Information Postings

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1 For Details, Contact:. Information Postings Matt Hammond Phone (803) Date of Subject of Posting Posting 03/19/2018 Maintenance is currently planned for the Eastover-Sumter 115 kv tie-line with Progress Energy from September 19, 2018 through November 21, 2018 and from March 18, 2019 through May 24, /08/2018 SCE&G will be conducting maintenance on a portion of the Cainhoy Mt Pleasant 115 kv #2 line beginning February 15 and ending February 16, /11/2018 Phase III The Summerville-Four-Hole Swamp section of the St. George-Summerville project: This last section is approximately 14.5 miles long and contains 112 electric structures. Construction is ongoing with the existing wooden poles being removed and replaced with new, galvanized steel poles. Some of the road crossings included in this section are Marymeade Road, Highway 17, Short Street, Jedburg Road, as well as Highway 78. Phase III is scheduled for completion in May /17/2017 SCE&G is planning to rebuild approximately 0.61 miles of an existing 115-kilovolt transmission line between Godbold Court and the Circle Drive Substation, on Circle Drive in Columbia, SC. Construction is tentatively scheduled for September VictoryGardensCircleDrivePlanView 08/28/2017 Unit 1 Reactor Shutdown This morning, V. C. Summer Unit 1 experienced an automatic reactor shutdown due to an issue with the center phase of the main transformer on the non-nuclear side of the plant. The plant is in a safe, stable condition while our teams assess repairs. The plant s safety systems are designed for issues such as this and have responded appropriately. Our staff is fully trained and qualified to respond to these types of events. 06/20/2017 The step up transformer for Saluda Hydro #3 is out of service and is undergoing repair or replacement. 06/07/2017 To serve the new Jushi plant in the southeastern part of Columbia, SCE&G plans to relocate the CIP Hopkins 115kV in two stages: the first being a temporary relocation to facilitate the construction of the new plant and the second being a permanent relocation to serve the plant. The proposed completion date is 11/30/18. 05/01/2017 To improve the reliability of the transmission and distribution systems in the downtown Columbia area, SCE&G plans to convert Park St substation to 115kV by 12/31/19. The conversation of Park St to 115/13.8 kv allows distribution to be tied to adjacent circuits which increases the reliability and

2 - 2 - Date of Posting Subject of Posting resiliency to critical loads in downtown Columbia. 04/03/2017 In 2007 SCE&G proposed a new 115-kV electrical transmission line called Hamlin 115-kV tie line. SCE&G constructed the new line using a combination of underground paper-insulated high-pressure gas-filled (HPGF) transmission line (5 miles) between the Isle of Palms substation and the Hungryneck substation. To satisfy contingency criteria, standard 115-kV overhead construction was used for 1 mile of the line back to the Hamlin substation. The Hamlin-Isle of Palms 115-kV line allows SCE&G to provide greater reliability and meet electric demand in northern Mount Pleasant and Isle of Palms/Sullivan s Island by providing a back-up source of power for three existing substations. The project took 16 months to complete. 08/24/2016 In order to provide the necessary infrastructure to carry the power generated by the two new nuclear units under construction at SCE&G s VC Summer Station to customers in the Lowcountry, SCE&G is planning to upgrade several existing transmission lines located in Summerville, South Carolina. The Summerville Boone Hill 115 kv rebuild project (Phase I) will begin at Finucan Road and follow the right of way that backs up to the Dovewood and Mendenhall sections of South Pointe neighborhood off Highway 78 in Berkeley County. Line construction is expected to begin in the fall of 2016, first with erosion control, access improvement, surveying and right-of-way clearing (September 2016 October 2016) and then with construction (November 2016 January 2017). The St. George- Summerville 230 kv rebuild project (Phase II) is scheduled to begin in August 2017 and is scheduled to be completed by mid The St. George Summerville rebuild project will happen in the northern part of the right of way closer to the Mendenhall section of South Pointe. 05/06/2015 Lyles West Columbia 33 kv: Replace Poles at Saluda River Crossing: SCE&G will replace two structures near the Saluda River at the rapids just north of the Riverbanks Zoo. The completion date is 12/31/15. 05/06/2015 Williams St Uptown 115 kv: Relocate 2 Structures for USC Tower: SCE&G will relocate two structures along Pendleton St for a proposed apartment building. The completion date is 9/30/15. 05/06/2015 Adams Run - Red House Rd 46kV: Relocate Structures at Russell Creek: SCE&G will relocate four structures for the SCDOT Russell Creek Bridge Replacement project on SC 174. The completion date is 5/29/15. 04/17/2015 The Westvaco Thomas Island 115kV work utilizing a helicopter near the I-526 Don Holt Bridge has been delayed. That work is now scheduled to start on or about April 27 th. 04/10/2015 Isle of Palms 115 kv Sub: Install Fold In and Add Overhead Wire SCE&G plans to install an overhead wire on the transmission line that crosses the marsh adjacent to the Isle of Palms connector. The overhead wire will be installed utilizing a helicopter to transport men and equipment to the existing transmission line. SCE&G plans to perform this work from on or about May 4, 2015 to May 11, The crews plan to work 7 days a week, from daylight until dark.

