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22.0 |
(6.7 METERS)...MAJOR LOWLAND FLOODING OCCURS ABOVE DRYDEN TO LAKE AMISTAD. BELOW FOSTER RANCH...THE RIVER IS ONE THIRD MILE WIDE AND COVERS THE RIGHT FLOOD PLAIN TO THE CANYON WALL. CAMPERS...AUTOS...GEAR AND LIVESTOCK FLOOD ANYWHERE IN THE RIO GRANDE CANYON BOTTOM AND WILL WASH DOWNSTREAM. CANOEING AND KAYAKING ARE EXTREMELY DANGEROUS IN THE RIO GRANDE RIVER ABOVE DRYDEN TO LAKE AMISTAD. TURBULENT FLOW...HUGE EDDIES AND WHIRLPOOLS OCCUR |
18.0 |
(5.5 METERS)...THE FLOW IS WELL INTO THE FLOOD PLAIN AND THREATENS CAMPERS...GEAR AND AUTOS BELOW DRYDEN TO AMISTAD RESERVOIR. THE FLOW IS VERY TURBULENT WITH EDDIES AND WHIRLPOOLS DANGEROUS TO SWIMMERS...CANOEISTS AND KAYAKERS FROM ABOVE FOSTER RANCH TO LAKE AMISTAD |
15.0 |
(4.6 METERS)...MODERATE LOWLAND FLOODING INTO THE RIGHT FLOOD PLAIN FLOODS CAMPSITES BELOW DRYDEN TO AMISTAD RESERVOIR-TURBULENCE IS VERY DANGEROUS FOR SWIMMERS...TUBERS AND CANOEISTS-LIVESTOCK ARE TRAPPED IN LOW AREAS OF THE CHANNEL AND BANKS AND POTENTIALLY CAN DROWN |
14.0 |
(4.3 METERS)...MINOR LOWLAND FLOODING INTO LOW AREAS OF THE FLOOD PLAIN CAUSES NO SIGNIFICANT DAMAGE |
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Latitude: 29.780556° N,
Longitude: 101.758333° 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 |
N/A |
N/A |
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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