New Oroville Dam Spillway Has Cracks, Officials Not Worried Cody Drabble Friday, December 1, 2017 | Sacramento, CA Listen / download audio Update RequiredTo play audio, update browser or Flash plugin. Crews set up concrete pours in a checkerboard pattern at Lake Oroville. Workers must wait four days for concrete to cure before pouring adjacent concrete. Millions of cubic feet of concrete will be poured before the project is completed.Bob Moffitt / Capital Public Radio The new Oroville Dam spillway has hairline cracks, but state and federal officials aren't worried about it. The second largest reservoir in California completed phase 1 construction on Nov. 1, after a crack in February required 188,000 downstream residents to be evacuated during emergency repairs. Sacramento Bee reporter Dale Kasler has been covering the Oroville Spillway emergency and repairs for months, and he joins guest host Rick Kushman with an update on the status of the repairs.