3 - 3 - Date of Subject of Posting Posting 04/10/2015 Westvaco Thomas Island 115 kv: Replace Conductor Clouter Island (I-526 at Don Holt Bridge) SCE&G will be replacing conductor on a section of a 115 kv transmission line that parallels I-526 at the Don Holt Bridge. This project will utilize a helicopter to transport men and equipment to the transmission line. SCE&G plans to perform this work from on or about April 20, 2015 to May 4, The crews plan to work 7 days a week, from daylight until dark. 11/25/2014 Bayview - Charlotte St 115 kv #2 Continuing to increase the reliability of the electrical grid in Charleston, SCE&G will be installing a steel pipe via horizontal directional drill in early 2015 under the Cooper River from Charleston to Mount Pleasant. This operation will require the closure of Charlotte Street to traffic, bicycles, and pedestrians from Washington Street to Concord Street from January 5, 2015 thru March 13, 2015 for drill operations and pipe staging. SCE&G has proactively worked with the S.C. State Ports Authority and the City of Charleston to accommodate an alternate route for cruise traffic in conjunction with this project. 11/12/2014 SCE&G will relocate the Faber Place Westvaco Cogen 115 kv for the SCDOT Noisette Creek Bridge Replacement project (approximately 0.30 miles). The estimated completion date is 5/29/15. 11/12/2014 SCE&G will construct a new 115 kv tap into the new Joint Base Charleston Substation near Remount Rd. The estimated completion date is 5/29/15. 08/15/2014 The Westvaco (KapStone) to Thomas Island 115kV line is currently out of service due to minor equipment issues. SCE&G is assessing the issue and expects repairs to be complete this weekend. The section of line impacted is located in marsh/river areas making access difficult and repairs slow. 07/25/2014 On July 25, 2014, a 115kV transmission line with distribution underbuilt tripped after a tree made contact with the underbuilt distribution line. The subsequent arc from the fault on the distribution line flashed into the transmission line; the transmission line operated and locked out, resulting in a 27 minute outage in the Summerville Area. 05/15/2014 SCE&G hereby gives public notice that on May 16, 2014, it will hold a scoping meeting with SCE&G's renewable generation business unit concerning a generator interconnection request. 04/21/2014 SCE&G has an outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name Yemassee McIntosh 115kV). This line is out of service Wednesday 4/23/2014 beginning 08:00 EPT. SCE&G will make an OASIS reservation for 40MWs of Non-Firm PTP Transmission Service from SCE&G thru SOCO back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) The outage has a scheduled end time of 4/24/2014 at 16:00 EPT. YemasseeHardeevilleGaPower115kV /15/2014 Several transmission system outages have been scheduled during the VC Summer nuclear plant refueling outage. These outages will allow for transmission system construction to be completed and the transmission line associated with new nuclear construction connected to the VC Summer #1 switchyard. At the completion of the VC Summer refueling outage, the VC Summer #1 switchyard will have all its new nuclear transmission lines connected and energized. 03/28/2014 Polar Vortex presentation.

