RAPID CITY, South Dakota (AP) — CNN founder Ted Turner is opposing construction of the Keystone XL oil pipeline, which would be built close to his buffalo ranch in South Dakota.

The pipeline would deliver oil from Canada’s Alberta province to the U.S. Gulf Coast, running through Montana, Nebraska and South Dakota in the Great Plains.

CNN recently broadcast a commentary in which Turner says the pipeline shouldn’t be built.

The manager of Turner’s 141,000-acre (57,000-hectare) buffalo ranch southwest of Pierre says the pipeline would cross the Bad River about 15 miles (24 kilometers) upstream from the ranch. The river flows through Turner’s property.

Manager Tom LeFaive tells the Rapid City Journal the project should at least guarantee that a percentage of the Canadian crude oil is used in the United States.