Memorandum

City of Lawrence

Utilities Department

TO:	David L. Corliss – City Manager Diane Stoddard – Assistant City Manager Casey Toomay – Assistant City Manager Brandon McGuire – Assistant to the City Manager
FROM:	Andy Ensz – Project Engineer
CC:	Dave Wagner – Director of Utilities Mike Lawless – Deputy Director of Utilities Philip Ciesielski – Assistant Director of Utilities Beth Krishtalka – Assistant to Director Bob Brower – Utilities Operations Superintendent
DATE:	May 6, 2015
RE:	Authorize the City Manager to execute Change Order No. 2 for Project UT1312, Bob Billings Parkway Waterline Replacement increasing the contract amount by $18,699.00.

Background/Project Description

The Bob Billings Parkway waterline replacement project, as shown on the attached map, includes the replacement of the existing 1997 12” ductile iron waterline from George Williams Way to Bobwhite Drive. The project includes the installation of approximately 2,100 linear feet of 12” PVC waterline utilizing horizontal directional drilling as the primary installation method to minimize pavement removal and replacement and disturbance of existing surface features. The project will be completed in a single phase and is planned to be completed within 120 calendar days from the date that notice to proceed is issued.

Project History

The Bob Billings Parkway waterline replacement project was evaluated as part of a preliminary design report, which established viable alternatives for alignment, project prioritization, construction cost estimates, and sequencing that will align with planned street rehabilitation work and budgeted funding. The assessment study identified the Bob Billings Parkway waterline as the initial project to be included in the 2014-2015 program. The existing 1997 12” ductile iron waterline has experienced numerous failures due to the highly corrosive soils present in this area coupled with the fact that the watermain was installed without protective measures against corrosion.

Project Details

Change Order No. 2 represents a net increase to the construction contract of $18,699.00. Change Order No. 2 includes the final adjustment of bid items to reflect the installed quantities. Change Order No. 2 also includes additional pavement between Goldleaf Place and Bobwhite Drive, which is a result of field conditions found during construction that were not known during design. Professional Engineering Consultants and Utilities Staff have reviewed the proposed Change Order No. 2 and recommend authorizing its execution.

Construction Contract Costs

Original Contract	$396,889.00
Change Order No. 1	$86,497.00
Change Order No. 2	$18,699.00
Current Contract Total	$502,085.00

Change order cost adjustments related to items that were part of the original project scope are 10.8% of the original contract amount. Change order cost adjustments related to the waterline relocation at Bob Billings Parkway and George Williams Way to accommodate improvements at the intersection associated with the Public Works project are 15.7% of the original contract amount. Change Order No. 2 is the final change order for this project.

Project Funding

The project is funded from the Department of Utilities bonded construction fund per the adopted Capital Improvement Project Scenario 5 for the 2013-2017 period.

Action

Authorize the City Manager to execute Change Order No. 2 to the existing construction contract with Westland Construction, Inc. for Project UT1312, Bob Billings Parkway Waterline Replacement increasing the contract amount by $18,699.00.