Detroit Dam and Lake (Detroit, Oregon)

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In 2021, the U.S. Army Corps of Engineers determined that this dam was at risk of failing in a large earthquake in the Cascadia subduction zone, which would result in a "potentially catastrophic flood", which could potentially affect Oregon's state capital, Salem, located downstream. For this reason, the level of the reservoir was lowered by five feet, to reduce the stress on the concrete structure. Capacity: Drainage area: 437 mi² (1,132 km²) Maximum inflow: 63,200 ft³/s (1,790 m³/s) 1909 Lake Elevation Maximum pool: 1,574 ft (480 m) Full pool: 1,569 ft (478 m) Minimum flood control pool: 1,450 ft (442 m) Usable storage (1,425.0 to 1,563.5 ft) = 321,000 acre-feet (396,000,000 m3) Powerhouse Number of units: 2 Nameplate capacity: 100 MW Overload capacity: 115 MW Hydraulic capacity: 5,340 ft³/s (151 m³/s)