Agenda - Council - 09/24/2024 - Laserfiche WebLink

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6. 20. CC Regular Session New Meeting Date: 09/24/2024 Primary Strategic Plan Initiative: Address infrastructure needs. Title: Adopt Resolution #24-277 Approving Change Order No. 4 for Improvement Project #21-08, Water Treatment Plant Trunk Watermain Improvements Purpose/Background: Purpose: The purpose of this case is to adopt Resolution #24-277 approving Change Order No. 4 for Improvement Project #21-08, Water Treatment Plant Trunk Watermain Improvements. Background: Change Order No. 4 consists of seven (7) miscellaneous items related to the project, labeled 202403-CO a - g on the Northdale summary invoices attached to the Change Order, which are summarized below as items a. through g. a. At the intersection at Center Street and Bunker Lake Boulevard, a fire hydrant was required to be relocated out of the bike trail. Total cost = $11,472.53 b. On the east side of Ramsey Boulevard at 143d Avenue, a 6-inch water service was discovered. City staff determined this water service was dead so the contractor was directed to remove the service and gate valve and to plug the stub. Total cost = $13,893.21 c. At 7060 143rd Avenue, a 6-inch sewer service conflict was discovered so City staff directed the contractor to cut the riser down to avoid a conflict with the new 20" watermain. Total cost = $7,942.55 d. At Jasper Street and 143rd Avenue, a major storm sewer conflict was discovered requiring additional watermain fittings to lower the watermain to avoid the conflict. Private fiber lines increased the time it took to re -lay the 20" watermain pipe. Total cost = $42,019.15 e. Additional watermain work was required at station 115+18 on 143rd Avenue to avoid an existing 6" sewer service. Additional curb and gutter had to be removed and replaced, and watermain had to be realigned to avoid storm sewer and a catch basin. A revised plan sheet is attached illustrating this field change. Total cost = $12,165.49 f. At North Commons Park, additional wire was needed to connect the flow meter to the cabinet due to field changes for the final cabinet location as directed by City staff. Total cost = $875.44 g. Installation of 2 temporary mailboxes. Total cost = $630.00 Time Frame/Observations/Alternatives: This is an after -the -fact change order. As always, staff strives to process change orders before work is completed. However, after -the -fact change order approvals are sometimes required to prevent project delays and even larger project cost increases resulting from contractor downtime while waiting for the next Council meeting to obtain approval before the work can be completed. This can increase project costs by thousands to tens of thousands of dollars for each day work is halted.