Comments:
Large deposit of cobble/pebble downstream of waterfall w/ evidence of widening (MCB's). No vertical migration due to coarse boulder and bedrock underneath. The channel appears to have experienced widening in the bankfull channel due to the 2011 flood events. Lower flood benches were likely blown out during flooding, leaving a wider channel than the predicted width of 45 feet. The waterfall has an elevation change of 65 feet. The natural slope of the channel below the waterfall is ~1.0%. Entrenchment ratio (1.1) is unnaturally low due to widening of lower banks from flood event. 30% "channel enlargement" for this setting may be partially attributable to a wider than HGC average, which is typical in a confined setting with below average slope. This reach, and downstream reach M03, may naturally adjust between B-type and F-type geometry depending on the deposition and bench formation along the channel margins in between flood events, and the resulting entrenchment ratios.