Oak Ridge Today

TVA completes retaining wall, the largest of its kind, at Kingston ash spill

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Kingston Ash Spill Retaining Wall

KINGSTON—The Tennessee Valley Authority has achieved a significant milestone in its cleanup of the ash spill at the Kingston Fossil Plant—the completion of an earthquake-resistant, underground retaining wall around the containment cell at the recovery site.

The wall, which completely surrounds the 240-acre containment cell where recovered ash will be permanently stored, was completed on Feb. 20, almost a month ahead of schedule.

“I’m extremely proud of the project team for accomplishing this major undertaking,” said Bob Deacy, TVA senior vice president of projects. “They kept safety at the forefront and completed this significant milestone ahead of schedule.”

Construction of the wall began in summer 2011. Two high-capacity, long-reach hydraulic excavators dug trenches that were 4 feet wide and reached depths between 40 and 70 feet. More than 200,000 tons of cement and other materials were used to construct the wall, which is embedded 70 feet into the bedrock.

It is the largest wall of its kind in the U.S. at nearly 64,000 linear feet, the equivalent of 12 miles, and is designed to withstand a magnitude 6.0 earthquake. [Read more…]

TVA meets winter peak demand record

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KNOXVILLE—The Tennessee Valley Authority met a record-breaking winter demand for electricity Friday morning with an estimated 33,345 megawatts when the average temperature across the region hovered at 7 degrees.

This would be TVA’s highest demand for electricity since the summer of 2007 and third-highest in TVA history, a press release said. The previous winter record was 32,572 megawatts set on Jan. 16, 2009.

Meeting the record demand required the combined efforts of TVA’s employees and generating facilities, coordination with the Valley’s 155 local power companies and large industrial customers, and the cooperation of businesses and households to conserve, the press release said.

The release said TVA received 29 percent of its power from coal-fired plants, 21 percent from nuclear plants, 24 percent from natural gas plants, 12 percent from hydroelectric dams, 2 percent from wind farms, and 12 percent from power market purchases. [Read more…]

Frigid temps lead to high electrical demand; TVA asks for reduced consumption

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Frigid temperatures are causing high demand for electricity across the Southeastern United States, the Tennessee Valley Authority said Thursday.

As a result, TVA is asking all electric power consumers—including residential, commercial, and industrial customers—to voluntarily reduce their use of electricity until Friday afternoon.

“Any reductions in electricity use can help ensure a continued supply of power to essential services throughout TVA’s seven-state service territory and avoid interruptions of service,” the public utility said in a press release. “All available generating resources are being used to meet the peak power demand.” [Read more…]

TVA system meets single-day electricity record

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TVA Offices in Chattanooga

The Tennessee Valley Authority offices in Chattanooga are pictured above. (Photo courtesy TVA)

Tennessee Valley residents set a single-day record for electricity use while keeping warm during this week’s arctic cold wave, the Tennessee Valley Authority said Wednesday.

Homes and businesses across TVA’s seven-state region used 703 gigawatt-hours of electricity on Tuesday, the most ever for a 24-hour, one-day period. TVA’s previous record was 701 gigawatt-hours on Jan. 8, 2010.

This came one day after TVA had its fourth highest “energy day” ever on Monday with 678 gigawatt-hours.

The Valley’s average temperature Tuesday never got above 21 degrees, and the average was just 4 degrees that morning when TVA’s power system experienced its second highest winter peak power demand in the public utility’s history. [Read more…]

TVA power demand hits second-highest winter peak

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TVA Offices in Chattanooga

The Tennessee Valley Authority offices in Chattanooga are pictured above. (Photo courtesy TVA)

Power demand hit a peak of 32,460 megawatts at 9 a.m. Tuesday, the second-highest winter peak in Tennessee Valley Authority history.

The preliminary peak power demand occurred when the average temperature in the Tennessee Valley was a frigid 4 degrees, TVA said.

In a press release, the public utility said electricity use is now coming down. [Read more…]

TVA expects high electricity demand during cold wave

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TVA Offices in Chattanooga

The Tennessee Valley Authority offices in Chattanooga are pictured above. (Photo courtesy TVA)

The Tennessee Valley Authority expects plunging temperatures from an arctic cold wave moving across the region will produce high demand for electricity.

TVA’s bulk electric system remains secure and stable at this time, a press release said.

“TVA has been monitoring and carefully preparing for this blast of potentially record-cold weather since last week,” TVA Chief Operating Officer Chip Pardee said. “We have taken proactive measures so the system remains robust and reliable for our customers and power users across the Valley.” [Read more…]

Aisin auto casting announces $53.8 million expansion in Clinton

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An auto parts manufacturer in Clinton has announced a second major expansion, a $53.8 million investment expected to create 81 new jobs during the next two years.

