Memorandum

City of Lawrence

Utilities Department

 

TO:

David L. Corliss – City Manager

Cynthia Wagner - Assistant City Manager

Diane Stoddard - Assistant City Manager

FROM:

Melinda Harger – Utilities Engineer

CC:

Dave Wagner – Director of Utilities

Mike Lawless – Deputy Director of Utilities

Philip Ciesielski – Assistant Director of Utilities

Beth Krishtalka – Assistant to Director

Mark Hegeman – Utilities Operations Superintendent

Dave King – Utilities Maintenance Superintendent

Date:

April 14, 2014

RE:

Agenda Item – Receive Update from Staff on the Pump Station No. 10 Public Meeting and Approve Architectural Concept of a Fully Bermed Green Roof for Pump Station No. 10

 

Background/Project Description

The 2012 Wastewater Utilities Master Plan and Capital Improvements Program recommend the construction of the Wakarusa Wastewater Treatment Plant (WWTP) and Conveyance Corridor facilities to be online in 2018.  These improvements are required to mitigate wet weather surcharging of sanitary sewers along the 31st Street Corridor, provide for relief of wet weather overloading at the existing WWTP, and provide additional organic treatment capacity to provide for future growth of the community.

 

The Wakarusa WWTP improvements include the influent Pump Station #10 facility on the northwest corner of 31st and Louisiana.

 

Project Status

March 12, 2013 – City Commission authorized staff to advertise a Request for Proposals for Engineering Services for the Wakarusa Wastewater Treatment Plant and Conveyance Corridor Facilities. 

 

July 23, 2013 – City Commission authorized execution of the engineering services agreement with Black & Veatch Corporation in partnership with PEC and Bartlett & West for initial project design services.

 

October 22, 2013 – City Commission authorized execution of Supplement Agreement No. 1 with Black & Veatch in partnership with PEC, Bartlett & West, and Treanor for preliminary design for the WWTP and pump station as well as final design of the force mains, roads adjacent to the WWTP, and WWTP site fill. 

 

December 18, 2013 – Planning Commission voted to approve the rezoning and preliminary plat for Pump Station No. 10.

 

January 30, 2014 – A public meeting was held to present and discuss the architectural renderings for Pump Station No. 10.

 

March 4, 2014 – City Commission acknowledged the final plat for Pump Station No. 10. 

 

Public Input

Residents provided comments on the architectural renderings at the public meeting held on January 30th at the South Middle School.  Additional public comments on the project were received by email. 

Based on written and verbal public comments, residents would prefer the fully bermed green roof option #3 with a stone-look similar to the faηade on the at-grade building option #1.

Each resident that attended the public meeting and provided contact information was sent a letter that summarized the status of the architectural concept for Pump Station No. 10 and invited meeting attendees to give public comment at the City Commission meeting on April 22, 2014.

Staff Recommendation

Utilities staff recommends the full berm green roof option #3 for the following reasons:

·         Energy Efficiency – The greater insulation offered by the bermed green roof will reduce the amount of energy needed to moderate the temperature of the structure.

·         Roof Durability – The life expectancy of the bermed green roof exceeds that of traditional roof materials.

·         Stormwater Management – Green roofs reduce stormwater runoff by decreasing impervious area on the site.

·         Public Preference

Project Schedule

Detailed design of Pump Station No. 10 is scheduled to be complete by early 2015 for construction to begin in April 2015.  Construction on Pump Station No. 10 is expected to be complete by the end of 2016.

                                                                          

Project Funding

The project is included in the Department of Utilities Rate Plan and Capital Improvement Program.  An essential next step for this project will be approval of the necessary rate increases that follow the rate plan adopted last year.  The rate increase proposals will be part of the upcoming budget season.

 

Action

Approve the architectural concept of a fully bermed green roof for Pump Station No. 10 for Project UT1304 Wakarusa Wastewater Treatment Plant and Conveyance Corridor Facilities.

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