TRANSMISSION SERVICE FACILITIES STUDY OASIS 1658088 · 2009. 10. 21. · SEL421 relay for primary and an SEL311C relay for backup protection. Settings will need to be derived for

TRANSMISSION LINE & SUBSTATION PROJECTS

COMPANY: ENTERGY SERVICES, INC.

CUSTOMER: SOUTHERN MISSISSIPPI ELECTRIC POWER ASSOC.

FACILITIES STUDY EJO # F4PPMS0235

ICTT-2009-068

TRANSMISSION SERVICE FACILITIES STUDY

OASIS 1658088

REVISION: 0

Rev Issue Date Description of Revision Prepared

By Approved

By

A 09/22/09 Shell for team members input Ibrahim Khan Charles Newell

B 09/29/09 Finalized for JET vote Ibrahim Khan Charles Newell

C 10/01/09 Submitted to TPD Ibrahim Khan Charles Newell

D 10/16/09 TPD Review Rick Bewley Brian Warwick

0 10/21/09 ICT Determines Upgrade Classification English Cook Jody

Holland

OASIS 1658088 SMEPA Facilities Study

TABLE OF CONTENTS

1. PROJECT SUMMARY ........................................................................3 1.1. Background and Project Need............................................................................... 3 1.2. Scope Summary.................................................................................................... 3 1.3. Cost Summary....................................................................................................... 5 1.4. Schedule Summary ............................................................................................... 5

2. SAFETY REQUIREMENTS & GENERAL ASSUMPTIONS ...............5 3. SCOPE OF WORK..............................................................................6

3.1. Transmission Substations ..................................................................................... 6 3.1.1 Brookhaven 115 kV: ..................................................................................... 6 3.1.2 Byram Substation – add line breaker: .......................................................... 6 3.1.3 Ray Braswell 115kV Substation: .................................................................. 8 3.1.4 Spring Ridge 115kV Substation: .................................................................. 9

3.2. Transmission Lines ............................................................................................. 11 3.2.1 Ray Braswell to Byram: Build New 115kV Transmission Line.................... 11 3.2.2 Byram to Terry: Rebuild Existing 115kV Transmission Line....................... 13 3.2.3 East Vicksburg to Waterway Existing 115kV Transmission Line................ 14 3.2.4 Florence to Florence Switching Station line upgrade ................................. 15 3.2.5 Brookhaven to Mallalieu line upgrade ........................................................ 15

4. COST.................................................................................................16 5. SCHEDULE.......................................................................................17 6. RISK ASSESSMENT ........................................................................18 7. CONFIRMED RESERVATIONS........................................................19 8. PRE-888 TRANSACTIONS...............................................................23 9. STUDY QUEUE.................................................................................24 10. ATTACHMENTS ...............................................................................24

A. Table of Acronyms ..................................................................................... 24 B. Drawings: ................................................................................................... 24

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1. PROJECT SUMMARY

1.1. Background and Project Need

The purpose of this Facilities Study is to determine the availability of transfer capability across Entergy’s transmission system from Entergy (EES) to Entergy (EES), to evaluate the SMEPA request for 21MW of yearly network transmission service (under SMEPA’s TS-1 rate). The time period for this transfer is from 6/1/2012 until 6/1/2042. The direction of the transaction is EES to EES. This study was performed on the latest available 2012 – 2018 summer and winter peak seasonal models, using PSS/E and MUST software by Power Technologies Incorporated (PTI).

The Facilities Study identifies any transmission constraints resulting from the requested power transfer. The Facilities Study also includes cost estimates to correct any transmission constraints.

1.2. Scope Summary

The Facilities Study has identified some transmission constraints. The constraints can be addressed in the following manner:

1.2.1 2009-2011 Approved Entergy Construction Plan Projects

The following projects are approved in the 2009-2011 Entergy Construction Plan and have expected in-service dates prior to the start of this transmission service. These projects are required to be in-service prior to the start of this transmission service. • Ray Braswell/Baxter Wilson Equipment Upgrades – 2010 Expected ISD • South Jackson-Florence 115kV Line Upgrade – 2011 Expected ISD • Morton 115kV Switches Upgrade – 2011 Expected ISD • Split Sterlington 115kV Bus & place 3rd auto in-service – 2012 Expected ISD If these proposed upgrades are withdrawn, this customer may be responsible for these upgrades. In addition, financial payments may be required for the use of these upgrades.

1.2.2 Build a 230kV transmission line between Loblolly and Hammond

230kV substation

The Sorrento-Vignes 230kV transmission line overloads for the loss of the Bogalusa 500/230kV autotransformer. This constraint will be alleviated by the Loblolly-Hammond 230kV new line project. This project is in the 2009-2011 Entergy Construction Plan and has an expected in-service date of June 2013. Transmission service cannot be granted until this upgrade has been completed.

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1.2.3 Upgrade the Waterways-East Vicksburg Switching Station 115kV

transmission line

The Waterways-East Vicksburg Switching Station 115kV transmission line overloads for the loss of the Ray Braswell-Baxter Wilson 500kV transmission line. It is required that the Waterways-East Vicksburg Switching Station 115kV transmission line (3.15 miles) be upgraded from a capacity of 161MVA to at least 180MVA. This project is included in the 2009 ICT Base Plan.

1.2.4 Build a 115kV transmission line between the Ray Braswell and Byram substations

The Ray Braswell-Jackson Forest Hill 115kV transmission line overloads for the loss of the Jackson South 230/115kV autotransformer and the Ray Braswell-West Jackson-South Jackson 115kV transmission line. This constraint can be alleviated by the building a new 115kV transmission line between Ray Braswell and Byram. This project will include the installation of a new line bay and breaker at Byram 115kV substation and installation of a new line bay at Spring Ridge Road 115kV substation. The Ray Braswell-Byram 115kV new line project has been proposed in the 2009-2011 Entergy Construction Plan and has an expected in-service date of 2012. This is constrained by ROW and CCN processes and the completion date can not be accelerated. This project is in the 2009 ICT Base Plan.

1.2.5 Upgrade the Florence-Florence Switching Station 115kV transmission line

The Florence-Florence Switching Station 115kV transmission line overloads for the loss of the Bogalusa-Franklin 500kV transmission line or the Bogalusa 500/230kV autotransformer. The Florence-Florence Switching Station 115kV transmission line has a 666 ACSR conductor. The existing conductor is to be replaced with 1272 ACSR “Bittern”. 1.2.6 Upgrade the Brookhaven-Mallalieu SW Station 115kV transmission

line

The Brookhaven-Mallalieu 115kV transmission line overloads for the loss of the Bogalusa-Franklin 500kV transmission line or the Bogalusa 500/230kV autotransformer. It is required that the Brookhaven-Mallalieu 115kV transmission line be upgraded from a capacity of 199MVA to at least 210MVA. The transfer air break switch J8131 at Brookhaven, rated at 600A, needs to be upgraded to 1200A. This project is in the 2009 ICT Base Plan.

