With winter rains on their way, officials worry a dam that creates a small lake 17 miles west of Redding could collapse, inundating downstream homes with up to 20 feet of water if sediment and debris clogging two outlet pipes is not cleared.

Two 30-inch outlet pipes at Misselbeck Dam have been clogged with silt and debris since last summer, forcing water from Rainbow Lake to flow over the top of a deteriorated 100-year-old spillway, said Charles Tucker, president of the Igo-Ono Community Services District, which owns the dam.