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Details for Benchmark: RC2193

N 45° 54.923 W 121° 20.485 (NAD 83)

Altitude: 3005

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

Location:
In KLICKITAT county, WA View Original Datasheet
Designation:
DIAMOND GAP
Marker Type:
survey disk
Setting:
setting not listed - see description
Stability:
Mark of questionable or unknown stability.

Reference Points

Must Read!

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We parked at a gate to the S.E. and walked the road before deciding to just find our own way to the top, it was very steep and required alot of bushwacking, but we made it.

[Photos:]
photoWhere lookout once stood
Day Wireless is constructing a new tower
photoDiamond Gap
photoDiamond Gap ref#1
photoDiamond Gap ref#2

Documented History (by the NGS)

01/01/1946 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1946 (EEB) LOCATED 100 FEET NORTH AND 6 FEET LOWER THAN THE HIGHEST PART OF A HEAVILY TIMBERED RIDGE 7 MILES SOUTH SOUTHWEST OF GLENWOOD. IT IS 79 FEET NORTHEAST OF THE DIAMOND GAP LOOKOUT BUNK HOUSE. IT IS A STANDARD DISK BRAZED TO A 3 INCH IRON PIPE PROJECTING 6 INCHES. IT IS STAMPED DIAMOND GAP 1946. REFERENCE MARK NO. 1 IS STAMPED DIAMOND GAP NO 1 1946 AND PROJECTS 5 INCHES. REFERENCE MARK NO. 2 IS 14.5 FEET NORTH OF THE NORTHWEST CORNER OF THE BUNK HOUSE AND 5 FEET HIGHER THAN THE STATION. IT IS STAMPED DIAMOND GAP NO 2 1946 AND PROJECTS 6 INCHES. TO REACH THE STATION FROM THE POST OFFICE IN GLENWOOD GO SOUTH TOWARD WHITE SALMON FOR 4.9 MILES TO A FORK, KEEP RIGHT FORK AND CONTINUE MAIN TRAVELED ROAD 5.6 MILES TO A SIGN LAUREL LOOKOUT TOWER ON THE LEFT. TURN LEFT 2.1 MILES TO THE DIAMOND GAP LOOKOUT AT THE END OF THE ROAD AND THE STATION.
01/01/1947 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1947 (WRH) THE STATION WAS RECOVERED AS DESCRIBED. ALL MARKS ARE IN GOOD CONDITION. A COMPLETE DESCRIPTION FOLLOWS. THE STATION IS LOCATED ON A TIMBER COVERED RIDGE JUST SOUTH OF THE GLENWOOD VALLEY, ABOUT 8 MILES AIRLINE SOUTH SOUTHWEST OF GLENWOOD, ABOUT 15 MILES AIRLINE NORTHEAST OF WHITE SALMON, ABOUT 11 MILES AIRLINE NORTHWEST OF KLICKITAT. THE STATION IS A STANDARD STATION DISK STAMPED DIAMOND GAP 1946, WELDED TO THE TOP OF A 3 INCH PIPE THAT IS SET IN CONCRETE. IT IS 110 FEET NORTHEAST OF THE DIAMOND GAP LOOK OUT TOWER, 20 FEET NORTHEAST OF THE NORTHEAST GUY WIRE DEAD HEAD, ABOUT 200 FEET NORTHEAST OF THE HIGHEST POINT OF THE RIDGE, PROJECTS 6 INCHES ABOVE THE GROUND. REFERENCE MARK NUMBER ONE IS STAMPED DIAMOND GAP NO 1 1946, SET IN THE TOP OF A CONCRETE BLOCK, 12 FEET EAST OF A LARGE FIR TREE, 3 FEET LOWER THAN THE STATION, PROJECTS 8 INCHES ABOVE THE GROUND. REFERENCE MARK NUMBER TWO IS STAMPED DIAMOND GAP NO 2 1946, SET IN THE TOP OF A CONCRETE BLOCK, 13 