United Launch Alliance has been given an $860 million contract modification for work on the Evolved Expendable Launch Vehicle for Delta IV and Atlas V rockets.

The deal covers the EELV capability for the two kinds families of rockets.

ULA, a joint venture of Boeing and Lockheed Martin, will provide launch capability options, including mission integration, base and range support, maintenance commodities and Delta and Atlas depreciation.

They will also provide for mission assurance, program management, systems engineering, integration of the space vehicle with the launch vehicle, launch site and range operations and launch infrastructure, maintenance and sustainment.

Work will be performed in Colorado, California and Florida, and is expected to be completed by September 2017.

The Air Force's Space and Missile Systems Center is the contracting activity.