Western Union line men erecting the Hoover Dam line along the right-of-way of the branch railroad of Union Pacific Railroad, ca.1900

At center, a group of five men help to push a utility pole upright from its base, while a sixth at right uses a pole to push the top. Farther left, a seventh supervises.

An automobile can be seen near railroad tracks in the background.; Photoprint reads "Wherever a railroad is built there must be a means of communication for train dsipatchers. Here is a crew of Western Union line men putting the Hoover Dam line in shape along the right-of-way of the branch RR of the Union Pacific. This line will run into Boulder City with the RR with branches to Hoover Dam site.