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Details for Benchmark: DC0898

N 32° 43.283 W 117° 10.317 (NAD 83)

Altitude: 20.24

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

Location:
In SAN DIEGO county, CA View Original Datasheet
Designation:
H 5
Marker Type:
survey disk
Setting:
massive structures with deep foundations
Stability:
Most reliable and expected to hold position/elevation well.

Must Read!

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I need a few more benchmarks under 25 foot altitude for the Jack Rabbit Challenge Trail #8 and these 14 benchmarks will definitely get me there. I found them all and all were in good shape with variations of painting and levels of access. If Dukeroom's logs from 5/30/19 showed a good up close view, I didn't bother uploading mine. However, all logs should include my setting view to help future finders.

[Photos:]
photoH 5 Setting View
Looking northeast towards the south face of the building.

I was geocaching in the area and thought there may be a benchmark on this building. I enjoy locating benchmarks and have never seen a building with this many. I located all 15 benchmarks on this building. It's interesting that there is not an H4, but I don't see any history of one. All were in good condition, with some having paint covering part of the mark.

[Photos:]
photoH5 - Closeup
photoH5 - Area view

During our trip to the US I found out more about benchmarks. I tried to find as many as possible which turned out to be tricky.
This benchmark was in perfect condition.

Tipapignola and I circled the entire building and could spot most of the benchmarks, including this one.

Too easy that you can miss that one.

Finally got back over here (with FlagMan) to find BMs missed when the building was under construction. Disk appears to be in fair condition.

[Photos:]
photoDC0898

In town with a work friend exploring the area while geocaching. This building was covered in benchmarks. She even got into the fun of finding them too!

[Photos:]
photo

Finding benchmarks here is like shooting fish in a barrel - you just can't miss.

[Photos:]
photoDC0898_H5

Just like Hoover Dam, this place is a benchmark wonderland!! No coords needed, all were easy to spot. I grabbed 15 marks in a ten minute walk around. Most in very good shape.

[Photos:]
photoH 5

Came back to log the Marks that I couldn't get before due to construction.

[Photos:]
photoDC0898 H5 1938

In town from Denton, Texas, visiting family. Took the kids to the new park here and went a little crazy discovering and photographing all of the benchmarks surrounding the county building!

[Photos:]
photoDC0898 ~ H5

having fun walking around and looking...

N 32° 43.277 W 117° 10.332

Located on the south wall at the SW corner of the building

[Photos:]
photoDC0898 / H5-18.299 feet / 1938
Another easy find
photoDC0898 / H5 / 1938
A closer view

11th of 15 found on this building.

[Photos:]
photoBM DC0898

Found with my girls, we did a quick run around the building, we missed several... we'll just have to come back.

D!

[Photos:]
photoH 5

On my trip to San Diego I did the first steps in Benchmarking! Found this one easily!

[Photos:]
photoH5

Found as described in good condition.

[Photos:]
photoMark
N 32° 43.278 W 117° 10.329

Found this entire set while benchmarking with sdstickman. If H4 exists, it is underneath ramp east of stairway entrance to the south side of the building. Nice easy starter set for newbies. Alternative designation for set: COUNTYMOUNTIE01 thru COUNTYMOUNTIE16.

[Photos:]
photoDC0898, San Diego, CA

In these days of heightened security concerns, it's a real challenge hunting around a civic building when security guards are outside! But this was an easy find.

Found it.

[Photos:]
photoDC0898.JPG
photoDC0898 Location.JPG

Easy to spot, but you have to get close to read it. Looks like the metal has eroded or been flattened out a little

Attended 1000.

Located mark in good condition.

Documented History (by the NGS)

01/01/1938 by USGS (MONUMENTED)
01/01/1955 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1955 AT SAN DIEGO. AT SAN DIEGO, AT THE CIVIC CENTER, SET VERTICALLY IN THE SOUTH CONCRETE WALL OF THE SOUTHWEST WING OF THE BUILDING, 33.0 FEET WEST OF THE WEST SIDE OF THE SOUTH ENTRANCE, 1.1 FEET EAST OF THE SOUTHWEST CORNER, AND ABOUT 4 FEET HIGHER THAN THE GROUND.
01/01/1970 by CA3260 (GOOD)
RECOVERY NOTE BY CITY OF SAN DIEGO CALIFORNIA 1970 RECOVERED IN GOOD CONDITION.
01/01/1978 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1978 RECOVERED IN GOOD CONDITION.
01/01/1987 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1987 RECOVERED IN GOOD CONDITION.
01/01/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (JBC) RECOVERED IN GOOD CONDITION.
01/01/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (GG) RECOVERED IN GOOD CONDITION.
12/06/1997 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1997 RECOVERED IN GOOD CONDITION.

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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