For maximum attenuation of hydraulic energy and relief of hydrostatic uplift. Woven filterpoints (5", 8" or 10" centers when cast-in-place) between cobbles relieve

hydrostatic uplift pressure and each revetment exhibits a high coefficient of hydraulic friction.

For minimum hydraulic friction and maximum impermeability. Permeability and criteria for selection of thickness (from 3" up to 12") approximates that of high quality concrete paving.

For slopes subject to severe underscour or consolidation. Rectangular concrete blocks cast in place and linked together by reinforcing cables (if required). Cables allow the revetment to articulate with changing soil and water conditions.