4 - 4 - Date of Posting Subject of Posting PolarVortex 02/15/2014 SCE&G has restored its transmission system and has returned to normal system operation following Winter Storm Pax. 01/22/2014 SCE&G will share upcoming work with the City of Columbia and other attendees at a meeting scheduled for Thursday, January 23 rd, The attached files contain slides with the information that will be shared at that meeting Projects - City of Columbia 01/08/2014 SCE&G has an outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name Yemassee McIntosh 115kV). This line is out of service Tuesday 1/7/2014 beginning 05:00 EPT. SCE&G will make an OASIS reservation for 117 MWs of Non-Firm PTP Transmission Service from SCE&G thru SOCO back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) The outage has a scheduled end time of 1/8/2014 at 17:00 EPT. YemasseeHardeevilleGaPower115kV /07/2014 SCE&G has an outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name Yemassee McIntosh 115kV). This line is out of service Tuesday 1/7/2014 beginning 05:00 EPT. SCE&G will make an OASIS reservation for 117 MWs of Non-Firm PTP Transmission Service from SCE&G thru SOCO back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) The outage has a scheduled end time of 1/8/2014 at 12:00 EPT. YemasseeHardeevilleGaPower115kV /07/2014 SCE&G has an outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name Yemassee McIntosh 115kV). This line is out of service Tuesday 1/7/2014 beginning 05:00 EPT. SCE&G will make an OASIS reservation for 117 MWs of Non-Firm PTP Transmission Service from SCE&G thru SOCO back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) The outage duration is unknown at this time YemasseeHardeevilleGaPower115kV /26/2013 SCE&G is planning a maintenance outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name Yemassee McIntosh 115kV). This line is scheduled to be out of service Friday, 1/3/2014 from 08:30 EPT 15:00 EPT. SCE&G will make an OASIS reservation for 44 MWs of Firm PTP Transmission Service from SCE&G thru SOCO back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) YemasseeHardeevilleGaPower115kV

5 - 5 - Date of Subject of Posting Posting 12/05/2013 SCE&G Power Delivery Department is constructing a 115kV transmission line that will tap the Santee to Holly Hill 115kV line and terminate at the new Eutawville substation (approx. 6 to 7 miles from the tap). Construction of the line began in November 2013 with completion scheduled for May of /04/2013 On October 2, 2013, at 13:50, the Eastover Orangeburg East 115kV Line experienced two instantaneous operations. The cause was due to a failed connection at a switch in the Orangeburg #1 115 Substation. 09/30/2013 SCE&G is planning a maintenance outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name Yemassee McIntosh 115kV). This line is schedules to be out of service from Thursday 10/3/2013 from 08:00 EPT 14:00 EPT. SCE&G will make an OASIS reservation for ~38MWs of Firm PTP Transmission Service from SCE&G thru SOCO back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) YemasseeHardeevilleGaPower115kV /30/2013 Relocation of the McMeekin-Coit 115kV line and the Williams Street-Coit 115kV line is scheduled from October 1, 2013 to February 28, Each of these lines will be de-energized periodically during the period. Specific outage times will be posted no later than a day ahead basis. 08/06/2013 Dissolved Gas Analysis testing showed gassing on Fairfield Pumped Storage Transformer #1 (on Units 1 and 2). Subsequent internal inspection identified poorly crimped connections. The transformer is being removed from service and replaced with an onsite spare. Expected in-service date for the new transformer is November /06/2013 Rebuild a section of the Williams Street to Coit 115kV and the McMeekin to Coit 115kV lines SPDC. Rebuild is approximately 0.73 miles. 05/03/2012 HAMLIN ISLE OF PALMS 115kV FACT SHEET HISTORY In 1988, SCE&G received a permit to construct a new transmission line from Mount Pleasant to Isle of Palms. At that time, power was being brought to IOP and Sullivan s Island by two 23kV lines on standard wooden poles from Mount Pleasant along the causeway to Sullivan s Island. In order to meet the growing electric demand and provide a reliable electric service to the Isle of Palms and Sullivan s Island, work began on a 115kV line that would be carried on 14 concrete pilings in the marsh south of what is now the Isle of Palms connector. This work was completed in GROWTH Much growth has been seen in this coastal South Carolina area since then. According to 2010 