The first two come together and flow east.
The the second and stronger two flow south for 500 yards between tow high hills and then connect with the first two.
Piping them separately would be impossible but I thought about damming them where they all come together. The problem there is that I'm losing head. I think I can get about 15 feet from the proposed dam site.
The flow from the dam would be about 30 GPM.
If I dam these and back water up say 4 feet deep, will it give me enough head?