http://www.nrdcactionfund.org/arcticad/heroes.asp
You can also send thank-you messages through this website. If you have
free or cheap long distance calling, i would highly encourage a call
over an email (the offices give more weight to calls). You will simply
tell the person who answers the phone that you want to thank the
congressman (the Great Lakes allies are all men) for protecting the
Arctic and request that he continue to vote against any bill that opens
the Refuge to drilling. It will take less time than composing an
email!