1.2.7 Summary of work to be done under OASIS 1658088

• Upgrade line rating between East Vicksburg and Waterways Switching Station

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• Build new 115kV line between Ray Braswell and Byram Substations • Upgrade line rating of line between Florence and Florence Switching Station • Upgrade line rating of line between Brookhaven and Mallalieu Switching

Station 1.3. Cost Summary

The estimated total project cost is $50,500,000. This cost does not include Tax Gross Up which may apply. Please note these are 2009 dollars and do not include tax gross-up of 26.99% if and where applicable The ICT has assigned $47,800,000 as Base Plan upgrades and $2,700,000 as Supplemental Upgrades based on Attachment T of Entergy’s Open Access Transmission Tariff (“OATT”).

1.4. Schedule Summary

The requested in-service date is June 1, 2012. The duration of work scoped and estimated below is 38 months starting from November 2009 and is expected to be completed by December 2013. This date is constrained by acquisition of ROW to construct new line between Ray Braswell and Byram and is unlikely to be completed any sooner. All other work is estimated to be completed by June 1, 2012.

2. SAFETY REQUIREMENTS & GENERAL ASSUMPTIONS

Safety: Safety is a priority with Entergy. Safety will be designed into substations and lines. The designs will be done with the utmost safety for personnel in mind for construction, operation, and maintenance of the equipment. All employees working directly or indirectly for Entergy shall adhere to all rules and regulations outlined within the Entergy Safety manual. Entergy requires safety to be the highest priority for all projects. All Entergy and Contract employees must follow all applicable safe work procedures. General Assumptions:

• Sufficient time will be allowed in approving the project enabling Entergy to prepare a Project Execution Plan and be able to complete the project as per schedule described below. Use of Facilities Study and estimates is not favored to commence an approved project.

• Assumptions have been made in developing estimates without performing site visits, surveys, and soil borings. During Project Execution Plan, these tasks will be completed and could have an impact on estimates and schedule.

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• All costs above represent good faith estimates in today’s dollars and are based on existing data and could change considerably after development of detailed execution plan. Price escalation for work in future years has not been included.

3. SCOPE OF WORK

3.1. Transmission Substations

3.1.1 Brookhaven 115kV:

General: Requirement: Replace transfer bus disconnect switch J8131: it is currently rated for 600A and will be replaced with a 1200A switch. Finding: Through a field visit, Construction has confirmed that the switch is rated for 1200A and most likely it was replaced in the past as part of another project. Therefore, no work is required.

3.1.2 Byram Substation – add line breaker: General: Install one 115kV line bay at Byram 115kV substation. The new bay will be installed adjacent to the existing Brookhaven-Terry line bay on the south end of the station. The Brookhaven-Terry line will be relocated to the new bay as shown on station one-line M3150S05 (see Attachment). The new line to Spring Ridge Road- Ray Braswell will be terminated in the existing Brookhaven-Terry line bay. Site:

There will be limited site work required to complete the addition to the substation. The only site work necessary will be replacing limestone removed to during the installation of the new foundations. Foundations: Install the following foundations: • One (1) 115kV breaker foundation • Three (3) 115kV switch support foundations • One (1) “E” tower foundation • One (1) AX2E tower foundation • Install conduit from the existing cable trough to the CVT, junction box, line

tuner, and breaker in the new bay. The fiber will be installed in the existing conduit.

• Install copperweld ground leads to the new equipment and structures.

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Electrical: The following material will be installed in the new line bay: • One (1) 115kV breaker • Three (3) 115kV 2000A switches, including one with ground • Three (3) “CE” switch structures • One (1) AX2E tower without shield • One (1) CVT support structure • Three (3) surge arresters • Twenty-seven (27) insulators • One (1) lot of buswork • The line trap and line tuner will be relocated from the existing

Brookhaven/Terry bay to the new bay and replaced with strung bus. • There is sufficient shielding over the new line bay. Relay: Ray Braswell Line Bay (Existing Brookhaven bay): • Install one (1) line relay panel 28”. The panel will use an SEL421 for primary

digital and an SEL311-C for digital backup step distance protection. Brookhaven Line Bay (New bay): • Rework existing Brookhaven line panel. • Install one (1) CVT on the A phase with junction box • Relocate one (1) line trap and tuner Existing operation bus panel differential scheme rework (replace existing relaying with a SEL487B)

Miscellaneous Control House Equipment: • Install one (1) Coastcom communications channel bank • Install one (1) lot of communications equipment (Mux, Splice Box and

Coastcom Rack to connect SCADANET and line protection) • Install one (1) fiber optic ADSS cable from deadend tower into control house • AC and DC panels are adequate • Install one (1) S and one (1) K cards with accessories in the RTU • The existing GE Harris D20 RTU will require a configuration package • Install one (1) Orion communications processor with GPS SEL 2407 • Install one (1) lot of control cable • Install one (1) lot of shielded control cable Relay Settings: Ray Braswell Line Bay (Existing Brookhaven bay): • Settings will need to be derived for one Entergy standard line panel using an

SEL421 relay for primary and an SEL311C relay for backup protection. Settings will need to be derived for an Entergy standard bus differential panel using an SEL487B relay. Settings will need to be reviewed for Southwest Jackson to Byram and Brookhaven to Byram.

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Communications and SCADA: • Install one (1) S and one (1) K card with accessories in the RTU • The existing GE Harris D20 RTU will require a configuration package • Install one (1) lot of communications equipment (Mux, Splice Box and

Coastcom Rack to connect SCADANET and line protection) • Use existing voice and data circuits Metering: • N/A

3.1.3 Ray Braswell 115kV Substation: General: • The overall design goal for this station is to provide a 115kV source line to

Byram Substation using the existing radial 115kV line to Spring Ridge Rd substation. The existing 115 kV station is configured in a ring bus scheme. The existing Spring Ridge Road line is on one of the nodes of the 115kV ring bus as shown on station oneline M4298S05 (see Attachment) and electrical arrangement M4298EA2 (see Attachment). To facilitate the installation of fiber optic into the Ray Braswell 115kV yard for the new transmission line to Byram, OPGW will terminate at the 230 yard deadend tower and be brought into the control house via ADSS cable. The existing Spring Ridge Road line will have fiber communication installed to the line bay and brought into the control house via ADSS cable. The fiber (OPGW or ADSS, see issue below) will cross the road to the Spring Ridge Road Substation. This will allow Spring Ridge Road Substation to initiate breaker failure trips to Ray Braswell via this communication.

• Foundation and electrical work is required to install a CVT and junction box on the Spring Ridge Road line bay, and install conduit for the two new fiber optic cable runs (115kV yard & 230kV yard) to the control house. Relay, settings, and commissioning work for the new line will be coordinated with the work at the Byram Substation.

