The job has been scaled down from an original price of £216m to £100m in the wake of the Government’s construction efficiency drive.
The construction timetable has also slipped from a planned spring start to the summer.
The consortium, led by Interserve together with infrastructure developer Equitix, will design, build, finance and operate the new facilities at Elland Road in Leeds and Havertop Lane at Normanton.
A new specialist operational training centre will also be built at Carr Gate in Wakefield and will include
firearms training ranges, driver and public order training facilities.
Interserve will be providing support services to this project worth £47m over the 25-year life of the concession.
Financial close and the signing of the contract are expected to take place by June 2012 and construction will commence on each of the sites then.
Adrian Ringrose, chief executive of Interserve said: “We are committed to working closely with the community to ensure the local economy benefits from our involvement over the long term.”