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| 19.0 |
the Chehalis River in Thurston County will cause severe near record flooding...with deep and swift flood waters inundating the Independence Valley. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Chehalis River Basin.
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| 17.5 |
the Chehalis River in Thurston County will cause major flooding...inundating roads and farm lands in Independence Valley. Deep and swift flood waters will cover SR-12 and James...Independence and Moon Roads. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Chehalis River Basin.
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| 15.5 |
the Chehalis River in Thurston County will flood several roads in Independence Valley with swiftly moving water including SR-12 and James...Independence...Moon and Anderson Roads. Flood waters will cut off access to and from Chehalis Reservation and inundate nearby farm lands. Some residential structures may be threatened. |
| 14.0 |
the Chehalis River in Thurston County will flood several roads in Independence Valley including James Road...Independence Road and Moon road. Flood waters will also cover nearby farm lands. |
| 12.5 |
the Chehalis River in Thurston County will locally spill out of its banks into nearby fields and over a few roads. |
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Latitude: 46.776100° N,
Longitude: 123.034000° W,
Horizontal Datum:
NAD83
River Stage Reference Frame |
Gauge Height |
Flood Stage |
Uses |
| NWS stage |
0 ft |
14 ft |
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 |
123.65 ft |
137.65 ft |
Older USGS topographic maps, NGVD29 benchmarks |
| MSL |
N/A |
N/A |
Older USGS topographic maps, MSL benchmarks |
| Other |
N/A |
N/A |
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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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