165 FERC ¶ 61,124

UNITED STATES OF AMERICA

FEDERAL ENERGY REGULATORY COMMISSION

18 CFR Part 40

[Docket Nos. RM18-8-000 and RM15-11-003; Order No. 851]

Geomagnetic Disturbance Reliability Standard; Reliability Standard for Transmission 

System Planned Performance for Geomagnetic Disturbance Events

(Issued November 15, 2018)

AGENCY: Federal Energy Regulatory Commission.

ACTION: Final rule.

SUMMARY: The Federal Energy Regulatory Commission (Commission) approves 

Reliability Standard TPL-007-2 (Transmission System Planned Performance for 

Geomagnetic Disturbance Events). The North American Electric Reliability Corporation 

(NERC), the Commission-certified Electric Reliability Organization, submitted 

Reliability Standard TPL-007-2 for Commission approval. The Commission also directs 

NERC to develop and submit modifications to Reliability Standard TPL-007-2: (1) to 

require the development and implementation of corrective action plans to mitigate

assessed supplemental GMD event vulnerabilities; and (2) to authorize extensions of time 

to implement corrective action plans on a case-by-case basis. In addition, the 

Commission accepts the revised GMD research work plan submitted by NERC.

EFFECTIVE DATE: This rule will become effective [INSERT DATE 60 days after 

publication in the FEDERAL REGISTER].
Docket Nos. RM18

-8-000 and RM15-11-003 ii

FOR FURTHER INFORMATION CONTACT:

Michael Gandolfo (Technical Information)

Office of Electric Reliability

Federal Energy Regulatory Commission

888 First Street, NE

Washington, DC 20426

(202) 502-6817

Michael.Gandolfo@ferc.gov

Matthew Vlissides (Legal Information)

Office of the General Counsel

Federal Energy Regulatory Commission

888 First Street, NE

Washington, DC 20426

(202) 502-8408

Matthew.Vlissides@ferc.gov

SUPPLEMENTARY INFORMATION:
165 FERC ¶ 61,124

UNITED STATES OF AMERICA

FEDERAL ENERGY REGULATORY COMMISSION

Before Commissioners: Neil Chatterjee, Chairman;

 Cheryl A. LaFleur and Richard Glick.

 

Geomagnetic Disturbance Reliability Standard

Reliability Standard for Transmission System Planned 

Performance for Geomagnetic Disturbance Events

 Docket Nos. RM18-8-000

RM15-11-003

ORDER NO. 851

FINAL RULE

(Issued November 15, 2018)

Pursuant to section 215 of the Federal Power Act (FPA), the Commission 

approves Reliability Standard TPL-007-2 (Transmission System Planned Performance for 

Geomagnetic Disturbance Events).1

 The North American Electric Reliability 

Corporation (NERC), the Commission-certified Electric Reliability Organization (ERO), 

submitted Reliability Standard TPL-007-2 for Commission approval in response to 

directives in Order No. 830.2

 As discussed in this final rule, we determine that 

Reliability Standard TPL-007-2 better addresses the risks posed by geomagnetic 

 1 16 U.S.C. 824o.

2 Reliability Standard for Transmission System Planned Performance for 

Geomagnetic Disturbance Events, Order No. 830, 156 FERC ¶ 61,215, (2016) 

reh’g denied, Order No. 830-A, 158 FERC ¶ 61,041 (2017).
Docket Nos. RM18-8-000 and RM15-11-003 - 2 -

disturbances (GMDs) to the Bulk-Power System, particularly with respect to the potential 

impacts of locally-enhanced GMD events, than currently-effective Reliability Standard 

TPL-007-1 and complies with the Commission’s directives in Order No. 830. 

GMD events occur when the sun ejects charged particles that interact with and 

cause changes in the earth’s magnetic fields. GMD events have the potential to cause 

severe, wide-spread impacts on the Bulk-Power System.3

 Currently-effective Reliability 

Standard TPL-007-1 requires applicable entities to assess the vulnerability of their 

transmission systems to a “benchmark GMD event.” An applicable entity that does not 

meet certain performance requirements, based on the results of the benchmark GMD 

vulnerability assessment, must develop and implement a corrective action plan to achieve 

the performance requirements. 

