RICHLAND, Wash. — Federal officials are looking to ship some 3 million gallons of radioactive waste from Washington state to New Mexico, giving the government more flexibility to deal with leaking tanks at Hanford Nuclear Reservation, officials said Wednesday.

The Department of Energy said its preferred plan would ultimately dispose of the waste in a massive repository – called the Waste Isolation Pilot Plant – near Carlsbad, N.M, where radioactive materials are buried in rooms excavated in vast salt beds nearly a half-mile underground.

The federal proposal was quickly met with criticism from a New Mexico environmental group that said the state permit allowing the government to bury waste at the plant would not allow for shipments from Hanford, the nation's most contaminated nuclear site.

Sen. Tom Udall, D-N.M., said WIPP specifically prohibits waste from Hanford and any proposal to modify permit language in this case would need "strong justification and public input."

"WIPP has demonstrated success in its handling of defense TRU waste," Udall said in a statement. "With regard to Hanford waste, I urge all parties involved to exhibit caution and scientific integrity to ensure that DOE is abiding by the law and that the waste classifications are justified."

The waste near Carlsbad includes such things as clothing, tools and other debris.

Between 2000 and 2011, the Hanford site sent the equivalent of about 25,000 drums of such so-called transuranic waste, which is radioactive but less deadly than the worst, high-level waste.

The latest proposal would target just a fraction of the transuranic waste from Hanford's underground tanks, which hold a toxic, radioactive stew of liquids, sludge and solids.

Federal officials have identified six leaking tanks at Hanford. Five of those tanks contain transuranic waste, said Tom Fletcher, assistant manager of the tank farms for the Energy Department.

Dave Huizenga, head of the Energy Department's Environmental Management program, said the transfer would not impact the safe operations of the New Mexico facility.

"This alternative, if selected for implementation in a record of decision, could enable the Department to reduce potential health and environmental risk in Washington State," said Huizenga.

Don Hancock, of the Albuquerque-based watchdog group Southwest Research and Information opposing the transfer to New Mexico, said this is not the first time DOE has proposed bringing more waste to the plant near Carlsbad.

"This is a bad, old idea that's been uniformly rejected on a bipartisan basis by politicians when it came up in the past, and it's been strongly opposed by citizen groups like mine and others," Hancock said. "It's also clear that it's illegal."

Disposal operations near Carlsbad began in March 1999. Since then, more than 85,000 cubic meters of waste have been shipped to WIPP from a dozen sites around the country.

Any additional waste from Hanford would have to be analyzed to ensure it could be stored at the site because a permit issued by the New Mexico Environment Department dictates what kinds of waste and the volumes that can be stored there.

WIPP spokeswoman Deb Gill said the facility does not anticipate any problems with its existing capacity as permitted under law.

Officials estimate that some 7,000 to 40,000 drums of waste would be trucked to New Mexico, depending on how the waste is treated and its final form.

Washington Gov. Jay Inslee says the proposal is a good start in the process of getting rid of Hanford's waste.

"I will be insistent that the full cycle of technical review and permitting is resolved so that any grouted material does not remain in the state of Washington," Inslee said.

Inslee traveled Wednesday to Hanford to learn more about the leaking waste tanks. His trip came a day after federal officials acknowledged budget cuts may disrupt efforts to empty the aging vessels.

Inslee said sending waste to New Mexico is two to four years away. He also said a system is in place to treat the groundwater should contamination from the leaks reach it.

In the meantime, Inslee plans to push Congress to fully fund this proposal, saying "every single dollar of it is justified."

South-central Washington's Hanford Nuclear Reservation is home to 177 underground tanks, which hold toxic and radioactive waste left from decades of plutonium production for the country's nuclear weapons arsenal.

The tanks hold some 56 million gallons of waste and have long surpassed their intended 20-year lifespan. The Energy Department has said the leaking tanks could be releasing as much as 1,000 gallons a year.

State and federal officials have said the leaking materials pose no immediate threat to public safety or the environment, but the leaks raise concerns about the potential for groundwater to be contaminated and, ultimately, reach the neighboring Columbia River about 5 miles away.

