The Hartley plant, located on 350 acres about 100 miles southeast of Sioux Falls, South Dakota, produces ethanol, distillers grains livestock feed and fuel- and feed-grade corn oil. With original startup in August 2008, the plant was acquired by Valero in April 2009. Corn is purchased from within 40-50 miles.

By the Numbers


In Our Community

Hartley Employees Give Back

Back of Valero volunteer t-shirt

United Way Giving

More than $620,000 contributed to the United Way of Spence through employee pledges, additional donations and company matches since 2013.

Valero Texas Open golf ball

Benefiting Children

Since 2013, a total of $313,000 from the Valero Texas Open and Benefit for Children was given to local children's charities.


Volunteer Hours

Hartley employees have volunteered nearly 14,000 hours to help support local nonprofits for the last five years.

Safety Awards & Honors

  • Firefighting helmet and equipment

    Multiple quarterly Valero STAR Metric award for achieving no incidents in five key areas of process safety, reliability, environmental, rail safety, and policy and procedure compliance.

  • All-time leader in Valero Chairman’s Renewables Plant Excellence awards, with four dating to 2010, judged across several measures from safety, reliability and environmental performance to production and community support.

Local Information

Farmers Work Hard to Produce and Harvest Corn

At Valero, we work hard to maximize the value of U.S. corn production by connecting farmers to premium markets across the globe.


Contact Us Plant Manager: Kraig Kruger