The improvements in Reliability Standard TPL-007-2 are responsive to the 

directives in Order No. 830: (1) to revise the benchmark GMD event definition, as it 

pertains to the required GMD vulnerability assessments and transformer thermal impact 

assessments, so that the definition is not based solely on spatially-averaged data; (2) to 

require the collection of necessary geomagnetically induced current (GIC) monitoring 

and magnetometer data; and (3) to include a one-year deadline for the completion of 

corrective action plans and two- and four-year deadlines to complete mitigation actions

 3 Reliability Standards for Geomagnetic Disturbances, Order No. 779, 143 FERC 

¶ 61,147, at P 3, reh’g denied, 144 FERC ¶ 61,113 (2013); see also Reliability Standard 

TPL-007-2, Background.
Docket Nos. RM18-8-000 and RM15-11-003 - 3 -

involving non-hardware and hardware mitigation.4

 As discussed below, Reliability 

Standard TPL-007-2 complies with these directives and improves upon the currentlyeffective version of the Reliability Standard by requiring applicable entities to: 

(1) in addition to the benchmark GMD event requirements, conduct supplemental 

GMD vulnerability assessments and thermal impact assessments, which apply a new 

supplemental GMD event definition that does not rely solely on spatially-averaged data; 

(2) obtain GIC and magnetometer data; and (3) meet the Commission-directed deadlines 

for the development and completion of tasks in corrective action plans. Accordingly, 

pursuant to section 215(d)(2) of the FPA, we approve Reliability Standard TPL-007-2.

5

In addition, as discussed in the Notice of Proposed Rulemaking, we determine that 

it is appropriate, pursuant to section 215(d)(5) of the FPA,

6 to direct NERC to develop 

and submit modifications to Reliability Standard TPL-007-2 to require the development 

and completion of corrective action plans to mitigate assessed supplemental GMD event 

vulnerabilities.7

 As discussed below, requiring corrective action plans for supplemental 

GMD event vulnerabilities is appropriate to ensure the reliability of the Bulk-Power 

 4 “Spatial averaging” refers to the averaging of magnetometer readings over a 

geographic area. In developing the benchmark GMD event definition, the standard 

drafting team averaged several (but not all) geomagnetic field readings taken by 

magnetometers located within square geographical areas of 500 km per side.

5 16 U.S.C. 824o(d)(2).

6 Id. 824o(d)(5).

7 Geomagnetic Disturbance Reliability Standard, Notice of Proposed Rulemaking, 

83 FR 23854 (May 23, 2018), 163 FERC ¶ 61,126 (2018) (NOPR). 
Docket Nos. RM18-8-000 and RM15-11-003 - 4 -

System when confronted with locally-enhanced GMD events, just as corrective action 

plans are necessary to mitigate the effects of benchmark GMD events. Based on the 

record in this proceeding, we discern no technical barriers to either developing or 

complying with such a requirement. Moreover, the record supports issuance of a 

directive at this time notwithstanding comments in response to the NOPR advocating 

postponement of any directive until after the completion of additional GMD research. As 

discussed below, the relevant GMD research tasks are scheduled to be completed before 

the modified Reliability Standard must be submitted. The Commission directs NERC to 

submit the modified Reliability Standard for approval within 12 months from the 

effective date of Reliability Standard TPL-007-2. 

We also determine that it is appropriate, pursuant to section 215(d)(5) of the FPA,

to direct that NERC modify the provision in Reliability Standard TPL-007-2, 

Requirement R7.4 that allows applicable entities to exceed deadlines for completing 

corrective action plan tasks when “situations beyond the control of the responsible entity 

[arise].” The NOPR raised concerns regarding the appropriateness of a self-executing 

deadline extension and observed that it was inconsistent with guidance in Order No. 830 

that extension requests be considered on a case-by-case basis.

8

 We recognize the point 

made in NERC’s comments in response to the NOPR that, under NERC’s proposal,

“NERC and Regional Entity staff would exercise their authority to review the 

reasonableness of any Corrective Action Plan delay, including reviewing the ‘situations 

 8 Order No. 830, 156 FERC ¶ 61,215 at P 102.
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beyond the control of the responsible entity’ that are cited as causing the delay” and that 

Requirement R7.4 is “not so flexible ... as to allow entities to extend Corrective Action 

Plan deadlines indefinitely or for any reason whatsoever.”9

 While we generally agree 

with the standard of review that NERC states it will use to assess the merits of extension 

requests, we conclude that such assessments should be made before any time extensions

are permitted. By requiring prior approval of extension requests, the modified Reliability 

Standard will limit the potential for unwarranted delays in implementing corrective action 

plans while also providing NERC with an advance and more holistic understanding of 

where, to whom, and for how long, extensions are granted. We expect that the extension 

process developed by NERC in response to our directive will be timely and efficient such 

that applicable entities will receive prompt responses after submitting to NERC or a 

Regional Entity, as appropriate, the extension request and associated information

described in Requirement R7.4.

