Page 353 - Peterson 85 Years and Going Strong
P. 353

  Top to bottom: Main Spillway with Liebherr cranes as transport system in September 2018; Pouring concrete on upper chute of main spillway at night in October 2018; Placing RCC on emergency spillway splash-pad in August 2018
December 1. “We had to re-phase how much of the spillway would be permanently construct- ed—versus temporarily—to get through the rainy season,” said Whelan. “We also had to do a lot more excavation in the deep crevasse, which would require a significant amount more of roller-com- pacted concrete (RCC) to fill the hole. And that meant a lot more crushing. All that changed how we procured our materials and the concrete we’d be batching. It changed a lot of things.” Kiewit used RCC as a temporary fix for the main spillway and a permanent solution for the emergency spillway. All of it was batched right there at the site using on-site materials.
“Roller-compacted concrete is extremely durable, just like concrete,” explains Nipar. “It’s a quick placement you can load into off-road trucks, dump,
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