. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 22 CALIFORNIA FISH AND GAME the remainder of the year. High intensity summer and fall thunder- showers may increase discharge for short time periods, but normally have only minor effects. Climatic conditions at the site are relatively severe. Air temperatures, which can fall as low as —26C (—15F) during the winter months, and water temperatures, which can drop as low as (34F), occasionally result in anchor ice formation. Four fis
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 22 CALIFORNIA FISH AND GAME the remainder of the year. High intensity summer and fall thunder- showers may increase discharge for short time periods, but normally have only minor effects. Climatic conditions at the site are relatively severe. Air temperatures, which can fall as low as —26C (—15F) during the winter months, and water temperatures, which can drop as low as (34F), occasionally result in anchor ice formation. Four fish species inhabit Spawn Creek: cutthroat trout, Salmo clarki Richardson; rainbow trout, Salmo gairdneri Richardson; brown trout, Salmo trutta Linnaeus; and brook trout, Salvelinus fontiTuilis Mitchell. CONSTRUCTION AND INSTALLATION All wooden components of the trap in contact with water were built of redwood. The trap superstructure was constructed of 2 inch x 12 inch X 20 ft (5 cm x 30 cm x m) redwood planks laid three high for side walls and ten wide for the bottom (Figure 1). An addtional 2 inch X 12 inch, (5 cm x 30' cm) plank extending beyond the up- stream boundary of the trap and past the downstream trap box on each side was later added to the superstructure to prevent splashing over the sides during high flows. A watertight tongue and groove joint between planks was formed by routing a -^ inch ( cm) wide and 1 inch ( cm) deep groove along each long edge and gluing a ^ inch ( cm) redwood strip into the groove between planks. PLATE SUPPORTS GUTTER UPSTREAM TRAP SCREEN. DOWNSTREAM TRAP BOX FIGURE 1. Schematic diagram of trap design (metal plates, bracing rods, and tail screen deleted). A gutter was formed by a 4 inch x 6 inch x 10 ft (10 cm x 15 cm x m) beam sided by 2 inch x 6 inch x 10 ft ( cm x cm x m) boards. Metal plate supports of 2 inch x 6 inch (5 cm x 15 cm) boards, slanted ° toward the gutter and inclined 1° downstream, were
Size: 2103px × 1189px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcaliforniadeptoffishandgame, bookauthorcaliforniafish
