Memorandum

City of Lawrence

Public Works

TO:	David L. Corliss, City Manager
FROM:	Chuck Soules, Director of Public Works
CC:	Diane Stoddard, Cynthia Wagner, Jonathan Douglass; Bobbie Walthall; David Cronin, Mark Thiel, Matt Bond
DATE:	June 11, 2013
RE:	Project PW1133_Maple Street Pump Station, Stormwater Improvements & Design Services

Please include the following item on the City Commission Agenda for consideration at the June 18, 2013 meeting.

Project Background.  The North Lawrence Drainage Study (NLDS) was received by the Lawrence City Commission in January 2006.  One of the recommendations of the NLDS was the upgrade of the pump station on Maple Street in North Lawrence.  It also detailed the upgrading of the storm sewer infrastructure both up and downstream of the pump station.  In November 2008 the community overwhelmingly supported a 0.3% sales tax for infrastructure improvements.  The City began collecting sales tax funds in April 2009.  The Maple Street Pump Station was specifically designated to use this revenue source.  In preparation for the construction of the pump station, the parcels adjacent to the existing pump station were purchased in July 2010.

In October 2012, Bartlett & West were hired to complete a preliminary engineering study (attached) to evaluate the proposed configuration and magnitude of stormwater improvements within the System 6 drainage area located in North Lawrence.  The preliminary engineering report will focus on refining the proposed concept presented in the HNTB report, which includes replacing the existing pump station with a larger pump station, and increasing the capacity of the drainage system. 

Project Description.  The existing pump station is a converted sanitary sewer lift station with a maximum capacity of approximately 38 cfs (cubic feet per second) and is grossly undersized for the amount of stormwater it handles.  The area designated as "System 6", in the NLDS, contains roughly 192 acres and experiences localized flooding during significant rainfall events (see Attachment A).  The parcels to construct both the pump station and the wet well have already been acquired (see Attachment B). The corresponding piping leading south from the pump station will include involvement from the US Army Corps of Engineers since it will pass through the Kansas River Levee.  The construction of this project will involve the temporary disruption of traffic in areas adjacent to storm sewer pipe installation.

Design Services.  A summary of the scope items is summarized below. 

Preliminary Design Phase (Field Check)

• Attend design meetings with the City.
• Perform UPRR, KDWPT, and USACE permitting and coordination.
• Surveying

o Survey from the system discharge at the Kansas River, over levee, and along 6^th Street right-of-way to Lyon St.

o Survey Lincoln St. from Lincoln Ct. to 7^th St.

o Survey 7^th St. from Lincoln St. to Hickory St.

• Obtain utility information from City.
• Perform hydrologic and hydraulic analysis for the system for a 10% chance annual event based on the rational method used in the Preliminary Engineering Report.
• Determine system hydraulics and determine number and sizes of pumps.
• Determine unit quantities and prepare cost estimate.
• Develop preliminary (Field Check) plans, including pump station layout and plan and profile sheets of proposed system.
• Meet with City and address City’s Field Check comments.

Final Design Phase (Office Check)

• Attend design meetings with the City.
• Attend one public involvement meeting.
• Attend City Commission presentation.
• Prepare right-of-way strip map and right-of-way and easement descriptions for up to 20 tracts for the City’s use in property acquisitions.
• Secure UPRR, KDWPT, and USACE permits.
• Complete rezoning, re-platting, and site planning process for the pump station site.
• Prepare Erosion Control Plan and construction stormwater Notice of Intent for submittal by the City.
• Prepare Final Plans for the project, including:

o Title, Typical Sections, Plan and Profile Sheets, Site Plan, Pump Station Plan and Sections, Wet Well Plan and Sections, Pump and Discharge Piping Layout, Controls and Instrumentation Sheets, Structural Sheets, MEP Sheets, Details, Forcemain Plan and Profile, UPRR Crossing Plan and Profile, Traffic Control Sheets, and Cross Sections.

• Determine unit quantities and prepare final cost estimate for the project.

Additional services beyond the City’s typical Base Services include: 

• Public/Commission Meetings.
• UPRR coordination, exhibit preparation, and permitting.
• USACE coordination exhibit preparation and permitting.
• KDWPT coordination, exhibit preparation, and permitting.
• Right-of-way strip map, right-of-way and easement exhibits, and right-of-way and easement legal descriptions.
• Rezoning, re-platting, and site planning process for pump station site.

Scope items not included:

• Geotechnical investigation/reporting.  The City will request proposals for geotechnical work.
• Pavement analysis/recommendations.  Staff will make recommendations.
• Traffic analysis.
• Hydrologic/Hydraulic SWMM modeling.
• MEP/Structural/Controls for backup generator for pump station.
• Bidding phase services.  City will provide.
• Construction phase services.  City will provide.
• Property appraisal and acquisition services.  City will provide.

Project Budget. 

Pump Station Property Acquisition	$100,000
Preliminary Engineering Report	$  40,000
Geotech	$  25,000 - $40,000
Easement/Property Acquisition	$  50,000
Engineering Design	$400,000
Construction of Pump Station and Down Stream Drainage System	$4.9 million
Construction of Upstream Collection System	$507,000

These estimates are very preliminary as there are many unknowns, especially the geology and water table.  The upstream collection system will be designed and can be bid as an alternate if we receive desirable bids.  This includes the storm sewer improvements along 6^th from Maple to Lyon, along Lincoln from Lincoln Ct. to 7^th St., and ditch grading along 7^th from Lincoln to Hickory St.

Funding will come from the infrastructure sales tax. 

Project Schedule.  This project is planned to be bid next summer (2014) pending Corps and Railroad process and approval.

Action Request.   Authorize the City Manager to execute the Engineering Services Agreement for the Maple Street Pump Station with Bartlett & West in an amount of $399,370.00

Respectfully Submitted,

Charles F. Soules, P.E.

Director of Public Works

CFS/ch