08-13-08 Council Agenda - Laserfiche WebLink

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~~~~~ihc ~..ossoci.ar~s Memorandum iGll! HORIA TO: Little Canada Mayor and City Council Members FROM: Lee Elfering, City Engineer DATE: August 8, 2008 RE: SW Trunk Watermain Improvements Change Order #1 Backaround The attached change order addresses four changes to the construction of the above reference project. Allfourare outlined and explained below: As part of the Viking Drive project some of the ditch boulevard areas were filled for easier access to the sanitary sewer manholes for cleaning. Just east of the railroad bridge an area was filled that required an extension be added to an old hydrant for its continued use. During the installation of the new watermain this hydrant lead was exposed and in conflict with the new watermain. Because of the excess depth of the hydrant we directed the contractor to remove the entire hydrant and install a new hydrant at normal depth to minimize future impacts and costs if work on the hydrant was necessary. The second change modified the connection to the existing 12" watermain on the east side of the railroad tracks just north of Viking Drive. Upon review of field valve locations after excavation it was determined that the installation of a standard tee connection would require water service to be shut off to alt properties south of TH 36. Due to the business impacts it was determined that a wet tap connection should be made to allow this line to remain in operation. The savings of the tee connection and associated fittings are not accounted for in the change order. The valve locations as determined in the field also resulted in the addition of a 12" valve for additional isolation ability in the future. The final item addressed in this change order is to compensate the Contractor for the extra time required to locate the existing watermain on Stephanie Court. The watermain location on the asbuilt drawing was 10 feet west of the sanitary sewer and the location eventually found was approximately 20 feet east of the sanitary sewer. Summary and Recommendations Due to the conditions in the field and the requested changes additional compensation should be provided to the Contractor. We have reviewed the time and material costs submitted for this extra work and would recommend approval of Change Order #1 in the amount of $11,992.42. If you have any questions or would like to discuss this issue please feel free to call me at (763) 780-0450 ext. 13. 2:\PROJtl20702G- SW Trunk Watermain\OD7TChange Orders\Memo~0II0D08-CC (CO 1).tloc 10062 Flanders Court NE -Blaine, MN 55A49 - (763) 780-0450 fax (763) 780-0452