• Several issues were investigated and confirmed as follows to develop the design: o Tline design and TelCom confirmed that there is adequate clearance to

install a fiber optic line into Spring Ridge Rd substation.

Site: • No site work required

Foundations: • Install one (1) CVT pedestal foundation • Install one (1) lot of conduit

Electrical: • Install one (1) CVT and pedestal on the A phase • Install one (1) CVT junction box

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Relay:

Byram Line (Existing Spring Ridge bay) • Install one (1) line relay panel 28”. The panel will use an SEL421 for primary

digital and an SEL311-C for digital backup step distance protection. • Install one (1) CVT on the A phase with junction box

Control House Equipment: • Install one (1) Coastcom communications channel bank • Install one (1) lot of communications equipment (Mux, Splice Box and

Coastcom Rack to connect to SCADANET and line protection) • Install two (2) fiber optic ADSS cables from deadend tower into control house • AC and DC panels are adequate • Install one (1) S and one (1) K card with accessories to the RTU • A GE Harris D20 RTU will require a configuration package • Install two (2) SEL2505 I/O to Spring Ridge Rd • Install one (1) Orion communications processor with GPS SEL 2407 • Install one (1) lot control cable • Install one (1) lot shielded control cable

Relay Settings:

Byram Line (Existing Spring Ridge bay): • Settings will need to be derived for one Entergy standard line panel using an

SEL421 relay for primary and an SEL311C relay for backup protection. Settings will need to be reviewed for Vicksburg to Ray Braswell, South Jackson to Ray Braswell, Rex Brown to Ray Braswell and Southwest Jackson to Ray Braswell.

Communications and SCADA: • Install one (1) S and one (1) K card with accessories in the RTU • The existing GE Harris D20 RTU will require a configuration package • Install one (1) lot of communications equipment (Mux, Splice Box and

Coastcom Rack to connect SCADANET and line protection) • Use existing voice and data circuits Metering: • N/A

3.1.4 Spring Ridge 115kV Substation: General: • Install line bay and extend the operating bus as shown on station one line

M4298SO5 and electrical arrangement M4298EA2 (see Attachments). The station will expand by 16' feet on the south side.

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Site: • The site will be expanded by 16 ft to the south. Assuming the top 6” of topsoil

will be stripped and 2 feet of fill will be required to grade the site to the appropriate elevations, the following materials will be needed: o 70 cubic yards stripping of topsoil o 280 cubic yards of fill o 130 tons of limestone o 224 feet of new fence o 192 feet of existing fence removal

Foundations: • Install the following foundations:

o Six (6) 115kV low bus support foundations o One (1) high elevation switch support foundation o One (1) full tension deadend tower foundation

Electrical: • The following material is required:

o One (1) 115kV disconnect switch with ground blade o Three (3 ) surge arresters o One (1) AX2E tower o One (1) switch structure, type “CE” o Six (6) low bus supports o Three (3) arrester support structures o One (1) lot of insulators and buswork

Relay: Ray Braswell Line (Existing bay) Control House Equipment: • Install one (1) fiber optic ADSS from dead end tower into control house. • AC and DC panels are adequate • Install two (2) SEL2505 I/O to Ray Braswell • Install one (1) fiber splice tray and junction box • Install one (1) lot control cable • Install one (1) lot shielded control cable Relay Settings: • No relay settings revision will be required. Communications and SCADA: • Add alarms for new equipment • Install one (1) lot of communications equipment (SEL2505, Splice Box and

Com Rack to connect line protection) Metering: • N/A

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3.2. Transmission Lines

3.2.1 Ray Braswell to Byram: Build New 115kV Transmission Line General: Planning has identified the need for a new transmission line to be located in Hinds County, Mississippi. The line will run from the Ray Braswell station to the Byram substation. Initially the line will be energized at 115kV, but future plans for converting most of the line to 230kV will require that portion of the line be built to 230kV standards. The ultimate configuration from planning calls for a new 230kV line originating at the Ray Braswell station, then routing to a new substation to be sited on existing Entergy property located near the intersection of Palestine Rd. and Midway Rd. (proposed name Midway), then to a new substation which will be located in a future industrial park to be developed near the intersection of Wynndale Rd. and I-55 (proposed name Wynndale). From the future Wynndale site, a new 115kV line will be required from Wynndale to Byram. The total distance from Ray Braswell, past Midway, to the proposed Wynndale site which comprises the single circuit 230kV construction portion is 22.2 miles. The length between Wynndale and Byram which comprises the double circuit 115kV portion is 4.5 miles, thus the total length of new construction is 26.7 miles. In the initial configuration, a single circuit line, framed for 230kV, will be built from the 115kV Springridge Rd substation (located across the road from Ray Braswell) routing southerly to (near) the future Midway substation, then routing southeasterly to a point slightly south of the new proposed Wynndale site. At this point, the new line will intersect with the existing 115kV Terry to Byram line. From the intersection point north to Byram, the existing 115kV line will be reconstructed as a double circuit line with the new line from Ray Braswell (Springridge). The double circuit structures that are south of the future Wynndale site will be framed for double circuit 230kV. North of the Wynndale site to Byram, the structures will be framed for double circuit 115kV (161kV). The existing 666 24/7 ACSR conductor and the existing OPGW on the Brookhaven line will be moved to the new single pole structures. The initial design and construction will allow for the future conversion to 230kV. In the future, the north end of the line will be disconnected from the Springridge station and reconnected to the 230kV yard at Ray Braswell. A deadend structure in line with the 230kV yard will be provided in the initial design / construction that will facilitate the future connection to an open 230kV bay. A deadend structure will also be provided on the south end near the future Wynndale site to allow for future termination of the 230kV line into Wynndale. Exact detail and placement of the deadends will be determined during the detail line design. The proposed route is as follows: The line will begin at the Springridge 115kV station and route to the south underneath the existing circuits that go into Ray Braswell. Just past the Entergy service center, the line will turn to the west and route around the center and meet with the 500kV Ray Braswell – Franklin line near structure #1. From that point, the line will run parallel to and on the east

