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Water-Year Summary for Site USGS 11058500
Maximum discharge, 6,000 ft³/s, Dec. 25, 2003, gage height, 11.49 ft, from floodmark left by debris flow, on basis of critical-depth measurement of peak flow; no flow for a portion of the day at times in 1929, 1931-35, and May 31, 2002 (during fire suppression activities). The peak discharge for the flood of Dec. 25, 2003, is based on hydraulic computations that were applied to a possible debris or hyperconcentrated flow. It is also likely that the peak stage of 11.49 ft was left by a debris or hyperconcentrated flow event at the gage, which is not associated with the site of the critical-depth survey, 400 ft downstream of the gage. The peak of Dec. 25, 2003, was the result of an intense rain storm less than two months after a wildfire burned over 90 percent of the drainage basin.
Maximum discharge, 6,000 ft³/s, December 25, 2003, gage height, 11.49 ft, on basis of critical depth; minimum daily discharge, 0.10 ft³/s, August 23, 1929.