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.
1 Check yourself as you go. 2  For instance, if the trench for the French drain is to be 100â long and the grade 1%, then by the time your trench is 50' long, it should be 6 deeper than where you began excavating. 3  You'll be digging a horizontal trench across the length of the slope. Locate the best area for a French drain. 2  Find an area along the slope on your side of the boundary where excavation would be easiest (i.e., free of obstructions). 3  Trench lines should be plotted out before you begin digging French drains.