Census information for Amherst (Buffalo County, State of Nebraska). Contains: population counts from the 2010 Census and estimated counts up to 2016, Population Rings and much more.
Please try again later. This is the end point of a 70ft french drain constructed with 6in Multi-Flow product encased in coarse sand. The water is flowing into a 4inch PVC pipe via a tee connection. There is already some flow in the 4inch PVC from the upstream downspout lines that run under the french drain line. 1  Film & Animation.
A French drain is a drainage system that makes use of a trench, slightly sloped downwards, about one (1) inch for every eight (8) feet, away from an area that is usually saturated with subsurface water. It makes use of a shallow trench, about two and a half (2.5) feet deep and one and a half (1.5) inches wide.