Bridge Spanned 13 Active Railroad Tracks in Wyoming Residential Neighborhood As infrastructure all over the United States continues to age and deteriorate, literally crumbling away, general contractors are increasingly seeing the value and advantages of using diamond tools to help restore or safely demolish these structures without damaging surrounding structures and keeping those around the area safe. The Clark Street Bridge in Laramie, Wyoming was being removed due to a revised roadway alignment that would shift the bridge half a mile away. The existing bridge was crumbling and there were concerns that in taking it down, debris could fall onto the active Union Pacific railroad tracks, so it was vital that all precautions be taken to control the demolition. General Contractor S&S Builders had many options for taking the bridge down; explosive demolition, jackhammering/breaking in place and fully dropping the bridge were all options. Since the 13 railroad tracks running under the bridge needed to remain in operation throughout the project, none of those methods were considered viable. Additionally, the bridge was located near a residential area, so the noise, vibration and risk of flying debris eliminated any kind of uncontrolled demolition as an option. It was determined that concrete cutting to assist in the selective structural demolition of the bridge was the best option. S&S Builders contracted CSDA member Diamond Drilling & Sawing Company (DDSC) of Denver, Colorado to demolish the Clark Street Bridge using concrete sawing and pulverization methods. One of the most important aspects of this job was ensuring open and effective communication between the demolition contractor and the railroad representative, as cutting and other demolition tasks had to be coordinated with the railroad to ensure no trains passing underneath the bridge on any of the 13 operating tracks were in danger of being struck by falling debris. Because of the level of existing deterioration, another concern was debris spontaneously falling from the bridge as demolition progressed, endangering not only the demolition contractor, but also any other construction personnel in the area and trains passing underneath the bridge. The contractor removed any crumbling concrete when possible prior to the demolition to prevent slips, trips, falls and flying loose debris, especially from the sidewalk that ran the length of the bridge. Any questionable areas were taped off to prevent personnel and equipment from entering the area of...