Stopped by Bridge 3 today. No sign of any dippers. Creek level low. Peeked under bridge and the second box where the pair were apparently were building their second nest held an incomplete moss dome. Likely no second brood, possible predation of one of the adults.
Checked Bridge 1 area and no dippers seen or heard.
Went down to Main St. and saw one adult fly up to the nest box from Bluebird Park vantage. I thought I heard young. Crossed Main and went down for a better view of the box and saw one adult leave the nest box. Did not return in the time I was there.
Definitely need some more observations from along the creek.