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Details for Benchmark: UV4379

N 61° 28.684 W 149° 15.031 (NAD 83)

Altitude: 0

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

Location:
In county, AK View Original Datasheet
Designation:
BRIDGE
Marker Type:
triangulation station disk
Setting:
setting not listed - see description
Stability:
Mark of questionable or unknown stability.

Reference Points

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Found in poor condition. Station is leaning and is loose in it's setting. Both Reference marks recovered in good condition.

[Photos:]
photoUV4379 Disk, Anchorage AK
Close up shot of Bridge disk
photoBridge, Anchorage AK
Leaning station with old tower in the background
photoBridge RM 1 Disk
Close up of Reference Mark 1 Disk
photoBridge RM 1 Area
Wide view of RM 1 area
photoRM 1 looking to Bridge Station
Minor brush was present between RM 1 and Bridge station.
photoRM 2 Disk UV4379
Close up of disk
photoRM 2 Area
Wide view of RM 2 showing Birch tree near by.

We found the 3 reference points while finding the Knik Bridge Overlook Cache.

[Photos:]
photoCloseup of the Bridge Reference Point
photoCloseup of the Bridge 1 Reference Point
photoCloseup of the Bridge 2 Reference Point
photoPicture of wooden surveyor structure

Found this one at N 61 28.684 W 149 15.031 at altitude of 441'... Also found a reference no. 1 marker, did not realize there were two extra markers, so I only photographed two, the main one and ref. #1... pieces of original pedestal were still there, though on it's side...

[Photos:]
photomain one triangle
this one is in excellant shape, right on the money for coords...
photoref. marker #1
this one is a little ways off to one side (neglected to get a reading waypoint on this one, but is easilly visible from the main stantion...
photothe original tower
tower stills exists, but is on it's side

Found as described. Recovered mark, RM 1 and RM 2 in good condition. Remains of the 1964 tower were found lying next to the benchmark. No recoveries listed since monument placed in 1964 - a timespan of 43 years. Report submitted to NGS.

[This entry was edited by NorthWes on Sunday, April 22, 2007 at 5:16:44 PM.]

[Photos:]
photoUV4379 BRIDGE 1964 (closeup) ANCHORAGE, AK
This triangulation station disk has been on my 'to find' wish list for a long long time. It's about 300 yards from the Glenn Highway bridge crossing the Knik River, but atop a difficult-to-access bluff with cliff-like terrain on all four sides.
photoUV4379 BRIDGE 1964 (closeup2) ANCHORAGE, AK
Listed as an adjusted station, my handheld GPS showed only a 6-foot difference in location. This station was easy to locate once on site!
photoUV4379 BRIDGE 1964 (area) ANCHORAGE, AK
View towards west of station, showing tower lying on ground near the station. The height of the pipe made this and the nearby reference marks easy to find before the spring foliage had grown up here.
photoUV4379 BRIDGE 1964 (area) ANCHORAGE, AK
View towards SE showing tower (in foreground) and the station.
photoUV4379 BRIDGE 1964 (RM1 disk) ANCHORAGE, AK
Reference Mark 1 lies north of the mark about 7 yards.
photoUV4379 BRIDGE 1964 (view to RM1) ANCHORAGE, AK
Looking north across the station to RM1 (marked with survey flagging).
photoUV4379 BRIDGE 1964 (RM2 disk) ANCHORAGE, AK
Note birch tree at top of photo; this is described in the original monument log. No distinctive evidence of blaze on tree was found. RM2 is south of station.
photoUV4379 BRIDGE 1964 (view to RM2) ANCHORAGE, AK
Looking south across station to RM2.
photoUV4379 BRIDGE 1964 (area) ANCHORAGE, AK
View from RM2 north towards station (grey pipe to right of grey backpack) and tower remains.
photoUV4379 BRIDGE 1964 (access) ANCHORAGE, AK
Typical terrain enroute to station from parking area on Old Glenn Highway, .45 miles south of mark.

Documented History (by the NGS)

01/01/1964 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1964 (LGB) THE STATION IS LOCATED ABOUT 15 MILES NORHTWEST OF EAGLE RIVER, 9-1/2 MILES SOUTHWEST OF PALMER, 7-1/2 MILES WEST-SOUTHWEST OF THE BRIDGE OVER THE KNIK RIVER, ON THE MOST NORTHERLY POINT OF A SMALL TIMBER COVERED RIDGE. TO REACH THE STATION FROM THE POST OFFICE IN EAGLE RIVER, GO NORTHERLY ON ALASKA STATE HIGHWAY 1 FOR 13.0 MILES TO A RAILROAD CROSSING. CONTINUE AHEAD, NORTHERLY, ON ALASKA STATE HIGHWAY 1 FOR 3.3 MILES TO RAILROAD TRACKS AND RAILROAD CROSSING. CROSS OVER RAILROAD TRACKS AND TURN LEFT AND GO NORTHERLY ON TRACK ROAD FOR 0.1 MILE TO THE END OF TRUCK TRAVEL. TO REACH THE STATION FROM THE END OF TRUCK TRAVEL, PACK NORTHERLY DOWN RAILROAD TRACKS TO THE FIRST CUT BANK ON THE LEFT. TURN LEFT AND PACK WEST UP HILL TO A POWER LINE CROSSING. CONTINUE WEST UP GRADE TO THE TOP OF THE RIDGE, THEN BEAR RIGHT AND PACK NORTHERLY TO THE MOST NORTHERLY POINT AND THE STATION. THERE IS HIGHER GROUND TO THE WEST. A 1-HOUR PACK IS REQUIRED TO REACH THE STATION FROM THE END OF TRUCK TRAVEL. THE STATION MARK IS A STANDARD DISK STAMPED BRIDGE 1964, BRAZED TO THE TOP OF A 1-1/2 INCH GALVANIZED PIPE WHICH PROJECTS 14 INCHES ABOVE THE GROUND SURFACE. IT IS 25.8 FEET NORTH OF A BIRCH TREE WITH A TRIANGLE BLAZE, AND 10 FEET EAST OF A BIRCH TREE WITH A TRIANGLE BLAZE. REFERENCE MARK 1 IS A STANDARD DISK STAMPED BRIDGE NO 1 1964, BRAZED TO THE TOP OF A 1-1/2 INCH GALVANIZED PIPE WHICH PROJECTS 14 INCHES ABOVE THE GROUND SURFACE. IT IS 8 FEET NORTHWEST OF A ALDER TREE WITH A TRIANGLE BLAZE. IT IS 1 FOOT LOWER THAN THE STATION IN ELEVATION. REFERENCE MARK 2 IS A STANDARD DISK STAMPED BRIDGE NO 2 1964, BRAZED TO THE TOP OF A 1-1/2 INCH GALVANIZED PIPE WHICH PROJECTS 14 INCHES ABOVE THE GROUND SURFACE. IT IS 1 FOOT NORTH OF A BIRCH TREE WITH A TRIANGLE BLAZE. IT IS 2-1/2 FEET LOWER THAN THE STATION IN ELEVATION. NO AZIMUTH WAS SET FOR THIS STATION.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in July 1986.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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