Details for Benchmark: RZ1081
N 46° 29.383 W 117° 01.567 (NAD 83)
Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED. (more info)
- In NEZ PERCE county, ID View Original Datasheet
- Z 346
- Marker Type:
- bench mark disk
- set into the top of a round concrete monument
- May hold, but of type commonly subject to surface motion.
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Documented History (by the NGS)
|01/01/1952 by CGS (MONUMENTED)
|DESCRIBED BY COAST AND GEODETIC SURVEY 1952
7.2 MI SW FROM GENESEE. 1.8 MILES SOUTHWEST ALONG THE OLD U. S. HIGHWAY 95 FROM THE NORTHERN PACIFIC RAILWAY STATION AT GENESEE, THENCE 5.4 MILES SOUTHWEST ALONG U. S. HIGHWAY 95, AT A T JUNCTION OF A GRADED ROAD LEADING NORTHWEST, AT A RANCHHOUSE, AT A POINT WHERE A POWER LINE CROSSES THE HIGHWAY, 68 FEET NORTHWEST OF THE CENTER LINE OF THE HIGHWAY, 23 FEET SOUTHWEST OF THE CENTER LINE OF THE ROAD, 4 FEET SOUTHEAST OF POWER LINE POLE NO. 68, 1.6 FEET NORTHEAST OF A FENCE, 2.2 FEET NORTHWEST OF A WITNESS POST, ABOUT LEVEL WITH THE HIGHWAY, AND SET IN THE TOP OF A CONCRETE POST PROJECTING 0.5 FOOT ABOVE THE GROUND.
|01/01/1980 by NGS (GOOD)
|RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980
BENCH MARK RECOVERED ON THIS DATE AS PREVIOUSLY DESCRIBED. NOTE-ADD 0.4 KILOMETER (0.25 MILE) SOUTHWEST OF HIGHWAY MILEPOST 324.
- 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. WARNING-Repeat measurements at this control monument indicate possible vertical movement.
- 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.