Those Places Thursday

Can you tell me where this dam is located?

I'll give you a few hints:

1) This is located in West Virginia.

2) The Greenbrier River empties into this river.

3) The dam is located in a railway town.

4) Highways 3 and 20 converge here.

5) A large State Park is nearby.

Okay, folks, that's it. See if you can find the name of this dam, and the river it crosses!

Be sure to check back tomorrow for the answer!