Memorandum

City of Lawrence

Utilities Department

TO:	David L. Corliss – City Manager Cynthia Wagner - Assistant City Manager Diane Stoddard - Assistant City Manager
FROM:	John Shutak – Utilities Engineer
CC:	Dave Wagner – Director of Utilities Mike Lawless – Deputy Director of Utilities Philip Ciesielski – Asst. Director of Utilities Beth Krishtalka – Assistant to Director Bob Brower – Utilities Operations Superintendent
Date:	April 09, 2014
RE:	April 15, 2014 Agenda Item – Set a bid date for Bid No. B1425 UT1405, Large Valve Replacement.

Please include the following item on the City Commission Agenda for consideration at the April 15, 2014 meeting:

Set a bid date of May 06, 2014 for Bid No. B1425, for project UT1405 Large Valve Replacement.

Project Description:

The large valve replacement project includes the installation of a 20” butterfly valve on the existing 1954 20” concrete transmission main on the east side of Kentucky Street and north of 10^th Street, as shown on the attached map. The project will be completed by September 30, 2014 per the contract documents.

Project History:

Staff continually assess the condition of valves within the water transmission and distribution systems and, during 2013 and 2014 annual inspections, found a number of large valves (14” and larger) to be in poor or inoperable condition and in need of replacement.

Project Details:

Staff developed a listing of valves 14” and larger in need of replacement based on field inspection records and prioritized their order of replacement based on age, overall condition, and criticality. The following priority replacement list was developed based on valve condition, age, and criticality:

Priority          Location                 Size    Pipe Material (Age)

1                  8^th & Kentucky                   20”     Concrete (1954)

          2                  8^th & Tennessee       14”     Cast Iron (1886)

3                  2^nd & Maine             16”     Concrete (1954)

4                  21^st & Carolina                   16”     Cast Iron (1970)

The existing 20” valve at 8^th & Kentucky was selected as the first priority primarily due to its condition as it is in the open position and is completely inoperable. Staff began by evaluating the location of existing valves on the 20” concrete transmission main to determine if replacement of the inoperable valve at 8^th & Kentucky in its current location would be warranted. Existing valves on the 20” concrete transmission main are located at the southeast corner of 6^th & Tennessee, the northwest corner of 8^th & Kentucky, in the intersection of 8^th & Kentucky, and on the east side of the intersection of 12^th & Tennessee as shown on the attached map. Based on the location of the existing valves it was determined an alternate location should be selected. Staff reviewed spacing and areas available where the existing 20” concrete transmission main could be exposed for sufficient length to perform the necessary work. It was determined that the northeast corner of 10^th & Kentucky was the most suitable location to install a new valve on the existing transmission main. This location provides clear area to permit the work to be performed without interruption of traffic on Kentucky Street, optimizes spacing between valves as valves will now be spaced approximately every two blocks from 6^th to 12^th Streets, and will permit future inspection of the concrete transmission main from the new valve at 10^th & Kentucky north to the valve at 8^th Street and south to the valve at 12^th Street. The existing inoperable 20” valve located in the intersection 8^th & Kentucky Streets will be left in place and removed from the system as part of a future project.

Staff has completed plans and specifications for the project which will be available to prospective bidders by April 16, 2014. The project will require restriction of the parking lane on the east side of Kentucky Street along the frontage of 214 W. 10^th Street as well as restriction of pedestrian access to sidewalks through the work zone. No significant traffic impacts or interruptions of water service are planned or anticipated for the project.

Project Funding:

The project will be funded from the Department of Utilities bonded construction fund. Resolution 7019 authorized the sale of general obligation bonds and/or revenue bonds for water system improvements and capital from the 2013 bond issuance is available to complete the project.

Action Request:

Set a bid date of May 06, 2014 for Bid No. B1425, for project UT1405 Large Valve Replacement.

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