The <a href="https://en.wikipedia.org/wiki/Refugio_oil_spill" id="mwAVA" rel="mw:WikiLink" title="Refugio oil spill">Refugio oil spill</a> deposited 142,800 U.S. gallons (3,400 barrels) of <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Crude_oil" id="mwAVE" rel="mw:WikiLink" title="Crude oil">crude oil</a> onto an area in <a href="https://en.wikipedia.org/wiki/California" id="mwAVI" rel="mw:WikiLink" title="California">California</a> considered one of the most biologically diverse coastlines of the <a href="https://en.wikipedia.org/wiki/West_Coast_of_the_United_States" id="mwAVM" rel="mw:WikiLink" title="West Coast of the United States">west coast</a>.