. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. ii 111. o(,i( ai. STl in ok (i \i:i;ii I. l;l\ u; ;,.-, A total of 864,937 cubic yards of material was excavated, making the river bed deeper by an average of four to five feet. Figures 3 and 4 show portions of the river thai were not excavated. MATERIALS AND METHODS Lower San Gabriel River was sampled May 2, 1952, and July 15, l!;>4, from a small skiff furnished by the California Department of Fish and Game. The temper
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. ii 111. o(,i( ai. STl in ok (i \i:i;ii I. l;l\ u; ;,.-, A total of 864,937 cubic yards of material was excavated, making the river bed deeper by an average of four to five feet. Figures 3 and 4 show portions of the river thai were not excavated. MATERIALS AND METHODS Lower San Gabriel River was sampled May 2, 1952, and July 15, l!;>4, from a small skiff furnished by the California Department of Fish and Game. The temperature, dissolved oxygen, chlorinity, and pi I of the water were measured. A sample of the substrate was taken for pll and preserved for the animals it contained. Measurements and analyses of these data were carried out as described for Alamitos Bay (Reish ami Winter, 1954). Stations 11 to 14, located on a tributary of San Gabriel River, were not sampled July 15, 1954, since this ana was no longer accessible by boat (Figure 1). Additional trips were made to collect the high tide horizon animals (July 2, 1952) and meas- ure the pH and temperature of the water and substrate from shore (October 3, 1952, and November 20, 1952). SOURCES OF WASTE DISCHARGES INTO LOWER SAN GABRIEL RIVER The primary sources of waste discharge into Lower San Gabriel River during the 1952-54 period were: Dow Chemical Company (Fig- ure 1, C; Figure 4), Santa Fe Springs Waste Disposal Company (Figure 1. E). two domestic sewage disposal plants (Figure 1, B and. FIGURE 4. Lower San Gabriel River from the Pacific Coast Highway (Alt. 101) bridge, looking southwest towards Station 6. Dow Chemical Company located in left center. The large smoke stack is a portion of the Los Angeles Bureau of Water and Power Steam Plant. The Pacific Elec- tric Railroad bridge crosses the river downstream from the Dow Chemical Company. Photograph by the author, July 7, Please note that these images are extracted from scanne
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