BayRail Alliance

According to the Centerville Depot website,

"It was actually a "paper" subsidiary of the Southern Pacific, the
Central California Railway, that provided a "railroad corporate name"
for the construction of the Dumbarton Bridge and the 16 miles of rail
line between Redwood Junction on the San Francisco Peninsula - through
Newark and Centerville - to Niles Junction. The Southern Pacific
incorporated the Central California Railway Company in October of 1904
to construct the new line. Upon the completion of construction in
1909, the Southern Pacific initially leased and then folded the
Central California Railway into the Central Pacific Railway in
February of 1912. By then, even the Central Pacific had long been a
railroad on paper only - existing under the giant umbrella of Southern
Pacific.

Although the Central California Railway was a "paper" railway in that
it never owned a locomotive or car, nor was the name on any ticket or
timetable, the Central California Railway's existence represents one
example of the "accounting and legal entities" that Southern Pacific's
owners and lawyers set up "to build a railroad". In effect,
these "paper" railroads simply kept a new railroad line off the
parent's operating accounts until it was finished and ready to be
turned over to the operating department. Like many other "paper"
railroads established by Southern Pacific to extend its rail lines,
the memory of the Central California Railway is preserved through the
state of California's historical archives of companies incorporated in
California."