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7D, Sanitary Sewer Repair - Venus Avenue Easement
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7D, Sanitary Sewer Repair - Venus Avenue Easement
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10/24/2024 10:03:58 AM
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5/7/2010 4:07:19 PM
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Venus Avenue Easement
General - Type
Sanitary Sewer Repair
Date
5/10/2010
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�;.� EN HILLS <br />MEMORANDUM <br />DATE: May 10, 2010 <br />TO: Honorable Mayor and City Council Members <br />Patrick Klaers, City Administrator <br />FROM: Kristine Giga, Civil Engineer <br />SUBJECT: Sanitary Sewer Repair- Venus Avenue Easement <br />Back�round/Discussion <br />Staff has identified a sanitary sewer repair that is needed on the main that is located <br />parallel to the Elmer L. Andersen Trail Connection south of Venus Avenue. The existing <br />sewer main is located under a grove of large cottonwood trees. The roots from these <br />trees are suspected to be the cause of the offset j oints in the pipe. The pipe is an 8-inch <br />diameter clay pipe, with offsets of 3-4 inches. During routine televising, Public Works <br />crews encountered difficulties getting the camera through the offset j oints in the pipe. <br />There is a segment of main line approximately 60 feet in length that has not been <br />televised, since the camera cannot get past the offset joints. Staff recommends that this <br />segment be repaired, along with the south 40 feet of the pipe which were televised; this <br />segment of pipe is cracked, and there is evidence of root intrusion. Attached is a figure <br />showing the location of the needed repair. <br />Since this area is currently under construction, it is the appropriate time to make these <br />repairs. However, the existing sewer main lies under a grove of nine large (24 inch <br />diameter and greater) cottonwoods that were able to be saved as a part of the trail <br />construction. <br />Staff has requested quotes from three contractors to complete this work; the contractor <br />constructing the trail, American Liberty Construction, Inc., and two utility contractors, <br />Frattalone, Inc. and Burschville Construction. Quotes are to be submitted by Tuesday <br />afternoon. Two alternatives were provided to the contractors. One alternative is to <br />replace the main line in its current location. This alternative will require the removal of <br />the large cottonwood trees. The second alternative is to construct a new sewer line <br />around the large trees by constructing two new manholes. The main line would have a <br />j og, which is less desirable from a maintenance perspective, but would minimize tree <br />removal. Some smaller trees and undergrowth would need to be removed, but the large <br />cottonwoods would be saved. <br />City Council Meeting <br />\�1Vletro-inet.us\ardenhills�PR&PW\Engineering\Council_Actions\2010\5-10- l OMemo_VenusSewerRepair.doc <br />Page 1 of 2 <br />
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