I wonder if there is a map somewhere showing the aquifers underground in the Western USA?

Is there a soft, easy to bore through, rock layer aquifer
that is both underneath the main channel of the Missouri River and outcrops somewhere inside the Colorado River watershed?

There are volcanic ash layers in the West that stretch over vast areas, from Yellowstone and other volcanoes.
Some ash layers contain “rare earth metals” that are needed for today’s high output DC motors.

I wonder if you could “kill two birds with one stone”
by mining a layer of rare earth ore from the Missouri to Colorado watersheds.

In the 1990s I bought pure samples of each of the Rare Earth metals from the Mountain Pass, CA mine near the NV border.
The rocks there at Mountain Pass also contain Uranium and Thorium.