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| 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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Latitude: 46.752800° N,
Longitude: 122.082000° W,
Horizontal Datum:
NAD83
River Stage
Reference Frame |
Gauge Height |
Flood Stage |
Uses |
| NWS flow |
N/A |
N/A |
Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps |
| Vertical Datum |
Elevation
(gauge height = 0) |
Elevation
(gauge height = flood stage) |
Elevation information source |
| NAVD88 |
N/A |
N/A |
Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps |
| NGVD 29 |
N/A |
N/A |
Older USGS topographic maps, NGVD29 benchmarks |
| MSL |
N/A |
N/A |
Older USGS topographic maps, MSL benchmarks |
| Other |
1450 ft |
1460 ft |
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Hydrologic Resources
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Additional Resources
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here. |
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NWS Information |
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weather.gov 
