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Williams River

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Record: 17    Segment ID: M19-    Stream Name: Williams River

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Stream Channel  
2.1 Bankfull Width 48 ft.
2.2 Maximum Depth 2.6 ft.
2.3 Mean Depth 1.7 ft.
2.4 Floodprone Width 77 ft.
2.5 Recently Abandoned Floodplain 5.1 ft.
  Human Elevated Floodplain ft.
2.6 Width/Depth Ratio 27.9
2.7 Entrenchment Ratio 1.6
2.8 Incision Ratio - Redently Abandoned Floodplain 2.0
  Incision Ratio - Human Elevated FloodPlain 0.0
2.9 Sinuosity Low
2.10 Type of Riffles Sedimented
2.11 Riffle/Step Spacing Distance 200 ft.
2.12 Substrate Composition  
  Bedrock 3.0 %
  Boulder 15.0 %
  Cobble 39.0 %
  Course Gravel 26.0 %
  Fine Gravel 11.0 %
  Sand 6.0 %
  Silt and smaller 0.0 %
  Clay Present? No
  Percent Detritus 4.0 %
  Large Woody Debris Count 8
2.13 Average Largest Particle On  
  Bed 550 mm
  Bar 250 mm
2.14 Phase 2 Stream Type  
  Stream Type B
  Bed Material Cobble
  Subclass Slope c
  Dominant Bed Form Riffle-Pool
  SubDominant Bed Form
  Field Measured Slope
  Phase 1 Stream Type  
  Stream Type C
  Dominant Bed Material Cobble
  Subclass Slope None
  Bed Form Riffle-Pool
  Sub-reach Stream Type  
  Reference Stream Type
  Reference Bed Material
  Reference Subclass Slope
  Reference Bedform
  Were Channel Dimensions Significantly Changed By Major Flooding Yes
  Were channel dimensions significantly changed by human alteration associated with flood recovery efforts (e.g., reshaping of banks by yellow machines)? No
  Channel Enlargement 11 %
  Comments By reference this segment would be C-type in a narrow valley, however encroachment from Smokeshire has caused a departure to Bc in a semi confined valley.