A vault at the south end of the second floor stacks is the home of the Security Copy Depository operated by the Information and Records Management Unit of the Archives. This service provides low cost security microfilm storage for Oregon state agencies and local governments.
In order to be accepted into the Security Copy Depository, microfilm must meet certain national standards. These include the requirements that the microfilm be made of high quality silver halide and contain no more than six splices per reel. Additionally, microfilm with a retention period of 100 years or more must be treated with polysulfides to protect against microspotting.
The Depository has a capacity of approximately
500,000 reels of microfilm. These records are
generally accessed only to make copies for agencies
in cases when working copies have been destroyed or
simply wear out. The Depository provides government
officials with the knowledge that key records can
be replaced in a short period of time in the event
of a disaster. For security reasons, access to this
vault is limited to a small number of Archives