Adopt Resolution #24-231 approving Change Order #3 for Halls Dover Acres Street Reconstructions, Improvement Project #24-02

Purpose:
The purpose of this case is to adopt Resolution #24-231 approving Change Order #3 for Halls Dover Acres Street Reconstructions, Improvement Project #24-02.
 
Background:
Trunk Watermain Scope:
Included in the Halls Dover Acres Street Reconstructions project is the extension of approximately 1,265 lineal feet of 12-inch trunk watermain between Potassium Street east of 157^th Lane and Sodium Way adjacent to Sunfish Lake Boulevard. This connection is included within the 10-year Capital Improvement Program and 20240 Comprehensive Plan.
 
Revised Watermain Scope:
At the July 9, 2024 City Council meeting, Council adopted Resolution #24-185 approving Change Order #2 for this project. The change order adjusted the trunk watermain route to continue the line down Sunfish Lake Boulevard, and connect at 155^th Avenue / Sodium Street. At the time of the change order, staff’s understanding was the line at 155^th Avenue and Sunfish Lake Boulevard was an 8-inch line. The change order included reducing the 12-inch trunk watermain line down to 8-inch, and making an 8-inch wet tap into the existing line. A 12-inch line between this connection and Sodium Way would need to be considered in the future.
 
During construction of the work included under Change Order #2, it was discovered the existing 12-inch line, which was thought to end at the intersection of Sodium Street and Sodium Way, remained 12-inch through the intersection of Sunfish Lake Boulevard and 155^th Avenue / Sodium Street. This was not known previously due to the incorrect Alpine Acres as-built maps, and the reduction to 8-inches occurring under the west side of Sunfish Lake Boulevard, before the first valve to the west. In reaction, Change Order #3 kept the trunk line 12-inches and connected to the existing 12-inch line at 155^th Avenue / Sodium Street, resulting in completion of the 12-inch loop, with future considerations no longer being required.
 
Construction Impacts:
Change Order #3 includes the cost for re-stocking the 8-inch wet tap and supplying the 12-inch wet tap. In today’s manufacturing environment, watermain wet taps of this size are not kept on-hand and require special ordering to obtain.

Notification is not required.

Observations:
This work has already been completed. Though Staff strives to request City Council approval of change orders before work occurs, this was not feasible during construction given the large expense that would occur if the Contractor’s crews were forced to stop work while waiting for City Council approval to occur.
 
The trunk watermain loop constructed as part of this project is complete, including passing all required testing, and is now in service.
 
Alternatives:
Alternative #1 – Motion to adopt Resolution #24-231 approving Change Order #3 for Halls Dover Acres Street Reconstructions, Improvement Project #24-02.

Payment for the work covered by Change Order #3 will be funded by Water Utility Funds.
 
Change Order No.3 increases the construction costs by $10,560.00.  However, this work will no longer need to be programmed into a future project.

Staff recommends Alternative #1

Motion to adopt Resolution #24-231 approving Change Order #3 for Halls Dover Acres Street Reconstructions, Improvement Project #24-02.