A network of 1,250 depository libraries provides access to print and microfiche copies of documents, as well as electronic databases. There are two types of depository libraries: regional and selective. Selective depositories choose the kinds of publications they wish to receive based upon the needs of their local constituencies. Regional depositories receive copies of every physical title distributed by the government, and maintain those copies in perpetuity. You can search for your local Federal Depository Library by state, area code, or congressional district.
Documents use a different call number system than the rest of the library, one based on the agency or organization issuing the document. A good explanation of the system is provided by the Superintendent of Documents.
The West Virginia Regional Depository is at West Virginia University (largest collection in the state)
West Virginia Selective Depositories are at: