1976 Marin Soils Map # 3 & 4 , covering west marin & petaluma

Measures 22 x 27" 2 Sided printing , One side -Point Reyes Nat. seashore sea , other side Petaluma creek and downtown.

Drainage, flow and tides are indicated in this series of technical maps , they were used relating to development and flooding within the county. Produced by the Dept of the Interior for such purposes . From an SF based engineering firm archive , now divested .