WASHINGTON — The Senate, ignoring a veto threat from the White House, authorized $23 billion in water projects Monday, including work to restore the hurricane-ravaged Louisiana coast and Florida's Everglades.

The measure, passed by the House earlier this year, was approved 81-12. It now goes to President Bush, who threatened a veto after the bill's anticipated cost ballooned by $9 billion as projects were added in negotiations between the House and Senate.

Sen. Orrin Hatch, R-Utah, said the legislation provides nearly $61 million for water projects in rural Utah, with $10.8 million for water-related infrastructure needs in Duchesne, Iron and Uintah counties.

It authorizes a study on the feasibility of tapping the Spanish Valley Aquifer to meet growing water needs in Moab and the rest of Grand County.

It also authorizes a study to help reduce the flooding threat of the Santa Clara River in Washington, Iron and Kane counties, he said.

"Despite the fact that Utah is a desert, the people in its southwestern corner have always had to cope with the dangers of flooding," Hatch said. "As the area's population and economy have grown, local leaders have worked hard to keep pace with adequate flood protection projects. It's a difficult and expensive process, so I appreciate that the Senate is providing support."

The Senate vote was approved by a veto-proof margin, and the bill's supporters said they are optimistic that if the president rejects the measure, his veto will be overridden by two-thirds vote.

"He knows it's going to be overridden," said Sen. James Inhofe, R-Okla., a leading supporter of the widely popular measure that would give a green light — if money is approved — to hundreds of water projects in virtually every state.

"These programs are necessary," insisted Sen. Barbara Boxer, D-Calif., who rejected arguments by opponents that the legislation is stocked with unneeded pet projects pushed by individual lawmakers.

"This makes a substantial commitment to protecting our nation's wetlands, navigation routes and recreation opportunities. It is crucial to our country's economy," said Boxer at a news conference after the vote.

The legislation authorizes $3.6 billion for major wetlands and other coastal restoration, flood control and dredging projects for Louisiana, a state where coastal erosion and storms have resulted in the disappearance of huge areas of land.

The bill also includes nearly $2 billion for the restoration of the Florida Everglades, and nearly $2 billion for the Army Corps of Engineers to build seven new locks on the upper Mississippi and Illinois rivers.