Memorandum

City of Lawrence

Utilities Department

TO:	David L. Corliss – City Manager Diane Stoddard - Assistant City Manager Casey Toomey – Assistant City Manager
FROM:	Nicholas Hoyt – I/I Manager
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:	September 10, 2014
RE:	Agenda Item – Award contract for Project UT1424-2014 Cured in Place Pipe Rehabilitation Project

Project Background

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) and manhole rehabilitation as rehabilitation strategies.

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 infrastructure 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 $22.50 per foot compared to open trench sewer replacement projects that have averaged more than $300 per foot for 8-inch sewer main.

Project Summary

The proposed rehabilitation project consists of lining of approximately 34,671 linear feet of 8-inch VCP sanitary sewer pipe, 745 linear feet of 10-inch VCP sanitary sewer pipe, 348 linear feet of 12-inch VCP sanitary sewer pipe, 1,575 linear feet of 15-inch VCP sanitary sewer pipe, and completing several different rehabilitation methods on 80 sanitary sewer manholes.  This is a cooperative project with the Public Works Department.  A total of 1,085 linear feet of storm sewer ranging in size between 18 inch and 24 inch diameter will also be rehabilitated as part of this project.  The proposed sewer rehabilitation will be completed using water or air inversion CIPP technology, cleaning and closed circuit television inspection (before and after). An overview map of the project is attached.

On April 14, 2014, Johnson County Wastewater (JCW) received bids for a 5-year term and supply project, CMSD No. 19 Collection System Rehabilitation and Repair with Cured-In-Place Pipe. SAK Construction, LLC was the selected bidder based on unit costs and qualifications.  SAK Construction, LLC has released that bid to other prospective purchasers as a cooperative bid.  SAK Construction, LLC provided will complete the Lawrence 2014 Cured-In-Place Pipe Rehabilitation Project for $1,040,944.50.  The unit prices in this quote were as established in JCW’s competitively bid term and supply contract.         

The award of this contract will complete approximately 38,424 feet of storm and sanitary sewer lining and rehabilitate 80 sanitary sewer manholes. Department staff has reviewed the unit costs offered as part of this cooperative bid, compared it to past bid projects completed for the City and other area communities.  Department staff reviewed the qualifications, checked references and recommends awarding the contract to SAK Construction Inc.

Project Funding

The project is included in the Department of Utilities 2014 Rate Plan and Capital Improvement Program.

Action

Authorize the City Manager to execute a contract agreement in the amount of $1,040,944.50 with SAK Construction, LLC for Project UT1424 – 2014 Cured In Place Pipe Rehabilitation.