South Carolina Census data, Mount Pleasant has seen a 42.5 percent growth in its population since With a population at 67,843, Mount Pleasant is ranked the fourth largest city in South Carolina. PLANNING In order to better serve its growing number of customers and provide greater service reliability, SCE&G proposed a new 115kV electrical transmission line in 2007 called the Hamlin 115kV Tie Line after a series of public workshops as part of its siting process. Property owners were notified and preliminary surveying began. The original route was on the Mount Pleasant side only with the majority of the new line being overhead transmission with one exception for a portion to be underground because of an airstrip. From 2007 to 2009 at the request of the Town of Mt. Pleasant, SCE&G studied placing a larger section of the line underground on the Mount Pleasant side, and then in 2009, SCE&G began to look at additional options. THE PROPOSAL With rapid advances in the technology used to construct and maintain underground transmission lines, SCE&G

6 - 6 - Date of Posting Subject of Posting evaluated the plans for the Hamlin 115kV Tie Line and determined the best plan for the overall electrical system in the Mount Pleasant and surrounding areas would be to construct a new 5-mile underground transmission line between the Isle of Palms substation on 13 th Avenue and a future substation site off of Rifle Range Road. The much smaller 0.7-mile remaining section would be placed overhead back to the Hamlin substation on Porchers Bluff Road in Mount Pleasant. WHY DO WE NEED IT? This new line, to be called the Hamlin-Isle of Palms 115kV line, allows SCE&G to provide greater reliability and meet the growing electrical needs of northern Mt. Pleasant and Isle of Palms/Sullivan s Island, by providing a back-up source of power. In the case of an outage to the transmission system caused by a major storm, power to the Isle of Palms and portions of Sullivan s Island as well as North Mt. Pleasant could be restored in minutes, instead of hours or days. CONSTRUCTION SCHEDULE In the fall of 2011, SCE&G notified all property owners along the selected route and began line surveying and soil boring activities for the new Hamlin-Isle of Palms 115kV line. With final approval from regulating agencies, the Isle of Palms City Council and the Mount Pleasant Town Council, work is scheduled to begin in the fall of With an estimated one-year construction schedule, work is scheduled for completion in the fall of /26/2012 SCE&G and Santee Cooper are building two 1,117 megawatt nuclear units at the site of V. C. Summer Nuclear Station. As a result of the delayed issuance of the Combined Operating License, the new units are now expected to be completed in 2017 and The transmission projects associated with these generating units will be completed in sufficient time to support operation of the units. 04/16/2012 Fairfield Pump Storage Units #3 and #4 are offline for transformer repairs and modifications. 03/23/2012 Hardeeville combustion turbine generator step-up transformer is out of service. 02/27/2012 VC Summer Unit #2 and #3 Transmission Line Update - February SCE&G s Power Delivery group resolved the routes for the four 230 kv transmission lines associated with Units 2 & 3, i.e., the VCS1 Killian Line (Unit 2), the VCS2 Lake Murray Line No. 2 (Unit 2), and the VCS2 St. George No. 1 and No. 2 Lines (Unit 3). These new lines will occupy existing transmission right of way (ROW) corridors except for an approximate 6 mile new ROW segment (Blythewood-Killian segment) of the VCS1-Killian 230kV Line. 2. SCE&G commenced ROW acquisition on the Blythewood-Killian segment in March of Of the 51 parcels involved, 38 are accessible for construction as of this update. 3. SCE&G and Pike Energy Solutions signed an engineering, procurement and construction (EPC) contract in February of 2011, to provide for the permitting, engineering and design, procurement of material, and the construction of the four lines needed to connect the Units. 4. SCE&G applied to the Public Service Commission of South Carolina in August of 2011 for a Certificate of Environmental Compatibility & Public Convenience & Necessity ( the Certificate ) for the Unit 2 lines (VCS1-Killian 230 kv line and the VCS2-Lake Murray 230 kv Line No. 2) and a segment of the VCS2-St. George 230 kv Line No. 1 (this Unit 3 line segment will run with the Lake Murray No. 2 line). On January 12, 2012, by Order No , the Commission granted SCE&G the Certificate for the requested Unit 2 lines and the one segment of the Unit 3 line.

