about the super volcano under Yellowstone National Park why don't they (can they) just drill a small hole?

Question

so as to release the pressure may be then build a natural power station on top

so as to release the pressure, may be then build a natural power station on top

Answer 1

There are already many, many holes into the volcano. That is what the geysers are all about.

The Magma build up is huge, and no "small hole" is going to relieve that pressure. Environmentalists are completely against building the power stations in Yellowstone National Park. However, there are already power stations in many of the surrounding towns, and the pressure they "relieve" is minimal.

You don't seem to have a basic understanding of the tremendous amount of power that is working under the earth.
I have provided an excellent link to more information.

Answer 2

As said above, the pressure is inside the magma/lava. Gasses are absorbed in the lava, and the viscosity of the magma/lava will decide what will happen when the magma rises. Runny magma will form large lava flows, like from the Hawaian shield volcanos. The real danger is the sticky; high-viscosity magma like in the Yellowstone supervulcano. That will give rise to sudden eroptions and pyroclastic flows. Think Pompei, but a few magnitudes bigger.

Answer 3

From what I have heard that the pressure isn't just the volcano itself but that the pressure is pretty much the lava all of that building up and such so the pressure is in the lava.

It wouldn't do any good to try and let steam out because that isn't where the pressure is at.