i have built 5 acre ponds for the nrcs in oklahoma with only 40 acre watershed. i think u just need to tell them you want bigger. a lot of times they go for the most feasible pond to build in a certain area due to terrain etc. i built one today staked by the nrcs with 6 acres watershed it was about 1/4 acre. just let them know your willin to spend more for a bigger pond and keep in mind there main pond staking is for ranchers who just want a watering hole that wont go empty and not take up much of there pasture. they like them small and deep.i'm not familiar with oklahoma county's field staff but in osage county,washington county,tulsa county and the stillwater office they will go to great lengths to help you
