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Public Works reports mixed results and higher maintenance needs for curb pass-through bulb-outs pilot
Summary
Engineering staff reviewed a two-year pilot of permeable pass-through bulb-outs installed at two Albany locations; the design reduced street ponding during storms but requires more routine maintenance and construction inspection than expected.
James Cirelli, an engineer in Albany Public Works, presented an evaluation of a two-site pilot of curb-and-gutter “pass-through” bulb-outs installed under the sidewalk repair program in January 2023.
Cirelli said the design, installed at 405 Cairns and 805 San Carlos, preserves street trees while allowing drainage to continue in the gutter line through a permeable rock pad. “During a storm, the bulb-out is doing exactly what we want it to do — water is flowing through the pass-through bulb-out, in and…
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