The tallest building in Pittsburgh is the 64-story US Steel Tower, which rises 841 feet (256 m), was completed in 1970. One of the major ways that wood is beneficial to streams is that it provides cover for fish macro invertebrates that are hiding from predators.The unique sprawling structure is located in Port on a hillside overlooking a river-valley. The central section of the building was first opened in 1936. Mooring rings are situated along the Allegheny River as a reminder of when the space was the Allegheny Wharf.