains in waning daylight to find this one. My second benchmark of the night!

[Photos:]
photoHT1333

Found as described with a cover of poison oak.

[Photos:]
photoHT1333

Pas på der kommer tog.

[Photos:]
photoBeac.
photoL 1
photoL 2
photoL 3

I don't recommend searching for this benchmark for most people because the train line here is still very active and there are no trespassing signs in the area. I had a hard time resisting a hundred year old benchmark that I'd been so close to so many times, so when I was 100% sure it was totally safe I got to the disk, took my pictures and left. Disk was marked H7 1910 as described, and has picked up some painted graffiti in the last couple of years, but otherwise still looks solid.

[Photos:]
photoHT1333
photoWider shot showing location

Nicked up a bit but still there. Enjoyed the living landmark nearby.

[Photos:]
photoH 7, San Mateo County, CA
photoH 7, Location, San Mateo County, CA

Made it across tracks to benchmark without making the evening news.

[Photos:]
photoHT1333.JPG
photoHT1333 Location.JPG

Still there...

Right next to the 102 year old bridge that is still used by the new baby bullet train. Bullet train went by a minute or two after my visit.

N 37° 26.839 W 122° 10.233

North creek bank, west end of north abutment, by steel trestle anchor, set in concrete. This is the oldest benchmark disk that I have come across.

[Photos:]
photo1910, designation H7
photoBM position on trestle
photo1902 trestle
photoTrestle in action: CalTrain
Palo Alto Tree is just to the right

I don't know whether the railway upgrade has happened yet, but the old bridge and the benchmark are still there. Is there a way to get to the benchmark from behind the hotel so as not to have to cross the tracks?

I'm attaching a photo because it's interesting that the date is more obvious now than when Payakoi photographed it. I don't know whether that's from different lighting, or whether someone really did paint in the numbers.

[Photos:]
photoH7
H7 benchmark near San Francisquito Creek.
N 37° 26.840 W 122° 10.229

Wow, this is the most worn benchmark I've seen yet.

[Photos:]
photoHT1333
photoEnd of the bridge
The benchmark is located at the lower right corner of the bridge.

In good shape for its age, but with the coming railroad upgrade, i'm worried about it, though.

Documented History (by the NGS)

01/01/1910 by CGS (MONUMENTED)
01/01/1954 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1954 IN MENLO PARK. IN MENLO PARK, 0.4 MILE NORTHWEST ALONG THE SOUTHERN PACIFIC COMPANY RAILROAD FROM THE PALO ALTO STATION, AT STEEL BRIDGE 29.69 OVER SAN FRANCISQUITO CREEK, IN THE TOP OF THE SOUTHWEST END OF THE NORTHWEST ABUTMENT, 8.9 FEET SOUTHWEST OF THE SOUTHWEST RAIL OF THE SOUTHWEST TRACK, AND ABOUT 1 FOOT LOWER THAN THE TRACK.
01/01/1967 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1967 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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