An erosion control barrier for installation in a drainage path in a service environment. The erosion control barrier includes a unitary permeable sheet which is bent along a longitudinal axis to provide an upslope side, a downslope side and a longitudinally extending apex. The permeable sheet is constructed of a degradable material so that the erosion control barrier has a design service life in the service environment and a design material life in the service environment. The design material life is longer than the design service life. The permeable sheet is designed to be sufficiently transversely stiff and resilient during the design service life to enable the erosion control barrier to be self-supporting. The permeable sheet is designed to substantially disintegrate within the design material life.