the info on linktv web site says this:
A story about the Embrey Dam, built in 1910 by the city of Fredericksburg, Virginia to harness the power of the Rappahannock River. The dam was breached this past February when explosives planted by the Army Corps of Engineers blew apart the dam's concrete walls.   The historic event drew a crowd of thousands from the Fredericksburg area who came to witness the spectacle and to celebrate the environmental restoration of their community's river. Earth Focus joined the onlookers, and presents this video journal of the breach of the Embrey Dam. For a history of the Embrey Dam,
and the web page with info on the dam and the project is here
http://www.virginiaplaces.org/watersheds/embreydam.html