After a solid week of testing and scrutinizing with aircraft, acoustic detection devices and water pressure, ConocoPhillips declared Tuesday that there is no leak in a stretch of its fuel pipeline between Enaville and Cataldo.

The company deemed it safe to restart the line that evening, said Jeff Callender, company spokesman.

"We're confident that we have a reliable pipeline," he said.

The energy company received the green light to pump unleaded gasoline through the pipeline again on Tuesday from the Department of Transportation, following an 8-hour federal hydrotest conducted at a higher pressure than a similar test done over the weekend.

"We finished that, and there were no problems, no leaks, no indications of anything irregular," Callender said.

The six-mile stretch of the pipeline, which crosses the Coeur d'Alene River, had been isolated since Oct. 1, when the company's control center first detected a drop in pressure in that section.

Floating booms were propped in the water as a precaution as crews scrambled to find a leak, with folks walking the line and aircraft flying overhead.

The company also tried to detect leaks through sound with an acoustic device and then by pumping water through the section, to no avail.

"We deployed a lot of resources for this, but that's our operating philosophy as a company, to err on the side of caution and be prepared for whatever might present itself," Callender said, adding that state and federal agencies, as well as Benewah County, have been cooperative throughout.

Booms and a vacuum truck were to remain on hand when the line restarted, he added, in case of any issues.

Some technical staff will continue to investigate what caused the initial drop in pressure, he added, which he suspects could be due to temperature.

"As the temperature of the ground increases or decreases, the pressure of the line can go up or down," he said.

Marc Kalbaugh with the Department of Environmental Quality said he has no concerns about the line being started again.

"ConocoPhillips performed a number of different tests and they all proved to be negative," Kalbaugh said. "They did not find any evidence of a leak, so yes, we're OK with them starting the pipe."

Although fuel hasn't been able to travel through the pipeline stretching from Montana to Washington throughout this time, Callender said, the incident didn't result in any supply disruptions.

"We are able to continue to supply our customers," he said.