<p>Workers blew up a portion of the lower spillway at the Oroville Dam in California on Sunday, May 28, as part of the construction project to improve the damaged structure.</p><p>California Department of Water Resources officials said the controlled explosions should happen frequently as construction ramps up, according to a news report</a>. The spillway was shut down recently for the season, which allows for the frequent controlled explosions.</p><p>Construction to rebuild the spillway started on May 13, with most of it expected to be finished by November 1. The construction of a splash pad is planned for 2018.</p><p>Erosion at the spillway was discovered in February during heavy rainstorms. Many Oroville residents were evacuated for several days as officials worried the dam could break because of erosion.</p><br />
