This letter from the Transportation Construction Coalition urges support for the Water Resources Development Act of 2013 (WRDA bill). It summarizes that the WRDA bill will help modernize and restore the nation's aging navigational systems, locks, dams, and flood protections. It will also help facilitate completion of existing Army Corps of Engineer projects. The letter emphasizes the economic benefits of investments in water infrastructure, noting it carried over $180 billion in freight in 2010 and that flood control projects have prevented over $700 billion in damages. It urges the Senator to pass the WRDA bill as an important bipartisan step.