If NPS and the current concessionaire, Delaware North, can not effect a quick and effective cure , you can bet that if MCA of Los Angeles still had the park contract the road landslide would have already been fixed. I am not saying MCA was a good concessionaire in its short history in Yosemite National Park, just that what NPS and the Feds now say is impossible to quickly fix/repair with a original roadway shed is just a lack of will. If you doubt that MCA in its day had the raw clout, i can prove by giving one example.
In the 1970s and 1980s ,MCA of Los Angeles was so powerful that it ran YNP in fact. What MCA wanted, MCA got. It was just that capitalist -greed-religion simple. Raft rental at Camp Curry and the raft shuttle that made large profits? MCA easily got it , with its corporate size or Congress connections.
Does Delaware North get to do raft rental and raft shuttle? No, even tho many employees say it is a mafia invested or controlled company. Should a mafia company be in a national park? As long as the President keeps waving the "patriotic" flag and shouting "Iraq" to all the American patriotic fools that can not think past "weapons of mass destruction" and "ties to Al Queda" and ignore the obvious.
Another example is that MCA in its day was allowed to be so abusively powerful that it fully exercised an exclusive bus transportation contract inside YNP to the detriment of visitors from all over the world. Bus loads would show up at the 4 park entrances, then had to phone in a request for a bus to transport its passengers from the bus yard at Yosemite Village, and wait until one arrived in an hour ,or two, or longer. Bus guests were not allowed to make reservations so that an MCA buses would be waiting at the one of 4 park gates, but rather MCA made all these mass transit ,environmentally wiser guests wait ,,,and wait,,,and wait.
That is how powerful , for the worse, a large corporation like MCA was inside our Yosemite National Park for years, with Congress and the National Park Service looking the other way. And that is how NPS has no clout or will or true grit to fix such major problems in our national parks, such as Yosemite and the two year old ,long know and ignored rockslide on Highway 140 and the Merced River.