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Memorandum <br />-E1 41116 .SSO(IflTtS <br />TO: Little Canada Mayor and City Council Members <br />FROM: Lee Elfering, City Engineer <br />DATE: June 6, 2007 <br />RE: 2007 Street & Utility Reconstruction <br />Change Order #1 <br />Background <br />Based on the staking of the storm sewer in the field it has been determined that an <br />existing air release manhole structure along Canabury Drive will be in conflict with the <br />new storm sewer serving the street. Based on conversations with City staff it appears <br />that the air release valve has never been used. The age of the valve is apparent from its <br />current condition and it is quite possible that the valve would not function in its current <br />condition. <br />Summary and Recommendations <br />Due to the condition of the air release valve, its non -use, and the conflict with the new <br />storm sewer, we are recommending that the air release valve be removed and the <br />manhole surrounding the valve be removed to the extent necessary to allow installation <br />of the storm sewer. A hole from the removal of the air release valve would be plugged <br />with a cap and any remaining structure would be drilled to allow drainage through the <br />structure. The cost for this work is $1,100.00 and the associated Change Order is <br />attached. <br />If you have any questions or would like to discuss this issue please feel free to call me at <br />(763) 780 -0450 ext. 13. <br />Z: \PROJ \120083E - 2007 Street Reconstruction \0071 \Change Orders \Memo - 060607 -CC (CO 1).doc <br />10062 Flanders Court NE — Blaine, MN 55449 — (763) 780 -0450 fax (763) 780 -0452 <br />- 1 - <br />