UPDATE (July 2):

Baltimore Environmental Police have charged two men in connection with an incident on Sunday at Prettyboy Dam.

From Baltimore City Public Works:

http://publicworks.baltimorecity.gov/PublicInformation/PressReleases/tabid/2382/articleType/ArticleView/articleId/5438/Two-Charged-After-Landing-at-Base-of-Prettyboy-Dam.aspx

Original release (June 30):

Two young men were injured yesterday -- one seriously -- after they apparently went over the Prettyboy Dam.

At about 7:15 p.m. Sunday, a BCoFD medic unit was dispatched for a report of an injured person at the Prettyboy Dam. At the top of the dam, fire crews met a witness who told them  that at least one person had just gone over the dam. Fire personnel climbed down to the bottom of the dam, a steep climb down trails and numerous steps.

At the bottom of the dam, crews found an adult male patient, visibly injured, who led him to a friend. The friend was conscious but seriously injured.

Fire personnel found damaged kayaks at the base of the dam. The Baltimore Environmental Police, responsible for enforcing watershed laws and regulations, also were dispatched and were the first on scene; their investigation of this incident continues. (Prettyboy and the other two reservoirs located in Baltimore County are owned by Baltimore City.)

The more seriously injured patient was transported by Trooper 1 to the R. Adams Cowley Shock Trauma Center. Fire personnel carried him in a Stokes basket from the bottom of the dam to the top of the dam, where the helicopter had landed. Rescuers used a rope hauling system to assist with the carry during the first and most treacherous part of the climb to the top of the dam.

The less seriously injured patient was transported by ground to the trauma center of York (Pa.) Hospital.

Between 15 and 20 pieces of equipment responded to this call, including several Carroll County units that provided mutual aid.