City of Olathe WTP Expansion Study And 30% Design
The City of Olathe (Kansas) currently has two water treatment facilities. Water Treatment Plant No. 1 is a surface water treatment plant with a capacity of 4 mgd. Water Treatment Plant No. 2 treats groundwater under the influence of surface water and has a capacity of 17 mgd.
High growth over the past six years, coupled with limited firm yield of Water Treatment Plant No. 1, drove Olathe to seek additional treatment capacity at Water Treatment Plant No. 2. Olathe selected Carollo to assess the expansion of this facility.
The study recommended increases in pretreatment and softening capacity through innovative modifications to existing infrastructure involving the addition of filtration capacity through low-pressure membranes. The expansion would increase overall capacity to 30 mgd, with provisions in the hydraulic system and building structures to supply up to 44 mgd in the future. Due to a tight schedule that required the improvements to be complete by the peak demand season in 2005, Olathe opted for project delivery via design/build. Carollo maintained a leadership role as engineer and produced a 30-percent set of plans and specifications. The 30-percent design effort included membrane piloting for a three-month period in order to produce reasonable design criteria for four prequalified membrane manufacturers. Carollo delivered the 30-percent plans and specifications and then joined with a national contractor in a "progressive" design/build to meet the project's aggressive schedule.
The project recently received the Excellence in Construction Eagle Award (1st Place) given by the Associated Builders and Contractors in conjunction with the Design Build Institute of America (DBIA).
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