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side of the 500kV line until it intersects with Palestine Road (approximately 10.7 miles). The line will then route east down Palestine Road for 1.7 miles until the intersection with a gas pipeline. At this point, the line will turn to the south and parallel the gas line on the east side for a distance of 0.8 miles. The line will then turn to the east and run in a southeasterly direction cross country for a distance of approximately 8 miles crossing I-55 and intersect the existing Brookhaven line. From the intersection point, the line will route to the north to Byram (approximately 4.5 miles). The proposed route is our best estimation and should provide an adequate scope and cost estimate. Final routing of the line may need to vary slightly depending on ROW availability. The route includes approximately 13 miles of heavily wooded areas that will require clearing. The line will be built using 1272 ACSR “Bittern” conductor and polymer braced post and deadend insulators. Single column steel and several three pole steel structures are included in the estimate. Tangents structures will be self supporting, direct embedded. Angle structures will be guyed and direct embedded where possible. Deadends and angles that cannot be guyed will be self supported on drilled pier foundations. Shielding for the line up to Wynndale will be provided by a single 24 fiber OPGW (GW2400). The new fiber will continue on one side of the double circuit part to Byram with the existing fiber which will be relocated on the other side. It is not anticipated that vibratory piles will be required for this route and none are included in the estimate. Seventeen miles of new 100’ wide ROW (206 acres) are required. Right of Way requirements are as follows: The first 12 spans (1 mile) will be built on existing Entergy property in front of and adjacent to the Ray Braswell station and Entergy training center. The next 4.2 miles will be built on open existing Entergy ROW parallel to the Ray Braswell to Franklin 500kV line. From that point to the intersection of the 500kV line and Palestine Rd (6.5 miles), new 100 ft wide ROW will be required adjacent to the existing 500kV ROW. From the intersection of the 500kV line and Palestine Rd. to the intersection of the new line with the existing 115kV line from Brookhaven (10.5 miles), the ROW width required is 100 feet. The new double circuit portion from the intersection point to Byram will be constructed in existing Entergy ROW. Summary:

Dist.

(mi)

Description Construction Type ROW Requirement

1 Spring Ridge Sub to 500kV Corridor Single Cir 230kV Existing Land

4.2 Parallel to 500kV Corridor Single Cir 230kV Existing ROW

6.5 Parallel to 500kV Corridor Single Cir 230kV New 100’ ROW

1.7 Parallel to Palestine Rd. Single Cir 230kV New 100’ ROW

0.8 Parallel to Pipeline Single Cir 230kV New 100’ ROW

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8 Cross Country Single Cir 230kV New 100’ ROW

4.5 Brookhaven - Byram Corridor Dbl Circuit 230/115 Existing ROW

Structures and Foundations: • Steel self supporting and guyed. New line – 191 direct embedded, 34 drilled

pier. Existing rebuild – 31 direct embedded, 12 drilled pier. No piles. Conductor and Insulators: • Single 1272 ACSR “Bittern” - 325,000 lbs. • Polymer braced post and deadend Insulators. 940 Insulators new line; 174

insulators existing rebuild. Shield Wire: • 24 fiber OPGW - 147,000 ft. • Exact locations of splice boxes to be determined during detail design. Construction Plan and Outages: • Outage will be required for the 4.5 mile section from Wynndale to Byram.

3.2.2 Byram to Terry: Rebuild Existing 115kV Transmission Line General: • See general notes from section 3.2.1. Structures and Foundations: • Steel self supporting and guyed. Rebuild – 31 direct embedded, 12 drilled

pier. No piles. Conductor and Insulators: • Reuse existing 666 ACSR “Flamingo” conductor. • Polymer braced post and deadend insulators. Install 174 new insulators. Shield Wire: • Reconnect existing OPGW to the new structures. • Any existing splice boxes will be moved to the new structures.

Relay and Settings Work: • Settings will need to be reviewed and possibly revised for the Byram to

Brookhaven line panel and Brookhaven to Byram line panel due to the re-conductor of the Byram to Terry line section.

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Material: • Relating to Ray Braswell to Byram and associated substation work:

Quantity Material Description Lead Time, weeks (ARO)*

SUBSTATION:

1 115kV breaker, 2000A, 40kA 22 4 115kV disconnect switch 16 6 115kV surge arresters 14 1 lot Steel structures 16 1 lot 115kV insulators 14 1 lot Buswork 16

TRANSMISSION LINE:

225 Steel poles 20 940 Insulators 16 625,000 lbs. Conductor 1272 ACSR “Bittern” 18

147,000ft GW2400 OPGW 18 *As of 10/16/09

Construction Plan and Outages: Outage will be required for the 4.5 mile section from Wynndale to Byram.

3.2.3 East Vicksburg to Waterway Existing 115kV Transmission Line General: Upgrade line rating of 3.15 miles of line from 161MVA to 180MVA. Design Considerations: Remove approximately 30 existing wood H-structures and install approximately 30 single pole structures. Replace existing conductors by 1272 ACSR “Bittern” and OPGW for shield wire. Relay and Settings Work: Revise line relay settings at both ends of the line Construction Plan and Outages: An outage will be required for the 3.15 miles of line between East Vicksburg and Waterway.

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3.2.4 Florence to Florence Switching Station line upgrade General: Replace existing 666 ACSR conductors by 1272 ACSR Bittern. The replacement is planned as part of reliability project and is scheduled to be completed by March 1, 2011. Design Considerations: Remove approximately 31 existing wood H-structures and install approximately 31 single pole structures. Replace existing conductors by 1272 ACSR “Bittern” and OPGW for shield wire. Relay and Settings Work: Revise line relay settings at both ends of the line Construction Plan and Outages: The construction and outages have been planned as part of reliability project and is scheduled to be completed by March 1, 2011.

3.2.5 Brookhaven to Mallalieu line upgrade General: Upgrade rating from 199MVA to 210MVA. Design Considerations: The difference in sag between the 80°C and 100°C is only about 1’ for a 600' span in a 600’ ruling span. If this sag is the case, it is anticipated that no modifications will be needed to maintain acceptable clearances. However, because some spans are close to being inadequate the recommendation is to raise six structures. Better definition will be needed and this estimate will be modified during further scoping and design if the project progresses. Running the existing line to 100°C will provide 1088 amps (based on Southwire's latest model data), or about 216MVA. Relay and Settings Work: No setting changes will be required. Construction Plan and Outages: If structures are changed out or raised, then an outage will be required from the Brookhaven to Mallalieu line.

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4. COST

The ICT has reviewed and determined whether each required upgrade will be considered a Base Plan Upgrade or a Supplemental Upgrade. For more information on cost responsibility for Base Plan and Supplemental Upgrades, see Attachment T to Entergy’s OATT. The costs shown in the table includes overheads and AFUDC, but do not include tax gross up. Entergy incurs a tax liability proportional to the amount of customer contributions. In addition to proposed project costs, the customer may be charged a “Tax gross-up” at applicable rates. Rates are subject to change. Current rate for Mississippi is 26.99% and is not included in any of the estimates.

