Union Pacific Railroad maintenance crews will start work July 7 on the company's main line in Weber Canyon between Evanston, Wyo., and Ogden, installing new ties and surfacing and relining the track.

The work, scheduled for completion July 25, is part of Union Pacific's annual track renewal program, which will cost $238 million this year. It includes the replacement of more than 600 miles of rail and 1.6 million ties.

In Weber Canyon, crews will install 29,000 ties over a 37-mile section of double main line railroad at a cost of more than $1.7 million. After the ties are in place, a second mechanized crew will replace rock ballast and level and line the track to ensure the smoothest ride possible.