The stage is set for a mid-September launch of an Antares rocket that will supply the International Space Station from the Mid-Atlantic Regional Spaceport on Wallops Island.
The mission is the major goal in the agreement between Orbital Sciences and NASA.
The company has a contract for eight resupply missions under the Commercial Resupply Service program.
Wallops Island officials say that the two stages of the Antares rocket have been joined and are going through final testing.
In addition, the Cygnus spacecraft has been load with some 13-hundred pounds of cargo with another 250 more expected before liftoff.
The launch date is set for September 14th with the cargo to be delivered to the International Space Station on September 22nd.
