Power Supply Upgrade
TVA has evaluated several options for a new transmission line designed to improve electric reliability by providing a third connection between the Union and Tupelo Substations. The additional line would relieve electrical load on the two other lines and prevent them from becoming overloaded during times of heavy power use, and support TVA's Clean Air Initiative.
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.
Based on these evaluations, TVA has identified alternative route segments 4, 7, 11, 13, 14 and 15 as the preferred route (see map). About two-thirds of the new line would use existing right of way or parallel existing lines.
The 16 miles of new transmission line would extend from the Union 500-kV Substation to the Turner Park 161-kV Substation, located in the Turner Industrial Park. The existing 6.6 mile Tupelo-Turner Park Transmission Line would be used to complete the connection from Union to Tupelo.
The line would be built on steel poles. The proposed structures shown at the open house consisted of two steel poles with a single-circuit transmission line configuration. A different structure type would be used for construction, consisting of two taller poles that would allow for two transmission lines while keeping the same right of way width. This structure change would minimize overall construction impacts to private property, as well as reduce cost and time when power supply improvements are needed in the Guntown area.
The project is scheduled to be completed in summer 2016.
TVA is considering improvements to the transmission system in Union and Lee Counties, Mississippi. The proposed project includes 12-15 miles of new transmission line.
The new transmission line is needed to improve the electric reliability of the area by providing an additional connection between two substations. The additional connection would relieve possible overloading on existing lines.
TVA held an open house on September 13, 2012 to provide information, answer questions and accept comments about the proposed project.
The proposed project consists of a new 161-kilovolt (kV) transmission line, which would create a third connection between the Union 500-kV Substation and the Tupelo 161-kV Substation. The Union Substation is located north of Highway 78 near Sherman, Mississippi. The Tupelo Substation is located near the intersection of Highways 278 and 45.
The new Union-Tupelo No. 3 line would consist of both new and existing transmission right-of-way.
- The 16 miles of new transmission line would extend from the Union 500-kV Substation to the Turner Park 161-kV Substation, located in the Turner Industrial Park near the intersection of Highway 45 and Natchez Trace Parkway.
- The existing 6.6 mile Tupelo-Turner Park Transmission Line would be used to complete the connection to the Tupelo Substation.
TVA considered several possible line routes. The proposed line would consist of steel pole structures centered on a new 100-foot-wide right-of-way. However, some of the possible routes under consideration share right of way with existing lines.
The project is schedule for construction to begin summer 2015 and be in service by summer 2016.
TVA's process for locating new transmission projects is designed to allow public input at all stages. TVA is committed to working with area stakeholders to address concerns during the course of the project. Comments received during the comment period will be used in reaching a decision on the proposed action.
TVA held an informal open house to discuss the proposed transmission line project on September 13, 2012. TVA representatives were available to provide information, answer questions and accept comments. A 30-day comment period followed the open house.
The green line shows the preferred route and the red lines are the alternative routes. Maps are also available below as PDF files.
Preferred route (PDF, 668 Kb)
Possible routes of proposed transmission line (PDF, 1.3 mb)
If you have questions or need help understanding the map, please contact TVA.
The appropriate National Environmental Policy Act review will be conducted to ensure that the environmental impacts are minimized. TVA attempts to minimize any land requirements, private property impacts, and environmental impacts associated with this project.
|Open house||September 13, 2012|
|Comments accepted||Through October 15, 2012|
|Determine preferred route||Spring 2013|
|Field surveys||Spring 2013|
|Environmental surveys||August 2013|
|Construction begins||Summer 2015|
|Project in service||June 2016|