The Department of the Army Corps of Engineers awarded a $436,584 purchase order to Ryzhka International LLC to replace turbine oil at the Dardanelle Powerhouse in Dardanelle, Arkansas. The solicitation sought approximately 48,000 gallons of turbine oil to replace the existing Shell T68 oil, with deliveries occurring in two windows from March to June 2021 and September to December 2021. Testing of oil samples was required before and after delivery in batches. The contract has a NAICS code of 324191 for petroleum lubricating oil and grease manufacturing and was set aside for total small businesses. The Army Corps of Engineers Engineering District Little Rock issued the solicitation to support operations at the Dardanelle Powerhouse, part of the Corps' civil works mission to maintain navigation on the Arkansas River.