A small flocculation basin has three compartments of equal dimensions with a cross$-$flow, horizontal$-$shaft, paddle wheel design. The G value for the $1$st compartment is $50$ sec$-1$ and the total detention time for the entire basin is $105$ minutes. There are two paddle wheels on a horizontal shaft in each compartment. Each wheel has two blades with a circumference of circular rotation of diameter of $4$ ft$.,$ and the blades are each $1\mathrm{.}0$ ft in width x $7$ ft in length. The flocculation basin is $20$ ft wide, $24$ ft in total length, and the depth of the basin is $8$ ft$.$