English Coulee Diversion
The devastating 1997 flood that brought national attention to the Grand Forks, North Dakota region also motivated city officials and the U.S. Army Corps of Engineers to find solutions to avert future floods of this magnitude. An initial plan to reroute the Red River itself was rejected in favor of a more cost-effective solution involving both new and modified levees, floodwalls and pump stations. The plan also included buyouts and the English Coulee Diversion channel which is designed to intercept runoff flows from the west and divert them around the city to the north. In seeking the most effective approach to the English Coulee Diversion, the Corps enlisted HDR's planning and design expertise. HDR's involvement in the project extended from conceptual design through construction.
The project utilized the Design Documentation Report (DDR) process. Although the project had a very aggressive schedule, right-of-way clearance began later than anticipated, necessitating nine plan amendments. HDR met every submittal deadline and helped maintain the project construction schedule.