10 We also direct NERC, as proposed in the NOPR, to 

prepare and submit a report addressing how often and why applicable entities are 

exceeding corrective action plan deadlines as well as the disposition of extension 

requests, which is due within 12 months from the date on which applicable entities must 

comply with the last requirement of Reliability Standard TPL-007-2. Following receipt 

of the report, the Commission will determine whether further action is necessary.

 9 NERC Comments at 20-21.

10 NOPR, 163 FERC ¶ 61,126 at P 50.
Docket Nos. RM18-8-000 and RM15-11-003 - 6 -

The Commission, as discussed below, also accepts the revised GMD research 

work plan submitted by NERC on April 19, 2018.11

I. Background

A. Section 215 and Mandatory Reliability Standards

Section 215 of the FPA requires the Commission to certify an ERO to develop 

mandatory and enforceable Reliability Standards, subject to Commission review and 

approval. Once approved, the Reliability Standards may be enforced in the United States 

by the ERO, subject to Commission oversight, or by the Commission independently.12

B. GMD Primer

GMD events occur when the sun ejects charged particles that interact and cause 

changes in the earth’s magnetic fields.13 Once a solar particle is ejected, it can take 

between 17 to 96 hours (depending on its energy level) to reach earth.14 A geoelectric 

field is the electric potential (measured in volts per kilometer (V/km)) on the earth’s 

surface and is directly related to the rate of change of the magnetic fields.15 The 

geoelectric field has an amplitude and direction and acts as a voltage source that can 

 11 North American Electric Reliability Corporation, Filing, Docket No. RM15-11-

003 (filed Apr. 19, 2018) (Revised GMD Research Work Plan).

12 16 U.S.C. 824o(e).

13 See NERC, 2012 Special Reliability Assessment Interim Report: Effects of 

Geomagnetic Disturbances on the Bulk Power System at i-ii (February 2012).

14 Id. at ii.

15 Id.
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cause GICs to flow on long conductors, such as transmission lines.16 The magnitude of 

the geoelectric field amplitude is impacted by local factors such as geomagnetic latitude 

and local earth conductivity.17 Geomagnetic latitude is the proximity to earth’s magnetic 

north and south poles, as opposed to earth’s geographic poles.18 Local earth conductivity 

is the ability of the earth’s crust to conduct electricity at a certain location to depths of 

hundreds of kilometers down to the earth’s mantle. Local earth conductivity impacts the 

magnitude (i.e., severity) of the geoelectric fields that are formed during a GMD event 

by, all else being equal, a lower earth conductivity resulting in higher geoelectric fields.19

GICs can flow in an electric power system with varying intensity depending on the 

various factors discussed above. As explained in the Background section of Reliability 

Standard TPL-007-2, “[d]uring a GMD event, geomagnetically‐induced currents (GIC) 

may cause transformer hot‐spot heating or damage, loss of Reactive Power sources, 

increased Reactive Power demand, and Misoperation(s), the combination of which may 

result in voltage collapse and blackout.”

 16 Id.

17 NERC, Benchmark Geomagnetic Disturbance Event Description, Docket 

No. 15-11-000, at 4 (filed June 28, 2016) (2016 NERC White Paper).

18 Id.

19 Id.
Docket Nos. RM18-8-000 and RM15-11-003 - 8 -

C. Currently-Effective Reliability Standard TPL-007-1 and Order No. 830

1. Currently-Effective Reliability Standard TPL-007-1

Reliability Standard TPL-007-1 consists of seven requirements and applies to 

planning coordinators, transmission planners, transmission owners and generation owners 

who own or whose planning coordinator area or transmission planning area includes a 

power transformer with a high side, wye-grounded winding connected at 200 kV or 

higher. 

Requirement R1 requires planning coordinators and transmission planners (i.e., 

“responsible entities”) to determine the individual and joint responsibilities in the 

planning coordinator’s planning area for maintaining models and performing studies 

needed to complete the GMD vulnerability assessment required in Requirement R4. 

Requirement R2 requires responsible entities to maintain system models and GIC system 

models needed to complete the GMD vulnerability assessment required in Requirement 

R4. Requirement R3 requires each responsible entity to have criteria for acceptable 

system steady state voltage performance for its system during the GMD conditions 

described in Attachment 1 of Reliability Standard TPL-007-1. Requirement R4 requires 

responsible entities to conduct a GMD vulnerability assessment every 60 months using 

the benchmark GMD event described in Attachment 1. Requirement R5 requires 

responsible entities to provide GIC flow information, based on the benchmark GMD 

event definition, to be used in the transformer thermal impact assessments required in 

Requirement R6, to each transmission owner and generator owner that owns an 

applicable transformer within the applicable planning area. Requirement R6 requires 
Docket Nos. RM18-8-000 and RM15-11-003 - 9 -

transmission owners and generator owners to conduct thermal impact assessments on 

solely and jointly owned applicable transformers where the maximum effective GIC 

value provided in Requirement R5 is 75 Amperes per phase (A/phase) or greater. 

