How was this work done?
Pilings were driven into the streambed using a pneumatic hammer, powered by a large air compressor. The pilings were placed across the stream to form the structure into which red osier dogwood cuttings were woven. The resulting "Beaver Dam Analogues" (BDAs) function similar to beaver dams. The BDAs slow the flows, which causes sediment from the water to deposit on the streambed, as shown in the slideshow below. The goal in depositing sediment is to build up the incised streambed, and for the slower, higher, spring runoff to increase the amount of flooding that occurs on inset floodplains within the incised channel. OHA also installed large woody debris in the stream for habitat enhancement, as shown below.
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