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In the early 1900s, the town of and snap a chalk line marking the level of the finished pour. Rebar and bulkheads. For crack control, we placed two strands of 3/8-inch rebar at the base of the wall and a single strand at the top. The top of the wall stepped down in several places, and there we formed bulkheads by scribing tapered blocks of 2x8 to fit tightly against the stone and screwing it vertically to the inside of the forms. We used the same method to fit the full-length bulkheads at the ends of the forms. Some dirt packed along the bottom edge of the forms kept the concrete from leaking out. Pouring the