The 23-year-old vanished while on a night out with friends in Suffolk, near his base at RAF Honington.
He was last seen in an area of Bury St Edmunds known as the "Horseshoe" at around 3.25am on Saturday, September 24 and CCTV shows that a waste lorry made a collection there a short time later.
The lorry, which was seized in the early stages of the inquiry for forensic examaination but did not reveal any traces of the RAF Gunner, later deposited its waste at a landfill site in Milton, Cambridgeshire.
Police are planning to search a landfill site for Corrie McKeague
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Mr McKeague went missing while on a night out with friends
This is the next logical step in the investigation
Detectives alerted site bosses of the possible need to search it early in their investigation and no further waste has been deposited there.
It is estimated it will take a team of specialist search trained police officers six to 10 weeks to search the area which covers more than 1,100 square yards (920 sq m) with waste up to 26ft (8m) deep.
The safety and welfare of the officers who will undertake the search and the noise and odour implications for local residents have all been factors that police have taken into consideration.
Search teams looking for Mr McKeague
Preparation work is already under way and a full-scale search is likely to start on Wednesday, February 22. The preparation work will include building access ways to the area to be searched and putting "appropriate facilities on the site" to allow the search to be conducted in a thorough and comprehensive way.
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Officers investigating the case say they have kept an open mind from the start as to what may have happened.
Detective Superintendent Katie Elliott said: "This is the next logical step in the investigation.
"Behind the scenes we have been working systematically through the options and we have examined a very broad range of evidence.
MISSING RAF serviceman, Corrie Mckeague Mon, January 9, 2017
Corrie Mckeague, of Dungermline, Fife, has been missing since he disappeared after a night out in Bury St Edmunds, Suffolk on September 24. The 23-year-old's girlfriend, April Oliver, 21, of Norfolk, revealed she found out she was expecting his child two weeks after he vanished near RAF Honington where he has been based for three years while training to be a gunner and a medic.
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April Oliver, 21, girlfriend of missing 23-year-old Corrie McKeague (right), who has revealed she is expecting his child
Mr McKeague's girlfriend April Oliver has revealed she is expecting his child
"This has involved an extensive examination of CCTV, phone and social media analysis, searches, media appeals, talking to those who had contact with Corrie, investigating his background and social life and tracing those who were out in Bury St Edmunds at the time of the last sighting – 3.25am on Saturday September 24."
She added: "While the search may not provide the answers as to what happened it is something we need to do as our investigation continues."
Police are liaising with Mr McKeague's relatives in Dunfermline to keep them informed about what is planned.
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