Patent ID: 7449105

Claim:
A water filtration and erosion control system comprising: a) at least one filter bag positioned on a surface to control the flow of water thereacross; said bag comprising: i) an elongated, tubular filter bag having a wall constructed from a fabric, said fabric performing filtration of surface water passing therethrough said fabric being woven from polypropylene or polyethylene and having weight in the range from about 3 oz/yd to 16 oz/yd and a sieve size in the range from No. 10 to No. 100; ii) ballast being disposed within said filter bag to filter water passing through the bag, said ballast substantially filling said bag to provide sufficient weight to restrain the filter bag's movement when placed on a sloping surface across which water may flow, said filter bag being capable of at least partially damming such water flow before said water passes through said filter bag, said ballast comprising a material selected from the group consisting of chopped rubber, shredded rubber, and ground rubber, and combinations thereof and said ballast including an effective amount of water soluble anionic polyacrylamide flocculant for erosion control; iii) said fabric including a UV inhibitor; and, iv) said filter bags being portable.