7 - 7 - Date of Posting Subject of Posting 5. Pike Energy Solutions has completed design, procured materials and begun construction on a 14 mile segment (Winnsboro Jct.-Winnsboro) of the VCS1-Killian 230kV line. Design and material procurement continues on other segments of the Unit 2 lines and portion of the Unit 3 line with construction also scheduled to continue in SCE&G anticipates filing the separate Commission application for the Unit 3 lines (VCS2-St. George 230 kv Lines No. 1 & 2, (excluding the segment of the St. George No. 1 line filed with the Unit 2 lines) later this year. 09/26/2011 SCE&G is planning a maintenance outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name Yemassee McIntosh 115kV). This line is scheduled to be out of service from Friday 9/30/2011 at 09:00 EPT 11:00 EPT. SCE&G will make an OASIS reservation for ~37MWs of Firm PTP Transmission Service from SCE&G thru SOCO back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) YemasseeHardeevilleGaPower115kVtielinefor pdf 09/20/2011 SCE&G is planning a maintenance outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name Yemassee McIntosh 115kV). This line is scheduled to be out of service from Monday 9/26/2011 at 07:00 EPT 17:00 EPT. SCE&G will make an OASIS reservation for ~58MWs of Firm PTP Transmission Service from SCE&G thru SOCO back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) YemasseeHardeevilleGaPower115kVtielinefor pdf 09/01/2011 VC Summer #2 Transmission Update 1. SCE&G s Power Delivery group has resolved the routes for the four 230 kv transmission lines associated with the Units, i.e., the VCS1 Killian Line (Unit 2), the VCS2 Lake Murray Line No. 2 (Unit 2), and the VCS2 St. George No. 1 and No. 2 Lines (Unit 3). These new lines will now occupy existing transmission right of way (ROW) corridors except for a segment of approximately 6 miles of the VCS1-Killian Line that will be built on a new ROW. Follow the link for a map of the selected route corridor for the 6 mile segment that does not follow the existing ROW. BlythewoodKillian115kVCorridor 2. SCE&G has commenced right of way acquisition on the Blythewood-Killian segment of the VCS1- Killian Line on March 22, Of the 41 parcels involved, 17 have been acquired as of the end of July SCE&G and Pike Energy Solutions signed an engineering, procurement and construction (EPC) contract on February 28, 2011, to provide for the permitting, engineering and design, procurement of material, and the construction of the four lines needed to connect the Units. Pike is currently progressing with the design engineering on the VCS1-Killian 230 kv Line. Material procurement is expected to begin in the 3 rd quarter. Construction is expected to begin in first quarter of 2012 on VCS Winnsboro segment assuming all required permits are in hand. 4. SCE&G has completed the Siting and Environmental Reports for the Unit 2 lines (VCS1-Killian 230 kv line and the VCS2-Lake Murray 230 kv Line No. 2 (which includes a segment of the VCS2-St. George 230 kv Line No. 1)) in support of the Commission application for a Certificate of Environmental Compatibility & Public Convenience & Necessity. SCE&G anticipates filing this Commission application on or about August 9, SCE&G anticipates filing the separate Commission application for the Unit 3 lines (VCS2-St. George 230 kv

8 - 8 - Date of Posting Subject of Posting Lines No. 1 & 2, (excluding the segment of the No. 1 line filed with the Unit 2 lines) in late fourth quarter /01/2011 SCE&G is planning to convert the Callawassie Island 46-23kV substation to kV by December 1, The project will also install a 28 MVA kV transformer. The present 46kV tap from the Callawassee kV substation that serves the Callawassie Island 46-23kV substation will also be rebuilt with 795 ACSR and will be converted to 115kV. In addition, a second kV transformer will be located at the Callawassie kV substation in the Fall of 2011 to provide a back up to the existing transformer. Once the conversion of the Callawassie Island 46-23kV substation is complete, the transformers at the Callawassie 115kV substation will be removed. 