A manure spill in western Iowa’s Ida County is under investigation by the Iowa Department of Natural Resources. The D-N-R says the manure leaked from a hog confinement operation in the northwest part of the county. A manure tank overflowed, sending waste into Bitter Creek. It’s unclear how much dumped, but estimates are it was flowing at two to three gallons a minute. A berm was built to stop the flow of manure, which was transferred to another pit. Ammonia levels in the creek are elevated but no dead fish have been found.