Built in the 1930s, Alpine dam is part of the Marin Municipal Water District.

This photo was taken by a Mamiya 645 Pro TL medium format film camera with a Mamiya-Sekor C 45mm 1:2.8 N lens using Kodak Ektar 100 film, the negative scanned by an Epson Perfection V600 and digitally rendered with Photoshop.