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Details for Benchmark: JL0348

N 38° 23.745 W 107° 50.072 (NAD 83)

Altitude: 6092.41

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

Location:
In MONTROSE county, CO View Original Datasheet
Designation:
D 19
Marker Type:
bench mark 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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Really hard to miss this one.

[Photos:]
photoJL0348

Found as described.
Recovery report submitted to the NGS.

[Photos:]
photoJL0348 D 19 1928 (CLOSEUP) MONTROSE CO., CO
photoJL0348 D 19 1928 (VIEW S) MONTROSE CO., CO
Showing frontage road - useful for access
photoJL0348 D 19 1928 (VIEW N) MONTROSE CO., CO
Note metal stakes placed at four corners to form a 'box' around the station.
N 38° 23.742 W 107° 50.071

Bench Mark D 19 was recovered as described in 1991, in good condition.

[Photos:]
photoJL0348 20060512 G (Montrose Co. CO)
Bench Mark D 19 w/GPSr.
photoJL0348 20060512 C (Montrose Co. CO)
Bench Mark D 19.
photoJL0348 20060512 B (Montrose Co. CO)
Bench Mark D 19 from Eye Level.
photoJL0348 20060512 A1 S (Montrose Co. CO)
South at Bench Mark D 19.
photoJL0348 20060512 A2 E (Montrose Co. CO)
East at Bench Mark D 19.

In good condition, exactly on coordinates.

Documented History (by the NGS)

