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Details for Benchmark: BM0634

N 30° 15.750 W 097° 44.683 (NAD 83)

Altitude: 474

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

Location:
In TRAVIS county, TX View Original Datasheet
Designation:
R 201
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Benchmark in Texas.

Our 15th benchmark!

[Photos:]
photo

This one tooka little looking. Glad there were better coords.

This one was not difficult to spot using previous posted coordinates. Need to step beyond the guardrail, but still easy to get to.

[Photos:]
photoBM0634 - Disk
photoBM0634 - Setting

Found this on my day walk at hot Austin.

[Photos:]
photoR201

Thanks to a photo posted for "AHG 13: Buford Tower", I looked around and found this benchmark. I'm always happy to find another benchmark! r1r

[Photos:]
photobenchmark R201

thanks

A few feet west of the NW corner of the Congress Street Bridge on top of the retaining wall.

[Photos:]
photoBM0634 / R 201 / 1933
The marker at the NW corner of the Congress Bridge
photoBM0634 / R 201 / 1933
The disk is set on top of the concrete retaining wall about 10 feet west of this plaque.
N 30° 15.764 W 097° 44.697

Recovered as described in good condition.

[Photos:]
photoBM0634 Mark
photoBM0634 Location
Mark is at far end of railing in this frame.

Found this one during a break from meetings.

[Photos:]
photoBM0634

Well, this was certainly convenient. This benchmark was located maybe 200 feet from the hotel I'm staying it. First benchmark found in Texas. It's hard not to write "thanks for the cache!" at the end of these logs.

[Photos:]
photoR 201 benchmark

Wasn't here from Pennsylvania to look for benchmarks....I came to look for the bats! But I'll take the disc "find" anyway.

Found as described and in good condition.

[Photos:]
photoBM0634
photoBM0634 setting

Right where it is described.

BM is in good condition at the Northwest abutment of the Congress Ave. bridge. Easy to find, because someone has outlined it in orange spray paint.

Not sure about the coords, but with the help of the photos from Team GeoDillo, I was able to go right to it. Nice BM with a nice view of the sunset.

N 30° 15.764 W 097° 44.697

This was the third of five I found today. The 1973 description was adequate for finding this one near the Congress Street bridge over the Colorado river. The condition is very good with almost no damage.

Scott of Team GeoDillo

[Photos:]
photoBM0634 with GPS and Scott
photoBM0634 View across the river
photoBM0634 View of the Congress bridge
photoView of the Texas Capitol down Congress Avenue (near BM0634)

Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
01/01/1973 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1973 IN AUSTIN. AT THE NORTH END OF THE CONGRESS AVENUE BRIDGE OVER THE COLORADO RIVER, AT AUSTIN, 60.6 FEET WEST OF THE CENTER LINE OF CONGRESS AVE, SET IN TOP OF THE SOUTHWEST END OF A CONCRETE WALL, 3.3 FEET ABOVE THE GROUND. NOTE-- THE RETAINING WALL IS CRACKED AND OLD BUT THE DISK WAS STILL SOLID.
01/01/1980 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980 RECOVERED IN GOOD CONDITION.
01/01/1983 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1983 RECOVERED IN GOOD CONDITION.
01/01/1990 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1990 (GGB) RECOVERED IN GOOD CONDITION.
07/30/1998 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1998 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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