It looks like any wheeled contraption made of Legos. But it's not.

TVA's tricky job of cutting two holes in the roof of a Sequoyah Nuclear Plant reactor to extract and replace four steam generators has come to a safe end, according to officials.

Tennessee Valley Authority announced today that Sequoyah’s unit 2 reactor is back online after the replacement of four generators.

With the recent flip of a switch, Bonnaroo officials in Manchester, Tenn., turned on the power of the sun to energize the country's first permanent solar array for a music festival.

Dig the flip-flops out from under the boots and galoshes. Chattanooga is about to get a weekend of spring right in the middle of winter.

Three days of concern should be coming to an end this morning as a state contractor fills in a collapsed mine shaft beneath a road leading to three or four homes on Signal Mountain.

Chattanooga zoo officials said Monday that Josie, a 37-year-old female chimpanzee, had been euthanized on Dec. 30 "after weeks of rapid deterioration and weight loss."

Question: How is Marilyn "Mary" Cody doing after Nancy Rus rescued the homeless woman from Chattanooga streets?

Two children were killed in a Murray County traffic accident Friday.

A UT researcher has completed a first-of-its-kind study to predict heat waves for the top 20 cities in the eastern United States.

After leading the Senate to a late nod Tuesday to approve four new TVA board members and give the nation's largest public utility a quorum for the coming year, Tennessee Sens. Lamar Alexander and Bob Corker drew a line in the political sand.

The U.S. Senate on Tuesday approved four new board members to govern the Tennessee Valley Authority, ending concern that the board would be without a quorum in the new year.

Seeing as how the Mayans were wrong about the end of the world, 2013 yawns ahead with promise and plenty of topics to keep under watchful eye.

She was born during the Depression and grew up in the days when the Chattanooga trolley was for whites only.

Two Chattanooga foundations supporting a new Southern Cumberland Land Protection Fund just helped protect 11,364 acres of Cumberland Plateau wilderness in the ecologically significant Paint Rock River watershed of Jackson County, Ala.

Chattanooga attorney Allen McCallie is receiving a national conservation award.

HARRIMAN, Tenn. — Nearly every Saturday morning for four years, Robert M. "Bob" Deacy has gone to a particular spot on Swan Pond Circle to sit with his coffee and watch workers clean up one of the nation's largest industrial environmental accidents.

The TVA vice president in charge of Watts Bar Nuclear Plant left the employment of TVA on Wednesday, but TVA will not say why.

The TVA vice president in charge of Watts Bar Nuclear Plant abruptly left the employment of TVA today, but TVA officials will not say why.

It was the year the Lusitania made its maiden voyage from Liverpool to New York. The Titanic wouldn't even be under construction for two years.

The Tennessee River Gorge Trust is getting ready to announce who will fill the shoes of the retiring Jim Brown — a co-founder of the gorge trust 31 years ago and its executive director since 1995.

If a nuclear accident occurred at Sequoyah Nuclear Plant, would you know what to do?

Flood seals protecting the Sequoyah Nuclear Plant near Soddy-Daisy were found to be degraded last week, just before TVA met for a second time with nuclear regulators about plans to add new protections against a potential giant flood.

Chattanooga should have blue skies and clear sailing under the Environmental Protection Agency's new, tightened air standards for soot pollution imposed Friday, according to local air pollution control officials.

Just as a newly released poll shows Tennessee voters by a 5-to-1 margin support stronger legislation to prevent the soring of Tennessee walking horses, two people recently convicted under the Horse Protection Act have followed a federal judge's order to write newspaper letters about the practice.

Anti-nuclear groups, including some local ones, wrote to the Nuclear Regulatory Commission on Tuesday asking it to require distinctive visual dye markers on normal, permitted radiation emission releases.

Twelve anti-nuclear groups, including some local ones, today sent a letter to the Nuclear Regulatory Commission asking NRC to require distinctive visual dye-markers on normal, permitted radiation emission releases.

East Tennessee's U.S. attorneys say justice pays for itself. Total collections in fines and forfeitures by federal prosecutors in the region for the past three years have been more than two and one-half times the office's total appropriated operating budgets for fiscal 2010, 2011 and 2012, according to William Killian, head of the district office.

Several environmental groups, including one that got a kickstart with TVA's Kingston ash spill, are offering the public an interactive Web page to track coal ash pollution.

TVA's incoming leader will have some authority previously not afforded to a TVA chief executive, thanks to some partisan bickering.

Five Tennessee Valley Authority board members today approved delegations of authority to enable TVA to do business while Congress considers new board nominees.

The battle is still going on to reform the Tennessee walking horse industry.

Tennessee Valley electric ratepayers may be finding themselves on the bench in a game of partisan football in coming weeks.

The Nuclear Regulatory Commission's regulators told TVA nuclear officials Wednesday that it is lifting the white safety findings from the Browns Ferry Nuclear Plant.

ATLANTA -- Officials with the Nuclear Regulatory Commission are asking TVA for more information on the utility's plan to keep floodwaters from disabling either Sequoyah or Watts Bar nuclear plants.

Officials with the Nuclear Regulatory Commission are asking TVA for more information about the utility’s plan to keep flood waters from disabling either Sequoyah or Watts Bar nuclear plants.

It has never happened. A wall of flood water so high that it topped dams on the upper Tennessee River and swamped emergency equipment at two nuclear plants just upriver of Chattanooga.

TVA will make its case next week to the Nuclear Regulatory Commission that the NRC should lower three white safety flags raised earlier this year at Browns Ferry Nuclear plant near Athens, Ala.

Three of Tennessee's five 2012 Green Development Awards and Grants are going to local cities or agencies.

A nuclear watchdog group is touting a memorandum sent by Bill Johnson -- TVA's soon-to-be new leader --as the smoking gun that should reopen the Duke-Progress energy merger that formed what is now the nation's largest utility company.

No matter how you pick your lottery numbers -- from the first digits you read in this morning's paper to the count of your dog's tail wags -- you still face tough odds to become tonight's Powerball winner of a cool half-billion dollars.

With more than 5,000 jobs created over the last three years at Volkswagen, Amazon and other Enterprise South-area businesses, city and county planners are looking to guide growth in the nearby community of Summit.

A man who chose the cheap way to tear down an old textile mill in East Chattanooga and exposed a neighborhood to asbestos will be allowed to appeal his four-year sentence on the taxpayers' dime — at least for now.

Sewanee biology professor David Haskell carefully has been researching Cumberland Plateau forests through one square meter of ground.

The Tennessee Wildlife Resources Agency this week formally outlawed four-wheeling in Aetna Mountain's Cummings Cove Wildlife Management Area.

Millions of people recycle at home and at work, but travel recycling has always been a challenge until now. Tennessee state agencies have joined the effort.

David G. Anderson, an archaeologist and professor at the University of Tennessee at Knoxville, is the speaker for today's final lecture in this year's Moccasin Bend Lecture Series.

Chattanooga has been called an environmental city, even in a time when some local leaders thought using the words "environment" and "sustainability" would drive away manufacturing.

A TVA decision to leave 500,000 cubic yards of spilled coal ash in the Clinch and Emory rivers near Kingston, Tenn., is drawing mixed reactions.

TVA is bringing the nuclear disaster warning sirens for Sequoyah Nuclear Plant into the 21st century.