08/09/2011 VC Summer #2 Transmission Update 6. SCE&G s Power Delivery group has resolved the routes for the four 230 kv transmission lines associated with the Units, i.e., the VCS1 Killian Line (Unit 2), the VCS2 Lake Murray Line No. 2 (Unit 2), and the VCS2 St. George No. 1 and No. 2 Lines (Unit 3). These new lines will now occupy existing transmission right of way (ROW) corridors except for a segment of approximately 6 miles of the VCS1-Killian Line that will be built on a new ROW. 7. SCE&G has commenced right of way acquisition on the Blythewood-Killian segment of the VCS1- Killian Line on March 22, Of the 41 parcels involved, 17 have been acquired as of the end of July SCE&G and Pike Energy Solutions signed an engineering, procurement and construction (EPC) contract on February 28, 2011, to provide for the permitting, engineering and design, procurement of material, and the construction of the four lines needed to connect the Units. Pike is currently progressing with the design engineering on the VCS1-Killian 230 kv Line. Material procurement is expected to begin in the 3 rd quarter. Construction is expected to begin in first quarter of 2012 on VCS Winnsboro segment assuming all required permits are in hand. 9. SCE&G has completed the Siting and Environmental Reports for the Unit 2 lines (VCS1-Killian 230 kv line and the VCS2-Lake Murray 230 kv Line No. 2 (which includes a segment of the VCS2-St. George 230 kv Line No. 1)) in support of the Commission application for a Certificate of Environmental Compatibility & Public Convenience & Necessity. SCE&G anticipates filing this Commission application on or about August 9, SCE&G anticipates filing the separate Commission application for the Unit 3 lines (VCS2-St. George 230 kv Lines No. 1 & 2, (excluding the segment of the No. 1 line filed with the Unit 2 lines) in late fourth quarter /21/2011 On April 19, 2011 at 15:27, the Lake Murray to Columbia Industrial Park (CIP) 115kV line operated and locked out. During restoration, voltage sags were observed throughout the Columbia area as System Controllers attempted to sectionalize the line and reestablish service to the Customers experiencing the outage. The cause of the outage was a failed lightning arrestor. 04/04/2011 Correction to 02/28/2011 posting: SCE&G has completed the outage of the Burton Transmission substation to Ladies Island substation 46 kv line. This line was taken out of service in order to perform various construction activities on the line, including framing/installing structures and conductors, in order to upgrade this line from 46 kv to 115 kv. The line has been returned to service. 02/28/2011 Correction to 02/07/2011 posting: SCE&G is planning an outage from April 20, 2010 through March 31, 2011 of the Burton Transmission substation to Ladies Island substation 46 kv line. This line will be taken out of service in order to perform various activities on the line, including framing/installing structures and conductors, in order to upgrade this line from 46kV to 115kV. 02/07/2011 Correction to 01/03/2011 posting: SCE& G is planning an outage from April 20, 2010 through February 28, 2011 of the Burton Transmission substation to Ladies Island substation 46 kv line. This line will be taken out of service in order to perform various construction activities on the line, including framing/installing structures and conductors, in order to upgrade this line from 46kV to 115kV.

9 - 9 - Date of Subject of Posting Posting 01/03/2011 Correction to 11/18/2010 posting: SCE& G is planning an outage from April 20, 2010 through January 31, 2011 of the Burton Transmission substation to Ladies Island substation 46 kv line. This line will be taken out of service in order to perform various construction activities on the line, including framing/installing structures and conductors, in order to upgrade this line from 46kV to 115kV. 11/18/2010 Correction to 10/21/2010 posting: SCE&G is planning an outage from April 20, 2010 through December 31, 2010 of the Burton Transmission substation to Ladies Island substation 46kV line. This line will be taken out of service in order to perform various construction activities on the line, including framing/installing structures and conductors, in order to upgrade this line from 46kV to 115kV. In completing the installation of the new line, SCE&G is trimming trees for clearance from Pigeon Point in Beaufort to the Lady s Island substation. There is also tree trimming work being done on North Street from the marsh to Ribaut Road. SCE&G expects to complete this tree trimming by November 30, /04/2010 SCE&G is planning a maintenance outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name McIntosh Hardy). This line is scheduled to be out of service from Tuesday 11/9/2010 at 07:00EPT 18:00 EPT. SCE&G will make an OASIS reservation for ~45MWs of Firm PTP Transmission Service from SCE&G thru SOCO back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) YemasseeHardeevilleGaPower115kVtielinefor pdf 10/21/2010 At 19:50, the Yemassee McIntosh 115kV line tripped due to a fault. 