Requirement R7 requires responsible entities to develop corrective action plans if the 

GMD vulnerability assessment concludes that the system does not meet the performance 

requirements in Table 1 of Reliability Standard TPL-007-1.

Calculation of the benchmark GMD event, against which applicable entities must 

assess their facilities, is fundamental to compliance with Reliability Standard TPL-007-1. 

Reliability Standard TPL-007-1, Requirement R3 states that “[e]ach responsible entity, as 

determined in Requirement R1, shall have criteria for acceptable System steady state 

voltage performance for its System during the benchmark GMD event described in 

Attachment 1.”

Reliability Standard TPL-007-1, Attachment 1 states that the benchmark GMD 

event is composed of four elements: (1) a reference peak geoelectric field amplitude of 8 

V/km derived from statistical analysis of historical magnetometer data; (2) a scaling 

factor to account for local geomagnetic latitude; (3) a scaling factor to account for local 

earth conductivity; and (4) a reference geomagnetic field time series or wave shape to 

facilitate time-domain analysis of GMD impact on equipment. The product of the first 

three elements is referred to as the regional peak geoelectric field amplitude. The 

benchmark GMD event defines the geoelectric field values used to compute GIC flows 
Docket Nos. RM18-8-000 and RM15-11-003 - 10 -

for a GMD vulnerability assessment, which is required in Reliability Standard TPL007-1.20

For the purpose of determining a benchmark event that specifies what severity 

GMD events a responsible entity must assess for potential impacts on the Bulk-Power 

System, NERC determined that a 1-in-100 year GMD event would cause an 8 V/km 

reference peak geoelectric field amplitude at 60 degree north geomagnetic latitude using 

Québec’s earth conductivity.21 Scaling factors (i.e., multiplying values) are applied to 

this reference peak geoelectric field amplitude to adjust the 8 V/km value for different 

geomagnetic latitudes (scaling factors between 0.1 and 1.0) and earth conductivities 

(scaling factors between 0.21 and 1.17). NERC identified a reference geomagnetic field 

time series from an Ottawa, Ontario magnetic observatory during a 1989 GMD storm 

affecting Québec. NERC used this to estimate a time series (i.e., 10-second values over a 

period of days) of the geoelectric field that is representative of what is expected to occur 

at 60 degree geomagnetic latitude during a 1-in-100 year GMD event. Such a time series 

 20 See Reliability Standard TPL-007-1, Requirements R4 and R5. Reliability 

Standard TPL-007-1 does not set a threshold amount of GIC flow that would constitute 

a vulnerable transformer. However, if a transformer is calculated to experience a 

maximum effective GIC flow during a benchmark GMD event of a least 75 A/phase, a 

thermal impact assessment of that transformer is required. See Reliability Standard TPL007-1, Requirement R6.

21 NERC used Québec as the location for the reference peak 1-in-100 year GMD 

event because of its proximity to 60 degree geomagnetic latitude and its well understood 

earth model. By creating scaling factors, each entity can scale this reference peak 

geoelectric field and geoelectric field time series values to match its own expected field 

conditions.
Docket Nos. RM18-8-000 and RM15-11-003 - 11 -

is used in some methods of calculating the vulnerability of a transformer to damage from 

heating caused by GIC. 

NERC used field measurements taken from the International Monitor for Auroral 

Geomagnetic Effects (IMAGE) magnetometer chain, which consists of 39 magnetometer 

stations in Northern Europe, for the period 1993-2013 to calculate the reference peak 

geoelectric field amplitude. As described in the 2016 NERC White Paper, to arrive at a 

reference peak geoelectric field amplitude of 8 V/km, NERC “spatially averaged” four 

different station groups each spanning a square area of approximately 500 km (roughly 

310 miles) in width. 

