ae JOHNSTON ATOLL F&sSNO. SUPPORT TITLE 0305X Conduits Under Runway JTF BoD SCIENTIFIC STATION NO. STRUCTURE FACILITY NO. USER None None FOO FUNDING ($000) CONST TOTAL Prior Cost 104.5 104.5 PRE-GO Prior Cost 11.6 11.6 116.1 116.1 AGENCY AEC DPWO Letter ENGR PROC FURN PRE-GO ! Order 3551 , TOTAL COMPLETED mo RO oO f DESCRIPTION The following conduits (completed in 1964) are routed under the runway at coordinate E 197,300 at the runway centerline: Four 4~inch diameter conduits for electrical power cables. Four 4~inch diameter conduits for communication cables. One 10-inch diameter freshwater conduit. One 16-inch diameter saltwater conduit. Three 24-inch diameter conduits tor signal cable. Two 36-inch diameter conduits as spares for future utility requirements. All conduits are approximately 300 feet long, installed in one trench 26 feet wide and backfilled with concrete. The top of each conduit is at least one foot below the surface of the runway. Two reinforced concrete manholes are provided on each side of the runway. The electrical power conduits terminate in one set of manholcs and the communication and signal cable conduits terminate in the other. DRAWINGS: 91-079-Cl and C2 3-29 VOL I