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Gavins Point Dam is a 1.9-mile-long (3 km) embankment rolled-earth and chalk-fill dam which spans the Missouri River and impounds Lewis and Clark Lake.The dam joins Cedar County, Nebraska with Yankton County, South Dakota a distance of 811.1 river miles (1,305 km) upstream of St. Louis, Missouri, where the river joins the Mississippi River.
Lewis and Clark Lake is a 31,400 acre (130 km 2) reservoir located on the border of the U.S. states of Nebraska and South Dakota on the Missouri River.The lake is approximately 25 miles (40 km) in length with over 90 miles (140 km) of shoreline and a maximum water depth of 45 feet (14 m). [2]
The continued threat of rain and higher-than-normal reservoir releases into the Missouri River will hamper the draining of floodwaters in fields and plans to repair more than 100 levee breaks ...
Gavins Point Dam: NE SD: Lewis and Clark Lake: 74 23 492,000 0.607 132 Tributary dams. All tributary dams with a storage capacity greater than 250,000 acre-feet (0.31 ...
High flows out of Gavins Point was a contributor to the flooding that breached two levees near the three-way meeting point of Iowa, Missouri and Nebraska on Monday. One was a reported 300-foot ...
By July 9, the available storage increased to 3.1 percent. Officials said they planned to begin decreasing the water flowing to the Gavins Point Dam but noted that the water going into Gavins Point would fill it in 1.5 days if the reservoir were empty. [77]
Today the Bluff forms the right or south abutment of the Gavins Point Dam. [1] The U.S. Army Corps of Engineers maintains the Lewis and Clark Visitor Center and the Gavins Point Project Administration Offices on Calumet Bluff overlooking the dam. [2] [3]
As the floodwaters from the Niobrara reached the Missouri River, the U.S. Army Corps of Engineers boosted releases at Gavins Point Dam to 90,000 cubic feet per second (2,500 m 3 /s), the highest level since 2011 and the second highest on record. [10]