The Interior Department privately floated a plan to drill new tunnels through Glen Canyon dam along the Colorado River in a bid to enable water to flow out of the reservoir and maintain hydropower production as a 23-year-long drought pushes reservoir levels to precarious lows.
Drilling new holes in the dam was among several “alternatives” for modifying the infrastructure to deal with low-water conditions that the Bureau of Reclamation described in a non-public briefing attended by the Great Basin Water Network.