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Colorado Basin River Forecast Center

Hydrograph

River at a Glance

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Printable Image About this graph Tabular Data (UTC) Tabular Data (MST) Datum: Not Available Metadata

NOTE: Forecasts are not available for the Bill Williams River at Alamo Lake. Only observed stages are available for this point.

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Flood Categories (in feet) Major Flood Stage: 1265 Moderate Flood Stage: 0 Flood Stage: 1235 Action Stage: 1235 Low Stage (in feet): 0 Historic Crests (1) 46.00 ft on 02/07/1937 (2) 39.60 ft on 09/06/1939 (3) 30.80 ft on 08/29/1951 (4) 23.00 ft on 03/14/1941 (5) 22.50 ft on 03/02/1941 (P): Preliminary values subject to further review. Recent Crests (1) 30.80 ft on 08/29/1951 (2) 23.00 ft on 03/14/1941 (3) 22.50 ft on 03/02/1941 (4) 39.60 ft on 09/06/1939 (5) 46.00 ft on 02/07/1937 (P): Preliminary values subject to further review. Low Water Records Currently none available.

Zoom Level:16 Legend FEMA Layer Gauge Location Disclaimer Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Flood Impacts & Photos

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1265	Water reaches the embankment crest elevation at the top of the dam. The dam crest length is 283 feet.
1235	Water reaches the spillway crest elevation. Crest length is 284 feet.

About This Location

Latitude: 34.230854° N, Longitude: 113.608819° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 1235 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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other 982 ft 2217 ft   Current/Historical Observations: Corps of Engineers (COE) Info for Alamo Lake U.S. Geological Survey (USGS) Data and Site Info for Alamo Lake

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Colorado Basin RFC Flood Control District of Maricoipa County USGS Real-time Data - Arizona USGS Real-time Data - California Arizona Flood Warning System Salt River Project Water Resources Info CAP - Lake Pleasant USACE - Arizona / So Cal Projects USBR - Lower Colorado River Operations Inundation Mapping Locations

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Snow Information

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