tva logoTennessee Valley Authority

Putnam and Cumberland Counties, Tennessee

October 2012

Following the receipt of public input, TVA has identified a preferred location for a new transmission substation in western Cumberland County, Tennessee. The new Plateau 500-kilovolt Substation is needed to meet increasing power demand in east-central Tennessee.

The preferred location is alternative #3, located on Plateau Road, adjacent to existing TVA’s transmission lines (Monterey-Peavine 161-kV line and Roane-Wilson 500-kV line) and Volunteer Energy Cooperative’s Campbell Junction 161-kilovolt Substation.

The selected route is expected to have the least impact on the area, based on public input from an open house in July and additional evaluation of other factors, including cost, engineering and environmental impacts. The same considerations — environmental, land-use, engineering, and cultural — were used to assess each alternative. The reviews were based on available data, aerial photography, onsite reviews, public review and comment, and property owners’ input. A National Environmental Policy Act review is also pending.

The site would be 73 acres, affecting four property parcels. The location adjacent to existing transmission lines would allow all the lines connecting the new substation to the transmission system would be within the substation boundaries. No additional parcels would be affected.

The project is scheduled to be completed in June 2019.

Map

The map is a PDF file requiring Adobe Acrobat Reader. Use the zoom tool to view details of the map and allow time for it to reload. If you have questions or need help understanding the map, please contact TVA.

The map shows the preferred location for the proposed transmission substation.

Map  (PDF, 586 kb)


July 2011

TVA conducted a public scoping meeting on January 20, 2011 in Cookeville, Tennessee for public input on this proposed project. Following the comment period, TVA evaluated the potential environmental impacts and other important issues identified in the scoping process, as well as engineering and economic considerations. Option #2 - construction of a new 500-kV substation in western Cumberland County - was identified as the Preferred Solution.

TVA then held an open house on July 28, 2011 in Monterey, Tennessee to discuss the proposed substation project in western Cumberland County in more detail. A 30-day comment period followed the open house.

Map

The map is a PDF file requiring Adobe Acrobat Reader. Use the zoom tool to view details of the map and allow time for it to reload. If you have questions or need help understanding the map, please contact TVA.

The map shows the network of alternative locations and routes TVA is considering for the proposed transmission project.

Map  (PDF, 577 kb)


January 2011

Improve Power Supply Project

Due to increasing power demand in east-central Tennessee, improvements to the transmission system are needed for continued reliable power in Putnam and Cumberland Counties.

The population in Putnam and Cumberland Counties has grown at a rate of almost 1.8 percent per year since 2000.

TVA supplies bulk electric power to Cumberland and Putnam counties and surrounding areas in east-central Tennessee through an existing network of twenty six 161-kV substations and twenty eight 161-kV transmission lines.

  • Studies indicate that nineteen of these substations will not meet acceptable voltage criteria by 2019, and the remaining seven substations will be unable to meet criteria by 2022.
  • Five of the 161 kV transmission lines are expected to become overloaded by summer 2019, and eleven more lines are likely to be overloaded by summer 2022.

Either a 500 kV source or extensive upgrades to existing 161 kV facilities will be required in the Putnam County and Cumberland County area by 2019 to meet anticipated power loads.

Alternative Solutions

The range of alternatives TVA has identified for detailed evaluation includes no action and the three potential alternatives described below. As analyses proceed, one or more alternatives may be eliminated due to technical infeasibility, unacceptable environmental impacts, or unreasonably high economic costs. TVA expects to evaluate multiple sites for the new substation and various routing options for new transmission lines.

  1. Upgrade existing transmission lines in the area
  2. Construct a new 500-kV substation in western Cumberland County
  3. Construct a new 500-kV substation in Putnam County
  4. No action

1. Upgrade existing transmission equipment

  • This alternative would require replacing conductors (i.e., "wires") on approximately 54 miles of transmission lines.
  • Other upgrades, such as re-sagging and re-tensioning conductors and increasing structure height, would be performed on about 115 miles of transmission lines.
  • Extensive equipment upgrades would be required at eleven 161-kilovolt substations.
  • Work would be performed in eight east-central Tennessee counties: Cumberland, DeKalb, Putnam, Rhea, Roane, Smith, White and Wilson.

