A trapezoidal channel that has a 15 foot bottom width,
Manning’s roughness coefficient of 0.033, bed slope of 0.0021
ft/ft, symmetrical side slopes of 4H:1V (s = 4), and conveys 250
cfs. It is dammed up to a depth of 4 feet. How far back upstream
will it take for the M1 curve to reach normal depth?
a. 1,430 ft.
b. 1,894 ft.
c. 2,302 ft.
d. 2,934 ft.
e. 3,486 ft.