A Washington County Roads Department crew had to act fast Saturday after floodwaters covered County Road 30 — the only road into the Rolling Acres subdivision — north of Fort Calhoun.

Rolling Acres has approximately 50 homes.

Washington County Board of Supervisors Chairman Steve Dethlefs said the county's Emergency Operations Committee formulated a plan to top the asphalt road with about one foot of crushed rock and line the road with reflective road markers.

Highway Superintendent Bill Hansel assembled a crew and were able to reopen the in about four hours.

“I have had contact with several of the families who live in Rolling Acres, they truly appreciate the effort of the roads department and how rapidly they tackled the project,” Dethlefs said in an email to other board members.

Roads east of Fort Calhoun remain closed. Water was still flowing over County Road 34 and in the fields east of Fort Calhoun.

DeSoto and Boyer Chute National Wildlife Refuges were closed due to the rising river levels. By Saturday, roads in DeSoto NWR were covered by water.

A mandatory evacuation for northeastern Washington County, which was issued Thursday, was lifted Saturday.

The roads in that area, including County Road P33, and county roads that run east of U.S. Highway 75, including 16, 10, 8 and P4, are now open. However, water was still over the road on P33 as of Sunday.

On Saturday, floodwater from the Missouri River was still surrounding camp sites at Cottonwood Cove Marina and River View Park Resort Marina.

Following the evacuation notice Thursday, a long stream of vehicles and campers could be seen making their way to Blair as residents tried to save their belongings and property before the Missouri River overflowed its banks.

The Missouri River reached 31.04 feet at 12:45 a.m. Monday, but has since fallen. It is expected to drop below flood stage — 26.5 feet — by Friday.

Releases from Gavins Point Dam were reduced to 43,000 cubic feet per second (cfs) Sunday evening and was expected to further reduced to 23,000 cfs by Monday evening, the U.S. Army Corps of Engineers said.

By Tuesday morning, the releases were scheduled to drop to 20,000 cfs.

The Gavins Point pool elevation is no longer in surcharge — defined as extra storage space above the normal operating pool. Releases from Fort Randal Dam, upstream from Gavins Point Dam have been reduced to 4,500 cfs. The travel time from Fort Randall Dam to Gavins Point is about 36 hours.

Gavins Point release changes take two to three days to reach Omaha.

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