I'm pretty sure its correct, but from what I have seen 16u ASA Easterns are in Salem VA, with Northerns being in Mt. Pleasant MI.
Not sure if it will work, but this is the link I found some info at:
http://www.asasoftball.com/about/getStory.asp?nid=1993
That is a good link for 2011 - it has the sites for all USA and territorial nationals listed.
USA/ASA Girls? 16-Under ?A? Fast Pitch ? Chattanooga, Tenn.
Girls? 16-Under Class A Fast Pitch Eastern - Salem, Va.
Girls? 16-Under Class A Fast Pitch Northern ? Mount Pleasant, Mich.
USA/ASA Girls? 18-Under ?A? Fast Pitch ? Normal, Ill.
Girls? 18-Under Class A Fast Pitch Eastern ? York, Penn.
Girls? 18-Under Class A Fast Pitch Northern ? Overland Park, Kan.
ASA selects their sites each November at their annual convention. They will announce their 2012 sites in 2-1/2 months.