Inslee has said repeatedly that Washington state has a "zero tolerance" policy for leaks.

In a letter to Inslee, the Department of Energy estimated it will have to eliminate $92 million for its Office of River Protection, which oversees efforts to empty the tanks and build a plant to treat the waste. The cuts will result in furloughs or layoffs impacting about 4,800 workers in Washington, including 2,800 contract employees dealing with tank waste and construction of a plant to treat the waste, the agency said.

Inslee spokesman David Postman said the governor's initial concern is for the workers, but he emphasized budget constraints cannot be an excuse to delay response to the leaking tanks.

The U.S. government spends some $2 billion each year on cleanup at Hanford – one-third of its entire budget for nuclear cleanup nationally – so the project is still in line to receive most of its usual federal funding.

Deputy Secretary of Energy Daniel Poneman wrote in his letter layoffs and furloughs may curtail progress related to closing the tanks.

The cuts within the Energy Department's budget are the result of debate in Congress, where Republicans and President Barack Obama are fighting over how to curtail the nation's debt.

Energy Department officials said their budget was being reduced by some $1.9 billion.

___

Associated Press writers Mike Baker in Olympia and Susan Montoya Bryan in Albuquerque contributed to this report.

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  • FILE -- This photo provided by the U.S. Dept. of Energy, shows the construction of a "tank farm" to store nuclear waste in 1944 on the Hanford nuclear reservation near Richland, Wash. It is one of collection of photos documenting life in and around the reservation from 1943-1967. Six underground radioactive waste tanks at the nation's most contaminated nuclear site are leaking, Gov. Jay Inslee said Friday, Feb. 22, 2013. Inslee made the announcement after meeting with federal officials in Washington, D.C. Last week it was revealed that one of the 177 tanks at south-central Washington's Hanford Nuclear Reservation was leaking liquids. Inslee called the latest news "disturbing." (AP Photo/U.S. Department of Energy, File)

  • FILE - In this July 14, 2010 photo, workers at the Hanford nuclear reservation work around a a tank farm where highly radioactive waste is stored underground near Richland, Wash. Six underground radioactive waste tanks at the nation's most contaminated nuclear site are leaking, Gov. Jay Inslee said Friday, Feb. 22, 2013. Inslee made the announcement after meeting with federal officials in Washington, D.C. Last week it was revealed that one of the 177 tanks at south-central Washington's Hanford Nuclear Reservation was leaking liquids. Inslee called the latest news "disturbing." (AP Photo/Shannon Dininny, File)

  • FILE -- In this March 23, 2004 file photo, workers at the tank farms on the Hanford Nuclear Reservation near Richland, Wash., measure for radiation and the presence of toxic vapors. Six underground radioactive waste tanks at the nation's most contaminated nuclear site are leaking, Gov. Jay Inslee said Friday, Feb. 22, 2013. Inslee made the announcement after meeting with federal officials in Washington, D.C. Last week it was revealed that one of the 177 tanks at south-central Washington's Hanford Nuclear Reservation was leaking liquids. Inslee called the latest news "disturbing." (AP Photo/Jackie Johnston, File)

  • Sen. Ron Wyden, D-Ore., stands inside B Reactor to address the press during his tour of the Hanford Nuclear Reservation in Richland, Wash., Tuesday, Feb. 19, 2013. Wyden of Oregon, whose home state neighbors the Hanford nuclear reservation in south-central Washington, said he was troubled by news last week that a radioactive waste tank there is leaking and concerned that a long-planned plant to treat that waste is behind schedule and over budget. (AP Photo/The Oregonian, Jamie Francis)

  • Sen. Ron Wyden, D-Ore., center tours the Hanford Nuclear Reservation in Richland, Wash., Tuesday, Feb. 19, 2013. Wyden of Oregon, whose home state neighbors the Hanford nuclear reservation in south-central Washington, said he was troubled by news last week that a radioactive waste tank there is leaking and concerned that a long-planned plant to treat that waste is behind schedule and over budget. (AP Photo/The Oregonian, Jamie Francis)

