Tools and equipment used to build the Transcontinental Railroad

From: "Michelle Davis" mdavis927@verizon.net

Where can I find pictures and information on what kinds of tools and equipment were used and how they were used to build the Transcontinental Railroad?

Were there any tools invented and used to help build the Transcontinental Railroad? Who were the inventors of the tools?

Thank you for any assistance you can give me to point me in the right direction.