"He had surgery and is doing pretty well," he said. "He took between 100-120 pellets in about a 4-inch (10-centimeter) circle to his calf."
Harris was listed in good condition Tuesday, officials at University Hospitals in Iowa City said.
Harris was hunting with a group when he went to get a bird the group had shot. Harris put his gun on the ground and as he was crossing a fence, his hunting dog stepped on the gun, Foster said.
The gun was about 3 feet (0.91 meter) away from his leg.
"The muzzle velocity is so great that the pellets don't have a chance to spread out," he said.
No one else was hurt, and the dog was not injured.
Foster said no citations have been issued.
Russia has been developing an energy module on the basis of the megawatt-class nuclear power plant since 2010. The spaceship needs neither sunlight nor solar batteries