2. Order No. 830

On January 21, 2015, NERC submitted for Commission approval Reliability 

Standard TPL-007-1 in response to the directive in Order No. 779 that NERC develop 

one or more Reliability Standards to address the effects of GMD events on the electric 

grid.22 In Order No. 830, the Commission approved Reliability Standard TPL-007-1, 

concluding that Reliability Standard TPL-007-1 addressed the Commission’s directive by 

requiring applicable Bulk-Power System owners and operators to conduct, on a recurring 

five-year cycle, initial and ongoing vulnerability assessments regarding the potential 

impact of a benchmark GMD event on the Bulk-Power System as a whole and on BulkPower System components. In addition, the Commission determined that Reliability 

Standard TPL-007-1 requires applicable entities to develop and implement corrective 

 22 Order No. 779, 144 FERC ¶ 61,113 at P 54.
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action plans to mitigate vulnerabilities identified through those recurring vulnerability 

assessments and that potential mitigation strategies identified in Reliability Standard 

TPL-007-1 include, but are not limited to, the installation, modification or removal of 

transmission and generation facilities and associated equipment. 

In Order No. 830, the Commission also determined that Reliability Standard TPL007-1 should be modified. Specifically, Order No. 830 directed NERC to develop and 

submit modifications to Reliability Standard TPL-007-1 concerning: (1) the calculation 

of the reference peak geoelectric field amplitude component of the benchmark GMD 

event definition; (2) the collection and public availability of necessary GIC monitoring 

and magnetometer data; and (3) deadlines for completing corrective action plans and the 

mitigation measures called for in corrective action plans. Order No. 830 directed NERC 

to develop and submit these revisions for Commission approval within 18 months of the 

effective date of Order No. 830.

With respect to the calculation of the reference peak geoelectric field amplitude 

component of the benchmark GMD event definition, Order No. 830 expressed concern 

with relying solely on spatial averaging in Reliability Standard TPL-007-1 because “the 

use of spatial averaging in this context is new, and thus there is a dearth of information or 

research regarding its application or appropriate scale.”23 While Order No. 830 directed 

that the peak geoelectric field amplitude should not be based solely on spatially-averaged 

 23 Order No. 830, 156 FERC ¶ 61,215 at P 45.
Docket Nos. RM18-8-000 and RM15-11-003 - 13 -

data, the Commission indicated that this “directive should not be construed to prohibit the 

use of spatial averaging in some capacity, particularly if more research results in a better 

understanding of how spatial averaging can be used to reflect actual GMD events.”24

D. NERC Petition and Reliability Standard TPL-007-2

NERC states that Reliability Standard TPL-007-2 enhances currently-effective 

Reliability Standard TPL-007-1 by addressing reliability risks posed by GMDs more 

effectively and implementing the directives in Order No. 830.25 NERC asserts that 

Reliability Standard TPL-007-2 reflects the latest in GMD understanding and provides a 

technically sound and flexible approach to addressing the concerns discussed in Order 

No. 830. NERC contends that the proposed modifications enhance reliability by 

expanding GMD vulnerability assessments to include severe, localized impacts and by 

implementing deadlines and processes to maintain accountability in the development, 

completion, and revision of corrective action plans developed to address identified 

vulnerabilities. Further, NERC states that the proposed modifications improve the 

availability of GMD monitoring data that may be used to inform GMD vulnerability 

assessments.

Reliability Standard TPL-007-2 modifies currently-effective Reliability Standard 

TPL-007-1 by requiring applicable entities to: (1) conduct supplemental GMD 

 24 Id. P 46.

25 Reliability Standard TPL-007-2 is not attached to this final rule. Reliability 

Standard TPL-007-2 is available on the Commission’s eLibrary document retrieval 

system in Docket No. RM18-8-000 and on the NERC website, www.nerc.com.
Docket Nos. RM18-8-000 and RM15-11-003 - 14 -

vulnerability and transformer thermal impact assessments in addition to the existing 

benchmark GMD vulnerability and transformer thermal impact assessments required in 

Reliability Standard TPL-007-1; (2) collect data from GIC monitors and magnetometers 

as necessary to enable model validation and situational awareness; and (3) develop 

necessary corrective action plans within one year from the completion of the benchmark 

GMD vulnerability assessment, include a two-year deadline for the implementation of 

non-hardware mitigation, and include a four-year deadline to complete hardware 

mitigation.26

In particular, Reliability Standard TPL-007-2 modifies Requirements R1 

(identification of responsibilities), R2 (system and GIC system models) and R3 (criteria 

for acceptable System steady state) to extend the existing requirements pertaining to 

benchmark GMD assessments to the new supplemental GMD assessments. Reliability 

Standard TPL-007-2 adds the newly mandated supplemental GMD vulnerability and 

transformer thermal impact assessments in new Requirements R8 (supplemental GMD 

vulnerability assessment), R9 (GIC flow information needed for supplemental GMD 

thermal impact assessments) and R10 (supplemental GMD thermal impact assessments). 

