1902 Hearings before Comm. on Interoceanic Canals i. 625 in (57th Congr., 1st Sess.: Senate Doc. 253) XIX Underneath the dam there would be strata or belts of sand and gravel, water-permeable material.
2008 18 Feb. 93/2 To make weeding easy, lay a water-permeable textile over the soil first.