ae JOHNSTON ATOLL SCIENTIFIC F&SNO. TITLE 01017 Payload Storage Igloos USER STRUCTURE ‘FACILITY NO. SANDIA SCIENTIFIC STATION NO. 722 and 723 BOD None FoD FUNDING AGENCY AEC ($000) ENGR PROC CONST TOTAL PRE-GO Prior Cost 5.8 7.8 29.4 43.0 TOTAL 5.8 7.8 29.4 43,0 FURN COMPLETED DESCRIPTION The Payload Storage igloos (completed in 1966) aretwo 8-gage corrugated steel arches. Each igloo is erected ona reinforced concrete slab with thickened footings. Inside dimensions are 11 x 23 x 10-ft. high at the crown of the arch. The igloos are spaced ]6-ft. apart and covered with coral to a depth of approximately 3-ft. at the crown. A 10-ft. wide by 9-ft. high steel blast door is provided at one end of each of the igloos for access. A 1-tft. thick reinforced concrete portal wall supports the doors and also retains the coral fill. The opposite end of the igloos is closed off by a 1-ft. thick reinforced concrete wall. A 30-ft. x 68-ft. x 6-in. thick concrete slab is located on the north side of the igloos and in front of the blast doors. Exterior and interior lighting is provided. has also been installed. A security protective alarm system Besides being covered with coral, a 12-ft. high coral berm. approximately 100ft. long, has been constructed 35-ft. north of the igloos. The igloos will be enclosed, after GO, by an 8-ft. total height security fence. (See F&S No. 01015.) DRAWINGS: VOLI 91-723-S1 and S2 91-723-E1 91-723-W1 91-+-724-Cl 91-724-E] 1-20