Memorandum
City of Lawrence
Utilities Department
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TO: |
Diane Stoddard Interim City Manager Casey Toomay Assistant City Manager Brandon McGuire Assistant to the City Manager |
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FROM: |
Andy Ensz Utilities Project Engineer |
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CC:
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Dave Wagner Director of Utilities Mike Lawless Deputy Director of Utilities Philip Ciesielski Assistant Director of Utilities Beth Krishtalka Assistant to the Director Mark Hegeman Utilities Operations Superintendent Dave King Utilities Maintenance Superintendent Aurora Shields Water Quality Manager |
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DATE: |
December 28, 2015 |
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RE: |
Award the Bid for Bid Number B1554, Clinton Water Treatment Plant Phase 1 Taste and Odor Improvements Project UT1209 to the low bidder Crossland Heavy Contractors in the amount of $3,879,000.00 and authorize the Interim City Manager to execute the construction contract. |
Background
The generation of taste and odor compounds and algal toxins in the City of Lawrence, KS raw water sources has occurred periodically. These sources are surface water from the Clinton Reservoir and Kansas River. There is small contribution of Kansas River alluvial well water. At present, the sources are separate and treated at plants dedicated to each. Clinton Reservoir water is treated at the Clinton Water Treatment Plant, and Kansas River surface and well water is treated at the Kaw River Water Treatment Plant. Both plants generally employ presedimentation, powder activated carbon addition, lime softening, disinfection by sodium hypochlorite and dual media filtration.
The current treatment plant processes provide sufficient reduction of geosmin for most events of record to produce finished water below the taste sensitivity of most humans. The most recent event at Clinton Lake occurred in June 2015. Another event, which persisted for about ten days during June 2012, had raw water geosmin levels that exceeded any previous event of record by nearly four times. The inability of the current treatment process to remove these high levels of geosmin resulted in customer calls regarding the taste and odor of the drinking water.
Presently, algal bloom events related to the generation of geosmin, MIB and/or algal toxins are not well understood. The City of Lawrence is currently working with United States Geological Survey, the US Army Corps of Engineers and other area utilities in several scientific studies to understand these events and attempt to predict their future frequency and severity.
The City of Lawrence contracted with Burns & McDonnell in 2013 to conduct a study evaluating the capability of both the Kaw and Clinton Water Treatment Plants (WTP) to reduce taste and odor (T&O) causing compounds. The purpose of the project was to evaluate drinking water treatment processes that will enhance the removal of taste and odor compounds, microtoxins and viruses at the Clinton and Kaw water treatment plants. The scope of the work included water testing and analysis; evaluation of existing plant processes; evaluation of additional treatment processes, and existing process modifications; estimated capital, and operational and maintenance costs of proposed options; and the present worth value of the proposed options. Treatment options evaluated included advanced oxidation, filtration, and adsorption technologies.
The study recommended a number of improvements to existing processes to improve T&O mitigation at the Clinton WTP. These recommendations include addition of a new rapid mix system, carbon dioxide system, ferric system, liquid lime system, and tube settlers in the primary basin. A new lime system was also recommended for the Kaw WTP to provide a higher quality lime and reduce operational costs.
The currently recommended Phase I process optimization project incorporates all of the recommendations from the 2013 study for improvements at the Clinton WTP as well as some additional scope items requested by the City, including painting of the South Train basins at the Clinton WTP, operator training, and post construction process testing and optimization.
Project History
On August 21, 2012, the City Commission authorized staff to advertise a RFP for Engineering Services for Taste and Odor, and Algal Toxin Water Treatment Process Evaluation Project UT1209.
On December 3, 2012, the City Commission authorized staff to negotiate an Engineering Services Agreement with Burns & McDonnell for the project.
On March 12, 2013, the City Commission authorized the execution of an Engineering Services Agreement with Burns & McDonnell in the amount of $137,128.00 for Taste and Odor, and Algal Toxin Water Treatment Process Evaluation Project UT1209.
On May 20, 2014, the City Commission authorized staff to negotiate a Supplemental Agreement with Burns & McDonnell for Engineering Services for Phase 1 Process Improvements for Taste and Odor, and Algal Toxin Water Treatment Process Evaluation Project UT1209.
On October 14, 2014, the City Commission authorized the execution of a Supplemental Agreement with Burns & McDonnell in the amount of $1,260,880.00 for Design, Bid and Construction Phase Engineering Services for Phase 1 Process Improvements for Taste and Odor, and Algal Toxin Water Treatment Process Evaluation Project UT1209.
On November 10, 2015, the City Commission set a bid date of December 15, 2015 for Bid Number B1554, Clinton Water Treatment Plant Phase 1 Taste and Odor Improvements Project UT1209.
Project Status
On December 15, 2015, bids were received from the following five (5) bidders. The bids were opened and publicly read aloud.
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Crossland Heavy Contractors |
$3,879,000.00 |
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BRB Contractors |
$3,967,000.00 |
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Walters-Morgan Construction |
$4,038,000.00 |
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MEGA Industries |
$4,134,000.00 |
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Garney Companies |
$4,711,000.00 |
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Engineers Estimate |
$4,800,000.00 |
Burns & McDonnell has reviewed the bids and qualifications of Crossland Heavy Contractors and, per the attached letter and bid tab, recommend awarding the bid to the low bidder Crossland Heavy Contractors.
Project Schedule
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Set Bid Date: Advertise: |
November 10, 2015 November 16, 2015 |
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Pre-Bid Conference: Bid Opening: |
December 1, 2015 December 15, 2015 |
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Award: |
January 5, 2016 |
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Notice to Proceed: Project Completion: |
February 1, 2016 January 31, 2017 |
Project Funding
The project is included in the Department of Utilities Rate Plan and Bonded Capital Improvement Program per Resolutions 7019, 7062 and 7107.
Action
Award the Bid for Bid Number B1554, Clinton Water Treatment Plant Phase 1 Taste and Odor Improvements Project UT1209 to the low bidder Crossland Heavy Contractors in the amount of $3,879,000.00 and authorize the Interim City Manager to execute the construction contract.