Recent torrential rains have reignited concerns about the longevity of the Watmaugh Bridge in Sonoma. Sonoma County has planned to replace the 94-year-old steel-truss bridge since 2003, when water was found to have seeped through the concrete and rusted the rebar along the bottom of the bridge. Chunks of concrete have already fallen off and into the creek bed below. Construction of a replacement bridge is expected to start next year.