South Yuba ?
The Yuba around Norden just about dries up by late summer and I'm sure everything below there does too. We used to live at Serene Lakes in Soda Springs and had to cross the SF Yuba almost daily to go anywhere. Right at the dam there is some deep water (3'-4') along with a few holes as it heads downstream toward Lake Spaulding but for the most part it becomes too warm as it dries seasonally. Above the dam in that big meadow there are small brookies in the finger creeks that feed the reservoir. In years past that reservoir was much larger and deeper. I talked with Norm Saylor once and he spoke about water-skiing there.
It's normal for ponds and small lakes to eventually fill in with sediment and become shallower eventually turning into marshes and then into meadows as they dry.
Below Lake Spaulding it's a different story because of the controlled flows from the lake. Off Hwy.20, which parallels the lake there is also the Bear River which has a better population of planters.
There are lots of places to explore in that area but the Truckee would be my first choice if I was going that direction.
Feather River Fly
Yuba City, CA.