2. Construct a new 500-kV substation in western Cumberland County

  • This alternative involves the construction of a new 500-kV substation in western Cumberland County near the existing Campbell Junction 161-kV Substation. The new substation would require 60 to 80 acres.
  • Two new parallel 500-kV transmission line connections would be constructed on a 300-foot-wide right-of-way from the new substation to the TVA Roane-Wilson 500-kV Transmission Line. The new lines would be about 2-miles long.
  • Two new 161-kV transmission line connections on a double circuit line would be constructed on a 100-foot-wide right-of-way from the new 500-kV substation to the existing TVA Monterey-Peavine 161-kV Transmission Line. The new lines would likely be less than a mile long.
  • New substation equipment would be installed in the Monterey, Tennessee area.

3. Construct a new 500-kV substation in Putnam County

  • This option involves construction of a new 500-kV substation in Putnam County, southwest of Cookeville, on 60 to 80 acres.
  • Two new parallel 500-kV transmission line connections would be constructed on a 300-foot-wide right-of-way from the new substation to the TVA Roane-Wilson 500-kV Transmission Line. The new lines would be about 2-miles long.
  • Four new 161-kV transmission line connections would also be need, two each on 100-foot right-of-way. Two would be a double circuit line from the new 500-kV substation to the existing TVA Cordell Hull-West Cookeville 161-kV Transmission Line. The other two would be a double circuit line from the new 500-kV substation to the Gallatin West Cookeville 161-kV transmission line. About 7 to 10 miles of new right-of-way would be needed for these connections.
  • The West Cookeville South Cookeville 161-kV Transmission Line would be upgraded. And new equipment would be installed at the Jamestown 161-kV Substation in Fentress County, Tennessee and at the Monterey 161-kV Substation in Putnam County.

4. No action

  • No changes would be made to the existing transmission system.

Map

The map is a PDF file requiring Adobe Acrobat Reader. Use the zoom tool to view details of the map and allow time for it to reload. If you have questions or need help understanding the map, please contact TVA.

Study area for the project (PDF, 1.4 mb)

Enlargement of Option 2 (PDF, 348 kb)

Enlargement of Option 3 (PDF, 360 kb)


Environmental Review and Public Participation

TVA’s goal is to identify a solution that minimizes impacts to homeowners, property owners, existing environmental and historical features and planned development, while meeting the needs of the power system and keeping the overall project cost within reason.

TVA will prepare an environmental assessment (EA) or an environmental impact statement (EIS) to address the potential environmental effects of the construction, operation and maintenance of proposed new and upgraded power transmission facilities.

Additional environmental information can be found at http://www.tva.gov/environment/reports/putnam/.

Project Timeline

January 18, 2011 Issue the Notice of Intent for environmental review. Public scoping comment period begins (30 days)
January 20, 2011 Open house - public scoping meeting
February 22, 2011 Deadline for scoping comments
July 28, 2011 Open house for comments on alternative substation sites and transmission line routes
Fall 2011 Announce decision on a preferred site / route(s) for field studies
Fall 2011/Winter 2012 Issue draft EA; may hold open house for comments
June 2012 Complete field survey work
Fall 2013 Final EA document available; announce selected site and route
Fall/Winter 2013 Begin acquiring easements and property
Summer 2016 Begin construction
Summer 2019 Project in service

NOTE: Dates shown are estimates. During projects of this magnitude, unexpected issues may arise, resulting in the need to adjust the schedule.

Project Contact

More information on this project can be obtained from:

Chris Austin

1101 Market Street, MR 4G
Chattanooga, TN 37402-2801

(800) 362-4355 (toll-free)

newtransline@tva.gov

 

Environmental information

Kelly R. Baxter, NEPA Specialist

400 W. Summit Hill Drive, WT 11D
Knoxville, Tennessee 37902-1401

newtransline@tva.gov

           
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