Iowa Department of Natural Resources

ROCK VALLEY—The Iowa Department of Natural Resources responded to two reports of manure discharges near Rock Valley on Thursday afternoon, Sept. 12.

The first came from Remmerde Farms, which reported an overflowing manure storage structure.

The discharge reached Dry Creek, a tributary of Big Sioux River. The owner will land apply manure from the storage structure as soon as possible.

DNR staff also investigated a complaint of a manure discharge from a Meadowvale Dairy stockpile.

Located west of Rock Valley, the manure runoff is entering an unnamed stream that eventually reaches the Big Sioux River. The owner plans to land apply manure when equipment can get to the site, and then build a berm to contain future runoff.

DNR staff members collected water samples at both discharge locations and will send them for laboratory analysis. They did not see any dead fish when they checked the creeks. Stream flows are high following recent rains.

The DNR reported it will continue to monitor cleanup and consider appropriate enforcement action.