CITY COMMISSION AGENDA ITEM

Department:

Utilities

Commission Meeting Date:  12/5/2017

Staff Contact:

Leah Morris, Project Engineer

Recommendations/Options/Action Requested:

Authorize the City Manager to execute Change Order No. 1 with John Rohrer Contracting Company for the Kaw River Water Treatment Plant Basin Repairs Project UT1503 increasing the construction contract by $71,235.00 and extending the final completion date by 5 days.

Executive Summary:

The Kaw River Water Treatment Plant Basin Repairs Project UT1503 includes structural repairs on the presedimentation basin, primary settling basins, and secondary basins at the Kaw River Water Treatment Plant. Repairs to the basins include: repairing concrete spalls and delamination on basin walls and slabs, crack injection, walkway repair and replacement, and handrail repair and replacement.

Change Order No. 1 to the construction contract includes the following items of work, as directed by the Utilities Department. Items 1-3 are increases to original bid quantities based on actual conditions found during demolition. Item 4 is due to recent structural failure of an outside concrete staircase at the Kaw River Water Treatment Plant. This item is not part of the original construction contract.  Due to the contractor’s qualifications and current similar scope of work, this item will be constructed as part of the project.

Change Order No. 1
Item	Description	Cost	Time
1	Presedimentation basin topping repair work includes additional 830 square feet of topping repair.	$34,030.00	0 days
2	Secondary basins full depth column repair work includes full center column repair in the north and south secondary basins.	$12,915.00	0 days
3	Removal of floor scaling work includes surface abrasion and removal of concrete scaling in the north and south secondary basins.	$1,620.00	0 days
4	Kaw River Water Treatment Plant back stairs work includes removal and replacement of the back stairs due to the failing concrete.  This work is not scoped within the original construction project.	$22,670.00	5 days
	Total	$71,235.00	5 days

Change order cost adjustments are 6.73% of the original contract amount.

Schedule	Original	With Change Order #1
Notice to Proceed:	October 2, 2017	October 2, 2017
Phase I Completion:	December 15, 2017	December 15, 2017
Final Completion:	April 1, 2018	April 6, 2018

Staff has reviewed the proposed Change Order No. 1 and recommends authorizing its execution.

Strategic Plan Critical Success Factor

Innovative Infrastructure and Asset Management

Fiscal Impact (Amount/Source):

The fiscal impact to the City is $71,235.00 for this change order, increasing the total construction cost to $1,129,761.00.  The funding for this project is included in the Department of Utilities 2017 Amended Capital Improvement Plan for project UT1503 Kaw River Water Treatment Plant Basin Repairs.

Attachments:

None.

Reviewed By: (for CMO use only)

☐TM ☐DS ☐CT ☒BM