During the second dye study on August 5, 1999 photos were taken below the County Bridge along the Lower Bull Run River just upstream from the Bull Run Power House.  In addition an informal survey was conducted of the Lower Bull Run River from Larson's Bridge (RM 3.9) to the confluence with the Little Sandy River (RM 3.1).  All photos for the survey series go left to right and then down as you progress downstream from Larson's Bridge.
 

Lower River just upstream of the Bull Run Power House	Pool reach under the County Bridge, RM 1.5
Pools downstream of Larson's Bridge
Larson's Bridge is in the background
This last photo was taken upstream of the Littel Sandy confluence.  Approx. RM 3.2