And it is to North Korea's advantage to dismantle very quickly.
Pompeo has already visited Pyongyang twice since April to meet with Kim - the first time when he was still director of the Central Intelligence Agency - and there are discussions about a possible third trip to North Korea late next week but such a visit has not yet been confirmed. At a recent rally, he also said he had "great success" with Pyongyang.
According to the State Department, senior US diplomat Sung Kim, who held negotiations with North Korean officials before the Singapore summit, also travelled to a Korean border village on Sunday to restart talks with the North.
The new intelligence, described by four officials who have seen it or received briefings, is based on material gathered in the weeks since the summit. The official was not authorized to comment publicly on the matter and requested anonymity.
Some North Korea experts, however, have questioned Pyongyang's willingness to make good on Trump's nuclear goals.
A senior United States intelligence official also said last week that Pyongyang was continuing to "deceive us on the number of facilities, the number of weapons, the number of missiles".
"There will be specific asks and there will be a specific timeline when we do present the North Koreans with our concept of what implementation of the summit agreement looks like", the official said.
Experts say Pompeo's visit to Pyongyang would serve as a barometer for future negotiations over North Korea's nuclear weapons programs. That site is estimated to have produced fissile material for as many as a couple of dozen warheads.
A USA official told The Associated Press that the Post's report was accurate and that the assessment reflected the consistent view across US government agencies for the past several weeks.
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"I've been reflecting very carefully on what I remember from that incident nearly 20 years ago", he told reporters. In that story he was also quoted as saying "I would not have been so forward" had he known she was a reporter.
"It would be physically possible to dismantle the bulk of North Korea's programs within a year", said Thomas Countryman, the State Department's top arms control officer under President Barack Obama.
"There's no evidence that they are decreasing stockpiles, or that they have stopped their production", NBC quoted one United States official as saying. The Post is withholding details at the request of intelligence officials.
Trump defended his decision to suspend "war games" with close ally South Korea - a significant concession to North Korea, which so far has suspended nuclear and missile tests and destroyed tunnels at its nuclear test site but not taken further concrete steps to denuclearize. "I think it would be inappropriate and, frankly, counterproductive to achieving the end state that we're hoping to achieve".
Pompeo will leave Washington on Thursday for Pyongyang at the start of a round-the-world diplomatic mission that will bring him to Brussels and a key North Atlantic Treaty Organisation summit, officials said.
Mr. Trump insisted the talks are moving "very quickly" and that he believed North Korea is serious about total denuclearization.
However, one official pointed out that, despite the assessment, the talks between the US and North Korea were positive and Kim's decision to destroy a major missile-testing site and suspend nuclear and missile tests were a step forward.
Bolton's remarks contradicted those of Pompeo, the point man on the talks and who had earlier said that the USA wants North Korea to take "major" nuclear disarmament steps within the next two years - before the end of Trump's first term in January 2021.
The report stated that North Korea has "at least one undeclared facility to enrich nuclear fuel" besides Yongbyon, the main nuclear location.