| 11.9 | the Nisqually River will cause major flooding along the upper reaches of the river from Mt Rainier National Park downstream to Alder Lake. Deep and swift flood waters will inundate roads...pasture lands...and farms. The river will likely overtop some levees. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Nisqually River Basin. | | 11.0 | the Nisqually River will flood along the upper reaches of the river from Mt Rainier National Park downstream to Alder Lake. Swift waters will flood roads...pasture lands...and farms. Erosion may damage the river banks. | | 10.0 | the Nisqually River will flood roads and pasture lands along the upper reaches of the river from Mt Rainier National Park downstream to Alder Lake. | | 8.0 | the Nisqually River will locally spill over its banks along the upper reaches of the river downstream to Alder Lake. |
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1) 13.14 ft on 11/06/2006
2) 12.82 ft on 11/13/2008
3) 12.68 ft on 01/08/2009
4) 12.18 ft on 02/08/1996
5) 11.96 ft on 12/02/1977
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1) 0.00 ft on 11/17/1987
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