An analysis released Wednesday of the Palmdale-to-Burbank section of the state’s high-speed rail project recommends that routes requiring tunneling beneath the San Gabriel Mountain should remain in consideration. The report examined a total of 10 alternative routes that would stretch from 35 to 45 miles. Four would run roughly parallel to the 14 Freeway, while six others would shorten the distance by burrowing under the mountain range, parts of which are in the Angeles National Forest and San Gabriel Mountains National Monument. But even the freeway routes would require extensive tunneling as they pass through the narrow freeway corridor that connects the Santa Clarita Valley to the High Desert. The report recommended dropping two freeway routes because they pass closely to Vasquez High School and the High Desert Middle School in Acton and have the most track visible to residences. However, the six routes requiring mountain tunneling were retained even though some have generated strong opposition from residents and property groups in the east Valley, including the Foothill Trails District Neighborhood Council and Shadow Hills Property Owners Association. The six tunnel alternatives would have the trains exit the mountains in one of three locations: Lakeview Terrace; just south of the Golden State (5) Freeway; or at Montague Street and San Fernando Road in Pacoima. Depending on the exact alignment, the mountain tunnel routes would displace between 16 and 93 single-family homes, up to 26 multifamily complexes, 77 to 94 commercial buildings and 65 to 107 industrial buildings, according to the report. The two retained freeway routes would displace even more total structures, including 48 to 59 single-family homes, 240 industrial buildings and 255 commercial buildings. A route tunneling beneath the mountains had not been considered in earlier reports and only gained traction last summer after Los Angeles County Supervisor Michael Antonovich suggested such a route should be studied. In October, much of the mountain range was designated as a national monument, including the area under study for high-speed rail. However, the report stated that government officials told the authority the designation would not necessarily bar a train tunnel. The Palmdale-Burbank section is just one segment of the planned 700-mile, $68 billion high-speed rail project that would connect Los Angeles and San Francisco by 2029. The latest analysis will be presented to the California High Speed Rail Authority board June 9 in Los Angeles. A groundbreaking ceremony was held in January for the first 29-mile segment between Fresno and Madera.