Comments:
Bridge that is floodprone constriction in this segment is a wooden foodbridge with wooden footers. We did not conduct a full bridge and culvert survey on this structure since it is not a permanent structure, but it is acting as a floodprone constriction although there were no noted problems associated with it. Downstream end of segment (where parking lot runs along LB) is more entrenched. Parking area may have been filled in and river may have had old channels or floodchutes on LB terrace and where parking area is located. The lower end of this segment is more of a transitional area from riffle pool to step pool bedform. There is one large mass failure on the RB, also construction activities upstream of segment may be contributing fines to Big Spruce. One large bedrock grade control (waterfall) at upstream end of reach (just DS of confluence with Little Spruce) not a constriction. Segment is in late stage III... we did not observe a well developed bench (as was seen in upstream reach) and there were some areas of minor erosion and a large mass failure. Although bankfull width was much wider than phase 1 width, w/d ratio was low and widening score was rated in good. May just be that high altitude mountain streams are not as easily defined by regional curve? Phase 2 channel width was used to determine phase 2 confinement type because of the uncertainty associated with reference channel width.