Logging history
This aerial photo is one of the earliest ones we have, showing the property prior to any logging, but after the initial road was built and when the sand pit had been established. Most prominently, the western and southern portions were mature and well-established spruce forests.
Seismic survey lines can be seen extending out what is now the runway to the southeast right over the Twitter Creek river valley and up Crossman Ridge.
Marston mat
You may find Pierced Steel Planking (PSP) making up some of our trails here at Twin Rivers Wilderness, also known as Marston Mat.
These planks were used to effectively ‘pave’ a large area over difficult-to-build terrain, usually making up airfields in Alaska during WWII. They weigh about 66 lbs and are 10’ long and 15” wide and interlock in a staggered pattern, small enough to be easily deployed manually by soldiers, and mobile enough to build a full military runway over natural and even wet terrain such as found in the Aleutians and Southwest Alaska where the Japanese made their first invasion of US territory in WWII.
References: Marston Mat. Wikipedia.