it. Before it can be repaired, there is almost no protection to prevent a vehicle from falling into Aliso Canyon. Additionally, if a vehicle heading west on Sesnon becomes lost, there is no barrier to prevent it from falling into this deep canyon." Despite the proponents' argument about the severity of the situation, the bridge was never built. There is still evidence of the bridge seen from Sesnon heading east towards the canyon, the road (which is now closed off behind multiple guard rails) is visible heading towards the canyon just short of the bridge, and the counterpart is still visible on the west-bound side. Aliso Canyon oil well fire A company of Texas oil well firefighters, headed by the legendary Paul “Red” Adair, came to Oat Mountain and stopped a 1968 blaze after six days. Gas blowout On October 23, 2015, Southern California Gas Company workers discovered a leak in one of the over 110 wells at the Aliso Canyon natural gas storage facility, about one mile north of homes in Porter Ranch. The gas blowout began spewing 110,000 pounds of methane per hour. The blowout involved gas stored under pressure in an underground reservoir; the stored gas included mercaptan (tert-Butylthiol), an odorant added to the odorless natural gas to produce a "rotten egg" smell for safety. The California Air Resources Board estimated that the leak increased California's methane gas emissions by 25%. By order of the Los Angeles County Dept of Health, the company relocated thousands of families from the Porter Ranch area; the Federal Aviation Administration established a temporary flight restriction over the leak site until March 2016. On December 15, the county of Los Angeles declared a state of emergency, and two days later it approved a plan to close two schools in the area. Officials estimated that the leak would take months to repair. On January 11, 2016 Mitchell Englander, the LA City Councilman representing Porter Ranch, said "Most people weren't aware that one of the largest gas storage facilities in the United States was in their backyard. There was, from what we're hearing, no disclosure when they bought their homes." On February 18, 2016, state officials announced that the leak was permanently plugged. On March 12, 2016, Los Angeles County Public Health Department officials say its test of dust in Porter Ranch homes turned up the presence of metals, including barium, that could have