The supplemental GMD event definition contains a higher, non-spatially-averaged 

reference peak geoelectric field amplitude component than the benchmark GMD event 

 26 Unless otherwise indicated, the requirements of Reliability Standard TPL-007-2 

are substantively the same as the requirements in currently-effective Reliability Standard 

TPL-007-1. 
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definition (12 V/km versus 8 V/km). These three new requirements largely mirror 

existing Requirements R4, R5, and R6 that currently apply, and continue to apply, only to 

benchmark GMD vulnerability and transformer thermal impact assessments.27

In addition, Reliability Standard TPL-007-2 includes two other new requirements, 

Requirements R11 and R12, that require applicable entities to gather GIC monitoring

data (Requirement R11) and magnetometer data (Requirement R12).

Reliability Standard TPL-007-2 modifies existing Requirement R7 (corrective 

action plans) to create a one-year deadline for the development of corrective action plans 

and two and four-year deadlines to complete actions involving non-hardware and 

hardware mitigation, respectively, for vulnerabilities identified in the benchmark GMD 

assessment. The modifications to Requirement R7 include a provision allowing for 

extension of deadlines if “situations beyond the control of the responsible entity 

determined in Requirement R1 prevent implementation of the [corrective action plan] 

within the timetable for implementation.”

E. NOPR

On May 17, 2018, the Commission issued a NOPR that proposed to approve 

Reliability Standard TPL-007-2 as the Reliability Standard largely addresses the 

directives in Order No. 830. However, the NOPR identified two aspects of Reliability 

 27 An exception is the qualifying threshold for transformers required to undergo 

thermal impact assessments: for the supplemental GMD assessment the qualifying 

threshold for transformers is a maximum effective GIC value of 85 A/phase while the 

threshold for benchmark GMD event assessments is 75 A/phase.
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Standard TPL-007-2 that are inconsistent with Order No. 830: (1) the lack of any 

requirement to develop and implement corrective action plans in response to assessed 

supplemental GMD event vulnerabilities; and (2) a general allowance, per proposed 

Requirement R7.4, of extensions of time to complete corrective action plans as opposed 

to permitting extensions of time on a case-by-case basis. 

Having identified these issues, the NOPR proposed to direct NERC, pursuant to 

section 215(d)(5) of the FPA, to develop and submit modifications to Reliability Standard 

TPL-007-2 to require applicable entities to develop and implement corrective action 

plans to mitigate vulnerabilities discovered through supplemental GMD vulnerability 

assessments. The NOPR proposed to direct NERC to submit the modified Reliability 

Standard for approval within 12 months from the effective date of Reliability Standard 

TPL-007-2. The NOPR also sought comment on two options for addressing the 

Commission’s concerns regarding the potential for undue delay of mitigation because of 

the proposed time-extension process in Requirement R7.4: (1) direct NERC to bring 

Reliability Standard TPL-007-2 into alignment with Order No. 830 through a process 

whereby NERC or Regional Entities consider extensions on a case-by-case basis using 

the information that must be submitted under Requirement R7.4; or (2) approve the 

proposed provision without directing modifications. Under either option, NERC would 

prepare and submit a report regarding how often and why applicable entities are 
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exceeding corrective action plan deadlines following implementation of Reliability 

Standard TPL-007-2.28

The Commission received NOPR comments from nine entities. We address below 

the issues raised in the NOPR and comments as well as NERC’s revised GMD research 

work plan and the comments submitted in response. The Appendix to this final rule lists 

the entities that filed comments in both matters.

II. Discussion

Pursuant to section 215(d)(2) of the FPA, the Commission approves Reliability 

Standard TPL-007-2 as just, reasonable, not unduly discriminatory or preferential, and in 

the public interest. We conclude that Reliability Standard TPL-007-2 is an improvement 

over currently-effective Reliability Standard TPL-007-1 and responds to the directives in 

Order No. 830: (1) to revise the benchmark GMD event definition, as it pertains to the 

required GMD Vulnerability Assessments and transformer thermal impact assessments, 

so that the definition is not based solely on spatially-averaged data; (2) to require the 

collection of necessary GIC monitoring and magnetometer data; and (3) to include a oneyear deadline for the completion of corrective action plans and two and four-year 

deadlines to complete mitigation actions involving non-hardware and hardware 

mitigation, respectively.29 

 28 The NOPR proposed that the report, under the first option, would also include 

statistics describing how often extension requests were granted.

