Drain

Definition and stakes

Portrait of Henry F. French Henry F. French,  Farm drainage

“ When a drain is entirely obstructed, if there is a considerable flow of water, and the ground is much descending, the water will at once press through the joints of the pipes, and show itself at the surface. By thrusting down a bar along the course of the drain, the place of the obstruction will be readily determined; for the water will, at the point of greatest pressure, burst up in the hole made by the bar, like a spring, while below the point of obstruction, [321] there will be no upward pressure of the water, and above it, the pressure will be less the farther we go. ”
Source: Gutenberg

Portrait of Henry F. French Henry F. French,  Farm drainage

“ The object is simply to draw a line parallel with the proposed bottom of the drain, for the laborers to work under, so that they, as they proceed, may measure down from it, as a guide to depth. Having with the spirit-level, ascertained the fall from end to end of the drain, a short stake is set at each end, and a line is drawn from one to the other at the requisite height, and supported by the cross-pieces, at suitable distances, to prevent the sagging of the line. ”
Source: Gutenberg

Portrait of Henry F. French Henry F. French,  Farm drainage

“ Another, whose idea is, to catch the water in his drain before it rises to the surface, as it is passing up from below or running along on the subsoil, and keep it from rising higher than the bottom of his ditch, thinks it quite as obvious that the drains should run up and down the slope, that the water, once entering, may remain in the drain, going directly down hill to the outlet. ”
Source: Gutenberg

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