MWY provided design services for an expansion project currently under construction at the Clarksville Water Treatment Plant to increase treatment capacity from 12 to 16-MGD.
Progressive measures included using the Alternative Negotiated Purchasing method allowed by Arkansas law for projects exceeding $2 Million. Using this qualifications-based process, a Construction Manager (CM) was selected during the design process. With the CM as a member of the design team, alternatives were identified and quickly analyzed for cost, resulting in final economical design providing a significant cost savings to the utility.
The new facilities include: four dual media filter cells, a backwash water storage clear well, clarifier flow division structure, filter flow division structure, and a new finished water meter station.
Improvements to the existing ozone disinfection facilities are also being constructed including a new 150,000 gallon pre-ozone contact basin and an ozone injection equipment building. These facilities are designed to provide further disinfection of the pathogenic organism, Cryptosporidium, and maintain compliance with the Long Term 2 Enhanced Surface Water Treatment Rule.
This plant was the first in Arkansas to use ozone as the primary disinfectant and granular activated carbon as a filter media for SOC removal. This plant will now also be the first in Arkansas to use ozone for disinfection of Cryptosporidium. MWY designed the original 8-MGD facility completed in 1993, and the subsequent expansion to 12-MGD in 2003.