Theo...Actually the inflow into the valley (the proposed pond area.) is mainly an overflow of water from a slightly higher elevation.
For example, there is an area with free standing water and this water drains under a road through a pipe, and then looks like a really small stream that winds towards the proposed area. I would guess that there are not tons of fish in that type of drain water...We're just getting out of winter here so I'm sure with all of the snowfall they get that water is still draining.