Industry costs may top $14 million as 1,800 barges and 120 tow boats may be idled.
DEFENSE - ALL ARTICLES
A total of 19 employees have now been placed on paid leave in connection with investigation into missing data.
Methods of gathering and analyzing information have fundamentally changed since 9/11, they argue.
The federal government spent about $320 million on FOIA-related activities in 2003.
Pentagon officials have lobbied for the lowest figure possible.
Debate on 9/11 commission's recommendations for overhauling the intelligence apparatus overshadows other parts of its report.
TSA officials claimed the information was exempt from disclosure rules laid out in the Freedom of Information Act.
The department has catalogued 33,000 critical infrastructure sites across the country.
At Senate hearing, managers of U.S. intelligence agencies urge caution in making reforms.