vide a 25 ft. road at an elevation of +8.5 ft. MLWS. Figures 28 and 29 show the construction percentages and completion dates of all expendable construction, Figure 30 shows the monthly construction progress of the over-all program. 2.6.4 ASSEMBLY AREA In order to outfit barges that were to be used as Zero Stations, it was necessary to design and construct a barge slip with a traveling gantry crane which could be used for the construction of the barge superstructure as well as the final installation of the test devices. To complement this barge slip, the design and construction of various buildings and facilities was necessary so that critical components could be stored, assembled and moved onto the ~ barges. This entire project, shown in Figure 31, was known as the Assembly Area, within which the following construction was accomplished. 1. Building 411. The purpose of this building was primarily for the as- sembly of the test devices. It was a one-story steel frame structure with roofing and siding of steel, 44'-0" x 83'-0" x 34'-9" high with a steel frame leanto 16'-3 3/4" x 83'-0" x 8'-9" high erected on con- crete footings and floor slab, Interior partitions of wood frame provided rooms for layout, a latrine, instruments and assembly. The instrument and assembly rooms were vapor sealed. Within the assembly room was instalNed a 25-ton traveling bridge crane, high intensity lighting, and other necessary utilities. The assembly and instrument rooms were dehumidified. 2. Building 412. The purpose of this building was for the handling, storing, and working of high explosive materials. This was a one-story steel frame structure with steel siding and roofing, 25'-6" x 31'-6" x 18'-6"' high with steel frame leanto 9'-6" x 25'-6''! x 8'-O" high, erected on reinforced concrete footings and floor slab. The building was vapor sealed, and within it were installed a five-ton traveling bridge crane; work benches, and necessary utility outlets, Part of the wiring was explosion-proof, and a ground grid was furnished outside of the building to provide a positive grounding system. The building was dehumidifie d. 3. Building 413. This was a magazine for the storing of explosives. It was a reinforced concrete structure of one room 22!'-0" x 22!-0" x 14'-4" high with an earth covering of 3 ft. and side berm protection; Explosion-proof wiring was used. 4. 62 Building 414. This was a wood frame shed 8'-0" x 12'-0" with corrugated aluminum roofing and siding erected on a 4 in, thick concrete slab. It was used as a guard house.