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<br /> <br />~ <br />~ <br /> <br />A few requirements are common to al I types of <br />streambank protection. The toe of any kind of bank <br />protection must extend below the channel to a depth which <br />wi I I ensure that scouring wil I not undercut the toe of the <br />practice. The upstream and downstream ends of the bank <br />protection must be stable. This can be accompl ished by <br />tying the ends of the practice into stable reaches of the <br />streambank. Generally, streambank protection extends to the <br />top of the bank. However, it is usually acceptable to <br />extend it only up the bank to one foot above the high water <br />elevation. This elevation must be determined by a detai led <br />hydrologic and hydraul ic analysis of the stream. <br /> <br />. <br /> <br />40 <br />