01/01/1928 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1928 6.6 MI SE FROM MONTROSE. ABOUT 6.6 MILES SOUTHEAST ALONG THE DENVER AND RIO GRANDE WESTERN RAILROAD FROM THE STATION AT MONROSE, MONTROSE COUNTY, ABOUT 0.6 MILE NORTHWEST OF THE UNCOMPAHGRE COMMUNITY CHURCH BUILDING, ABOUT 135 FEET SOUTHEAST OF MILEPOST D 358, 32 FEET SOUTHWEST OF THE CENTER LINE OF THE TRACK, ABOUT 9 YARDS NORTHEAST OF THE CENTER LINE OF A GRAVEL ROAD PARALLELING THE TRACK, IN LINE WITH A ROW OF POLES, AND ABOUT 1-1/2 FEET LOWER THAN THE TRACK. A STANDARD DISK, STAMPED 6088.311 D 19 1928 AND SET IN THE TOP OF A CONCRETE POST PROJECTING ABOUT 4 INCHES ABOVE GROUND.
01/01/1958 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1958 (OSR) STATION IS ABOUT 5 MILES SOUTH-SOUTHEAST OF MONTROSE AND 18 MILES NORTH-NORTHWEST OF RIDGWAY. ON THE RIGHT-OF-WAY OF THE DENVER RIO GRANDE RAILROAD. TO REACH FROM THE JUNCTION OF STATE HIGHWAY 90 AND U.S. HIGHWAY 550 IN MONTROSE, GO SOUTH ON U.S. HIGHWAY 550 FOR 6.1 MILES TO A CONCRETE BRIDGE. (AZIMUTH MARK IS IN THE SOUTHWEST CORNER OF THE SOUTH END OF BRIDGE ABUTMENT.) CONTINUE SOUTH ON U.S. HIGHWAY 550 FOR 0.2 MILE TO A SIDE ROAD RIGHT. TURN RIGHT ON TRACK ROAD, CROSSING RAILROAD TRACKS FOR 0.05 MILE TO A SIDE ROAD LEFT. TURN LEFT, SOUTH, FOR 0.05 MILE TO THE STATION ON THE LEFT. STATION MARK IS A STANDARD BENCH MARK DISK, STAMPED D-19 1928, SET IN THE TOP OF AN 11 INCH SQUARE CONCRETE POST PROJECTING 6 INCHES. IT IS 111 FEET SOUTHWEST OF THE CENTER OF U.S. HIGHWAY 550, 87 FEET NORTH OF A POWERLINE POLE, 29.7 FEET SOUTHWEST OF THE WEST RAIL OF RAILROAD TRACKS AND 27 FEET NORTHEAST OF THE CENTER OF TRACK ROAD. NO WITNESS POST WAS SET. REFERENCE MARK 1 IS A STANDARD DISK, STAMPED BM D-19 NO 1 1958, SET IN THE TOP OF AN 11 INCH SQUARE CONCRETE POST PROJECTING 6 INCHES. IT IS 112 FEET SOUTHWEST OF THE CENTER OF THE HIGHWAY, 67 FEET NORTHEAST OF THE POWERLINE POLE, 29.9 FEET SOUTHWEST OF THE WEST RAIL AND 27 FEET NORTHEAST OF THE CENTER OF TRACK ROAD. REFERENCE MARK 2 IS A STANDARD DISK, STAMPED BM D-19 NO 2 1958, SET IN THE TOP OF AN 11 INCH SQUARE CONCRETE POST PROJECTING 6 INCHES. IT IS 166 FEET SOUTHWEST OF THE CENTER OF THE HIGHWAY, 85.9 FEET SOUTHWEST OF THE WEST RAIL, 74 FEET NORTHWEST OF THE POWERLINE POLE AND 30 FEET SOUTHWEST OF THE CENTER OF THE TRACK ROAD. AZIMUTH MARK IS A STANDARD DISK, STAMPED BM D-19 1958, SET IN A DRILL HOLE IN THE SOUTHWEST CORNER OF THE SOUTH END OF BRIDGE ABUTMENT. IT IS 85 FEET NORTHWEST OF A DRIVEWAY LEADING ACROSS RAILROAD TRACKS, 53.2 FEET NORTHEAST OF THE EAST RAIL AND 19 FEET SOUTHWEST OF THE CENTER OF U.S. HIGHWAY 550. NO WITNESS POST WAS SET.
01/01/1973 by LOCENG (SEE DESCRIPTION)
RECOVERY NOTE BY LOCAL ENGINEER (INDIVIDUAL OR FIRM) 1973 (SS) RECOVERED BY - ADAMS ENGINEERING AZIMUTH MARK-GOOD CONDITION. ENCASED IN SW CORNER BRIDGE ABUTMENT
01/01/1984 by NGS (MARK NOT FOUND)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1984 MARK NOT FOUND.
06/28/1991 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1991 STATION IS LOCATED ABOUT 10 KM (6.2 MI) SOUTH-SOUTHEAST OF MONTROSE, 0.5 KM (0.3 MI) NORTHWEST OF THE JUNCTION OF US HIGHWAY 550 AND TROUT ROAD, ALONG AN OLD RAILROAD RIGHT-OF-WAY, BETWEEN THE HIGHWAY AND A GRAVEL ROAD, IN THE SOUTHWEST 1/4 OF SECTION 23, T 48 N, R 9 W. OWNERSHIP--STATE DEPARTMENT OF TRANSPORTATION. TO REACH FROM THE JUNCTION OF US HIGHWAYS 50, 550 AND STATE HIGHWAY 90 IN MONTROSE, GO SOUTHEAST ON HIGHWAY 550 FOR 3.35 MI (5.39 KM) TO THE BRIDGE OVER THE UNCOMPAHGRE RIVER. CONTINUE AHEAD FOR 3.2 MI (5.1 KM) TO A SMALL CONCRETE BRIDGE OVER THE DELTA CANAL. CONTINUE AHEAD FOR 0.45 MI (0.72 KM) TO THE STATION ON THE RIGHT. STATION MARK IS SET IN THE TOP OF A 30-CM SQUARE CONCRETE POST PROJECTING 20 CM ABOVE GROUND. IT IS 32.9 M (107.9 FT) SOUTHWEST OF, AND 1 M (3.3 FT) LOWER THAN THE HIGHWAY CENTER, 8.8 M (28.9 FT) NORTHEAST OF THE GRAVEL ROAD CENTER, 0.9 M (3.0 FT) NORTHWEST OF A FIBERGLASS WITNESS POST, 64.6 M (211.9 FT) NORTH-NORTHWEST OF TELEPHONE PEDESTAL 7 AT A STONE AND WOOD HOUSE, 84.1 M (275.9 FT) NORTHWEST OF A GRAVEL DRIVE LEADING TO THE STONE AND WOOD HOUSE, AND 80.3 M (263.5 FT) SOUTHEAST OF A GRAVEL DRIVE LEADING TO A WHITE SHINGLED HOUSE. DESCRIBED BY G.R.HEID
07/23/1998 by CODOT (GOOD)
RECOVERY NOTE BY COLORADO DEPARTMENT OF TRANSPORTATION 1998 (RSC) RECOVERED AS DESCRIBED.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in May 1992.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in 1992. * This is a POSTED BENCH MARK height. Code B indicates a distribution rate of 1.1 thru 2.0 mm/km.
  • 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.
  • 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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