Always Loved a Good Puzzle

Currently we are building a water feature downtown, a long water trough that will have a bubbler and two weirs. It's hard to explain so anyone interested please return for the update photos. Yesterday's take: a view of our form, the long piece to the left, as it takes shape; a close-up of the circular area where the bubbler will sit; a sliver off a 2x4, even concrete wants exact.