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~ I. ,.. <br />i All construction should provide .for a smooth flow of water without anticip- <br />.. <br />ated flood or erosion: hazard to;adj,acen~~bv.~':s o: immediate areas upstream <br />or downstream. <br />When protection measures include dikes, or similar structures designed to <br />``~ contain storm flow, plan to allow additional height for freeboard (usually <br />`'-•';1 two (2) feet). <br />Channel clearance is an important phase of streambank erosion control. You <br />should plan to remove all debris such as trees, logs, stumps, and trash <br />drifts. <br />When your rock rip rap project is completed periodic inspections should be <br />made to determine maintenance requirements of the installation. 19mely <br />maintenance will assure continued performance and lasting benefits from <br />your streambank protection. <br />You should allow a minimum of thirty (30) days for surveys, planning, and <br />layout. <br />~} <br />~~~. <br />189 <br />