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Details for Benchmark: UW7512

N 60° 50.950 W 149° 03.328 (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:
INGRAM
Marker Type:
triangulation station disk
Setting:
in rock outcrop
Stability:
Most reliable and expected to hold position/elevation well.

Reference Points

Must Read!

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Found in good condition along with both RM's. Guided in by NorthWes on a beautiful April Saturday.

[Photos:]
photoINGRAM - Anchorage, AK
photoINGRAM RM1 - Anchorage, AK
photoINGRAM RM1 - Anchorage, AK
photoINGRAM RM2 - Anchorage, AK
photoINGRAM RM2 - Anchorage, AK

Located this bench mark by accident in 04 while fishing for Dolly Varden of this rock outcropping. Thought it would be fun to make it official and log it and also to look for the DM2. There is a great geocache close by, as well. That is what we were specifically after on this trip. Wife and I each caught a pink salmon and accidently snagged a few more while waiting for a school of Coho to swim by, which they never did. The Pink Salmon were in especially rough looking shape for being caught early in the season and considering were were at the edge of the saltwater. Normally, the fish are rather bright and fresh in this location. Picked up a bunch of trash on the way out.

[Photos:]
photoTrail to UW7512 Ingram
Nice path to Ingram

Found the station and both reference marks during a break in the rain. The main station was completely covered by a light layer of soil but was quickly found.

[Photos:]
photoUW7512 Disk, Portage AK
Close up of Ingram station disk
photoIngram RM1 Disk
View of RM1 disk and relation to rock outcrop edge.
photoIngram RM2 Disk
Close up shot of RM2 disk

First ones to log this one this year. The benchmark is still in good shape and it hasn't been covered by any dirt. Mrs. Claw found it pretty quickly. The trail was really pretty but full of mosquitoes and a few piles of bear poop. Mrs. claw wishes she wasn't as scared of real bears as much as she is.

Found as described.

Following a third of a mile walk from the trailhead on a well-defined trail we (Mrs NW & I plus the dogs) reached the end of the rocky peninsula hard alongside the west edge of Ingram Creek. The two reference marks were immediately found, but triangulation station disk INGRAM was not to be seen. After unloading my backpack, reading the National Geodetic Service (NGS) datasheet (with more info listed than on the geocaching.com page), and measuring from nearby trees and the two reference marks it became obvious that INGRAM itself was buried under the loess (windblown soils carried from nearby Turnagain Arm - even as we sat here the wind was blowing silt in from the exposed mudflats at low tide!). A few minutes' work with my knife to carefully slice away a 4" deep layer of soil produced the mark! Since its placement in 1964 no one has logged a recovery update with the NGS, so it's plausible that the 4" of overburden have been laid down over the past 43 years. I took great care to only remove enough soil to see the triangulation station mark in its entirety.

Recovery report submitted to the NGS.

[Photos:]
photoUW7512 INGRAM 1964 (closeup) Kenai Pen Boro, AK
photoUW7512 INGRAM RM1 (closeup) Kenai Pen Boro, AK
RM1 lies on the very NE tip of rock on the peninsula, with no room for me out above the mark, so an angled view was necessary.
photoUW7512 INGRAM RM1 (view NE) Kenai Pen Boro, AK
Looking NE from triangulation station INGRAM over RM1 disk (circled in yellow at bottom center-left) across upper Turnagain Arm towards the TwentyMile River valley (three miles distant) and the Seward Highway.
photoUW7512 INGRAM RM2 (closeup) Kenai Pen Boro, AK
RM2 lies to the SW of the main disk, alongside the trail accessing the station, on the rock right above the creek.
photoUW7512 INGRAM RM2 (view NE) Kenai Pen Boro, AK
View across RM2 towards station location (at right edge of willow bush in center left of photo) and RM1's location. The north side of Turnagain Arm is visible in the distance.
photoUW7512 INGRAM 1964 (view SW) Kenai Pen Boro, AK
Looking SW from the mark up Ingram Creek. The Seward Highway lies just beyond the brushline in the distance. Mrs NW & the dogs are in front of RM2's location. This mark is only 8 feet above the creek at high water; the tide range here is nearly 37 feet! Today there were pink salmon in the stream below us... we kept a sharp eye out for bears, but saw only their tracks accessing the exposed tidal beach below and SW of us.
photoUW7512 INGRAM 1964 (view NE) Kenai Pen Boro, AK
Looking across station (in depression, to right of the green compass on the ground) NE towards the TwentyMile River valley across Turnagain Arm. It's low tide, so the stream channels and mudflats are exposed to view.
photoUW7512 INGRAM 1964 (closeup) Kenai Pen Boro, AK
An area view, showing the 4" incision in the loess atop the bedrock made for the purpose of exposing the triangulation station mark.
photoUW7512 INGRAM 1964 (view SE) Kenai Pen Boro, AK
Looking SE over the station mark across the mouth of Ingram Creek, towards the mountains along the southern side of the Portage River valley at the head of Turnagain Arm.

Documented History (by the NGS)

01/01/1964 by CGS (MONUMENTED)
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

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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