Memorandum

City of Lawrence

Utilities Department

 

TO:

David Corliss, City Manager

Debbie Van Saun, ACM, Community Development Services

FROM:

Bob Brower, Line Maintenance Manager/Wastewater Utility

CC:

Dave Wagner, Director, Utilities

Date:

March 21, 2007

RE:

March 27, 2007 City Commission Agenda

 

Please include the following item on the City Commission consent agenda for consideration at the March 27, 2007 meeting.

 

Renew contract with Mayer Specialty Services, LLC, for the 2007 Sanitary Sewer Manhole Rehabilitation Project.

 

History:

One component of the Utilities Department’s efforts at Inflow/Infiltration (I/I) reduction is to rehabilitate existing sanitary sewer manholes that are a source of I/I. The manholes are rehabilitated by repairing defects and then spraying the interior of the manhole with a fiber reinforced cementitious mortar. The process will provide a monolithic liner capable of stopping I/I and restoring structural integrity.

 

The Utilities Department has a multi-year plan to repair/rehabilitate manholes in older sections of the City. Manholes are selected for rehab on the basis of several factors.  These factors include:

·         Manhole defects (inspection rating system) based on maintenance and inspection records.

·         Manhole age and construction components 

·         Presence of I/I

·         Sanitary sewer manholes associated with 2007 cured in place pipe project

 

On June 5, 2006 bids were opened for the 2006 Manhole Rehabilitation program.  The vendors also bid on costs for 2nd and 3rd year contract renewal.  Six vendors bid on the project and the results are shown below.

 

Bidder

2006 Per Vertical Foot Cost

2007 Per Vertical Foot Cost

2008 Per Vertical Foot Cost

Mayer Specialty

$70.45

$70.45

$70.45

Pyramid Excavating

$75.17

$81.00

$88.00

Ace Pipe Cleaning

$78.50

$85.50

$92.50

Utility Maintenance

$85.23

$90.00

$98.00

KIM Construction

$103.00

$113.00

$125.00

Midlands

$104.00

$105.00

$106.00

 

 

 

 

 

Project Status:

The 2006 Manhole Rehabilitation program was awarded to Mayer Specialty Services and began August 2006 and was completed in November of 2006.  The results were satisfactory and the Utilities Department wishes to renew the contract with Mayer Specialty Services, LLC for the 2007 work. The 2007 project includes 306 manholes which translate to 3076 vertical feet. The average depth of each manhole is 10 feet.

 

Project Funding:

Funding for the 2007 CIPP Program will come from the non-bonded construction fund for 2007.

 

Action Request:

Utility Department staff requests approval from the City Commission to authorize the City Manager to execute a contract agreement and purchase order with Mayer Specialty Services, LLC in the amount of $216,674.85 to complete the 2007 Manhole Rehabilitation Manhole Program.

 

Thank you for your assistance.  Please advise if you have any questions.