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City of Elk River <br />Jackson Street Water Tower Condition Assessment August 3, 2015 <br />CDG Project # 15010.00 <br />OBSERVATIONS <br />22. The plates on the <br />outside of the Water <br />Tower are in <br />average to poor <br />condition, with <br />some showing <br />significant rust and <br />expansion. <br />23. Close up of one of <br />the outside steel <br />plates. It appears <br />as though water <br />has corroded the <br />backside of the <br />plate, causing the <br />steel to expand and <br />bow outward, a <br />condition known as <br />rust jacking. <br />REFERENCE PHOTO <br />1� <br />W'Y <br />14 `S COLLABORATIVE DesignGroup,inc. <br />