TMC user @Blup85 found the location of the supercharger in Williams, CA:
Granzella's includes an inn, restaurant, and a gift shop in this area. This will be an extremely welcome addition to I-5, relieving congestion at Colusa and shortening the gaps between Colusa and points south.
I spoke with a building official at the City of Williams, and they have approved building plans for a supercharger to be installed at Granzellas (I think everyone familiar with the area knew that was where it would go) The City is just waiting on the contractor to pull the permit for construction.
Granzella's includes an inn, restaurant, and a gift shop in this area. This will be an extremely welcome addition to I-5, relieving congestion at Colusa and shortening the gaps between Colusa and points south.