Memorandum

City of Lawrence

Utilities Department

TO:	David L. Corliss – City Manager Cynthia Wagner - Assistant City Manager Diane Stoddard - Assistant City Manager
FROM:	Leah Morris – Project Engineer
CC:	Dave Wagner – Director of Utilities Mike Lawless –Utilities Deputy Director Philip Ciesielski – Assistant Utilities Director Beth Krishtalka – Assistant to Director Mark Hegeman – Utilities Operations Superintendent Dave King – Utilities Maintenance Superintendent Bob Brower – Utilities Operations Superintendent
Date:	November 12, 2013 – Updated 11/18/13
RE:	Agenda Item – Set a Bid Date for Bid Number B1362, Project UT1302CS Pump Station 04 Redundant Force Main

Please include the following item on the City Commission Agenda for consideration at the November 19, 2013 meeting:

Set a Bid Date of December 17, 2013 for Bid Number B1362, Project UT1302CS Pump Station 04 Redundant Force Main.

Project Description

Sanitary sewer Pump Station PS04 is located at 810 Walnut Street and has a firm capacity of 2800 gpm. PS04 delivers all of North Lawrence’s sanitary sewer flows south across the Kansas River to the Wastewater Treatment Plant (WWTP) at 1400 E. 8^th

Street. PS04 has 2 existing force mains; 1 each 1956 8” diameter steel which is currently out of service, and 1 each 1974 18” diameter cast iron and steel.

In January the Department of Utilities was alerted by a citizen to the presence of an exposed section of pipe in the north riverbank. Investigation by Staff determined the exposed pipe to be the 8” 1956 force main from PS04. Approximately 75 ft of the force main has become exposed due to riverbank erosion.

After an evaluation of the force main’s existing condition, risk of failure and the operational parameters of PS04, it was determined that the force main should be isolated from the system to prevent any discharge of sewage to the Kansas River in the event the pipe failed. In preparation for taking the forcemain out of service it was “pigged” clean and flushed out. The 8” force main is now isolated from the system. The existing 18” force main is hydraulically adequate to convey the pump station’s firm pumping capacity.

Information from the original plans shows the construction of the 8” forcemain to have been to a depth of only five (5) feet below the river bed as it existed in 1956. Based on this, the condition of the exposed pipe and the risk associated with attempting to recover the exposed section the Department of Utilities recommended pursuing the installation of a new, redundant forcemain from PS04 to the Wastewater Treatment Plant to provide reliable sanitary sewer service to North Lawrence.

Professional Engineering Consultants (PEC) was selected to provide engineering and construction services for the Pump Station 04 Redundant Force Main project.  In order to meet current and future demand, 2 new force mains (12” and 14” diameter, each respectively) will be installed from Pump Station PS04 to the WWTP.  The section of the pipe that crosses the levee and the Kansas River will be installed by horizontal directional drilling.  See the attached map (updated 11/18/13) for the location of work.

Project History

On February 5, 2013, the City Commission authorized staff to advertise a Request for Proposals for Engineering Services for the Pump Station PS04 Redundant Forcemain Replacement. 

On March 1, 2013, in response to the Request for Proposals, staff received proposals from five (5) firms interested in the project. Proposals were received from BG Consultants/Burns & McDonnell; Bartlett & West; HDR; Professional Engineering Consultants (PEC), and Wilson & Company.   

On March 26, 2013 the City Commission authorized Staff to negotiate an engineering services agreement with PEC for the project.

On April 16, 2013 the City Commission authorized the execution of the Engineering Services Agreement for the work.

On November 11, 2013 the City staff presented the project at the North Lawrence Improvement Association meeting.

Project Status

PEC has completed the construction documents and the project is ready to advertise for bidding. The project has been approved and permitted by the US Corps of Engineers.

Project Schedule

City Commission Set a Bid Date      November 19, 2013

Prebid Meeting                            December 4, 2013

Bid Opening                                December 17, 2013

Substantial Completion                  May 5, 2014

Final Completion                          June 5, 2014

Project Funding

The estimated cost of the project is $2 million and is included in the Department of Utilities 2013 Capital Improvements Program. 

Action Request: Set a Bid Date of December 17, 2013 for Bid Number B1362, Project UT1302CS Pump Station 04 Redundant Force Main.

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