Wet Weather Capacity Expansion at the Dry Creek WWTP

Hazen and Sawyer to Design Improvements to 46-mgd Plant

(CINCINNATI, OH – February 9, 2010) – Hazen and Sawyer was recently awarded a significant design contract for design of improvements at the Dry Creek Wastewater Treatment Plant. Dry Creek is located in northern Kentucky and is owned and operated by Sanitation District No. 1 of Northern Kentucky (SD1). SD1 serves more than 330,000 customers in areas of Boone, Campbell, and Kenton Counties.

The Dry Creek WWTP has a rated capacity of 46 mgd and has been the primary treatment facility in the SD1 system since the early 1980s. Hazen and Sawyer has provided engineering services at the plant since 2004, drawing technical resources from many different Hazen and Sawyer offices in surrounding states. The current proposed improvements include:

• New 110-mgd capacity headworks including screening, grit removal, and flow measurement.
• 6,500-cfm scrubber for biosolids odor control.
• Improvements to final clarifier splitter box to equalize flow splits and increase hydraulic capacity.

The improvements will significantly increase the wet weather flow capacity of the plant and will address significant issues related to odor control and hydraulic flow splits.

Since our founding in 1951, Hazen and Sawyer has focused on two things: providing safe drinking water and controlling water pollution. Our range of services encompasses the planning, design, and construction management of water and wastewater-related projects – from clean water treatment, storage, and distribution to wastewater and stormwater collection, treatment, and reuse.

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