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Building 989 - Diesel Generator Building for Building 99 1 Complex.
Building 984 - Drum crushing facility
Building 992 - Normally unoccupied Guard Post
Building 991, the main structure of the complex, is a one-story structure with a partial
basement. The 36,259 square foot building is primarily reinforced concrete and metal on metal
framing. Connected to Building 991 by corridors are Buildings 996, 997, 998, and 999. These
buildings and the corridors leading to them, comprising 20,940 square feet, are all underground
and made of reinforced concrete.
There are two support structures for Building 991, (1) Building 985, the Filter Plenum
Facility, and (2) Building 989, the Diesel Generator Facility. Building 992 is a former Guard
Post located southwest of the Building 991 facility that is normally unoccupied. Empty
Department of Transportation (DOT)-approved shipping containers and packaging materials,
and ARC= spare parts are stored in Building 984 which is’a metal shed located on the southeast
side of Building 991. Building 984 also contains the drum crushing operations. Receiving and
shipping dock facilities are located on the west and east sides of the building. Also on the west
side of the building, in close proximity to the dock area, is an out-of-service paint booth located
against the building’s west wall.
2.2.3 Building 991
The design for Building 991 was completed in 1951 and followed structural military
protection criteria. The original structure, which included Buildings 996, 997, and 998 plus
Corridors A, B and C, was completed in 1952. A subsequent addition, Building999, was
constructed adjacent to Corridor C in 1956. Three major additions have been built since then:
(1) a west side loading dock, (2) a radiography vault., Rooms 164 and 165, was added in the
northeast corner, and (3)a covered loading dock and maintenance area was added on the
southeast side of Building 991. The Building 991 floor plans are as shown in Figures 2-3
through 2-5.
The foundations of Building 991 are composed of footings and foundation walls. There
are three basic types of footings: (1) individual spread footings, (2) combined footings, and
(3) wall footings. The individual spread footings vary from 39 inches square by 15 inches thick
to 48 inches square by 15 inches thick. The combined footings are of two types: (1) 3 feet wide
by 15 feet long and either 2 feet or 2 feet 7 inches thick, and (2) 5 feet 2 inches wide by 19 feet
long by 2 feet thick. The wall footings vary from 2 feet wide by 10 inches thick to 5 feet wide
by 1 foot 6 inches thick (Ref. 5).
Revision 1
Building 991 Complex FSAR
Scptemher 1999 I