29 In its petition, NERC stated that it would address the directive in Order No. 830 

on the collection of GIC monitoring and magnetometer data through a forthcoming 
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Reliability Standard TPL-007-2 complies with the directives in Order No. 830 by 

requiring, in addition to the benchmark GMD event vulnerability and thermal impact 

assessments, supplemental GMD vulnerability and thermal impact assessments. The 

supplemental GMD event definition in Reliability Standard TPL-007-2 contains a nonspatially-averaged reference peak geoelectric field amplitude component of 12 V/km, in 

contrast to the 8 V/km figure in the spatially-averaged benchmark GMD event definition. 

As NERC explains in its petition, the supplemental GMD event will be used to “represent 

conditions associated with localized enhancement of the geomagnetic field during a 

severe GMD event for use in assessing GMD impacts.”30 Reliability Standard TPL-007-

2 therefore addresses the Commission’s directive to modify currently-effective 

Reliability Standard TPL-007-1 so that the benchmark GMD event does not rely solely 

on spatially-averaged data to calculate the reference peak geoelectric field amplitude.

As proposed in the NOPR, pursuant to section 215(d)(5) of the FPA, we also 

determine that it is appropriate to direct NERC to develop and submit modifications to 

Reliability Standard TPL-007-2 to require the development and completion of corrective 

action plans to mitigate assessed supplemental GMD event vulnerabilities. Given that 

 

NERC data request to applicable entities pursuant to Section 1600 of the NERC Rules of 

Procedure rather than through a Reliability Standard requirement. NERC Petition at 27. 

On February 7, 2018, NERC released a draft data request for a 45-day comment period. 

The NERC Board of Trustees (BOT) subsequently approved the GMD data request at the 

August 2018 BOT meeting. 

30 NERC Petition at 12.
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NERC has acknowledged the potential for “severe, localized impacts” associated with 

supplemental GMD event vulnerabilities, we see no basis for requiring corrective action 

plans for benchmark GMD events but not for supplemental GMD events.

31 Based on the 

record in this proceeding, there appear to be no technical barriers to developing or

complying with such a requirement. Moreover, as discussed below, the record supports 

issuance of a directive at this time, notwithstanding NOPR comments advocating 

postponement of any directive until after the completion of additional GMD research,

because relevant GMD research is scheduled to be completed before the due date for 

submitting a modified Reliability Standard. The Commission therefore adopts the NOPR 

proposal and directs NERC to submit the modified Reliability Standard for approval 

within 12 months from the effective date of Reliability Standard TPL-007-2. 

We also determine, pursuant to section 215(d)(5) of the FPA, that it is appropriate 

to direct that NERC develop further modifications to Reliability Standard TPL-007-2, 

Requirement R7.4. Under NERC’s proposal, applicable entities are allowed, without 

prior approval, to exceed deadlines for completing corrective action plan tasks when 

“situations beyond the control of the responsible entity [arise].”32 Instead, as discussed 

 31 NERC Petition at 4 (“these revisions would enhance reliability by expanding 

GMD Vulnerability Assessments to include severe, localized impacts and by 

implementing new deadlines and processes to maintain accountability in the 

development, completion, and revision of entity Corrective Action Plans developed to 

address identified vulnerabilities”).

32 In the Supplemental Material section of Reliability Standard TPL-007-2, 

examples of situations beyond the control of the of the responsible entity include, but are 

not limited to, delays resulting from regulatory/legal processes, such as permitting; delays 
Docket Nos. RM18-8-000 and RM15-11-003 - 20 -

below, we direct NERC to develop a timely and efficient process, consistent with the 

Commission’s guidance in Order No. 830, to consider time extension requests on a caseby-case basis. Our directive balances the availability of time extensions when applicable 

entities are presented with the types of uncontrollable delays identified in NERC’s 

petition and NOPR comments with the need to ensure that the mitigation of known GMD 

vulnerabilities is not being improperly delayed through such requests. Further, as 

proposed in the NOPR, we direct NERC to prepare and submit a report addressing how 

often and why applicable entities are exceeding corrective action plan deadlines as well 

as the disposition of time extension requests. The report is due within 12 months from 

the date on which applicable entities must comply with the last requirement of Reliability 

Standard TPL-007-2. Following receipt of the report, the Commission will determine 

whether further action is necessary.

The Commission, as discussed below, also accepts the revised GMD research 

work plan submitted by NERC on April 19, 2018.