Cost Analysis

*Projected Costs include indirect cost in 2009 dollars

Entergy’s Scope of Work as Listed in Section 1.2 Total * Base Plan

Supplemental Reference Ray Braswell 500kV Substation+ $0 1.2.1 Baxter Wilson 500kV Substation+ $0 1.2.1 South Jackson to Florence T/L+ $0 1.2.1 Morton Switch replacement+ $0 1.2.1 Sterlington bus split+ $0 1.2.1 Loblolly-Hammond 230kV Project + $0 1.2.2

Waterways-East Vicksburg SS 115kV T/L $2,100,000 $2,100,000

3.2.3

Byram Substation $1,000,000 $1,000,000

3.1.2

Ray Braswell 115 kV Substation $500,000 $500,000

3.1.3

Spring Ridge Substation $500,000 $500,000

3.1.4

Ray Braswell - Byram 115kV T/L $38,300,000 $38,300,000 3.2.1

Terry – Byram T/L $5,000,000 $5,000,000 3.2.2

Florence - Florence SS 115kV T/L $2,700,000

$2,700,000 32.4

Brookhaven - Mallalieu SS 115kV T/L

$400,000

$400,000 3.2.5 Total $50,500,000 $47,800,000 $2,700,000

+ Approved project included in 2009 – 2011 Entergy construction plan

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5. SCHEDULE

1) Definition phase and development of PEP/Estimates – 5 months starting from November 2009

During this phase a detailed project execution plan and estimates will be prepared. It will be based on assumptions as the soil boring, survey, property acquisition information, etc would not be available. This work will be done subsequent to approval of funding in design phase. A detailed schedule will be prepared identifying various activities to be completed during design, construction and closeout phases. Allow 1 month for FP approvals and 1 month for WO development.

2) ROW acquisition, survey, soil borings, permitting: 24 months

After approval to proceed with an approved FP, work will commence to secure ROW for new lines and with owner consent to enter the property, survey and soil borings will be completed. Also, environmental permitting work will be undertaken.

3) Design and procurement: 7 months

During this phase all design will be completed and material ordered.

4) Substation Construction: 6 months after the issue of design and receipt of equipment

5) Line Construction: 8 months from the issuance of design provided outages are

granted The above durations are mostly applicable for the new line to Byram related work and present determination is that it would be completed by December 2013. Main reason is the constraint for securing ROW. Otherwise, all other elements could be built by June 2012.

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6. RISK ASSESSMENT

Risk Comment Impact

Material costs steel & Equipment

Rising steel, copper, fuel and other market conditions could greatly affect estimated cost. ****

Storm-water plan implementation

Best guess on SWPPP creation, implementation and monitoring can vary greatly dependant on outcome of environmental study. **

Weather & Equipment Lead Times (Poles)

Unexpected delays on material lead times, unusually inclement weather will impact schedule but might impact AFUDC costs as well. **

Permits and Wetland mitigation Undetermined until environmental analysis is complete. ***

Outages may not be available

Preliminary schedule only considers general outage constraints. Specific project schedule may be delayed by days, weeks or months dependant on system conditions. Delays of months = increased project costs. **

Scope based on design assumptions which may change

Varied impact on cost and schedule. ***

*-low impact to cost, ** - moderate impact to cost, ***- high impact to cost, **** - very high impact to cost.

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The following transactions were included in this Facilities Study: 7. CONFIRMED RESERVATIONS OASIS PSE MW Begin End 250778 (delist) Entergy Services, Inc. (EMO) 1 7/2/1998 7/1/2011 569011 Entergy Services, Inc. (EMO) 242 3/1/2000 1/1/2014 759196 Entergy Services, Inc. (EMO) 143 1/1/2001 1/1/2021 759294 East Texas Electric Cooperative 31 1/1/2001 1/1/2018 850239 Muni Energy Agcy of Miss 19 5/1/2001 1/1/2010 850304 Muni Energy Agcy of Miss 13 5/1/2001 6/1/2010 851493 Muni Energy Agcy of Miss 13 5/1/2001 6/1/2010 1024194 (renewal) City Water & Light, Jonesboro 83 1/1/2003 1/1/2010 1024198 (renewal) City Water & Light, Jonesboro 168 1/1/2003 1/1/2010 1096986 Tennessee Valley Authority 73 9/1/2003 9/1/2013 1099991 (renewal) City Water & Light, Jonesboro 83 1/1/2010 1/1/2016 1099997 (renewal) City Water & Light, Jonesboro 168 1/1/2010 1/1/2016 1105665 Entergy Services, Inc. (EMO) 236 2/1/2003 2/1/2016 1105666 Entergy Services, Inc. (EMO) 91 2/1/2003 2/1/2027 1105668 Entergy Services, Inc. (EMO) 77 2/1/2003 2/1/2027 1126821 Entergy Services, Inc. (EMO) 101 5/1/2004 5/1/2029 1151106 Entergy Services, Inc. (EMO) 20 6/1/2010 6/1/2029 1161925 CLECO Power LLC (Gen) 12 8/1/2003 1/1/2010 1161927 CLECO Power LLC (Gen) 7 8/1/2003 1/1/2010 1161928 CLECO Power LLC (Gen) 7 8/1/2003 1/1/2010 1168061 Entergy Services, Inc. (EMO) 80 8/1/2004 2/1/2028 1168408 Entergy Services, Inc. (EMO) 247 8/1/2004 2/1/2028 1286481 Merrill Lynch Commodities 11 1/1/2000 1/1/2010 1289686 (delist) Entergy Services, Inc. (EMO) 1 6/1/2007 6/1/2030 1294132 Entergy Services, Inc. (EMO) 526 1/1/2006 1/1/2035 1309874 (renewal) East Texas Electric Cooperative 75 1/1/2009 1/1/2017 1309875 (renewal) East Texas Electric Cooperative 50 1/1/2009 1/1/2017 1309876 (renewal) East Texas Electric Cooperative 50 1/1/2009 1/1/2017 1328125 CLECO Power Marketing 35 1/1/2006 1/1/2011 1332606 East Texas Electric Cooperative 55 1/1/2006 1/1/2017 1338849 Louisiana Energy & Power Authority 45 9/1/2005 9/1/2010 1340017 Plum Point Energy Associates 40 3/1/2010 3/1/2040 1340019 Plum Point Energy Associates 35 3/1/2010 3/1/2040 1348508 CLECO Power Marketing 10 1/1/2006 1/1/2010 1352704 Plum Point Energy Associates 5 3/1/2010 3/1/2040 1356328 Muni Energy Agcy of Miss 40 6/1/2010 6/1/2040 1373643 City of Conway 25 3/1/2010 3/1/2040 1375299 Louisiana Generating LLC 11 3/1/2006 3/1/2013 1375300 Louisiana Generating LLC 8 3/1/2006 3/1/2011 1375301 Louisiana Generating LLC 5 3/1/2006 3/1/2011 1375559 CLECO Power LLC (Gen) 675 12/1/2006 12/1/2016 1380484 Osceola Light & Power 9 9/1/2009 9/1/2039 1381398 Constellation Energy Commodities Grp. 34 1/1/2006 1/1/2036 1381400 Constellation Energy Commodities Grp. 34 1/1/2006 1/1/2036 1381404 Constellation Energy Commodities Grp. 17 1/1/2006 1/1/2036 1381406 Constellation Energy Commodities Grp. 17 1/1/2006 1/1/2036 1383852 Arkansas Electric Cooperative Corp. 550 1/1/2007 1/1/2017

