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Details for Benchmark: HT2259

N 37° 47.883 W 122° 28.117 (NAD 83)

Altitude: 168.73

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

Location:
In SAN FRANCISCO county, CA View Original Datasheet
Designation:
33 USA
Marker Type:
survey disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

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N 37° 47.903 W 122° 28.144

Not at posted coords. Use above.

Found bench mark one foot east off Park Blvd just north of the entrance to Fort Winfield Scott - Kobbe Ave.

Found parking on a side street just south of Kobbe Ave. Believe this street is Hitchcock Street.

[Photos:]
photo042
HT2259, 33 USA.
photo044
East of east curb of Park Blvd. One foot off road.
photo041
Fort Winfield Scott - Kobbe Ave.

My GPSr: N 37 47.902, W 122 28.145

Parking a few hundred feet to the north at the intersection of Park Blvd. & Schofield Rd., as I walked along the east side of Park Blvd. toward the marker, I discovered two other cemetery markers just north of HT2259 (33). The number stamp on one - 34 - was relatively easy to read. The stamp on the other was scraped away, probably by lawnmower blades. I spotted a fourth monument position, however, the mark had been completely stripped away, with just the marker stud remaining. I'm certain many more markers must exist! Will post images. -Batch218-

My GPSr:
33 - N 37 47.902, W 122 28.145
34 - N 37 47.909, W 122 28.146
?? - N 37 47.933, W 122 28.139
xx - N 37 47.952, W 122 28.084

[Photos:]
photo33 Mark
33 Mark
photo33 Mark with GPSr
33 Mark with GPSr
photo33 Mark in situ
33 Mark in situ
photo34 Mark
34 Mark
photo34 Mark with GPSr
34 Mark with GPSr
photo34 Mark in situ
34 Mark in situ
photo?? Mark (Designation unreadable)
?? Mark (Designation unreadable)
photo?? Mark with GPSr
?? Mark with GPSr
photo?? Mark in situ
?? Mark in situ
photoxx Mark monument position with GPSr
xx Mark monument position with GPSr

Interesting Benchmark - National Cemetery designation

[Photos:]
photo33 USA - San Francisco, CA
photo33 USA - San Francisco, CA - Location

Found

This is the first survey mark I've found that was monumented by the U.S. Army Office of the Quartermaster General, and was for a national cemetery. According to this page on the [URL=http://www.nps.gov/prsf/historyculture/history-of-san-francisco-national-cemetery.htm]National Park Service website[/URL], the Army had plans to expand the Presidio cemetery in 1961. I suspect that this mark was part of the survey project for that expansion, which was never done.

[This entry was edited by Wintertime on Sunday, November 22, 2009 at 5:49:55 PM.]

[Photos:]
photoHT2259--Presidio of San Francisco
Monumented by the U.S. Army Office of the Quartermaster General

ok, now that I know what these things look like, I can log them!

N 37° 47.899 W 122° 28.135

I'd given up on this one and was driving away when I finally saw it

Waypoint is from my eTrex Vista.

[Photos:]
photoHT2259 2.JPG

I came upon the marker while searching for a geocache in the area. It is in good condition.

Documented History (by the NGS)

01/01/1961 by USA (MONUMENTED)
01/01/1977 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1977 IN SAN FRANCISCO. IN SAN FRANCISCO, AT THE PRESIDIO, 150 FEET NORTH OF THE ENTRANCE TO FORT WINFIELD SCOTT, 15 FEET EAST OF THE CENTER LINE OF PARK BLVD, AND 1 FOOT EAST OF THE EAST CURB.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (G = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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