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Details for Benchmark: MR0680

N 41° 01.089 W 111° 06.626 (NAD 83)

Altitude: 9200

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

Location:
In SUMMIT county, UT View Original Datasheet
Designation:
PORCUPINE
Marker Type:
triangulation station disk
Setting:
in a boulder
Stability:

Reference Points

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One inch copper bolt with center punch & U S G S stamped on top.

[Photos:]
photoMR0680 USGS PORCUPINE 1938
photoMR0680 BOLT EAST FACE
photoMR0680 N
LARGE CAIRN BEARS 007 DEGREES 0.11 MI
photoMR0680 LARGE CAIRN
ABOUT SEVEN FT HIGH WITH A FIVE FT BASE
photoMR0680 SW
DIS-MANTLED CAIRN
photoMR0680 SSE
TO RM 1
photoMR0680 RM 1 1938
WAS THIS CGS DISK PLACED BY USGS?
photoMR0680 SW
TO RM 2
photoMR0680 RM 2 1938
WAS THIS CGS DISK PLACED BY USGS?
photoMR0680 H W HICLEY
ON SOUTH FACE OF LARGE CAIRN
photoMR0680 BILLY 14 1949
ON E FACE OF LARGE CAIRN
photoMR0680 ASPENS
NE FROM THE LARGE CAIRN
photoCHALK BUTTE - PORCUPINE
SCALED ON GOOGLE EARTH

Documented History (by the NGS)