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OASIS PSE MW Begin End 1384737 Louisiana Energy & Power Authority 13 9/1/2005 9/1/2010 1385158 NRG Power Marketing 13 10/1/20070 10/1/2027 1387272 CLECO Power LLC (Gen) 11 4/1/2006 4/1/2016 1393874 NRG Power Marketing 5 9/1/2006 9/1/2009 1401985 Constellation Energy Commodities Grp. 42 8/1/2006 8/1/2036 1406786 South Miss Electric Power Assoc. 100 4/1/2010 4/1/2040 1408199 South Miss Electric Power Assoc. 100 4/1/2010 4/1/2040 1408981 NRG Power Marketing 92 1/1/2007 1/1/2010 1410022 Constellation Energy Commodities Grp. 60 3/1/2010 3/1/2040 1422708 (delist) Entergy Services, Inc. (EMO) 1 1/1/2007 1/1/2027 1425495 East Texas Electric Cooperative 50 3/1/2010 3/1/2045 1435972 Entergy Services, Inc. (EMO) 150 5/1/2007 5/1/2010 1435973 Entergy Services, Inc. (EMO) 135 5/1/2008 5/1/2010 1437089 Arkansas Electric Cooperative Corp. 349 1/1/2007 1/1/2012 1440189 Arkansas Electric Cooperative Corp. 84 1/1/2008 1/1/2012 1440190 Arkansas Electric Cooperative Corp. 104 1/1/2008 1/1/2012 1442296 (renewal) NRG Power Marketing 103 1/1/2008 1/1/2011 1442453 NRG Power Marketing 320 6/1/2007 6/1/2026 1448044 Entergy Services, Inc. (EMO) 3 1/1/2007 9/21/2009 1449495 Entergy Services, Inc. (EMO) 322 6/1/2009 6/1/2059 1450222 American Electric Power 225 1/1/2008 1/1/2010 1453402 NRG Power Marketing 40 1/1/2009 1/1/2010 1456636 CLECO Power Marketing 10 10/1/2007 10/1/2012 1460876 Aquila Networks-MPS 75 3/1/2009 3/1/2029 1460878 Aquila Networks-MPS 75 3/1/2009 3/1/2029 1460879 Aquila Networks-MPS 75 3/1/2009 3/1/2029 1460881 Aquila Networks-MPS 75 3/1/2009 3/1/2029 1460898 Louisiana Energy & Power Authority 3 1/1/2009 1/1/2030 1460899 Louisiana Energy & Power Authority 5 1/1/2009 1/1/2030 1461442 Louisiana Energy & Power Authority 12 1/1/2009 1/1/2030 1464028 East Texas Electric Cooperative 168 1/1/2010 1/1/2040 1466197 NRG Power Marketing 206 1/1/2009 1/1/2010 1468113 Muni Energy Agcy of Miss 20 6/1/2011 6/1/2041 1470484 City of West Memphis 20 1/1/2011 1/1/2041 1470811 East Texas Electric Cooperative 186 1/1/2010 1/1/2040 1472304 (renewal) South Miss Electric Power Assoc. 75 6/1/2009 6/1/2011 1472315 South Miss Electric Power Assoc. 100 6/1/2010 6/1/2011 1477069 Entergy Services, Inc. (EMO) 10 11/1/2007 11/1/2037 1480164 Entergy Services, Inc. (EMO) 725 1/1/2005 9/1/2033 1483485 Entergy Services, Inc. (EMO) 100 1/1/2008 1/1/2011 1486898 (renewal) NRG Power Marketing 100 9/1/2008 9/1/2009 1487076 (renewal) Cargill Power Markets, LLC 103 1/1/2009 1/1/2010 1487084 (renewal) Cargill Power Markets, LLC 103 1/1/2009 1/1/2010 1487880 NRG Power Marketing 300 1/1/2008 1/1/2010 1487892 (renewal) NRG Power Marketing 100 1/1/2009 1/1/2010 1487893 (renewal) NRG Power Marketing 100 1/1/2009 1/1/2010 1495910 Southwestern Electric 78 5/1/2010 5/1/2013 1498120 Constellation Energy Commodities Grp. 60 4/1/2012 4/1/2042 1498122 Constellation Energy Commodities Grp. 30 4/1/2012 4/1/2042

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OASIS PSE MW Begin End 1498129 City of Conway 50 4/1/2012 4/1/2042 1499610 Entergy Services, Inc. (EMO) 300 1/1/2008 1/1/2038 1500582 (delist) Entergy Services, Inc. (EMO) 1 1/1/2008 1/1/2038 1500584 (delist) Entergy Services, Inc. (EMO) 1 1/1/2008 1/1/2038 1502952 Arkansas Electric Cooperative Corp. 200/ 330 1/1/2008 1/1/2013 1505603 East Texas Electric Cooperative 10 1/1/2008 1/1/2010 1514102 East Texas Electric Cooperative 29 1/1/2008 1/1/2017 1514104 East Texas Electric Cooperative 35 1/1/2008 1/1/2017 1514105 (delist) East Texas Electric Cooperative 1 1/1/2008 1/1/2017 1517005 (renewal) NRG Power Marketing 103 1/1/2011 1/1/2026 1521210 (renewal) NRG Power Marketing 5 9/1/2009 9/1/2010 1523070 (renewal) NRG Power Marketing 100 9/1/2009 9/1/2010 1523071 (renewal) NRG Power Marketing 100 1/1/2010 1/1/2011 1523072 (renewal) NRG Power Marketing 100 1/1/2010 1/1/2011 1525820 (renewal) NRG Power Marketing 3 7/1/2009 7/1/2014 1526694 (renewal) NRG Power Marketing 103 1/1/2009 1/1/2010 1527816 Westar Energy 6 10/1/2007 10/1/2012 1530287 Empire District Electric 50 3/1/2010 3/1/2030 1530288 Empire District Electric 50 3/1/2010 3/1/2030 1531163 (renewal) NRG Power Marketing 103 7/1/2009 7/1/2010 1543574 (renewal) Cargill Power Markets, LLC 103 1/1/2010 1/1/2011 1546095 (delist) Entergy Services, Inc. (EMO) 1 1/1/2008 1/1/2011 1546108 (delist) Entergy Services, Inc. (EMO) 1 1/1/2011 1/1/2051 1552148 (delist) Entergy Services, Inc. (EMO) 1 1/1/2009 1/1/2014 1555122 (renewal) Constellation Energy Commodities Grp. 28 1/1/2009 1/1/2011 1555123 (renewal) Constellation Energy Commodities Grp. 22 1/1/2009 1/1/2011 1555124 (renewal) Constellation Energy Commodities Grp. 25 1/1/2009 1/1/2011 1555547 (renewal) Cargill Power Markets, LLC 103 1/1/2010 1/1/2011 1555717 (delist) East Texas Electric Cooperative 1 1/1/2010 1/1/2015 1555718 Entergy Services, Inc. (EMO) 158 1/1/2010 1/1/2015 1557220 (delist) Entergy Services, Inc. (EMO) 1 7/1/2009 7/1/2018 1557221 Entergy Services, Inc. (EMO) 520 7/1/2009 7/1/2018 1557602 (delist) East Texas Electric Cooperative 1 1/1/2009 1/1/2017 1564001 (renewal) Louisiana Energy & Power Authority 6 4/1/2009 4/1/2014 1564356 (renewal) NRG Power Marketing 5 9/1/2009 9/1/2025 1566301 NRG Power Marketing 300 1/1/2008 1/1/2010 1566302 NRG Power Marketing 300 1/1/2008 1/1/2013 1575310 Constellation Energy Commodities Grp. 5 9/1/2008 9/1/2009 1577552 (renewal) NRG Power Marketing 103 7/1/2009 7/1/2010 1577553 (renewal) NRG Power Marketing 103 1/1/2010 1/1/2011 1582874 Constellation Energy Commodities Grp. 25 9/1/2008 9/1/2009 1585225 (renewal) City of Prescott 22 4/1/2009 4/1/2039 1585239 (delist) Entergy Services, Inc. (EMO) 1 1/1/2009 1/1/2013 1585240 (delist) Entergy Services, Inc. (EMO) 1 1/1/2009 1/1/2013 1594155 (renewal) Merrill Lynch Commodities 85 11/1/2008 11/1/2009 1594156 (renewal) Merrill Lynch Commodities 4 11/1/2008 11/1/2009 1594157 (renewal) Merrill Lynch Commodities 16 11/1/2008 11/1/2009 1598022 (renewal) NRG Power Marketing 103 7/1/2010 7/1/2015 1598291 Entergy Services, Inc. (EMO) 206 6/1/2012 6/1/2042

