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sediment trapping facility. <br />. Materials specifications for any permanent piped system shall be set by the local <br />government. <br />Maintenance Standards <br />Check inlet and outlet points regularly, especially after storms. <br />The inlet should be free of undercutting, and no water should be going around the point <br />of entry. If there are problems, the headwall should be reinforced with compacted earth <br />or sand bags. <br />. The outlet point should be free of erosion and installed with appropriate outlet pro- <br />tection. <br />. For permanent installations, inspect pipe periodically for vandalism and physical <br />distress such as slides and wind -throw. <br />. Normally the pipe slope is so steep that clogging is not a problem with smooth wall <br />pipe, however, debris may become lodged in the pipe. <br />2014 Stormwater Management Manual for Western Washington <br />Volume 11- Chapter 4 - Page 344 <br />