Details for Benchmark: OQ0770
N 43° 42.819 W 096° 30.069 (NAD 83)
Coordinates may not be exact. Altitude is UNKNOWN and location is ADJUSTED. (more info)
- In MINNEHAHA county, SD View Original Datasheet
- GARRETSON CONG CH SHORT STEEPL
- Marker Type:
- NGS Benchmark
- setting not listed - see description
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Documented History (by the NGS)
|01/01/1927 by CGS (FIRST OBSERVED)
|01/01/1935 by CGS (GOOD)
|DESCRIBED BY COAST AND GEODETIC SURVEY 1935 (CMC)
THIS MARK IS THE SAME AS IN 1927.
- The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 1998.
- The Laplace correction was computed from DEFLEC99 derived deflections.
- The geoid height was determined by GEOID99.