Stream Connectivity
Stream     River     Length Drop Slope Culvert  
Name Reach Impediment Mile Passage? 1/ Impact? 1/ (ft) (in) (%) Type Comments 2/
Miller Creek Miller 1 Marina driveway 0.11           CMP  
  Miller 1 NW Marina Way 0.15           CBC baffles were placed in both (side-by side) railroad culverts to create backwater pools during passage
  Miller 1 Railroad Crossing 0.16           CBC baffles were placed in both (side-by side) railroad culverts to create backwater pools during passage
  Miller 1 HWY 30 0.19           CBC culvert under HWY 30 was removed summer 2003 - channel is dry and impassable as of 10-03
1/ If velocity barrier (based on slope > 2.0) then assume impassable year-round
If perched, but not velocity, then assume seasonally passable during winter flows (November ==> March)
If length > 100 ft, then assume impassable year-round, unless culvert is embedded with stream bottom substrate
If drop > 6.0-in, then presume barrier to juveniles (perched for part of the year).  If drop > 12.0-in then presume barrrier to adults (perched for part of year)
If slope > 2.0, then presume velocity barrier.
Data Source: ODFW 2000