The last time he saw the concrete cap on the tunnel intact was on Jan . 26
The former buildings were supported on piles, however, and the supports and concrete caps remain.
He only hinted at that prospect, though, saying that only after 2012 would there be an assessment of how the country was doing without concrete caps.
The report noted that, although the defective concrete cap had been installed by Halliburton, decisions about the installation process made by BP had been the cause of the failure.
On Friday night, heavy machinery tore out the old bridge, and on Saturday workers installed precast concrete caps on the old bridge abutments, shaped to accept the new, higher superstructure.
Below the 18-inch concrete cap rests the United States' cold war legacy to this remote corner of the Pacific Ocean: 111,000 cubic yards of radioactive debris left behind after 12 years of nuclear tests.
A city public works official said the investigators had no trouble reaching the place near the embassy where a suspicious hole, big enough for a person, was recently dug through a three-foot protective concrete cap on the utility tunnel outside the American Embassy.
A concrete cap will then laid on top.
The estate said previously that following expert advice and extensive surveying the first hole was covered with a purpose-made concrete cap in August 2010, constructed to industry best practice standards as adopted by the coal authority.
Two alternative solutions for the pier cap on one of the bridge crossings over IH-35E in the IH-635 project were analyzed in this case study, a cast-in-place post-tensioned concrete cap and an innovative prefabricated steel concrete composite cap.
The influence of vertical loads on the lateral response of group piles installed in sandy soil and connected together by a concrete cap is studied through finite elements analyses.
