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Details for Benchmark: SC2807

N 46° 07.250 W 122° 54.050 (NAD 83)

Altitude: 15.99

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

Location:
In COWLITZ county, WA View Original Datasheet
Designation:
KELSO CBL 150
Marker Type:
calibration base line disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

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Monument is part of a calibration base line. Standard NGS calibration base line taping disk, stamped "150 1987". Approx. 39' southwest of the taxiway centerline.

Documented History (by the NGS)

01/01/1987 by NGS (MONUMENTED)
08/30/1990 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1990 THE STATION IS LOCATED ABOUT 38.6 KM (24.0 MI) EAST OF CATHLAMET, 19.3 KM (12.0 MI) SOUTH-SOUTHWEST OF TOUTLE, 16.1 KM (10.0 MI) SOUTH OF CASTLEROCK AND AT THE AIRPORT IN KELSO, PERMISSION SHOULD BE OBTAINED FROM THE AIRPORT MANAGER, MR. HAROLD ONIEL, TELEPHONE NUMBER 206-423-5730. THE 150 POINT OF THE KELSO CALIBRATION BASE LINE. TO REACH FROM THE JUNCTION OF INTERSTATE HIGHAY 5 AND STATE ROUTE 432, EXIT 36 IN KELSO, GO WEST ON STATE ROUTE 432 FOR 0.64 KM (0.40 MI) TO A FORK. TAKE THE RIGHT FORK, KELSO INDUSTRIAL AREA, FOR 0.32 KM (0.20 MI) TO A T-INTERSECTION. TURN RIGHT AND GO NORTHWEST ON TALLY ROAD FOR 1.29 KM (0.80 MI) TO A SIDE ROAD LEFT. TURN LEFT ON PHARROH WAY FOR 0.48 KM (0.30 MI) TO SIDE ROAD LEFT. TURN LEFT INTO THE AIRPORT FOR 0.16 KM (0.10 MI) TO THE TERMINAL BUILDING ON THE RIGHT. PERMISSION CAN BE OBTAINED HERE. CONTINUE AHEAD FOR 0.08 KM (0.05 MI) TO A TAXIWAY. TURN RIGHT AND GO NORTHWEST ALONG THE TAXIWAY FOR 0.16 KM (0.10 MI) TO THE STATION ON THE LEFT. THE MARK IS SET IN THE TOP OF A ROUND CONCRETE MONUMENT THAT IS FLUSH WITH THE GROUND SURFACE. IT IS 12.0 M (39.4 FT) SOUTHWEST OF THE CENTER OF THE TAXIWAY AT A PAINTED ARROW. AT THE REQUEST OF THE AIRPORT MANAGER NO WITNESS POST WAS SET.
06/15/1994 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1994 THE STATION IS LOCATED AT THE KELSO-LONGVIEW AIRPORT NEAR THE NORTHWEST END OF THE FIELD ALONG THE NORTHEAST SIDE OF THE RUNWAY. IT IS 110.2 FT (33.6 M) NORTHEAST OF THE NORTHEAST EDGE OF THE RUNWAY, 209.5 FT (63.9 M) SOUTHEAST OF THE EAST CORNER OF THE CONCRETE BASE OF THE SOUTHEAST VASI, 50.0 FT (15.2 M) NORTHWEST OF THE EXTENDED LINE OF THE SECOND SET OF RUNWAY LIGHTS SOUTHEAST OF THE VASI, 39.8 FT (12.1 M) SOUTHWEST OF THE CENTER OF THE PARALLEL TAXIWAY AND 6.4 FT (2.0 M) SOUTHEAST OF THE EXTENDED LINE OF THE SOUTHEAST EDGE OF A BUILDING. THE STATION IS AN NGS CALIBRATION BASELINE DISK SET IN THE TOP OF A CONCRETE POST FLUSH WITH THE GROUND AND STAMPED 150 1987.
08/17/1996 by CHANCE (GOOD)
