Well it looks like 140 is going to be closed for some time. Be sure to check out the pictures along with this article over at SF Gate.
SFgate: A 300-foot-deep rock slide has buried the main highway into Yosemite National Park, threatens two electricity towers and could block the Merced River, authorities said Thursday.
Since May 29 some 250 to 300 tons of rock and debris have cascaded down a nearly vertical slope 10 miles east of Mariposa and 12 miles from the park, covering Highway 140, according to emergency workers.
The slide, which is 600 feet long, 600 feet wide and 300 feet deep, is between two towers carrying 72,000 volts of electricity to the park and to the town of El Portal, said Mariposa County Fire Chief Blaine Shultz.
If it continues as it has for the past four days, he said, it could topple the towers and cut off power to virtually the entire region. The wall of dirt and rock is now touching the Merced River.