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Casper Creek Townhouses 88-4555 <br />2/04/93 CRO <br />Revised 7/15/93 <br />BIOFILTRATION SWALE DESIGN <br />Determine the high water level In the creek at the swale d(scharge Iocation. <br />A survey crew visited the site and determined: <br />1) the elevation of the current water surface etevation in the creek and <br />2) the elevation of what appeared to be the high water mark on the <br />creek bank <br />A phone conversation with Jane Zimmerman at the City of Everett revealed that the <br />apparent high �vater mark surveyed by the crews was caused by a beaver dam <br />blocking the creek and was not typical of the actual high water elevation in tho <br />creek. It was decided by Ray Miller (Group Four, Inc.) and Jane Zimmerman that <br />an elevation approximatety one foot lower than this elevation (527.40') would be <br />used as the swale outlet elevation. The swale & plans were revised to reilect this <br />change. <br />' <br />