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OASIS PSE MW Begin End 1598885 (renewal) Morgan Stanley Commodities Group 102 1/1/2009 1/1/2014 1598886 (renewal) Morgan Stanley Commodities Group 102 1/1/2009 1/1/2014 1599383 Entergy Services, Inc. (EMO) 1 6/1/2009 6/1/2012 1599384 Entergy Services, Inc. (EMO) 485 6/1/2009 6/1/2012 1601111 Constellation 5 1/1/2010 1/1/2015 1602650 NRG Power Marketing 5 7/1/2010 7/1/2020 1604055 Westar Energy Generation and Marketing 15 6/1/2010 6/1/2015 1608189 (renewal) NRG Power Marketing 206 1/1/2010 1/1/2011 1611309 Entergy Services, Inc. (EMO) 804 1/1/2011 1/1/2058 1611843 (renewal) Ameren Entergy, Inc. 165 1/1/2009 1/1/2010 1615102 (renewal) MidAmerican Energy, Inc. 50 1/1/2009 1/1/2014 1615103 MidAmerican Energy, Inc. 50 1/1/2009 1/1/2014 1615105 MidAmerican Energy, Inc. 50 1/1/2009 1/1/2014 1615108 MidAmerican Energy, Inc. 50 1/1/2009 1/1/2014 1616447 Entergy Services, Inc. (EMO) 10 1/1/2008 1/1/2011 1616448 Entergy Services, Inc. (EMO) 74 1/1/2008 1/1/2011 1624492 American Electric Power 45 9/1/2000 1/1/2011 1624671 (delist) Entergy Services, Inc. (EMO) 1 6/1/2009 6/1/2010 1624673 Entergy Services, Inc. (EMO) 100 6/1/2009 6/1/2010 1627289 Entergy Services, Inc. (EMO) 158 6/1/2009 1/1/2010 1628473 NRG Power Marketing 100 1/1/2011 1/1/2020 1628474 NRG Power Marketing 100 1/1/2011 1/1/2020 1629240 MidAmerican Energy, Inc. 7 3/1/2009 3/1/2014 1629242 MidAmerican Energy, Inc. 93 3/1/2009 3/1/2011 1630065 NRG Power Marketing 40 1/1/2010 1/1/2015 1631134 NRG Power Marketing 103 1/1/2011 1/1/2016 1631135 NRG Power Marketing 206 1/1/2011 1/1/2016 1632265 Merrill Lynch Commodities 1 4/1/2009 4/1/2014 1632268 Merrill Lynch Commodities 25 4/1/2009 4/1/2014 1633701 NRG Power Marketing 20 1/1/2010 1/1/2019 1633702 NRG Power Marketing 20 1/1/2010 1/1/2016 1633703 NRG Power Marketing 20 1/1/2010 1/1/2016 1639337 Entergy Services, Inc. (EMO) 587 3/1/2009 1/1/2019 1639338 Entergy Services, Inc. (EMO) 103 3/1/2009 1/1/2019 1639339 Entergy Services, Inc. (EMO) 32 3/1/2009 1/1/2019 1639340 Entergy Services, Inc. (EMO) 122 3/1/2009 1/1/2019 1639341 Entergy Services, Inc. (EMO) 134 3/1/2009 1/1/2019 1639611 Kansas City Power & Light 68 3/1/2009 3/1/2010 1640629 CLECO Power Marketing 58 5/1/2001 1/1/2021 1640630 CLECO Power Marketing 32 5/1/2001 1/1/2021 1643984 NRG Power Marketing 100 9/1/2010 9/1/2015 1644155 CLECO Power Marketing 9 4/1/2009 5/1/2016 1644215 NRG Power Marketing 83 1/1/2010 1/1/2025 1644908 CLECO Power Marketing 41 5/1/2009 5/1/2018 1648049 delist Entergy Services, Inc. (EMO) 1 6/1/2010 6/1/2013 1648050 Entergy Services, Inc. (EMO) 100 6/1/2010 6/1/2013 1655366 Missouri Joint Municipal 6 10/1/2009 10/1/2014 1656261 NRG Power Marketing 40 1/1/2010 1/1/2012 1656262 NRG Power Marketing 40 1/1/2010 1/1/2011

