Agenda - Council - 04/09/2019 - Laserfiche WebLink

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$607,144.11 and authorized the Mayor and City Administrator to enter into a construction contract with Kuechle Underground. Construction began in mid -March. As work progressed, the contractor approached the intersection of Riverdale Drive and Armstrong Boulevard while installing sanitary sewer and discovered that the pay items in the plans and specifications had not been revised after utilities were realigned to account for higher ground elevations and the resulting increased fill depths over the top of the sanitary sewer. Per the plans, sanitary sewer construction was to be paid by 2 foot bury depth increments, with the greatest bury depth listed as 14 to 16 feet. During construction it was observed that 200 linear feet of sewer would be installed where the bury depth would range between 16 and 20 feet, requiring a new pay item. In addition, realigning the utilities required the removal of additional trees. This work is covered in Change Order 1. As work progressed further, an existing 27 inch storm sewer line was found to be running nearly parallel between the new trunk utilities, which was slightly different from what the plans showed. This required 150 feet of the 27 inch storm sewer to be salvaged (removed but saved) while the new utilities were installed at a lower elevation, then installed again after the trunk utilities were constructed. This work is covered in Change Order 2. Construction will be complete April 5, 2019. Testing of utilities will be completed within 30 days. Notification: No notifications are required. Observations/Alternatives: Observations: Copies of Change Orders 1 and 2 are attached with the Contractors signatures accepting the change orders, and the City Engineer's signatures recommending approval of the change orders. The work covered by these Change Orders has already been completed in order to stay on schedule. A 2 day extension is also included with Change Order 1. If plans had been modified to add pay items for 16 to 20 foot depth sanitary sewer bury, the additional tree removals, and the new 27 inch storm sewer salvage and install pay item, bid prices would have reflected these items increasing construction costs accordingly. Alternatives: Alternative # 1 — Motion to adopt Resolution 19-089 approving Change Orders 1 and 2 for Riverdale Drive Trunk Utility Improvements, Improvement Project 18-14. Funding Source: Payment for the work covered by Change Order 1 and 2 will be paid for through the sewer and water enterprise funds, similar to the rest of the work completed with this project. Recommendation: City staff recommends Alternative # 1. Action: Adopt Resolution 19-089 approving Change Orders 1 and 2 for Riverdale Drive Trunk Utility Improvements, Improvement Project 18-14. Attachments Resolution 19-089 Change Order 1