Actually, Dogwood Run enters the Breeches from the south side about 3/4 mile below Cold Springs. The "little run" that enters the creek from the north side right above CSI is an old mill race. A spring does enter it too, just above where it joins the Breeches. You can follow the mill race up right along the road, underneath the old mill (imagine) to where it diverges from the Breeches just above the old bridge (closed) on Locust Point road.