Cheyenne River above Angostura at Hwy 71

The past week

What floods at each level

• 3211 ft

  Major flood stage. Significant flooding along the Cheyenne River upstream from Angostura Reservoir. Water will backup along the Highway 71 road embankment, although no impacts to Highway 71 are expected. Major flooding of agricultural land.

• 3209 ft

  Moderate flood stage. Widespread flooding of agricultural land along the Cheyenne River upstream of Angostura Reservoir. The park and parking area near the Highway 71 bridge will be flooded and unusable. Water may begin to backup behind the road embankment in places.

• 3207 ft

  Minor flood stage. Minor flooding of agricultural land along the Cheyenne River upstream of Angostura Reservoir.

• 3206 ft

  Action stage. Low lying areas of the Cheyenne River upstream of Angostura may flood.

When the water runs low

• 5 ft

  Stage needed to inundate designated Gulf Sturgeon critical habitat below Jim Woodruff Lock and Dam.

• 3 ft

  Temporary (not sustainable) operating level for of Scholz Power Plant

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