David Shaffer

Reporter | Energy and business
Phone: 612-673-7090
David Shaffer is a veteran reporter and editor for the Star Tribune, with more than three decades of experience on daily newspapers.

Recent content from David Shaffer

Biofuel innovators look for a breakout

In a northeast Minneapolis laboratory, veteran chemical engineers think they have found a better way to produce biodiesel from waste...

Updated: December 13, 2014, - 02:00 PM

N.D. oil production hits a lull amid plummeting prices

N.D. officials said oil production in October declined by about 4,000 barrels per day to 1.18 million daily barrels compared with September. Drilling for new wells also declined.

Updated: December 13, 2014, - 06:08 AM

Chris Clark named Xcel's Upper Midwest division president

Christopher Clark takes over Jan. 1 and is a 15-year veteran of Xcel.

Updated: December 11, 2014, - 09:37 PM

As one solar company departs, another arrives in Minnesota

Solar Skies said it will close its Alexandria plant, while a Canadian company will open one in St. Paul.

Updated: December 10, 2014, - 08:06 PM

North Dakota regulators order treatment of crude oil for safety

A Minnesota official applauds the change, to make crude oil less volatile by reducing gases, but also said more can be done.

Updated: December 09, 2014, - 10:57 PM

Xcel says it doesn't owe nuclear contractor

Utility files reply and counterclaim in $45 million legal dispute over upgrade costs at Prairie Island Nuclear Power Plant.

Updated: December 04, 2014, - 05:36 AM

Dec. 2, 2014: U study finds more evidence of harm linked to taconite dust

Six-year study found that workers exposed to high levels of airborne mineral fibers were more than twice as likely to develop the cancer.

Updated: December 02, 2014, - 05:20 AM

Sparby retires as Xcel's Minnesota CEO

33-year veteran Dave Sparby expanded energy efficiency efforts at the utility.

Updated: November 24, 2014, - 09:22 PM

Clean energy groups join N.D.-Minn. energy appeal

The two-year legal battle over a state energy law’s effect on coal-burning utilities in N.D. is attracting national attention.

Updated: November 24, 2014, - 09:13 PM

EPA delays decision on biofuel blending mandate

Ethanol makers had criticized the agency’s proposed limits on how much biofuel must be blended into motor fuels.

Updated: November 21, 2014, - 08:15 PM

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