Here is a link to national master "model" contract.
http://tdu.org/files/Final_MASTER_MODEL_080326_0.pdf
Article 26 covers wages, starts on page 32.
Sections 1c (yard & dock) & 1d (local driving) cover starting, seniority, 12 month, and 24 month rates. 36 months to top rate.
These should be pretty close to whatever the local union has in their actual agreement.