STATION DESCRIPTION
DESCRIBED BY NATIONAL GEODETIC SURVEY 1981
DESIGNATION - P 510
PID - SW1022
STATE/COUNTY- WA/GRANT
COUNTRY - US
USGS QUAD - GRAND COULEE DAM (1989)
MARKER: DV = VERTICAL CONTROL DISK
SETTING: 66 = SET IN ROCK OUTCROP
STAMPING: P 510 1981
MARK LOGO: NGS
DESCRIBED BY NATIONAL GEODETIC SURVEY 1981
IN GRAND COULEE.
AT THE WEST END OF GRAND COULEE DAM, IN TOP OF THE EAST EDGE OF A 4 BY
5 FOOT FLAT TOP SHELF IN A GRANITE CUT, 37.7 METERS (123.5 FT) SOUTH
OF THE EXTENDED CENTERLINE OF THE ROAD LEADING OVER THE DAM, 5.8
METERS (19 FT) WEST OF THE WEST CURB OF THE HIGHWAY, 31.2 METERS (102
FT) SOUTH OF THE SOUTH CONCRETE RETAINING WALL OF A CRANE BAY ON THE
WEST AXIS OF THE DAM, 10 METERS (33 FT) NORTH OF THE SOUTH EDGE OF A
CONCRETE APRON AT THE BASE OF THE CUT, 0.6 METER (2 FT) WEST OF THE
WEST EDGE OF THE ROCK SHELF.
THE MARK IS 0.3 METERS E FROM A WITNESS POST.
From the NGS Datasheet