Looks like the SP alignment might be coming back. .
Excerpt:
Officials announced last week California's approval of a $750,000 grant for planning efforts to connect the Altamont Corridor Express (ACE) and Bay Area Rapid Transit (BART) rail systems.
Officials say the connection would relieve congestion on the I-580 corridor. The funding was secured by the recently established Tri-Valley – San Joaquin Valley Regional Rail Authority, Alameda County Supervisor Scott Haggerty and Tracy Mayor Pro Tem Veronica Vargas announced.
Railway Track & Structures