New functioning U.S. based chia pool running now.

https://www.ttdpool.com

This is the first functioning US based chia pool that I know of.
This pool does not require you create new plots. It allows you to use your already created solo plots.
This pool will never threaten the 51% attack because all users are still running their own node.
You can switch between pool mining and solo mining by simply closing the client.
You will be paid for your contribution on each winning block you are running the client on.
Feel free to use the contact page to ask any questions or to report problems.