Memorandum
City of Lawrence
Utilities Department
|
TO: |
David L. Corliss – City Manager Cynthia Wagner - Assistant City Manager Diane Stoddard - Assistant City Manager |
|
FROM: CC: |
Mike Lawless – Asst. Director of Utilities Dave Wagner – Director of Utilities |
|
|
Philip Ciesielski – Asst. Director of Utilities Mark Hegeman - Utilities Operations Superintendent Bob Brower - Utilities Field Operations Manager Alan Landis - Purchasing Specialist |
|
Date: |
April 10, 2013 |
|
RE: |
April 16, 2013 Agenda Item – Award contract for the 2013 Cured in Place Pipe Rehabilitation Project |
Please include the following item on the City Commission Agenda for consideration at the April 16, 2013 meeting:
History:
The Integrated 2012 Wastewater Utilities Plan identified two programs for sanitary sewer rehabilitation, the Sewer Rehabilitation and Replacement Program and the Rapid Inflow/Infiltration (I/I) Reduction Program. These are multi-year plans to rehabilitate and remove I/I from the sanitary sewer system. Both Programs will use Cured-In-Place-Pipe (CIPP) as a rehabilitation strategy.
Part of the Utilities Department’s efforts at I/I reduction is to repair/reconstruct existing sewer lines that are a source of I/I. CIPP is one of the methods used. The CIPP method involves lining the inside of vitrified clay pipe sanitary sewer mains without excavation. Therefore there is very little disruption above ground.
The Utilities Department has a multi-year plan to rehabilitate city owned vitrified clay sewer mains using this trenchless method. Line segments are selected for rehabilitation on the basis of several factors. These factors include:
· Known defects based on maintenance and TV inspection records
· Pipe Age
· Pipe Material
· Presence of unused taps or connections that may contribute inflow/infiltration
· Depth
· Above ground conditions
CIPP is a cost effective method of sewer main rehabilitation when compared with other more invasive methods. As an example, the cost of 8-inch sewer main rehabilitation for this project is $21.75 per foot and the Delaware/New Hampshire Reconstruction Project averaged more than $340 per foot for 8-inch sewer main.
Project Summary
The proposed rehabilitation projects consists of, but is not limited to, the lining of approximately 15,006 linear feet of 8-inch VCP sanitary sewer pipe, 1,796 linear feet of 10-inch VCP sanitary sewer pipe, 602 linear feet of 12-inch VCP sanitary sewer pipe, using water or air inversion Cured-in-Place Pipe technology, cleaning and closed circuit television inspection (before and after). An overview map of the project is attached.
On 03/12/13 the City Commission approved a bid date of 04/09/13 for this project. Three bids were opened at that time (bid tab attached) with Layne Inliner, LLC being the low bidder at $395,936.35. Staff reviewed the bids, qualifications and checked references and recommends award of the contract to the lowest bidder Layne Inliner, LLC.
The award of this contract will complete approximately 17,400 feet of sanitary sewer lining. The contract allows sanitary sewer mains identified through the Rapid I/I Reduction Program to be added to the contract at the bid unit prices at a later date.
Project Funding:
Funding for the 2013 Cured in Place Pipe project will come from the 2013 Capital Improvement Plan (CIP) I/I Improvements, non-bonded construction fund. Funding for the sanitary sewer mains identified in the Rapid I/I Reduction Program will come from the 2013 CIP Revenue Bonds.
Action Request:
Staff recommends:
Thank you for your assistance. Please advise if you have any questions.