Scope and Content "SPLA&SLRR, Los Angeles division, map showing shoo-fly line, San Gabriel River bridge, Seaside, Cal," positive photostat, 1":50' (1907)"Map of mouth of Old San Gabriel River, Nov 96," negative photostat, 1":300' (undated)"Exhibit A locations Sept 1891," print on linen(?) (undated)"Map of mouth of San Gabriel River, Nov 96," print on linen(?), 1":200' (undated)"Exhibit C location of dam and dyke, Nov. 1896," print on linen(?) (undated)...