Conti Federal Services has secured a contract to construct the B-21 Phase Maintenance Hangar at Ellsworth Air Force Base located in Rapid City, South Dakota, US. 

The engineering company specialises in military construction, as well as critical infrastructure. 

Awarded by the US Army Corps of Engineers (USACE) Omaha District, the contract is valued at $135.5m. 

The project comprises a new 80,000ft² two-bay hangar facility, with an associated airfield apron, site features, utilities, and infrastructure.  

These facilities are intended for the maintenance of the B-21 Raider aircraft.

Completion of the project is expected in May 2027. 

Conti Federal Services US Business Development vice-president Ryan Kanzleiter said: “This most recent award is a critical project to the B-21 mission at Ellsworth Air Force Base as it interfaces with many current and future bed-down projects. 

“We are looking forward to continuing our partnership with USACE Omaha to deliver another project safely, with sound quality and mission focus.” 

Ellsworth Air Force Base has been designated as the main operating base for the B-21 Raider. 

This development is expected to enhance the operational capabilities of the base and bolster the US Air Force's long-range strike potential.  

The contract marks the fourth infrastructure project undertaken by Conti Federal at Ellsworth Air Force Base as part of the overarching B-21 bed-down programme.  

The programme at the base is said to be crucial for strengthening national security and ensuring military readiness. 

Last year, the company was awarded a contract for the construction of a B-21 Weapon Loader Training Facility at the base.  

Additionally, Conti Federal is currently involved in building a Radio Frequency Hangar and a Fuel Systems Maintenance Dock at the site.