Posted today 2-23-17:
Caltrans District 9, Caltrans District 8, and Inyo County are making significant progress on Whitney Portal Road. Rock demolition operations are expected to continue through Saturday (weather permitting). However, the demolition operation cannot be performed if there is a public safety concern, so it is essential that the public stay clear of this area.
The road is currently gated just above Hogback Road on Whitney Portal Road to prevent both vehicle and foot traffic. This closure is in place for your safety.
We will keep you updated!
*Picture of this morning's blasting

Inyo County Sheriff's office posted a short video of the blast:
https://www.facebook.com/InyoCountySheriffsOffice/videos/730518917130678/