Details for Benchmark: RZ0250
N 46° 18.350 W 116° 36.700 (NAD 83)
Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED. (more info)
- In LEWIS county, ID View Original Datasheet
- G 24
- Marker Type:
- bench mark disk
- light structures
- Mark of questionable or unknown stability.
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Documented History (by the NGS)
|01/01/1933 by CGS (MONUMENTED)
|01/01/1965 by NGS (GOOD)
|DESCRIBED BY NATIONAL GEODETIC SURVEY 1965
5.1 MI N FROM WINCHESTER. 5.1 MILES NORTH ALONG A MACADAM ROAD, (FORMERLY U.S. HIGHWAY 95), FROM THE WINCHESTER POST OFFICE AT A FIELD APPROACH ON EITHER SIDE OF THE MACADAM ROAD, 96 FEET SOUTHEAST OF A TELEPHONE POLE, 76 FEET NORTH-NORTHEAST AND ACROSS THE MACADAM ROAD FROM A POWER POLE, 31 FEET NORTHEAST OF THE CENTER OF THE MACADAM ROAD, 28 FEET NORTHWEST OF THE CENTER OF A FIELD APPROACH AND 0.5 FOOT NORTHWEST OF A METAL WITNESS POST SET IN THE TOP OF A SQUARE CONCRETE MONUMENT THAT PROJECTS 5 INCHES.
|01/01/1982 by NGS (GOOD)
|RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1982
RECOVERED IN GOOD CONDITION. NOT LEVELED TO IN 1983. THE MARK IS 0.2 METERS N FROM A WITNESS POST. THE MARK IS ABOVE LEVEL WITH THE HIGHWAY.
|01/01/1982 by USGS (GOOD)
|RECOVERY NOTE BY US GEOLOGICAL SURVEY 1982
5.4 MILES ALONG OLD U.S. HIGHWAY 95 FROM THE CONCRETE BLOCK GARAGE AT WINCHESTER LEWIS CO. , 345 FT. NORTH OF AN 18 INCH CULVERT, 300 FT. SOUTH OF A HWY. CURVE, 32 FT. EAST OF THE CENTERLINE OF THE ROAD. 1.5 FT. WEST OF A TELEPHONE LINE, AND LEVEL WITH THE ROAD SURFACE. AT THE NORTH EDGE OF AN ENTRANCE INTO A CULTIVATED FIELD. A STANDARD DISK, STAMPED ''G 24 1933'' AND SET IN THE TOP OF A CONCRETE POST LEVEL WITH GROUND SURFACE. NOTE: FARM EQUIPMENT HAS BEEN RUNNING OVER THE MARK BUT AS YET, HAS NOT DISTURBED IT.
- 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.