  • Russ Farbre, left, gives Sen. Ron Wyden, D-Ore., a tour inside B Reactor at Hanford Nuclear Reservation in Richland, Wash., Tuesday, Feb. 19, 2013. Wyden of Oregon, whose home state neighbors the Hanford nuclear reservation in south-central Washington, said he was troubled by news last week that a radioactive waste tank there is leaking and concerned that a long-planned plant to treat that waste is behind schedule and over budget. (AP Photo/The Oregonian, Jamie Francis)

  • Sen. Ron Wyden, D-Ore., right, tours a facility to treat contaminated groundwater with Energy Department manager Matt McCormick on Tuesday, Feb. 19, 2013. The facility, located on the Hanford nuclear reservation near Richland, Wash., is a key to cleaning up the highly contaminated site. (AP Photo/Shannon Dininny)

  • Sen. Ron Wyden, D-Ore., left, and Energy Department manager Matt McCormick, center, listen as Russ Fabre recounts the construction of the B Reactor at the Hanford nuclear reservation near Richland, Wash. on Tuesday, Feb. 19, 2013. Wyden said he supports legislation to recognize the reactor as part of a national park to honor the top-secret Manhattan Project to build the atomic bomb. (AP Photo/Shannon Dininny)

  • Sen. Ron Wyden, D-Ore., left, listens on Tuesday, Feb. 19, 2013, as Russ Fabre recounts the construction and operation of the first nuclear reactor, B Reactor, at the Hanford nuclear reservation near Richland, Wash. Wyden said he supports legislation to recognize the reactor as part of a national park to honor the top-secret Manhattan Project to build the atomic bomb. (AP Photo/Shannon Dininny)

  • FILE - In this April 3, 2008 file photo, a sign warns of radiation on the Hanford nuclear reservation near Richland, Wash. In a remote pocket of the Northwest, World War II weapons production and storage built a booming economy that continued through the Cold War and into cleanup and disposal of nerve gas, plutonium and radioactive waste. Those activities are wrapping up at northeast Oregon's Umatilla Chemical Depot and southeast Washington's Hanford nuclear reservation, meaning a change for a region whose economy has long been fueled by federal dollars. (AP Photo/Ted S. Warren, File)

  • FILE - In this July 14, 2010 photo, workers at the Hanford nuclear reservation work around a a tank farm where highly radioactive waste is stored underground near Richland, Wash. Several workers at the Hanford nuclear reservation are raising concerns about the safety of the plant's design and complaining they've been retaliated against for raising those concerns , even as the U.S. Department of Energy announces another round of cost hikes and potential delays.  (AP Photo/Shannon Dininny)

  • Workers demolish a decommissioned nuclear reactor during the cleanup operations at the Western hemisphere's most contaminated nuclear site in Hanford, Washington state on March 21, 2011. It sounded like a good idea at the time. Racing to build an atomic bomb during World War II, US authorities sealed off a pristine desert and created the first-ever plutonium reactor. Sixty-eight years later, Hanford remains off limits. Not because of weapons work, which has long ago ceased, but because it is the Western hemisphere's most contaminated nuclear site with 53 million gallons (200 million liters) of radioactive waste stored in aging tanks. With billions of dollars a year invested in cleanup, there is little palpable fear among residents here in the northwestern state of Washington. Some 12,000 people work at Hanford, which at 586 square miles (1,518 square kilometers) is twice the size of Singapore. AFP PHOTO/Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)

  • FILE -- In this Feb. 19, 2013 file photo, Sen. Ron Wyden, D-Ore., right, tours a facility to treat contaminated groundwater with Energy Department manager Matt McCormick on the Hanford nuclear reservation near Richland, Wash. The facility is a key to cleaning up the highly contaminated site. Six underground radioactive waste tanks at the nation's most contaminated nuclear site are leaking, Gov. Jay Inslee said Friday, Feb. 22, 2013. Inslee made the announcement after meeting with federal officials in Washington, D.C. Last week it was revealed that one of the 177 tanks at south-central Washington's Hanford Nuclear Reservation was leaking liquids. Inslee called the latest news "disturbing." (AP Photo/Shannon Dininny, File)