Chris, let's do some math. If there's a 220 acre watershed in N.E. Texas and you get 45 inches a year and at least 65% is runoff (which is probably pretty close), then you will receive about 30 inches of runoff yearly. 30 inches x 220 acres = 6,600 acre inches/12 inches/acre foot = 550 acre feet per year. For a 15 acre lake, you better have a tall dam and wide spillway. That watershed suits a 30 acre lake much better...and it will still flush more than once a year. A bottom water release pipe is a must as is a lot of freeboard and major spillway planning.
By the way...are studying or playing on the dadgum computer? Hit the books, boy.
Teach a man to grow fish... He can teach to catch fish...
