The American Council of Engineering Companies of New York has announced that the Randall’s Island Microtunnel Crossing project has been honored with a 2022 ACEC New York Platinum Award in Category I: Special Projects. The award submittal also earned the 2022 ACEC New York Best Panel Award.
With the goal of bringing reliable water and natural gas services to Randall’s Island, New York, McMillen Jacobs provided resident engineering and inspection services as prime consultant to the New York City Department of Design and Construction to extend water and gas services under the Bronx Kill between the Bronx and Randall’s Island. The project presented challenges due to the dense urban area setting and use of trenchless technology.
The scope involved two 920-foot-long, 60-inch-diameter permalok steel casing pipes driven by a microtunnel boring machine (MTBM) between four secant pile shafts, 58 to 64 feet deep and 14 to 20 feet in diameter. A 20-inch-diameter ductile iron pipe water main and a 12-inch-diameter HDPE high pressure gas main were installed in the casing pipes. Additional water service scope entailed 1,200 feet of near-surface water main including three valve chambers with the trunk main tie-in to Bruckner Boulevard (a major Bronx thoroughfare). The more than 2 miles of gas line installations included the 12-inch HDPE high pressure gas main and service valves by open-cut and sliplining method—a “Best Management Practices” endeavor to reduce emissions from the many agencies housed on Randall’s Island, and tie-in points near each.
The project encountered over 200 utility interferences, requiring a robust utility investigation program and city and private utility shutdowns, offsets, replacements, and relocations. Finally, site restorations included roadway repair and resurfacing, sidewalks, soccer fields, bike paths, and plantings.
The project will be honored at the 56th Annual Engineering Excellence Awards Gala, which will take place at the Hilton Midtown in New York City on April 9, 2022. In addition to celebrating among peers, the Engineering Excellence Awards program helps to publicize the many significant contributions consulting engineers make to the built environment throughout the world. The Best Panel Award is intended to promote communication of engineering excellence through the creation of panels that are visually exciting and representative of key design principles. A full list of winning projects is available on the ACEC New York website.