We met at Bluebird Park at 8:30 am. We drove up to the top and walked down. Our only dipper encounter was at Bridge 3.
There we found a bird  singing just above the bridge area.  The nest box that has been used in previous seasons is once again being used this year. Inside there was a partially completed moss dome. We watched the bird sing and forage around the Bridge 3 area for a few minutes.  The nest building likely started after March 11 as the nest box was empty before that date.