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Details for Benchmark: AI4908

N 58° 17.946 W 134° 25.163 (NAD 83)

Altitude: 29

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

Location:
In JUNEAU BOROUGH county, AK View Original Datasheet
Designation:
JNU TIDAL GPS
Marker Type:
survey disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Found while visiting Juneau.

Discovered in Juneau on a port day.

Found where described

[Photos:]
photoMark
photoEye level
photoFor reference

Found while geocaching

Nice spot.

[Photos:]
photoDisc

Nice, good to get the Benchmark. We got hassled by a homeless person who was fishing. I think he was living near and we were in his space

Visiting from Ohio on the Explorer of the Seas...a cache brought me to this benchmark, which is clear and visible (unlike the cache, haha).

Found this one before we actually found the cache. Great coming across Benchmarks.

tftbm

Found this one while looking for a nearby cache, which I did not locate.

Found while on an Alaskan cruise.

This entry was edited by seadog129 on Wednesday, 17 June 2015 at 14:12:44 UTC.

[Photos:]
photoAI4908

Found this one when looking for a different cache. I was with JNUKAYAKER and AKBIRDER. Great evening.

This entry was edited by AKBurque on Tuesday, 23 July 2013 at 01:17:08 UTC.

Found this while searching for the Tidal GPS cache.

Out looking for a nearby geocache and grabbed this benchmark. Easy find.

Out with BerrySeeker3 on a sunny May evening, doing cache maintenance and placing a new geocache in the area, and came across this benchmark. Hopefully with the new cache, this benchmark will receive more visitors.

At last! A Benchmark that we can find on the list! We've found a few and have photos of them but are still trying to figure out how to get them logged. This one is easy but be wary of the street people hanging out in the area.

Found while walking to the Federal Building. The mark is just off the sidewalk and near the "J" shaped pipe.

[Photos:]
photoJNU TIDAL GPS - Juneau, AK
photoJNU TIDAL GPS - Juneau, AK

I go by this benchmark almost everyday, never noticed until now.

too bad the early king salmon run hasn't started yet.

Right where it was supposed to be. Giant ravens in the area.

[Photos:]
photoBenchmark - Juneau AK
photoBenchmark Area - Juneau AK

Right next to the candy cane pipe between Egan Dr and the A&P Parking lot

Documented History (by the NGS)

01/01/1999 by R+MCON (MONUMENTED)
DESCRIBED BY R + M CONSULTANTS INCORPORATED 1999 (RHB) DESCRIBED BY R+M CONSULTANTS 1999 (RHB) . THE STATION IS LOCATED IN DOWNTOWN JUNEAU ALONG THE NORTH SIDE OF EGAN DRIVE JUST WEST OF GOLD CREEK AND WITHIN THE RIGHT OF WAY FOR EGAN DRIVE. OWNERSHIP --STATE OF ALASKA. ACCESS IS UNRESTRICTED. TO REACH THE STATION FROM THE NORTH END OF THE JUNEAU/DOUGLAS BRIDGE, PROCEED SOUTHEASTERLY 0.16 KM (0.10 MI) ALONG EGAN DRIVE TO THE EAST EDGE OF THE BRIDGE SPANING GOLD CREEK AND THE STATION ON THE LEFT. THE STATION IS A STANDARD NOS BRASS DISK STAMPED --JNU TIDAL GPS 1999-- AND SET FLUSH IN A 2.4 M (7.9 FT) DIAMETER CONCRETE SEWER MANHOLE 0.6 M (2.0 FT) EASTERLY OF CENTER. THE STATION IS LOCATED 0.9 M (3.0 FT) 107 DEGREES MAGNETIC AZIMUTH FROM THE EASTERLY EDGE OF A 0.15 M (0.49 FT) DIAMETER CANDY CANE VENT PROTRUDING FROM THE MANHOLE, 35.0 M (114.8 FT) 177 DEGREES MAGNETIC AZIMUTH FROM THE SOUTHWEST CORNER OF -FO0DLAND CENTER SUPER MARKET-, 9.6 M (31.5 FT) 75 DEGREES MAGNETIC AZIMUTH FROM THE NORTHEAST CORNER OF A CONCRETE BRIDGE SPANNING GOLD CREEK, AND 9.1 M (29.9 FT) 10 DEGREES MAGNETIC AZIMUTH FROM CENTERLINE WEST-BOUND EGAN DRIVE.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in April 2000. This is a SPECIAL STATUS position. See SPECIAL STATUS under the DATUM ITEM on the data sheet items page.
  • The orthometric height was determined by differential leveling. The vertical network tie was performed by a horz. field party for horz. obs reductions. Reset procedures were used to establish the elevation. No vertical observational check was made to the station.
  • Photographs are available for this station.
  • 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.

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