Mulvane Wastewater Treatment Plant Improvements

Mulvane Wastewater Treatment Plant Improvements

Location: Mulvane, Kan.

Client: City of Mulvane, Kan.

Completion Date: 2013

In June 2011, Mulvane retained the services of Burns & McDonnell/CAS LLC to design and construct wastewater improvements under a fast-track, lump-sum design-build contract. The project had a very tight schedule that was dictated by the opening date of a new casino. This schedule required design and construction to be complete in a seven-month period. However, in order to support finishing trades at the casino and complete testing for the certificate of occupancy, the flow actually had to be accepted much earlier. The flow acceptance date shifted from Dec. 23 to Nov. 7. In addition, during the course of the project, nearly $1.5 million of additional work was added to the design-build contract. This work was at different sites and was required to support both the treatment plant and the casino opening in February 2012. Phase 1 recommended improvements included:

  • Primary treatment of casino flow--screening, grit and grease removal, and flow equalization.
  • Expanded aeration capacity in the existing aeration basins.
  • An anoxic selector basin for improved biological nitrogen removal.
  • Chemical feed systems at the plant and along the casino forcemain.

In 2012, Peninsula Gaming and the City of Mulvane awarded the second phase of wastewater treatment improvements to Burns & McDonnell/CAS LLC on a noncompetitive, negotiated basis. The facility improvements will provide the wastewater treatment plant capacity out to design year 2027 and include:

  • Expanded secondary treatment capacity with a third Schreiber treatment train and a new flow splitting structure.
  • A cover for the anoxic selector basin.
  • Modification of the aerobic digester aeration system to coarse-bubble diffusers.

Among the recognitions and honors the project has garnered:

  • 2013 Engineering Excellence National Recognition Award, American Council of Engineering Companies
  • 2013 Engineering Excellence Award, American Council of Engineering Companies of Kansas
  • 2012 Public Improvement Award (5,000-19,999 population), American Council of Engineering Companies of Kansas
  • 2012 Award of Excellence, Associated General Contractors of Kansas
  • 2012 Honor Award for Water/Wastewater Projects under $10 million, Design-Build Institute of America
  • Design-build
  • Sustainable building strategies
  • Stakeholder management
  • Facility planning
  • Flow equalization
  • Biological nutrient reduction

In 2010, the Kansas State Racing and Gaming Commission awarded a license to Peninsula Gaming for the construction and operation of a 1,850-machine casino, 24-acre event and equestrian center, and 300-room hotel in Mulvane, Kan. The license stipulated a grand opening of February 2012. A utility agreement was included in the license application, specifying utilities would be provided by the City of Mulvane and infrastructure improvements would be reimbursed by Peninsula Gaming. Construction of the casino was initiated under an understanding that the existing wastewater treatment system had adequate capacity to support the development. However, an assessment of representative casino wastewater in early 2011 indicated high-strength pollutants could exceed the design pollutant loading of the wastewater treatment plant.

  • Reuse of existing infrastructure (structures and piping) for changed function
  • Incorporation of natural lighting (insulated glazing and glass block)
  • Long-life, low-maintenance masonry building construction
  • Highly reflective (white TPO membrane) and insulted metal panel roofing
  • Perlite CMU Building insulation
  • High-efficiency building HVAC (ASHRAE 90.1)
  • Green refrigerant (R-410A)
  • Non-CFC for mechanical insulation
  • HID and fluorescent lighting
  • Low-VOC coating systems
  • Anoxic treatment to reduce energy consumption and annual cost
  • Gravity flow-through process; no intermittent pumping
  • Premium efficient electrical motors
  • VFD motors to match energy input to process demands
  • On-site irrigation of liquid biosolids for agricultural benefit
  • Earth contact insulation of process units for heat conservation
  • On-site borrow to reduce transportation costs