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Details for Benchmark: AD2430

N 26° 00.717 W 080° 07.433 (NAD 83)

Altitude: 1.68

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

Location:
In BROWARD county, FL View Original Datasheet
Designation:
B 311
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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The large concrete slab in which this mark was installed makes it extremely easy to find.

[Photos:]
photoB 311
N 26° 00.734 W 080° 07.380

Easy find on Hollywood Blvd and N 9th Ave.

[Photos:]
photoAD2430-GPS-20141005
photoAD2430-B_311-2-20141005
photoAD2430-B_311-3W-20141005

Accidentally found. In great shape.

[Photos:]
photoFacing East
photo4x4 square just off sidewalk
photoUp close
N 26° 00.732 W 080° 07.379

YAY! Another fairly easy find!

[Photos:]
photoClose up
photoWith GPS
photo4 X 4 concrete block
photoView west
photoHouse north of mark

Documented History (by the NGS)

1/1/1970 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1970 AT HOLLYWOOD. AT HOLLYWOOD, ABOUT 1.3 MILES EAST ALONG STATE HIGHWAY A 1 A FROM THE JUNCTION OF U.S. HIGHWAY 1, ABOUT 0.4 MILE WEST OF THE JUNCTION OF STATE HIGHWAY 820 AND STATE HIGHWAY A 1 A AT HOLLYWOOD BEACH, SET ON TOP AND IN THE CENTER OF A 4-BY 4-FOOT CONCRETE BLOCK, 2.8 FEET NORTH OF THE NORTH CURB OF STATE HIGHWAY 820, 33 FEET EAST OF THE APPROXIMATE CENTER LINE OF N 9TH AVENUE, 7 FEET EAST OF A LIGHT POLE, ABOUT LEVEL WITH THE HIGHWAY AND PROJECTS 1 FOOT ABOVE THE LEVEL OF THE GROUND.
1/1/1973 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1973 RECOVERED IN GOOD CONDITION.
1/1/1990 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1990 (JHH) RECOVERED IN GOOD CONDITION.
6/18/1991 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1991 (JHH) RECOVERED IN GOOD CONDITION.
4/13/1994 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1994 RECOVERED IN GOOD CONDITION.
1/7/1995 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1995 RECOVERED IN GOOD CONDITION.
2/21/1998 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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