The Missouri Dept. of Transportation tentatively has set September 15 as the target date to restore access between I-470 and I-435 in southern Kansas City, following an existing fill-supported ramp collapse on July 17. Photo: Missouri Dept. Of Transportation Groundwater is one of several possible causes being evaluated by investigators into Kansas City ramp failure, which occurred on July 17. Pyramid Contractors, Olathe, Kan., was awarded the contract to build a 225-ft-long, four-lane replacement structure currently being designed by HNTB, MoDOT’s engineering consultant. Expected to cost about $4.46 million, the precast structure will be built atop two bents with drilled
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.