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City of Elk River <br /> Jackson CDG Street Water Tower <br /> 10.00 Condition Assessment <br /> Project #150 July 1,2015 <br /> OBSERVATIONS REFERENCE PHOTO <br /> 22. The plates on the <br /> outside of the Water <br /> Tower are in <br /> average to poor <br /> condition,with vl <br /> some showing <br /> significant rust and <br /> expansion. <br /> /11 <br /> i <br /> 23. Close up of one of <br /> the outside steel <br /> plates. It appears <br /> as though water <br /> has corroded the 4. <br /> backside of the ' �, <br /> plate,causing the ; 1:_ <br /> steel to expand and <br /> bow outward, a <br /> condition known as f,' <br /> rust jacking. ' ' t <br /> 14 COLLABORATIVE I)esignGroup,;n,. <br />