[BCMA] wooden culvert

[Moderated BCMA subscriber listserv.]

The Vanderhoof Forest Service donated this wooden culvert to the Vanderhoof
Museum. It is in mint condition.
We are looking for information about this type of wooden culvert ?
It is the only known one in this area. It has been buried for at least 80
years+. Maybe even over 100 years as the road was built in 1914-1917.
How do we preserve it?
Any information would be greatly appreciated.
Anne
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