We do have a lot of beaver along the whole river, I haven't ever seen a beaver dam of lodge but they must be somewhere.
John
Bank beavers. We had a lot around Fallon NV when I was a kid. One lady trapper that was a friend of my folks took one just over 65 pounds one winter in the mid 1980's.
Along the Carson river they did not make lodges, but dug tunnels like rats. The only sign was fallen cotton woods or other leafy trees. Over a decade of fishing along this river and we never saw one or saw a lodge. Just lots of fresh cuts on the trees in several spots.
It is probably dependant on the soil type. Along the Carson the soil is all lake bottom hard silts and clays with thin sand layers. It makes for fairly safe tunnel digging.