Patent ID: 6848866

Claim:
A sediment control roll which comprises 1) an elongate threshold member which comprises a melt-extruded polymeric netting composed of a plurality of polymeric strands which (a) define a plurality of substantially identical apertures, each of which has an area of 0.03 to 0.16 in 2 and a minimum dimension of 0.015 to 0.4 in., and (b) have a solid surface area which is from 25 to 65% of the total area of the netting; 2) an elongate outflow member which comprises a melt-extruded polymeric netting composed of a plurality of polymeric strands which (a) define a plurality of substantially identical apertures, each of which has an area of 0.03 to 0.16 in 2 and a minimum dimension of 0.015 to 0.4 in., and (b) have a solid surface area which is from 25 to 65% of the total area of the netting; and 3) an elongate outflow filter which (i) is secured to the outflow member, and (ii) has a mesh size of 80 to 500 micron; the sediment control roll comprising a hollow, elongate sediment collection chamber which (i) lies between the threshold member and the outflow member and (ii) has an unobstructed volume which is at least 80% of the total volume of the sediment control roll.