SACRAMENTO AND SAN JOAQUIN RIVERS INDEX SHEET. N.p., n.d. [Circa 1920s.]. Blue line map, 97.5x70.5 cm (34 1/2 x 27 3/4 inches), with hand coloring. Map of the Sacramento River Valley and a bit of the San Joaquin, from Stockton in the south to Red Bluff in the north, with the various irrigation districts hand colored. A detailed map, scale 1 inch = 4 miles. Shows existing and proposed levees and proposed channel enlargement, extent of flood plains, "private reclamation," railroads, and other details. A very good copy. Professionally shrink wrapped on foamcore. No copies reported by OCLC. An important Central Valley map. (#166361).