An irrigation canal is the very opposite of drainage canal. The latter is built below the surface of the soil, by excavating, and is intended to receive and carry off the surplus waters from the adjacent lands. The former is built above the surface of the soil, by erecting twin (parallel) levees *Page 703 or embankments, and is intended (reservoir-like) to supply a deficiency in the water needed for the cultivation of the adjacent lands.
Plaintiff owns and operates, in the parish of Acadia, an irrigating canal which, at a certain point, runs due north and south. Alongside of said canal, and west thereof, runs a state highway, next to which, and also to the west thereof, there is a slight depression (in extent some 30 acres), shaped like a half-bowl, or half-saucer; the ridges to the north, to the west, and to the south thereof, forming (as it were) the rim of the bowl or saucer, and the highway and canal to the east thereof giving it the shape of a half-moon. The center of the bowl or saucer lies midway between the north and south ridges, on the chord formed by the highway and canal, and subtending the arc or semicircle formed by the ridges aforesaid. From this point a small drainage canal or ditch has been dug to carry off the waters to the swamps and streams which lie to the east.
That the land drains naturally towards the point of which we have spoken is shown conclusively, as we have said. But the slope of the land is very gentle, and therefore the flow of the water is slow and widespread, thus causing no erosion and cutting no defined channel. Hence we are not dealing with a drain at all, whether natural or artificial, but with drainage — natural drainage; and with the right vel non of one possessor of an estate to interfere with the natural drainage of another estate.
The precise point here involved arose in Broussard v. Cormier,
"Where two adjoining estates have practically the same elevation, but there is a difference of a few inches whereby the natural drainage of water is over the lower estate, the proprietor of such lower estate has no right to erect levees diverting the flow of water, and mandatory injunction lies to compel him toremove such obstructions." (Italics ours.)
And a public road is an estate belonging to the public, as much as a plantation is an estate belonging to an individual, and *Page 705 requires as much and even more efficient drainage than a plantation. Hence no adjacent landowner may interfere with the natural drainage of such road.
"A proprietor of an upper estate can do nothing whereby the natural servitude of drain due by the lower estate may be rendered more burdensome, except that he may make all drainage works necessary to the proper cultivation [or other use] of his estate by cutting ditches, concentrating the flow of water, and increasing *Page 706 it beyond the slow process by which it would ultimately reach the same destination, although he cannotdivert such water from the natural flow." (Italics ours.)
