Name of railroad company that handled logging ops around Oroville, California?

As info is a bit hard to get hold of down here, could someone provide details of the main railroad operator who carried out logging operations from about the early 1930s onwards? I have been told that Northwest Pacific had a role but this was only a guess.

Swayne Lumber Company and Western Pacific ?
Do a “Google” for “Oroville, CA logging railroad”. [:D]

These three come to mind:

Cloverleaf Lumber Co.
Feather River Lumber Co.
Qunicy Lumber.

The Qunicy was the only one to survive past 1957, the Cloverleaf and feather River right of way were abandoned and now lay beneath the lake created by construction of the Oroville Dam. An aside, the same water project forced WP to construct forty seven miles of new right of way to avoid the same flood zone.

Going back further, there was the Mohawk and Sierra Valley Lumber Co. three foot guage operation, Purchased by WP so as to aquire the right of way for a line relocation, it ceased operation in twenties.

Dave