10/21/2010 Correction to 09/15/2010 posting: SCE&G is planning an outage from April 20, 2010 through December 31, 2010 of the Burton Transmission substation to Ladies Island substation 46kV line. This line will be taken out of service in order to perform various construction activities on the line, including framing/installing structures and conductors, in order to upgrade this line from 46kV to 115kV. 09/15/2010 Correction to 04/19/2010 posting: SCE&G is planning an outage from April 20, 2010 through October 31, 2010 of the Burton Transmission substation to Ladies Island substation 46kV line. This line will be taken out of service in order to perform various construction activities on the line, including framing/ installing structures and conductors, in order to upgrade this line from 46kV to 115kV. 09/13/2010 Bayview Charlotte St 115 kv Line Upgrade Overhead Project: During October, a second underground line will be added from Charlotte Street to Bayview. A portion of the existing line from Patriots Point (where underground line terminates) to the Bay View will be rebuilt (new structures/conductor) and double circuited. The 1.5 mile project involves replacing pole structures along West Coleman Boulevard from Darby Boulevard to just past Harborgate Drive. Another section goes along an existing transmission corridor near Lansing Drive. 07/13/2010 SCE&G s Power Delivery department has the following project scheduled for December 2011: Kendrick Gills Creek 115kV line and tap construction for the Gills Creek Substation 06/14/2010 SCE& G s Power Delivery department has the following projects scheduled for December 2011: Gills Creek 115/23kV Substation Construct Kendrick Gills Creek 33kV line Convert to 115kV 05/23/2010 Due to a storm in the low country this evening, SCE&G had two 115kV lines from Yemassee to Burton that tripped out of service affecting multiple substations in the Beaufort area. 05/20/2010 SCE&G is planning a maintenance outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name Jasper County Const McIntosh 115kV). This line is scheduled to be out of service from Wednesday 5/26/2010 at 10:00 EPT Wednesday 5/26/2010 at 17:00 EPT and from Thursday 5/27/2010 at 08:00 EPT Thursday 5/27/2010 at 16:00 EPT. SCE&G will make an OASIS reservation for ~62 MWs of Firm PTP Transmission Service from SCE&G thru SOCO

10 Date of Posting Subject of Posting back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) YesmaseeHardeevilleGaPower115kVtielinefor pdf 05/17/2010 At 4:22 am this morning, SCE&G opened two 115kV switches to repair damage to a wooden pole which was caused by a weather system that occurred on Sunday afternoon. This planned outage of the 115kV line affected the STATE Newspaper facility and was coordinated with the Customer prior to taking the line out of service. 04/19/2010 Correction to 04/09/2010 posting: SCE&G is planning an outage from April 20, 2010 through September 28, 2010 of the Burton Transmission substation to Ladies Island substation 46kV line. This line will be taken out of service in order to perform various construction activities on the line, including framing/ installing structures and conductors, in order to upgrade this line from 46kV to 115kV. 04/09/2010 SCE&G is planning an outage from April 12, 2010 through September 28, 2010 of the Burton Transmission substation to Ladies Island substation 46kV line. This line will be taken out of service in order to perform various construction activities on the line, including framing/ installing structures and conductors, in order to upgrade this line from 46kV to 115kV. 04/05/2010 SCE&G is planning a maintenance outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name Jasper County Const McIntosh 115kV). This line is scheduled to be out of service from Tuesday 4/13/2010 at 08:00 EPT Tuesday 4/13/2010 at 17:00 EPT. SCE&G will make an OASIS reservation for ~40 MWs of Firm PTP Transmission Service from SCE&G thru SOCO back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) YemasseeHardeevilleGaPower115kVTielinefor /23/2010 On March 23, 2010, the Saluda Hydro (SCE&G) Bush River black (Duke) 115kV Tie Newberry B has returned to service. 03/23/2010 On March 23, 2010, the Saluda Hydro (SCE&G) Bush River black (Duke) 115 kv Tie Newberry B is being taken out of service. 