Yellowstone National Park managers have developed a plan that would shut down the park if Congress and the White House cannot agree on a federal budget by their Monday deadline.

Park Superintendent Bob Barbee said he will close the park and lay off most employees in a weeklong process. Barbee said he thought it would be a better idea to close the entire park, rather than leave it open with inadequate law enforcement and emergency services.All national parks and other federal agencies have been ordered to draw up plans in case Congress and President Bush don't reach an agreement. But if they do, the park would remain open as usual.

All Yellowstone employees will report to work Monday even if a budget deal has not been struck in Washington, D.C., spokeswoman Marsha Karle said Thursday. The layoffs will occur over the weeklong closing process.

Park visitors would also be asked to leave.