GroGreen WATT EXCL 1210 12" x 10' Excel Sediment Control Log - This Excel Sediment Control Log is composed of a 100% machine produced high altitude rocky mountain aspen excelsior confined by a synthetic net to form a log of a specific diameter. The excelsior matrix consists of curled, machine produced fibers with greater than eighty percent longer than six inches. Excel Logs are designed to reduce hydraulic energy and filter sediment laden flow in channels and on slopes. The logs are flexible to conform to the soil surface and are secured by staking.