Originally Posted By: NickD90
I don't know what is right or wrong in this debate, BUT don't dredgers look for exposed bedrock and not free stone cobble (locations of redds)?
Seems like they would be in a different part of the river. How does small operation dredging affect the down stream turbidity? It probably would be less impactful than a decent size slide correct? Just asking questions here...you know...for science.


The exposed bedrock is ideal for gold. The next target is in the boulder fields to test behind the obstructions in the low pressure areas. The downstream edge of gravel bars along the inside bend is also a good place to look. The gravelly bottom in the slower sections is the least likely place to fins gold and most likely place for a spawning bed.

Turbidity - I was dredging on Peshastin creek last summer. There was a small slide upstream on a tributary about 3 weeks earlier. The water was very turbid and visibility was about 18 inches. This persisted for over 8 miles downstream and you could still see the stain after it dumped into the Wenatachee river. Turbidity from a dredge (if present at all) has been show to settle out completely within 30-100 yards. The sediments a dredge might stir up are not laden with mud because they come from the stream, not the hillside.