RAPID CITY, S.D. (AP) -- South Dakota Gov. Dennis Daugaard says he's confident in safety standards for a pipeline project that has come under public scrutiny after a spill near the border of North and South Dakota.

TransCanada Corp.'s Keystone pipeline brings oil from Canada through the eastern Dakotas to other states. A planned expansion of the project would carry oil through western South Dakota.

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Daugaard told KEVN-TV the South Dakota Public Utilities Commission has been holding extensive hearings on the expansion project. He said there will be safeguards in place to protect the environment.

A leak at a pipeline pumping station in southeastern North Dakota on May 7 spilled more than 14,000 gallons of crude and prompted that state's Public Service Commission to launch a formal investigation.

The pipeline resumed pumping Friday.