01/01/1938 by USGS (MONUMENTED)
DESCRIBED BY US GEOLOGICAL SURVEY 1938 (FGJ) STATION IS IN THE EASTERN PART OF UTAH IN THE NORTHWESTERN PART OF SUMMIT COUNTY. IT IS ON A BARE TOPPED MOUNTAIN ON PORCUPINE RIDGE WHICH IS ABOUT FOUR MILES WEST OF CHALK CREEK. SURFACE MARK IS A COPPER BOLT IN A BOULDER. REFERENCE MARKS ARE STANDARD BRONZE DISKS SET IN BOULDERS. AZIMUTH MARK IS A STANDARD BRONZE DISK IN BEDROCK. LOCATED ABOUT 18-1/2 MILES AIRLINE SOUTH-SOUTHWEST OF EVANSTON, WYO., 17 MILES EAST-NORTHEAST OF COALVILLE, UTAH, AND ABOUT 4-1/2 MILES W OF WYOMING-UTAH STATE LINE. REACHED FROM COALVILE BY GOING EAST ON THE FIRST STREET SOUTH OF WARDS SERVICE STATION AND CAMP, GRAVEL, LEADING UP THE LEFT SIDE OF CHALK CREEK FOR 18.1 MILES TO THE PINE CLIFF DANCE HALL, AND CABINS ON THE RIGHT. THENCE CONTINUE NORTHEASTERLY UP CHALK CREEK, GRADED DIRT, FOR 5.5 MILES TO A FORK. THENCE LEFT FORK ON MAIN TRAVELED ROAD TO A BLACK TAR PAPER BUILDING ON THE LEFT. THENCE CONTINUE STRAIGHT AHEAD FOR 0.9 MILE TO A FORK. THENCE LEFT FORK NORTHWEST AND NORTH FOR 0.6 MILE TO THE TOP OF A SMALL RIDGE 0.1 MILE BEYOND A WOOD BRIDGE. THENCE LEFT, WESTERLY, ON DIM TRAIL TO A DIM T ROAD ON TOP OF A SMALL RIDGE. THENCE CONTINUE WESTERLY CROSS COUNTRY CROSSING A DRY WASH AND KEEPING TO THE NORTH OF A SMALL WASH WITH A LITTLE WATER IN IT FOR 0.3 MILE TO A WELL-TRAVELED TRAIL ROAD. THENCE BEAR LEFT AND FOLLOW TRAIL ROAD NORTHWESTERLY UP A RIDGE FOR 1.3 MILES TO AN OLD TRAIL FORK, THENCE KEEP LEFT FORK 0.05 MILE. THENCE BEAR LEFT ON DIM TRACKS, KEEPING TO THE LEFT OF A ROCK OUTCROP, AND GO NORTHWESTERLY UP HILL FOR 0.1 MILE TO HITTING A WELL-TRAVELED TRAIL ON TOP OF THE RIDGE. THENCE LEFT ON TRAIL ROAD AND GO WESTERLY ALONG TOP OF RIDGE FOR 1.3 MILES TO A FORK. THENCE LEFT FORK AROUND THE SOUTH SIDE OF A SMALL HILL FOR 0.2 MILE TO A FORK. THENCE LEFT FORK WESTERLY UP ALONG THE TOP OF RIDGE FOR 1.3 MILES TO WHERE THE ROAD STARTS TO DESCEND. THERE IS TIMBER ON THE RIGHT SIDE OF ROAD AND A BARE ROUND TOP KNOLL JUST TO THE LEFT. FROM HERE THE STATION BEARS ABOUT SOUTH-SOUTHWEST ON THE SOUTH PART OF THE HIGHEST HILL IN THE VICINITY. PACK FROM HERE TO THE SW DOWN HILL ABOUT 100 YARDS TO TIMBER LINE AND PICK UP STOCK TRAIL THAT LEADS AROUND THE NORTH AND WEST SIDE OF A SMALL KNOLL TO A HOGS BACK, THEN SOUTH ALONG TOP OF RIDGE TO TOP OF HILL AND STATION. THERE IS A LARGE ROCK CAIRN ON THE N PART OF THE HILL ABOUT 600 FEET N OF THE STATION AND ANOTHER LARGE CAIRN 20 FEET WEST OF THE STATION. THE AZIMUTH MARK IS SET IN THE ROCK OUTCROP MENTIONED IN THE DESCRIPTION AND IS ABOUT 2 MILES NORTHWEST AND ABOUT 800 FEET LOWER THAN THE STATION. STATION IS MARKED BY A 1-INCH COPPER BOLT WITH A SMALL TRIANGLE IN THE CENTER MARKED USGS. AZIMUTH AND REFERENCE MARKS ARE STAMPED PORCUPINE 1938. HEIGHT OF LIGHT ABOVE STATION MARK - 1 METER.
