UPDATE, 10:40 a.m.: Caltrans spreads the good news:
US101 has been reopened to normal two-way traffic. Your weekend travel plans may proceed!
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Original Post: Caltrans release:
U.S. Highway 101 is CLOSED approximately 5 miles south of Piercy in Mendocino County. A tree fell down onto power lines and both lanes of the highway are closed.
This incident is unrelated to construction or slide activity at the nearby Horseshoe Slide, which is located a little more than a mile south of the downed lines.
There is currently no estimated time to reopening.