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After grass is established, periodically check the channel; check it after every heavy rainfall <br />event. Immediately make repairs. <br />Check the channel outlet and all road crossings for bank stability and evidence of piping or <br />scour holes. <br />Remove all significant sediment accumulations to maintain the designed carrying capacity. <br />Keep the grass in a healthy, vigorous condition at all times, since it is the primary erosion pro- <br />tection for the channel. <br />2019 Stormwater Management Manual for Western Washington <br />Volume // - Chapter 3 - Page 334 <br />