Iowa has about 5,000 more pig confinements and cattle lots across the state than originally believed, a report to the federal government last month shows. That's nearly 50 percent more animal feeding operations than the state initially inventoried."It's clearly too easy for confinements to slip under the radar," said Jess Mazour, an organizer at Iowa Citizens for Community Improvement. "This is an industry that's gone unchecked."The Iowa Department of Natural Resources discovered the facilities through satellite imagery, used to complete a comprehensive survey. Of the 5,063 facilities discovered through satellite imagery, the state says nearly 1,300 of the newly discovered facilities could require some level of state oversight. And the state estimates that about half — or 630 facilities — will require on-site inspections, said Ken Hessenius, Iowa DNR's Spencer office supervisor. Still, it's unlikely the operators of the newly discovered facilities violated state law, said Hessenius, who helped compile the state's report to the EPA.Iowa DNR beieves most of the facilities are too small to require government oversight, under state law. "If you build a 1,000-head hog facility ... you don’t need a state manure management plan. You don’t need a construction design statement or permit," Hessenius said.