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Chapter 4 - Best Management Practices for Erosion and Sediment Control <br /> 4.30 TEMPORARY SLOPE DRAIN <br /> ( ES BMP 1 .30) <br /> Definition <br /> A flexible tubing or conduit extending from the top to the bottom of a cut or fill slope . <br /> Purpose <br /> To temporarily convey concentrated stormwater runoff safely down the face of a cut or fill <br /> slope without causing erosion problems on or below the slope . <br /> Conditions Where Practice Applies <br /> .. On cut or fill slopes before permanent stormwater drainage structures are installed . <br /> Planning Considerations <br /> There is often a significant lag between the time a cut or fill slope is completed and the <br /> time a permanent drainage system can be installed . During this period , the slope is usually <br /> not stabilized and is particularly vulnerable to erosion . This situation also occurs on slope <br /> construction which is temporarily delayed before final grade is reached . Temporary slope <br /> drains can provide valuable protection of exposed slopes until permanent drainage <br /> structures can be installed . <br /> Earthen Dike <br /> Corrugated Metal ( Compacted ) <br /> i Extension Collar A <br /> Waterproof Seal r <br /> / _D D+6" <br /> / .,.,. „•24 : 1 _ <br /> A - Jill <br /> Provide Outlet o _ ! �—= 11 — II - I .liF� SII VIII �Illl_ <br /> Protection I c Standard Flared <br /> End Section <br /> I - !I 1111=JIII�If� <br /> Section <br /> s <br />.� Earthen Dike <br /> ( Compacted ) g'1 <br /> III — -- IIS— III���� II I II�II�Ic�= <br /> �I I — ll � III.'—� III� II III�IIII <br /> Section A-A <br /> Plate 4.30a Temporary Slope Drain <br /> Source: Virginia SWCC <br /> w <br /> 4-99 <br />