01/01/1962 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1962 (JCC) THE STATION MARK, REFERENCE MARKS 1, 2 AND THE AZIMUTH MARK WERE RECOVERED IN GOOD CONDITION. DUE TO ROAD CHANGES A NEW COMPLETE DESCRIPTION FOLLOWS. THE STATION IS ON A HIGH, BARE TOPPED RIDGE, ABOUT 3-1/2 MILES WEST OF THE UTAH-WYOMING STATE LINE AND 17 MILES SOUTHWEST OF EVANSTON, WYOMING. TO REACH THE STATION FROM FRONT STREET AND WHERE U.S. HIGHWAY 30 S TURNS EAST UNDER THE UNDERPASS IN EVANSTON, GO SOUTH ON FRONT STREET WHICH LATER BECOMES STATE HIGHWAY 150, FOR 0.8 MILE TO THE WYOMING STATE HOSPITAL ON THE LEFT. CONTINUE SOUTHERLY ON THE HIGHWAY FOR 7.75 MILES TO A BRIDGE OVER THE BEAR RIVER. CONTINUE SOUTHERLY AND WEST ON THE HIGHWAY FOR 10.95 MILES TO WHERE THE HIGHWAY TURNS LEFT AND A GRAVELED ROAD CONTINUES STRAIGHT AHEAD AND AN OLD SCHOOL HOUSE IN THE SOUTHWEST ANGLE OF THE ROADS. CONTINUE AHEAD, WEST ON THE GRAVELED ROAD FOR 1.25 MILES TO A CROSSROAD. CONTINUE AHEAD, WEST, ON THE GRAVELED ROAD FOR 1.25 MILES TO A WOODEN BRIDGE OVER THE BEAR RIVER. CROSS BRIDGE AND CONTINUE ON THE MAIN ROAD FOR 2.15 MILES TO A SMALL WOODEN BRIDGE. CROSS BRIDGE AND CONTINUE ON THE MAIN ROAD FOR 3.35 MILES TO A FORK. TAKE THE LEFT FORK FOR 1.6 MILES TO A TRACK ROAD RIGHT AND A SIGN, THESE LANDS ARE CONTROLLED BY ECHO CREEK RANCH OWNERS PROTECTIVE ASSOC. INC. TURN RIGHT OFF MAIN ROAD AND FOLLOW TRACK ROAD FOR 0.65 MILE TO A FORK. TAKE THE RIGHT FORK FOR 0.15 MILE TO A WIRE GATE. PASS THROUGH GATE AND CONTINUE ON TRACK ROAD FOR 0.5 MILE TO A CREEK AND AN OLD LOG CABIN ON THE LEFT. CROSS CREEK AND CONTINUE ON TRACK ROAD FOR 0.55 MILE TO A WIRE GATE AND A CORRAL ON THE LEFT. PASS THROUGH GATE AND CONTINUE ON TRACK ROAD FOR 0.8 MILE TO A SIDE ROAD RIGHT. (TO REACH THE AZIMUTH MARK, TURN RIGHT ON SIDE ROAD FOR 0.8 MILE TO A WIRE FENCE, CROSS FENCE AND PACK NORTHEAST FOR ABOUT 200 YARDS TO A LARGE OUTCROP OF ROCK AND THE MARK.) CONTINUE AHEAD ON THE MAIN ROAD, UP HILL FOR 0.4 MILE TO A FORK. TAKE THE LEFT FORK FOR 0.2 MILE TO A FORK. TAKE THE LEFT FORK FOR 0.8 MILE TO A WIRE FENCE AND A LOCKED GATE. PACK WESTERLY ALONG THE LEFT SIDE OF THE FENCE FOR ABOUT 1 MILE, THEN TURN LEFT AND FOLLOW THE FENCELINE SOUTHERLY, UP HILL FOR ABOUT 3/4 MILE TO THE TOP OF THE HILL, THEN PACK SOUTHWESTERLY ACROSS THE TOP OF THE HILL TO THE HIGHEST POINT AND THE STATION. STATION MARK IS A 1 INCH COPPER BOLT WITH A SMALL TRIANGLE IN THE CENTER, STAMPED USGS. IT PROJECTS 2 INCHES. REFERENCE MARK 1 IS A STANDARD DISK, STAMPED PORCUPINE NO 1 1938, CEMENTED IN A DRILL HOLE IN A 2 X 4 FOOT OUTCROP OF ROCK PROJECTING 1 FOOT. IT IS ABOUT THE SAME ELEVATION AS THE STATION. REFERENCE MARK 2 IS A STANDARD DISK, STAMPED PORCUPINE NO 2 1938, CEMENTED IN A DRILL HOLE IN A 1 X 2 FOOT OUTCROP OF ROCK PROJECTING 4 INCHES. IT IS ABOUT 1 FOOT LOWER THAN THE STATION. AZIMUTH MARK IS A STANDARD DISK, STAMPED PORCUPINE 1938, CEMENTED IN A DRILL HOLE IN A 2 X 3 FOOT OUTCROP OF ROCK PROJECTING 2 FEET TO THE SOUTH AND FLUSH TO THE NORTH. IT IS 3.7 FEET SOUTH-SOUTHWEST OF A WITNESS POST AND ABOUT 200 YARDS NORTHEAST OF WHERE A FENCE BLOCKS THE TRACK ROAD.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in November 1997.
  • 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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