Badwater Basin, part of Death Valley, is 282 feet (86 m) below sea level at its lowest point.
The "Exciting" drilling company, based in Nevada (they are exciting and not at all like their b**ing competitors even though they too bore), dug an underground canal connecting the Pacific to Death valley. Boom, instant saltwater lake, complete with tides.
They also installed turbines in the canal, and now are the #1 suppliers of clean energy in the mid-west. But this is not a question about energy generation. I posted it in a separate entry.
We have water covering the hottest dump in all of the Mojave Desert.
We can safely assume the water will evaporate, because the Mojave is hot. But how will this gigantic saltwater lake affect climate in the Mojave? Will it make rainfall in Las Vegas commonplace? Will it be a complete catastrophe? Revitalize the desert? Cause mass extinction of desert wildlife?