Boyer Chute National Wildlife Refuge, created in 1992, is a National Wildlife Refuge (NWR) located along the banks of the Missouri River in the U.S. state of Nebraska. The 4,040-acre (1,630 ha) refuge preserves an area that had been cultivated and neglected before the early 1990s. Channelization projects along the Missouri River to improve flood control and navigation resulted in the closing off a side branch of the river, known since the early 19th century as Boyer Chute. Between 1820 and 1937 the Missouri River had migrated 3 mi (4.8 km) eastward and the area of the chute had originally been on the east bank of the river; today, the chute is west of the main channel of the Missouri. In 1937, the Army Corps of Engineers began to rechannel portions of the Missouri River, cutting off the ch