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Details for Benchmark: AW0586

N 29° 18.683 W 094° 45.983 (NAD 83)

Altitude: 13.93

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

Location:
In GALVESTON county, TX View Original Datasheet
Designation:
H 305
Marker Type:
bench mark disk
Setting:
massive retaining walls
Stability:
Probably hold position/elevation well.

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Saw this benchmark while caching in the area.

[Photos:]
photoAW0586

Finding benchmarks along the seawall.

[Photos:]
photoaw0586
N 29° 18.691 W 094° 46.005

Coordinates and pictures accompany

[Photos:]
photoThe Mark
photoWide View
photoFrom Above

Spotted while driving along Seawall Blvd. Easy peasy!

[Photos:]
photoAW0586

Found it on a fun day of benchmark hunting along the length of Galveston's historic seawall.

[Photos:]
photoAW0586 H 305 Galveston TX

Found this on a very windy and overcast day on Galveston Island.

[Photos:]
photoAW0586
photoAW0586 location
photoCorps of Engineers mark just East of AW0586

Found in good shape.

[Photos:]
photoH305

benchmarking down the seawall

[Photos:]
photoAW0586 H305

A nice day for benchmarking along the seawall. No problem finding this one.

[Photos:]
photoAW0586 H305

A nice day for benchmarking along the seawall while I am in Galveston for the weekend. No problem finding this benchmark

Good Condition.

[Photos:]
photoAW0586 small.JPG
photoLooking Southwest

Documented History (by the NGS)

1/1/1935 by CGS (MONUMENTED)
1/1/1964 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1964 1.95 MI NE FROM GALVESTON. ABOUT 1.95 MILES NORTHEAST ALONG SEA WALL BOULEVARD FROM THE MOODY CENTER AT GALVESTON, OR ABOUT 1.4 MILES NORTHEAST ALONG MARKET STREET FROM THE GULF, COLORADO, AND SANTA FE RAILROAD STATION AT GALVESTON THENCE 0.3 MILE SOUTHWEST ALONG STATE HIGHWAY 87, ABOUT 0.25 MILE NORTHEAST OF THE INTERSECTION OF STATE HIGHWAY 87, 51 FEET SOUTHEAST OF THE CENTER LINE OF THE BOULEVARD, 18 FEET NORTHEAST OF A POWER LINE CROSSING OVER THE BOULEVARD, SET IN THE CENTER OF THE TOP OF THE CONCRETE SEA WALL, AND ABOUT LEVEL WITH THE BOULEVARD.
1/1/1978 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1978 RECOVERED IN GOOD CONDITION.
1/1/1984 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1984 RECOVERED IN GOOD CONDITION.
1/1/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (MP) RECOVERED IN GOOD CONDITION.
1/1/1987 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1987 RECOVERED IN GOOD CONDITION WITH THE FOLLOWING EXCEPTION. ADD--3.1 KM (1.95 MI) NORTHEAST OF MOODY CENTER.
1/1/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (JLD) RECOVERED IN GOOD CONDITION.
1/1/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (MQK) RECOVERED IN GOOD CONDITION.
1/1/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (NGB) RECOVERED IN GOOD CONDITION.
1/1/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (CWT) RECOVERED IN GOOD CONDITION.
1/1/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (DM) RECOVERED IN GOOD CONDITION.
1/1/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (BMS) RECOVERED IN GOOD CONDITION.
1/1/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (LGS) RECOVERED IN GOOD CONDITION.
1/1/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (GWS) RECOVERED IN GOOD CONDITION.
1/1/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (JLS) RECOVERED IN GOOD CONDITION.
1/1/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (CTA) RECOVERED IN GOOD CONDITION.
1/1/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (HCM) RECOVERED IN GOOD CONDITION.
1/1/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (JDA) RECOVERED IN GOOD CONDITION.
1/1/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (GCM) RECOVERED IN GOOD CONDITION.
1/1/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (LJC) RECOVERED IN GOOD CONDITION.
1/1/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (WJP) RECOVERED IN GOOD CONDITION.
1/1/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (BJG) RECOVERED IN GOOD CONDITION.
1/1/1990 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1990 (PSM) RECOVERED IN GOOD CONDITION.
9/17/1994 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1994 RECOVERED IN GOOD CONDITION.
7/22/1995 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1995 RECOVERED IN GOOD CONDITION.
10/6/1995 by CHANCE (GOOD)
RECOVERY NOTE BY JE CHANCE AND ASSOCIATES 1995 (KAL) RECOVERED AS DESCRIBED. ADDITIONAL TIES FOLLOW. ACROSS THE BOULEVARD FROM SEAWALL EAST APARTMENTS, 0.2 M (0.7 FT) NORTHWEST OF THE SOUTEAST EDGE OF THE SEAWALL, 4.4 M (14.4 FT) SOUTHEAST OF THE SOUTHEAST EDGE OF SEAWALL BOULEVARD, 25.9 M (85.0 FT) SOUTHWEST OF A --CAUTION DROP OFF-- SIGN, 34.7 M (113.8 FT) NORTEAST OF A SIGNPOST WITH NO SIGN, 65.4 M (214.6 FT) SOUTHWEST OF CENTER OF AN UNNAMED ROAD LEADING TO THE SOUTHEAST.
12/5/1996 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1996 (GAS) 0.9 KM (0.55 MI) NORTHEASTERLY ALONG SEAWALL BOULEVARD FROM THE JUNCTION OF BROADWAY AVENUE IN GALVESTON, IN A CONCRETE SEAWALL ALONG THE SOUTH SIDE OF THE BOULEVARD, 65.4 M (214.6 FT) SOUTHWEST OF THE CENTER OF EAST BEACH DRIVE, 11.8 M (38.7 FT) SOUTHEAST OF THE BOULEVARD CENTERLINE, 6.9 M (22.6 FT) NORTH OF A UTILITY LINE CROSSING THE BOULEVARD, 0.3 M (1.0 FT) NORTHWEST OF THE SOUTHEAST EDGE OF THE SEAWALL, 0.3 M (1.0 FT) BELOW THE LEVEL OF THE BOULEVARD, AND ACROSS THE BOULEVARD FROM THE SEAWALL EAST APARTMENTS.

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 March 1997.
  • 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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