In all, eight workhorse C-130s stand ready to fight destructive wildfires around the country - but all are grounded due to rules governing the use of the nation's aerial firefighting resources, and the new purchases probably won't be able to help firefighters for weeks, if not months.
"Getting into large, multiple wildfire scenarios, there's just not enough [aircraft] to go around in the current state," said Chuck Bushey, past president of the International Association of Wildland Fire, a professional association of people who fight wildfires.
Obama signed the bill at the urging of Colorado's congressional delegation, which was quick to praise the move.
Three planes are supposed to be ready by mid-August: Two BAe-146s from Missoula, Mont.-based Neptune Aviation Services Inc., and one BAe-146 from Minden, Nev.-based Minden Air Corp. The BAe-146s are jet-powered.
The three will bring the Forest Service fleet to 20 large tanker planes - a figure that includes the lease of eight planes on Monday from the State of California, the Canadian Interagency Fire Centre, and a private DC-10 based in California. Another 11 tankers, including the C-130s, can be called into service.
"This is a major milestone in our efforts to modernize the large air tanker fleet," Forest Service Chief Tom Tidwell said in a release about the president's bill signing.
Still, the eight Air National Guard C-130 cargo planes fitted to drop slurry sit in Wyoming, Colorado, California and North Carolina. The Forest Service says it may request the eight planes only when all private tanker planes already are fighting fires or are unavailable for use. The C-130 crews insist they're ready to roll on 48 hours' notice.
"We have no limiting factors in terms of personnel or equipment to respond," said Deidre Forster, spokeswoman for the Wyoming National Guard.