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Details for Benchmark: TP1189

N 48° 44.588 W 119° 37.335 (NAD 83)

Altitude: 5174

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

Location:
In OKANOGAN county, WA View Original Datasheet
Designation:
LEMANASKY
Marker Type:
survey disk
Setting:
in rock outcrop
Stability:
Most reliable and expected to hold position/elevation well.

Reference Points

Must Read!

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with Bill H and Stu F

I used to look at this marker every day when I was worked at Aeneas Lookout from 1993-2001.

Documented History (by the NGS)

01/01/1900 by IBC (MONUMENTED)
DESCRIBED BY INTERNATIONAL BOUNDARY COMMISSION 1900 ON THE HIGHEST POINT ON THE RIDGE BETWEEN THE OKANOGAN RIVER AND SINLAHEKIN CREEK, ABOUT 9 MILES NORTHWEST OF TONASKET, WASHINGTON, AND ABOUT 5 MILES SOUTH OF LOOMIS, WASHINGTON. THE PEAK ON WHICH THE STATION IS LOCATED IS LOCALLY KNOWN AS AENEAS MOUNTAIN. THE MOUNTAIN IS BARE EXCEPT FOR SOME TIMBER ON THE NORTH SIDE. STATION MARK--A BRONZE DISK CEMENTED IN SOLID ROCK WITH A 7 - FOOT CAIRN OVER IT. IN 1925 THE US COAST AND GEODETIC SURVEY SET A NEW STATION MARK DESCRIBED AS FOLLOWS--A STANDARD USC AND GS BRONZE - DISK STATION MARK WEDGED IN A DRILL HOLE IN OUTCROPPING BEDROCK, FROM WHICH THE ORIGINAL STATION MARK IN BEARING 230 DEGREES 59 MINUTES, AND 9.275 METERS DISTANT. A STANDARD USC AND GS BRONZE - DISK REFERENCE MARK, WITH THE ARROW POINTING TOWARD THE STATION, IS WEDGED IN A DRILL HOLE IN OUTCROPPING BEDROCK 19.420 METERS FROM THE STATION MARK IN BEARING 206 DEGREES 19 MINUTES 18 SECONDS. ANOTHER LIKE REFERENCE MARK SET IN THE SAME MANNER IS 10.909 METERS FROM THE STATION IN BEARING 285 DEGREES 15 MINUTES 43 SECONDS.
01/01/1925 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1925 RECOVERED.
01/01/1986 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1986 (DAW) THE STATION WAS RECOVERED AT THIS DATE. A COMLETE DESCRIPTION FOLLOWS. THE STATION IS LOCATED ABOUT 38.6 KM (24 MI) NORTH OF OMAK, 29 KM (18 MI) SOUTH OF THE CANADIAN BORDER, 14.5 KM (9 MI) NORTHWEST OF TONASKET AND ON THE SUMMIT OF A PEAK LOCALLY KNOWN AS AENEAS MOUNTAIN. THE PROPERTY IS CONTROLLED BY THE WASHINGTON STATE DEPARTMENT OF NATURAL RESOURCES. TO REACH THE STATION FROM THE POST OFFICE IN TONASKET GO NORTH FOR 0.16 KM (0.1 MI) TO THE INTERSECTION OF FOURTH STREET. TURN LEFT AND GO WEST ON FORUTH STREET, CROSSING THE OKANOGAN RIVER FOR 0.48 KM (0.3 MI) TO A T-INTERSECTION. TURN LEFT AND GO SOUTH ON THE SURFACED ROAD FOR 0.80 KM (0.5 MI) TO A FORK. TAKE THE RIGHT FORK AS PER SIGN, AENEAS LOOKOUT, FOR 4.75 KM (2.9 MI) TO A SIDE ROAD RIGHT. TURN RIGHT AND GO WEST AND NORTH ON THE GRAVELED ROAD FOR 2.9 KM (1.8 MI) TO A SIDE ROAD LEFT. TURN LEFT AND GO WEST AND NORTH ON THE GRAVELED ROAD FOR 11.99 KM (7.45 MI) TO A LOCKED GATE. THE KEY CAN BE OBTAINED FROM THE WASHINGTON STATE DEPARTMENT OF NATURAL RESOURCES OFFICE IN TONASKET. PASS THROUGH THE GATE AND CONTINUE UPHILL ON THE MAIN ROAD FOR 2.01 KM (1.25 MI) TO A LOCKED GATE. PASS THROUGH THE GATE AND CONTINUE UPHILL ON THE MAIN ROAD FOR 2.74 KM (1.7 MI) TO THE SUMMIT, THE LOOKOUT TOWER AND THE STATION. THE STATION MARK IS A STANDARD USGS BENCH MARK DISK THAT IS UNSTAMPED AND SET IN A DRILLHOLE IN A BOULDER THAT IS 0.5 M (1.5 (1.5 FT) IN THE LARGEST DIMENSION. IT IS 1.2 M (4 FT) SOUTHWEST OF THE NORTHEAST LEG OF THE LOOKOUT TOWER AND 0.9 M (3 FT) SOUTH OF THE NORTH SIDE OF THE LOOKOUT TOWER. DESCRIBED BY DA WEGENAST.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in December 1991.
  • The orthometric height was scaled from a topographic map.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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