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Cape Girardeau MO view upstream June 97 Total rock lining for urban storm canal with usual flat side, flat bottom, flat side. Note low slope angle, see manhole for sanitary sewer. Note plants starting along and below high flow level. Charlotte NC view upstream Feb.98 Total rock lining for small tributary with bed form becoming more curved as sides begin to slump. See lost rocks gathering in bed, note sediment bench with grass along view right.