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Details for Benchmark: AI7532

N 43° 56.620 W 103° 23.736 (NAD 83)

Altitude: 4665.2

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

Location:
In PENNINGTON county, SD View Original Datasheet
Designation:
RCPC 1
Marker Type:
survey disk
Setting:
set into the top of a round concrete monument
Stability:
Probably hold position/elevation well.

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Spotted benchmark sign/marker. Both are in very good condition.

Found the marker. Parked on Silver Mountain road to get to it.

[Photos:]
photo AI7532 - RCPC1

Really easy to find cause of a sign that stands right by it. Our GPS is off alittle but not much. Was a great day to find it.
highlander2

[Photos:]
photoAI7532 Benchmark

Documented History (by the NGS)

01/01/2000 by GEOMET (MONUMENTED)
DESCRIBED BY GEOMETRICS GPS INCORPORATED 2000 (DAR) THE STATION IS LOCATED 13 MILES (20.9 KM) SOUTHWEST OF RAPID CITY, SOUTH DAKOTA. TO REACH THE STATION FROM THE INTERSECTION OF OMAHA STREET AND MT RUSHMORE ROAD, PROCEED SOUTH ALONG MT RUSHMORE ROAD/HIGHWAY 16 A DISTANCE OF 16 MILES (25.7 KM) TO ITS INTERSECTION WITH SILVER MOUNTAIN ROAD. TURN RIGHT AND PROCEED NORTHEAST BACK ALONG RIGHT-OF-WAY OF DIVIDED HIGHWAY A DISTANCE OF 0.15 MILE (0.24 KM) TO THE STATION RIGHT. THE STATION IS A STANDARD RAPID CITY - PENNINGTON COUNTY ALUMINUM DISK SET IN A POURED IN PLACE CONCRETE MONUMENT SET 0.2 FEET (6.1 CM) ABOVE THE GROUND AND ABOUT 3.0 FEET (0.9 M) ABOVE THE LEVEL OF THE HIGHWAY AND STAMPED RCPC-1, LS6014, 2000. THE STATION IS LOCATED 136 FEET (41.5 M) AZIMUTH 120 DEGREES FROM A RESIDENTIAL AREA SIGN, 138 FEET (42.1 M) AZIMUTH 245 DEGREES FROM A 16 INCH PINE IN A ROCK OUTCROP, 157 FEET (47.9 M) AZIMUTH 273 DEGREES FROM A SILVER MOUNTAIN SIGN, 115 FEET (35.1 M) AZIMUTH 345 DEGREES FROM A DRAIN INLET IN THE MEDIAN OF ROUTE 16, 70 FEET (21.3 M) FROM THE EDGE OF PAVEMENT OF THE SHOULDER OF THE SOUTH BOUND LANES OF ROUTE 16, AND 145 FEET (44.2 M) FROM THE EDGE OF PAVEMENT OF FOREST ROUTE 354 SILVER MOUNTAIN ROAD.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in September 2000.
  • The orthometric height was determined by GPS observations and a high-resolution geoid model using precise GPS observation and processing techniques.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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