Barry Witt's report in today's Merc covers San Jose's efforts to get PG&E to study moving a substation located on the Diridon South site. The substation could either be reconfigured or moved. A potential site is the fire training center on the other side of Park Avenue.
The substation is wedged between the old Stephens Meat plant (which closed down last month) and the Union Pacific/Amtrak/Caltrain tracks, towards the northern end of the trapezoid-shaped lot. I have been told that substation, which is roughly the shape of a square that juts into adjacent properties, could be reconfigured to run parallel to the tracks. If that's the case, it would be the most cost-efficient option since it may be possible to move without rerouting the high-tension transmission lines that run above the property.
One more property acquisition may be required for the ballpark to work properly. A small parking lot just north of the substation is used as long term parking for Amtrak riders. If the ballpark were to have a southeast orientation, there might not be enough space put in a proper field without this space. That is, unless the designers want yet another bandbox.
Update (10/26, 10:44): Another article which quotes Santa Clara County Assessor Larry Stone is on the CBS-5/KPIX website.