Watershed
Arroyo Corte Madera del Presidio Creek is joined by Old Mill Creek on the right in Mill Valley. Old Mill Creek, and its Cascade Creek tributary, begin high on the east peak of Mt. Tamalpais. Cascade Creek has a small dam and reservoir which was built by noted engineer Michael M. O'Shaughnessy for The Tamalpais Land & Water Co. for water supply to Mill Valley.
Read more about this topic: Arroyo Corte Madera Del Presidio