ML19254D705
| ML19254D705 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 10/12/1979 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| References | |
| NUDOCS 7910290363 | |
| Download: ML19254D705 (4) | |
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SD 7 3>8 Introduction This report describes the transmission lines that were constructed to the Sequoyah Nuclear Plant switchyard into the TVA trat.smission connect system due to the Sequoyah Nuclear Plant having been built at its present location. TVA utilized common or existing rights of way whenc.ier practical to reduce overall lar.d requirements.
In order to complete the switchyard tie-ins to the system, approximately 147 miles of new transmission lines were ccnstructed on 74, miles of new and 73 miles of existing rights of way.
Maintenance The mechanical mowing that is required is programmed on a four-year cycle.
Whenever the terrain is rough and inaccet Sible TVA uses chemical maintenance.
The chemical formulation is EPA approved a._d is environmentally acceptable.
The areas that are chemically treated are prograrmed on a six-to seven-year cycle. The lines are normally flown four times a year to de. tact any potential mechanical or erosion problems associated with the transnission lines.
Status of Transmission Lines The statue of the transmission lines are as follows:
Widows Creek-Charleston, Loop to Sequoyah 161-kV - The initial clearing and ccastruction activities were completed and the lines were put in service in August 1972. The right of say was mechanically mowed in April-May 1977 and is scheduled to be moved again in 1981. The right of way has a dense vegetative cover and we have not identified any erosion.
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Sequoyah-Watts Bar 161-kV Line and Sequoyah-Chickamauga 161-kV Line No. 1 -
The rightof way clearing and construction activities were completed and these liaes were put in service in September 1973. The right of way was mechanically mowed in 1976 and mechanical mowing will be programmed on a four-year cycle. The vegetation is well established and most of the right of way has dense stands of brush species. The right of ways have fully recovered from construction impacts and we have not identified any erosion problems.
Sequoyah-Chickamauga No. 2 and Sequoyah-East Cleveland 161-kV Lines
'The initial clearing and construction activities were completed and the lines were put in service in November 1973. The right of way was mechanically mowed in 1976 and mechanical moving will be programmed on a four-year cycle.
The right of way has a dense vegetative cover and we have not identified any erosion.
Sequoyan-Concord 161-kV Line - The right of way clearing and construction activities were completed and these lines were put in service in September 1972. The eight of way was mechanically cowed in 1977 and is scheduled for remowing in 1981. The right of ways,have fully recovered from construction impacts and we have not identified any erosion problems.
Sequoyah-Charleston No. 2 161-kV Line - This connection was provided by installing conductors on the vacant side of the existing Sequoyah-Charleston No. 1 161-kV transmission line. This line was placed in service in April 1974. The right of way was mechanically moved in March-April 1976, and is re-scheduled to be towed in the summer of 1980. The right of way has a dense vegetative cover and we have not ident.ied any erosion problems.
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Sequoyah-Franklin (AEDC) 500-kV Line - The initial clearing bega in June 1973; construction was completed and the.line was put in service October 1975.
Sectioas of the right of way were mechanically mowed in late 1978.
This line required approximately 45 miles of new right of way and has approximately 602 acres of wooded right of way that r2 quires maintenance and approximately 118 acres of the 602 acres consists of rough, inaccessible terrain that requires chemical application.
In 1979, the 118 acres were sprayed by helicopter. The chemical formulation used was two gallons of Tordon 101 plus two gallons of D9, an amine formulation. This chemical combination is EPA approved and.is environmentally acccptable.
The sections of C..- right of way that are mechanically moweu will be pro-grammed on four-year cycles. The areas that are sprayed by helicopter will be program =ed on a six-to seven-year cycle. The right of way has fully recovered from the construction impacts and we have not identified any erosion problems.
Sequoyah-Georgia State Line (Bowen) 500-kV Line - This transmission line required 21.4 miles of new right of way.
The initial clearing began in 1971; construction was comple'.ed and the line was put in service April 1972.
The right of way has full: recovered from construction impacts and we have not identified any erosion problems. The right of way was mechanically mowed in 1976 and mechanical mowing will be programmed on a four-year cycle.
Widows Creek-Bull Run Loop to Sequoyah.500 kV - The initial clearing and construction activities were completed and this loop was placed in
- rvice in April ?.972.
The right of way was mechanically mowed in June 19..,
and is rescheduled to be mowed again in the summer of 1981. The right of ways have fully recovered from construction impacts and we have not identified any erosion problems.
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Conclusions, All construction of new lines has been completed and full redress and recovery from construction impacts has been achieved. The vegetation on the rights of way consists of grass seeded areas, volunteer vegetation, and/or dense stands of brush species. The lines associated with the Sequoyah Nuclear Plant were last flown the week of October 9-12, 1979. TVA has not identified any erosion problems associated with the transmission lines.
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