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Details for Benchmark: AA5369

N 39° 36.054 W 106° 05.385 (NAD 83)

Altitude: 9183

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

Location:
In SUMMIT county, CO View Original Datasheet
Designation:
OVERLOOK
Marker Type:
survey disk
Setting:
surrounded by a mass of concrete
Stability:
Probably hold position/elevation well.

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Found this I-70 survey marker near one of our caches

Found this one with the chef

Nice and safe to get this one in the rest area. Easy find.

[Photos:]
photoApril 2009 026

Drove through sunshine,sleet then a blizzard.Got there and dig through about a foot of snow,all for the "O".BM in good shape.

[Photos:]
photoAA5369 OVERLOOK

Just got my GPS and wanted to make an easy find and calibrate the altimeter. Drive to this benchmark and enjoy the views of Lake Dillon and surrounding mountains.

[Photos:]
photoOverlook benchmark above Lake Dillon
N 39° 36.054 W 106° 05.385

OK, so it is an easy find, but a nice view and stop nonetheless.

An easy find. It can be seen from the last parking spot on the SW corner of the pavement. It's in good shape and has a mighty fine view of the Continental Divide.
Photos taken on 8/23/2003

[last edit: 8/24/2003 11:17:37 AM PST]

[Photos:]
photoOverlook
photoView East
View East of the Continental Divide and Loveland Pass
photoView West
View West- The highest mountain is Peak 1. The cairn on top is a benchmark.
photoView South
View of Swan Mountain (Benchmark KL0603). I-70 and Lake Dillon are in the foreground

Documented History (by the NGS)

01/01/1992 by CODOT (MONUMENTED)
DESCRIBED BY COLORADO DEPARTMENT OF TRANSPORTATION 1992 (JPC) THE STATION IS LOCATED APPROX. 2.3 MI (3.7 KM) WEST SOUTHWEST OF SILVERTHORNE IN THE SOUTH CENTER OF SECTION 23, T 5 S, R 78 W, AT INTERSTATE 70 (I-70) MILEPOST 203.0. OWNERSHIP--COLORADO DEPARTMENT OF TRANSPORTATION (CDOT). TO REACH THE STATION FROM THE EAST JUNCTION OF STATE HIGHWAY 9 AND I-70 (EXIT 205), GO WEST ON I-70 FOR 2.2 MI (3.5 KM) TO A "SCENIC AREA" PULLOUT, PROCEED 0.1 MI (0.2 KM) UP THE PULLOUT TO THE FAR WEST END OF THE SCENIC AREA, THE STATION IS LOCATED ON THE LEFT 35 M (114.8 FT) PAST THE LAST PARKING STALL. THE STATION IS A 3-1/4" COLORADO DEPARTMENT OF HIGHWAY (CDOH) ALUMINUM CONTROL MONUMENT CAP, SET ON A 3 FT (0.9 M) FINNED ALUMINUM SECURITY ROD ON A 3 FT (0.9 M) SMOOTH ALUMINUM ROD, SURROUNDED BY A 1 M (3.3 FT) DIAMETER MASS OF CONCRETE SET FLUSH WITH THE GROUND. IT IS 24.3 M (79.7 FT) NORTHWEST OF THE NORTH EDGE OF ASPHALT OF THE WEST BOUND LANES ON I-70, 6.7 M (22.0 FT) SOUTHEAST OF THE SOUTH EDGE OF ASPHALT OF THE SCENIC AREA ROAD, 33.9 M (111.2 FT) SOUTHWEST OF A LIGHT POST, 10.3 M (33.8 FT) NORTHEAST OF AN "EXIT" SIGN, AND 0.96 M (3.15 FT) WEST OF A CDOT FIBERGLASS WITNESS POST.
11/30/1994 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1994 (RSC) RECOVERED AS DESCRIBED.
08/17/1998 by CODOT (GOOD)
RECOVERY NOTE BY COLORADO DEPARTMENT OF TRANSPORTATION 1998 (KAW) RECOVERED AS DESCRIBED.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in June 1995.
  • The orthometric height was determined by GPS observations and a high-resolution geoid model.
  • The X, Y, and Z were computed from the position and the ellipsoidal ht.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.
  • The geoid height was determined by GEOID99.

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