Vault is located on Birch Creek Schist on outskirts of Fairbanks. The piers are constructed of nonreinforced concrete, rest directly on the Birch Creek schist, and are isolated from the vault floor by two inches of cork. Electric heaters are used to control temperature in the vault.
Relative humidity is low.
Station Instrumentation 1. Feb 1987 to 07 Mar 1991 3.