 To accommodate additional facilities and housing , the Navy needed to upgrade the island 's infrastructure . Its sewage system was upgraded with the 2001 installation of a 6 @,@ 000 @-@ foot ( 1 @,@ 800 m ) , 20 @-@ inch ( 510 mm ) sewage main from the island to Pearl Harbor and improvements to the sewage @-@ pumping station . Due to the bridge 's unique design , which includes a floating section , it was impossible to use it to transit cable across the loch . In 2005 , the Navy contracted drilling for primary and auxiliary conduits 20 feet ( 6 @.@ 1 m ) apart and parallel to the bridge from Halawa Landing to the Ford Island golf course . The contractor installed 5 @,@ 045 @-@ foot ( 1 @,@ 538 m ) -long , 24 @-@ inch ( 610 mm ) -thick carbon @-@ steel high @-@ magnetic casing conduits , and fiber @-@ optic communications cables and 46kV power lines were fed through them . 
