Editor's Note: Frank Kozeliski, P.E., former president of Gallup Sand & Gravel in Gallup, N.M., attended all five World of Concrete Hoover Dam Bypass Tours. Here, he recalls highlights from each.

2006: I framed a set of drawings of how the bridge was going to look and of the towers to hold the arch up as it was being constructed. I had them framed and everyone who comes to the office can refer to them. We went to the abutment on the Nevada side and walked around the hill like mountain goats. The excavations were in place for the Skewback foundations for the arch. The contractor had just started to place the cables.

2007: The cableway towers had fallen the previous year and the contractor was regrouping to find new ones. I remember taking a picture of the large cable lying on the ground. The columns were going up on the two sides, the arch foundations were placed, and the arch placement had started. Most of the project was at a standstill due to the accident.

2008: We went to the Arizona side to see the tub girders that were installed at the abutment, and we were able to touch the beams. Metal decking was being placed. They were using large cranes near the abutment since the tower cranes were not in service yet. Pier caps placed on the Nevada side but no tub girders. The arch was starting at the walls on both sides.

2009: The arch had started and we were able to take pictures from the Hoover Dam observation area. The decks were placed to the beginning of the arch, actually two spans on the Arizona side five spans on the Nevada side.

2010: I took my first helicopter ride to take pictures. The arch was done, columns and pier caps were completed, and the tub girders were being installed from the center of the arch to either sides to keep the arch symmetrical. Jeff St. John gave a great presentation on the project . The presentation was something that every one studying the bridge should see.