Among the many bridges at the big Air Force Academy project in Colorado Springs, Colorado, are two that break a couple of American construction records. The record-breakers are a pair of prestressed concrete railroad bridges that will carry the Santa Fe line over the north and the south highway approaches to the Academy. The only other prestressed railroad bridge in this country is a modest 19 feet long; the two new ones have spans of 70 feet. In addition, since the Academy bridges were designed for E-72 loading- heaviest in the books- they also set the record in that department. Some pouring practices used on this project are of interest. The tremie, fitted with a rubber nozzle, is passed up and down the length of the forms in pouring concrete for the beams. This has been found superior in several respects to the more common practice of pouring concrete at one end of the form until it heaps to the top and then moving down a bit and repeating the process. The latter method often results in segregation, honey-combing, and excessive bleeding. Deck pouring has been speeded by the use of a novel concrete conveyor. The pour starts at the far end of the deck. A second rail at the end away from the loading area is positioned while the first is in use. When the pour is completed along the first rail, the buggies are switched to the second, closer rail. Then the first is knocked down and set up closer to the loading area. This is continued until the deck has been completely poured.