Central Pacific Railway - State of CA Engineer Station 2382+75

From: "Manya Waggoner" manya_waggoner@dot.ca.gov

I have a document referencing engineer station 2382+75 in Merced County, CA on the Central Pacific Railway–
I am trying to locate the engineer station – do you have any historical maps showing this information? Do you have any additonal information regarding how the engineer station system works?