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8. PRE-888 TRANSACTIONS OASIS # PSE MW Begin End 1332606 East Texas Electric Cooperative 55 1/1/2006 1/1/2017 1412155 Entergy Services, Inc. (EMO) 1718 1/1/2007 1/1/2038 1412156 Entergy Services, Inc. (EMO) 741 1/1/2007 1/1/2038 1412158 Entergy Services, Inc. (EMO) 1867 1/1/2007 1/1/2038 1412160 Entergy Services, Inc. (EMO) 1142 1/1/2007 1/1/2038 1412161 Entergy Services, Inc. (EMO) 59 1/1/2007 1/1/2038 1412162 Entergy Services, Inc. (EMO) 148 1/1/2007 1/1/2038 1412163 Entergy Services, Inc. (EMO) 194 1/1/2007 1/1/2038 1412164 Entergy Services, Inc. (EMO) 1157 1/1/2007 1/1/2038 1412165 Entergy Services, Inc. (EMO) 1219 1/1/2007 1/1/2038 1412166 Entergy Services, Inc. (EMO) 683 1/1/2007 1/1/2038 1412167 Entergy Services, Inc. (EMO) 140 1/1/2007 1/1/2038 1412168 Entergy Services, Inc. (EMO) 456 1/1/2007 1/1/2038 1412169 Entergy Services, Inc. (EMO) 739 1/1/2007 1/1/2038 1412170 Entergy Services, Inc. (EMO) 183 1/1/2007 1/1/2038 1412171 Entergy Services, Inc. (EMO) 64 1/1/2007 1/1/2038 1412172 Entergy Services, Inc. (EMO) 870 1/1/2007 1/1/2038 1412173 Entergy Services, Inc. (EMO) 129 1/1/2007 1/1/2038 1412174 Entergy Services, Inc. (EMO) 140 1/1/2007 1/1/2038 1412175 Entergy Services, Inc. (EMO) 130 1/1/2007 1/1/2038 1412176 Entergy Services, Inc. (EMO) 65 1/1/2007 1/1/2038 1412177 Entergy Services, Inc. (EMO) 947 1/1/2007 1/1/2038 1412178 Entergy Services, Inc. (EMO) 61 1/1/2007 1/1/2038 1412179 Entergy Services, Inc. (EMO) 304 1/1/2007 1/1/2038 1412180 Entergy Services, Inc. (EMO) 351 1/1/2007 1/1/2038 1412181 Entergy Services, Inc. (EMO) 692 1/1/2007 1/1/2038 1412182 Entergy Services, Inc. (EMO) 1641 1/1/2007 1/1/2038 1412183 Entergy Services, Inc. (EMO) 433 1/1/2007 1/1/2038 1412184 Entergy Services, Inc. (EMO) 1926 1/1/2007 1/1/2038 1412185 Entergy Services, Inc. (EMO) 946 1/1/2007 1/1/2038 1412186 Entergy Services, Inc. (EMO) 1233 1/1/2007 1/1/2038 1498278 Entergy Services, Inc. (EMO) 75 8/1/2007 1/1/2017 1498281 Entergy Services, Inc. (EMO) 86 8/1/2007 1/1/2017 1498283 Entergy Services, Inc. (EMO) 68 8/1/2007 1/1/2017 1498284 Entergy Services, Inc. (EMO) 78 8/1/2007 1/1/2017 1498285 Entergy Services, Inc. (EMO) 11 8/1/2007 1/1/2044 1498286 Entergy Services, Inc. (EMO) 69 8/1/2007 1/1/2044 1498287 Entergy Services, Inc. (EMO) 14 8/1/2007 1/1/2044

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9. STUDY QUEUE OASIS # PSE MW Begin End 1646749 CLECO Power Marketing 173 1/1/2010 1/1/2020 1648591 Entergy Services (SPO) 1 6/1/2010 6/1/2012 1648592 Entergy Services (SPO) 485 6/1/2010 6/1/2012 1658087 Entergy Services (SPO) 21 6/1/2012 6/1/2042 10. ATTACHMENTS

A. Table of Acronyms ACSR Aluminum Conductor Steel Reinforced ACSS Aluminum Conductor Steel Supported ADSS All Dielectric Self Supporting Optical Cable ADEQ Arkansas Department of Environmental Quality AFUDC Allowance for Funds Used During Construction ATC Available Transfer Capability EES Entergy Control Area EHV Extra-High Voltage FP Financial Project ICT Independent Coordinator of Transmission kV Kilo-Volt MCM (M) Thousand Circular Mils MVA Mega-Volt Amp MW Mega-Watt NPDES National Pollution Discharge Elimination System NOI Notice of Intent OASIS Online Access and Same-time Information System OATT Open Access Transmission Tariff OG&E Oklahoma Gas & Electric OPGW Optical Fiber Composite Overhead Ground Wire PEP Project Execution Plan POR Point of Receipt ROW Right of Way SES Steam Electric Station SOC System Operations Center SHPO Arkansas State Historic Preservation Office SHV Super High Voltage SW Switch Station SWEPCO Southwest Electric Power Company TOC Transmission Operations Center WMUC City of West Memphis Control Area WO Work Order

B. Drawings: Description Drawing Number Spring Ridge Rd. 115kV Substation M4298S05 Byram 115kV Substation M3150S05 Spring Ridge Rd electrical arrangement M4298EA2

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1. PROJECT SUMMARY1.1. Background and Project Need1.2. Scope Summary1.3. Cost Summary1.4. Schedule Summary

2. SAFETY REQUIREMENTS & GENERAL ASSUMPTIONS3. SCOPE OF WORK 3.1. Transmission Substations3.1.1 Brookhaven 115kV:General:

3.1.2 Byram Substation – add line breaker: General:Foundations: Electrical:Relay:Relay Settings:Communications and SCADA:Metering:

3.1.3 Ray Braswell 115kV Substation:General:Site:Foundations:Electrical:Relay:Relay Settings:Communications and SCADA:Metering:

3.1.4 Spring Ridge 115kV Substation:General:Site:Foundations:Electrical:Relay:Relay Settings:Communications and SCADA:Metering:

3.2. Transmission Lines3.2.1 Ray Braswell to Byram: Build New 115kV Transmission LineGeneral:Structures and Foundations:Conductor and Insulators:Shield Wire:

3.2.2 Byram to Terry: Rebuild Existing 115kV Transmission LineGeneral:Structures and Foundations:Conductor and Insulators:Shield Wire:Relay and Settings Work:

3.2.3 East Vicksburg to Waterway Existing 115kV Transmission LineGeneral:Design Considerations:Relay and Settings Work:

3.2.4 Florence to Florence Switching Station line upgradeGeneral:Design Considerations:Relay and Settings Work:

3.2.5 Brookhaven to Mallalieu line upgradeGeneral:Design Considerations:Relay and Settings Work:

4. COST5. SCHEDULE6. RISK ASSESSMENT7. CONFIRMED RESERVATIONS8. PRE-888 TRANSACTIONS9. STUDY QUEUE10. ATTACHMENTSA. Table of Acronyms B. Drawings:

Documents

TRANSMISSION SERVICE FACILITIES STUDY OASIS 1658088 · 2009. 10. 21. · SEL421 relay for primary and an SEL311C relay for backup protection. Settings will need to be derived for