I have a stock pond that gets water from ditch, its stays full all year. I used drainage pipe to make a bridge over the ditch. the stock pond is withing 50 yards of the bridge. Was too cheap and bought 20' lenghts and cut them in half. Erosion caused bridge to get narrower, so bought couplings to extend culverts. Used tractor with front end loader to make ditch deeper and wider so could add lenghts to culverts. It was dry when doing work, but rain made water flow down ditch again making a water hole. Some of the nastiest looking water in the area excavated, low and behold could not believe the deer tracks in the new hole. So much for stock watering pond.