03/05/2010 On March 5, 2010, in Docket No. ER , the FERC issued an ERRATA notice that the effective date of rates is March 1, A copy of the ERRATA notice may be accessed by the link found below. ERRATA Notice.pdf 03/03/2010 VCS Bus #3 will be removed from service on March 4, 2010 to perform required relay testing. VCS Bus #2 will be removed from service on March 8 10, 2010 to perform work necessary for the relocation of the Parr #2 line. This outage will cause Fairfield Pumped Storage to be unavailable during the outage of this bus. 02/26/2010 In Docket No. ER , SCE&G requested revised rates to become effective March 1, On February 26, 2010, FERC issued an Order which accepted SCE&G s revised rates effective March 2, SCE&G will be requesting clarification that the effective date should be March 1, If FERC grants the requested clarification, the revised rates would become effective March 1, 2010, rather than March 2, SCE&G will revise this posting when the clarification is issued by FERC. 02/17/2010 This spring, SCE&G will begin work to upgrade the existing transmission line that runs from a substation off Ribaut Road in the City of Beaufort to the substation on Ladies Island located on Hwy 802. The work is expected to begin within the next few months after a contractor is awarded the job. Construction will take approximately six-nine months to complete. These upgrades will provide additional electricity to Port Royal and Ladies Island, serving to increase the reliability of this service and provide a backup power source to the existing facilities that serve Ladies Island. 02/05/2010 Disconnect switch in the switchyard has been repaired and V. C. Summer Nuclear Station has returned to service. 02/04/2010 V. C. Summer Nuclear Station is coming off-line to allow repair of disconnect switch in the switchyard. 01/14/2010 SCE& G is planning a maintenance outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name Jasper County Const McIntosh 115kV). This line is scheduled to be out of service from Tuesday 1/19/2010 at 08:00EPT

11 Date of Posting Subject of Posting Tuesday 1/19/2010 at 11:00 EPT. SCE &G will make an OASIS reservation for ~ 53 MWs of Firm PTP Transmission Service from SCE& G thru SOCO back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) YesmaseeHardeevilleGaPower115kVTieline for pdf 12/29/2009 On December 29, 2009, SCE&G submitted to the FERC for filing revised tariff sheets to change the network and point to point transmission rates under SCE&G s OATT. The requested rates utilize a cost of service formula. The FERC has assigned Docket No. ER to the filing. A copy of the filing may be accessed by the link found below. SCEG OATT Formula Transmission Rate Filing.pdf 11/11/2009 SCE&G is planning a maintenance outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name Jasper County Const McIntosh 115kV). This line is scheduled to be out of service continuously from Tuesday 11/17/2009 at 08:00 EPT Tuesday 11/17/2009 at 15:00 EPT. SCE&G will make an OASIS reservation for ~36 MWs of Firm PTP Transmission Service from SCE&G thru SOCO back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) YesmaseeHardeevilleGaPower115kVTielinefor pdf 10/15/2009 The 115kV line from Parr 115kV bus to VCS#1 bus will be out of service from 8 am, 10/26 to 4 pm, 10/26. 10/15/2009 In coordination with replacement of the VCS GSU the section of 230kV from VCS#1 bus to the VCS GSU will be out of service during this activity beginning 10/26 and ending during November /05/2009 SCE&G s VCS Nuclear Station tripped offline on Friday morning, October 2, 2009 at approximately 6:49 am. The cause of the trip was internal to the plant generator breaker. The restart date for the facility has not been determined. 09/17/2009 In coordination with construction activities posted on 9/10/2009 SCE& G extended the Energy Schedule on Transmission Reservation # to cover an additional two hours as indicated below. 45 MW leaving SCE& G for HE 1700 EPT and 43 MW leaving SCE&G for HE 1800 EPT (9/17/09). 09/10/2009 Due to construction activities, SCE&G is planning a maintenance outage on the Yemassee-Hardeeville-Ga Power 115kV Tie-line (Common Name Jasper County Const McIntosh 115kV). This line is scheduled to be out of service continuously from Monday 9/14/2009 at 08:00 EPT Thursday 9/17/2009 at 16:00 EPT and again from Monday 9/21/2009 at 08:00 EPT Thursday 9/24/2009 at 16:00 EPT. SCE&G will make an OASIS reservation for ~45 MWs of Firm PTP Transmission Service from SCE&G thru SOCO back to SCE&G and will schedule Energy to flow as outlined in the table below during these times. (Please select hyperlink to view table) YesmaseeHardeevilleGaPower115kVTieline.pdf 09/09/2009 At approximately 5pm on September 09, 2009, SCE&G will be de-energizing the 115kV radial line feeding Bluffton, SC (Daufuskie, Alljoy Beach, portions of Old Town and Buckwalter Parkway) in order to make repairs to a damaged structure. This outage should last approximately 4 hours.

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