Run of bank

Run-of-bank is unscreened, as-excavated stone or gravel taken straight from a quarry face or pit bank without sorting, the same material called quarry-run or pit-run. Its wide gradation, from fines to large cobbles, packs and compacts well, so it serves as bulk fill, the core of a rubble-mound breakwater, or reclamation behind a quay wall, where strength and low cost matter more than a controlled size. It is not used as primary armor, which needs a narrow heavy gradation. The fines content sets its permeability and must be checked where the core has to drain or filter against the underlayer.