The investment was announced Tuesday by Tennessee Economic and Community Development Commissioner Bill Hagerty and executives from Aisin Holdings of America Inc.

The company’s subsidiary in Clinton is called Aisin Automotive Casting Tennessee, and it’s located along Frank L. Diggs Drive south of State Route 61 and just west of Interstate 75. It’s the company’s second major business expansion since locating in Tennessee in 2004. [Read more…]

TVA retiring eight coal units at three plants

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Colbert Fossil Plant

The Tennessee Valley Authority is retiring all five coal units at the Colbert Fossil Plant on the Pickwick Reservoir on the Tennessee River in Alabama. (Photo courtesy TVA)

The Tennessee Valley Authority board of directors recently approved a plan that will retire eight coal units at three plants with more than 3,000 megawatts of combined generating capacity.

The retirements affect all five coal units at the Colbert Fossil Plant in Tuscumbia, Ala.; one of two operating coal units at Widows Creek Fossil Plant in Stevenson, Ala., and two of three coal units at the Paradise Fossil Plant near Central City, Ky. Paradise Unit 3, one of TVA’s largest coal units, will continue to operate.

A number of these units were already idled or scheduled for idling and/or retirement based on an agreement with the Environmental Protection Agency, TVA said in a press release. [Read more…]

TVA tax equivalent payments total $547 million in 2013

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Submitted

KNOXVILLE—The Tennessee Valley Authority provided $547 million in tax equivalent payments in fiscal year 2013 to states and local governments where it sells electricity or has power properties.

TVA pays tax equivalent payments annually in the eight states where it sells electricity or owns generating plants, transmission lines, substations and other assets, and directly to 146 local governments where TVA owns power facilities. [Read more…]

Children’s Museum reopens Waterworks Exhibit

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TVA Group Exhibit Display

Tennessee Valley Authority staff members, who designed graphics showing TVA’s role on the Tennessee River and displaying river safety information, join TVA board member Neil McBride, center, and others who helped renovate the exhibit. Laura Smith, with TVA, holds the plaque thanking TVA for its many contributions to the exhibit. (Submitted photos)

Children are once again splashing water as they send wooden tugboats down river in the TVA Waterworks Exhibit at the Children’s Museum of Oak Ridge. The exhibit recently reopened with some new additions that highlight learning through play.

In addition to operating small locks and dams in a flume donated by the Tennessee Valley Authority, children now may climb aboard a child-sized tugboat for an imaginary trip down the Tennessee River. After boarding, children may walk around the deck before entering the pilot house and crews’ quarters of the red, white, and blue tugboat, a small-scale replica of Ingram Marine Group’s working tugboats. [Read more…]

TVA’s Green Power Switch generates one million megawatt-hours of electricity

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TVA Ed Stephens and Buffalo Mountain Wind Farm

Ed Stephens, program manager for the Renewable Energy Program at the Tennessee Valley Authority, explains the 18 wind turbines at the Buffalo Mountain Wind Farm north of Oliver Springs.

WINDROCK MOUNTAIN—A Tennessee Valley Authority program that allows customers to buy electricity produced by renewable energy sources has generated about one million megawatt-hours—enough to power 68,000 homes, officials said Monday.

TVA considers the innovative Green Power Switch program, the first of its kind in the Southeast when it started 13 years ago, a success story. TVA said the program has helped prevent more than 700,000 tons of carbon dioxide from being emitted into the atmosphere. That’s equal to keeping about 135,000 cars off the road for a year.

And it’s grown from 2,000 customers in 2000 to roughly 12,000 today. That could be because customers today are more aware of environmental concerns and have a greater understanding of their power sources, said Patty West, director of TVA’s Renewable Energy Program. [Read more…]

TVA breaks all-time record for power generation from its dams

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Norris Dam

The Norris Dam in Anderson County can produce electricity for the Tennessee Valley Authority. (Photo courtesy TVA)

KNOXVILLE—More electricity was generated from the Tennessee Valley Authority’s 29 hydroelectric dams in fiscal year 2013, which ended Sept. 30, than in any other year in the agency’s 80-year history.

The dams provided 18.5 million megawatt-hours of clean, renewable energy, breaking the previous record set in 1973 by 122,000 MWh. That is enough electricity to serve more than 1.2 million homes in the TVA service area for an entire year.

Above-average rain and runoff fueled the increase in hydro generation. The Tennessee Valley received almost 62 inches of rainfall and almost 30 inches of runoff in fiscal 2013, which were 121 percent and 136 percent of normal, respectively. Runoff is the amount of rainfall that actually reaches streams and creeks, and eventually the Tennessee River, its tributaries, and TVA’s dams. [Read more…]