Wahpeton Water Tower

Wahpeton, Ia | Water

Overview

ISG designed a new water tower to increase the City of Wahpeton's (the City’s) water supply capacity during peak summer months, while simultaneously meeting chlorine contact time (CT). Mixing and recirculation was also evaluated and designed to control the formation of disinfection by-products (DBPs) within the increased volume of the new water tower.


Opportunity

Located on the popular West Lake Okoboji, the City struggled to provide consistent water service to its community during the summer months, due in large part to their water tower’s limited holding capacity of 50,000 gallons. Rather than continuing to supplement water use from a nearby community, the City decided to increase its water storage capacity, capitalizing on its proximity to Iowa’s second largest fresh water source and its own treatment plant.

Solution

To meet the City’s year-round water supply demands, ISG was charged with designing and overseeing the construction of a new 200,000-gallon water tower to replace the existing 50,000-gallon tower. Planning and design for a water tower with inconsistent water demand posed some challenges, as water with older water age has the potential for DBPs to form and compromise water quality. Applying innovative solutions, ISG’s water solutions experts integrated a Tideflex mixing system into the final design that utilized a recirculation pump to create active mixing and accounted for swings in water storage needs and usage throughout the year. To ensure the City satisfied the strict CT requirements that were needed due to utilizing a surface water treatment system from West Lake Okoboji, the plant was reclassified from a direct to a conventional filtration facility.


Market News

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ISG Named Business of the Year by Grow Cedar Valley

June 22, 2020 (Waterloo, Iowa) – Based on its growing presence in eastern Iowa and efforts to give back to the community, ISG has received the 2020 Business of the Year Award from Grow Cedar Valley, an organization devoted to the growth of businesses in the region. ISG’s Waterloo office was honored as one of two businesses of the year (1-50 full-time employees), marking the firm’s growing impact in the region since expanding its footprint to Waterloo in 2018.
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