RECOVERY NOTE BY JE CHANCE AND ASSOCIATES 1996 (KAL) THE STATION IS LOCATED ABOUT 36 MILES (57.9 KM) NORTHWEST OF VANCOUVER, 11 MI (17.7 KM) SOUTH OF CASTLE ROCK, IN SOUTH KELSO, AT THE KELSO LONGVIEW REGIONAL AIRPORT, ROBERT OLSON - AIRPORT MANAGER, PHONE 360-425-3688 TO REACH THE STATION FROM THE JUNCTION OF INTERSTATE 5 AND STATE HIGHWAY 432 IN SOUTH KELSO, PROCEED WEST ON SH 432 0.45 MI (0.72 KM) TO THE EXIT AND JUNCTION WITH TALLEY WAY -KELSO INDUSTRIAL AREA EXIT-, TURN RIGHT AND PROCEED NORTH 0.75 MILES (1.21 KM) TO PARROTT WAY ON THE LEFT, TURN LEFT AND FOLLOW PARROTT WAY WEST AND NORTH 0.4 MI (0.6 KM) TO AN AIRPORT ENTRANCE ON THE LEFT LEADING TO -AERONAUTICS UNLIMITED-, TURN LEFT AND PROCEED WEST THROUGH THE GATE 0.1 MI (0.2 KM) SOUTHWEST ACROSS THE RAMP TO THE JUNCTION WITH TAXIWAY A, TURN RIGHT AND PROCEED NORTHWEST ALONG TAXIWAY A 0.15 MI (0.24 KM) TO THE STATION ON THE LEFT THE STATION IS A STANDARD NGS CALIBRATION BASELINE DISK SET IN THE TOP OF A ROUND CONCRETE MONUMENT, SET FLUSH WITH THE SURFACE. THE STATION IS LOCATED 33.7 M (110.6 FT) NORTHEAST OF THE NORTHEAST EDGE OF THE RUNWAY, 12.1 M (39.7 FT) SOUTHWEST OF THE CENTERLINE OF TAXIWAY A, 64.0 M (210.0 FT) EAST OF THE SOUTH END OF THE CENTER LIGHT OF A VASI, 33.75 M (110.73 FT) NORTH OF THE 6TH RUNWAY LIGHT SOUTHEAST OF THE END OF THE RUNWAY AND 51.75 M (169.78 FT) EAST OF THE 5TH RUNWAY LIGHT SOUTHEAST OF THE END OF THE RUNWAY
09/17/1997 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1997 (AJL) RECOVERED AS DESCRIBED. THE STATION IS A OFFSET PUNCH MARK IN THE TOP OF A STANDARD NGS CALIBRATION BASELINE DISK SET.
06/17/1998 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1998 (GAS) 0.1 KM (0.05 MI) WESTERLY ALONG ACADEMY STREET FROM THE POST OFFICE IN KELSO, THENCE 2.9 KM (1.80 MI) SOUTHERLY ALONG PACIFIC HIGHWAY, THENCE 0.1 KM (0.05 MI) EASTERLY ALONG A PAVED ROAD, THENCE 0.1 KM (0.05 MI) NORTHEASTERLY ALONG A TAXIWAY, THENCE 0.3 KM (0.20 MI) SOUTHEASTERLY ALONG A TAXIWAY, 61.3 M (201.1 FT) SOUTHEAST OF THE MOST SOUTHERLY SET OF VASI LIGHTS, 48.6 M (159.4 FT) NORTHEAST OF THE CENTERLINE OF A RUNWAY, 33.8 M (110.9 FT) NORTHEAST OF A RUNWAY LIGHT, 12.1 M (39.7 FT) SOUTHWEST OF THE TAXIWAY CENTERLINE, 0.3 M (1.0 FT) NORTHEAST OF A WITNESS POST, 0.3 M (1.0 FT) BELOW THE LEVEL OF THE TAXIWAY, AND THE MONUMENT IS FLUSH WITH THE GROUND SURFACE. NOTE--THE MONUMENT IS ON PR0PERTY OF THE KELSO/LONGVIEW AIRPORT, 222 PACIFIC HIGHWAY SOUTH, KELSO, WA 98626, TELEPHONE NUMBER (360) 425-3688.

Control Text

  • This mark is at Kelso-Longview Airport (KLS)
  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in May 2000.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (G = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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