Intense runoff from spring snow and rain overtopped a new dam at the Colorado River bypass project at Windy Gap Reservoir in Grand County, causing damage that can’t be fully assessed until waters recede this summer.  Contractors had not finished placing riprap on the south side of the dam’s berm, though the work had been completed on the north side, according to Northern Water, the project manager. Runoff in the Colorado River leading up to Windy Gap nearly tripled over three days in early May, to 2,200 cubic feet per second, said Northern Water spokesperson Jeff Stahla. … The damage will increase the cost of the multimillion-dollar project, but should not delay its “substantial completion” in 2024, Northern Water said. It’s not yet clear, Stahla said, whether partners will have to put more money into construction as a result of the flooding.