Stream Channel Adjustments Following Logging Road Removal in Redwood National Park (Classic Reprint)

Excerpt from Stream Channel Adjustments Following Logging Road Removal in Redwood National Park

When roads are constructed across streams, a large amount of fill material (soil) is bulldozed into the stream channel to build the road bed up to grade. A major part of the ongoing watershed restoration program includes the removal of this road fill material from skid trail and haul road stream crossings (figure Excavation of road fill from stream crossings is given high priority because of the relatively high potential for significant erosional damage. For example, during extreme runoff events, plugged culverts may divert streamflow and cause gullying of hillslopes and road beds while saturated stream crossings can fail as destructive debris torrents.

Figure 1. Location map of lower Redwood Creek showing Redwood National Park lands in the lower one-third of the basin.

Figure 2. Logging road stream crossing before (a) and after (b) excavation. Excavation has uncovered cobbles and boulders that composed the original stream bed.

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