FEET NORTHEAST OF THE NORTHEAST CORNER OF THE HOUSE, LIVING QUARTERS FOR THE FOREST SERVICE PERSONNEL, 5 FEET HIGHER THAN THE STATION, PROJECTS 8 INCHES ABOVE THE GROUND. THE DIAMOND GAP LOOKOUT TOWER IS A WOOD STRUCTURE 103 FEET FROM THE GROUND TO THE FLOOR OF THE SMALL BUILDING LOCATED ON TOP OF THE TOWER. THE BUILDING IS ABOUT 12 FEET SQUARE AND 10 FEET HIGH. THE TOWER IS ANCHORED BY CABLES RUNNING FROM EACH CORNER TO DEAD HEADS LOCATED ABOUT 75 FEET FROM THE BASE OF THE TOWER. TO REACH THE STATION FROM THE POST OFFICE IN GLENWOOD GO SOUTH ON THE WHITE SALMON ROAD FOR 9.9 MILES TO A ROAD LEFT AT A SIGN DIAMOND GAP L.O. TURN LEFT AND FOLLOW THE LOOKOUT ROAD FOR 2 MILES TO THE DIAMOND GAP LOOKOUT AND THE STATION AS DESCRIBED. OBSERVED FROM A 23.51 METER TOWER.
01/01/1956 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1956 RECOVERED AS DESCRIBED. ALL MARKS IN GOOD CONDITION.
01/01/1970 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1970 RECOVERD AS DESCRIBED.
01/01/1979 by WADNR (GOOD)
RECOVERY NOTE BY WA DEPT OF NAT RES 1979 (DS) DIAMOND GAP 1946 ALL MARKS ARE IN GOOD CONDITION. DIAMOND GAP NO 2 1946 ALL MARKS ARE IN GOOD CONDITION. DIAMOND GAP NO 1 1946 ALL MARKS ARE IN GOOD CONDITION. DISTANCE AND DIRECTION FROM NEAREST TOWN--7 MI. SSW OF GLENWOOD.
01/01/1987 by USFS (GOOD)
RECOVERY NOTE BY US FOREST SERVICE 1987 (KC) THE STATION AND BOTH REFERENCE MARKS WERE RECOVERED IN GOOD CONDITION. THE STATION IS LOCATED ABOUT 17 MILES NORTH NORTHEAST OF HOOD RIVER, OREGON, 8.5 MILES NORTH OF B Z CORNER AND 8.0 MILES NORTH NORTHWEST APPLETON ON THE FIRST RIDGE TOP SOUTHWEST OF DIAMOND GAP ON LAND OWNED BY THE WASHINGTON DEPARTMENT OF NATURAL RESOURCES. TO REACH THE STATION FROM THE JUNCTION OF WASHINGTON STATE HIGHWAY 14 AND SH 141 ALT AT THE EAST END OF THE WHITE SALMON RIVER BRIDGE, TURN NORTH ON 141 ALT AND GO NORTHERLY UP A WINDING HILL FOR 2.1 MILES TO A STOP SIGN AT THE JUNCTION WITH SH 141. CONTINUE NORTH ON 141 FOR 7.7 MILES TO A JUNCTION A B Z CORNER . TURN RIGHT (EAST) AND GO 9.0 MILES TO A CROSS ROAD WHERE ROAD G-5000 TURNS EAST. TURN RIGHT ONTO G-5000 AND GO 1.35 MILES TO A JUNCTION. TURN RIGHT AND GO 0.55 MILE TO A JUNCTION, TURN LEFT AND GO 0.1 MILE TO THE CIRCLE AT THE END OF THE ROAD. THE OLD LAUREL LOOKOUT TOWER ONCE STOOD INSIDE THE CIRCLE. THE STATION IS N 50 E 120 FEET FROM THE CENTER OF THE TOWER FOUNDATION. THE REFERENCE MARK 1 AND THE STATION MARK ARE SUITABLE FOR GPS SURVEYS. RM 1 WAS OCCUPIED DURING THIS SURVEY WHICH INDICATES THE PUBLISHED AZIMUTH TO SIGNAL PEAK USGS TO BE ERRONEOUS.
01/01/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (CWE) RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in December 1991.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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