A. Corrective Action Plan for Supplemental GMD Event Vulnerabilities

NOPR

The NOPR proposed to determine that the absence of a requirement to mitigate 

assessed supplemental GMD event vulnerabilities is inconsistent with Order No. 830, and 

Order No. 779, because the proposal does not require “owners and operators [to] develop 

 

resulting from stakeholder processes required by tariff; delays resulting from equipment 

lead times; or delays resulting from the inability to acquire necessary Right-of-Way.
Docket Nos. RM18-8-000 and RM15-11-003 - 21 -

and implement a plan to protect against instability, uncontrolled separation, or cascading 

failures of the Bulk-Power System.”33

The NOPR explained that the Commission was not persuaded by NERC’s 

justification that technical limitations—specifically the small number of observations 

used to define the supplemental GMD event and the availability of modeling tools to 

assist entities in assessing vulnerabilities—make requiring mitigation premature at this 

time.34 The NOPR, instead, accepted NERC’s statement that the supplemental GMD 

event definition “provides a technically justified method of assessing vulnerabilities to 

the localized peak effects of severe GMD events.”35 The NOPR also observed that 

mitigation of supplemental GMD event vulnerabilities is appropriate because Reliability 

Standard TPL-007-2: (1) does not prescribe how applicable entities must perform such 

studies, and thus may incorporate any uncertainties regarding the geographic size of such 

events into their studies; (2) there are commercially-available tools that could allow for 

modeling of supplemental GMD events; and (3) other methods could be used within the 

framework of the Reliability Standard to study planning areas (e.g., superposition or 

sensitivity studies) in conjunction with other power system modeling tools. The NOPR 

further recognized that research tasks under way pursuant to the GMD research work 

 33 NOPR, 163 FERC ¶ 61,126 at P 32.

34 The Commission also rejected the assertion in NERC’s petition that an

evaluation of possible actions for supplemental GMD events that result in Cascading is 

similar to the treatment of extreme events in Reliability Standard TPL-001-4 

(Transmission System Planning Performance Requirements). 

35 NOPR, 163 FERC ¶ 61,126 at P 35 (quoting NERC Petition at 13).
Docket Nos. RM18-8-000 and RM15-11-003 - 22 -

plan that are relevant to the supplemental GMD event definition are scheduled to be 

completed in 2019 and the results of such research should inform the work of the 

standard drafting team.

Comments

NERC does not support the proposed directive. NERC maintains that the 

provision in Requirement R8.3 that requires applicable entities to evaluate possible 

actions designed to reduce the likelihood or mitigate the adverse impacts of a 

supplemental GMD event “is not merely advisory, but rather supports a range of potential 

mitigating actions, such as additional hardware mitigation, operating procedures, or other 

resilience actions to enhance recovery and restoration.”36 NERC expounds on this by 

noting that the requirement to consider mitigation in Reliability Standard TPL-007-2 

“would directly support mitigation that is required by [Reliability Standard EOP-010-

1].”37 NERC also contends that it “anticipates that the Corrective Action Plans, when 

needed to address performance requirements for the benchmark GMD event, will also 

provide a large degree of protection to the Bulk-Power System for events with locallyenhanced geomagnetic fields.”38

NERC’s comments reiterate the rationale in its petition that requiring mitigation 

“would result in the de facto replacement of the benchmark GMD event with the 

 36 NERC Comments at 9.

37 Id. at 10.

38 Id. at 11.
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proposed supplemental GMD event.”39 NERC maintains that “while the supplemental 

GMD event is strongly supported by data and analysis in ways that mirror the benchmark 

GMD event, there are aspects of it that are less definitive than the benchmark GMD event 

and less appropriate as the basis of requiring Corrective Action Plans.”40 NERC also 

claims that the uncertainty of geographic size of the supplemental GMD event could not 

be addressed adequately by sensitivity analysis or through other methods because there 

are “inherent sources of modeling uncertainty (e.g., earth conductivity model, substation 

grounding grid resistance values, transformer thermal and magnetic response models) ... 

[and] introducing additional variables for sensitivity analysis, such as the size of the

localized enhancement, may not improve the accuracy of GMD Vulnerability 

Assessments.”41 NERC further states that “commercially-available modeling tools now 

advertise capabilities that could be used to model localized GMD enhancements, [but] to 

NERC’s knowledge these capabilities have not been used extensively by planners, nor 

have the different software tools been benchmarked for consistency in results.”42 

NERC contends that completing the GMD work plan is a better alternative to 

the NOPR directive. Moreover, NERC states that it “commits to initiate a review of 

 39 Id. at 11-12; see also id. at 14 (“many entities would likely employ the most 

conservative approach for conducting supplemental GMD Vulnerability Assessments, 

which would be to apply extreme peak values uniformly over an entire planning area”).

40 Id. at 13.

41 Id. at 15.

42 Id.
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TPL-007-2 following the completion of the GMD Research Work Plan to evaluate 

whether the standard continues to be supported by the available knowledge or whether 

additional refinements are necessary ... [which] could result in modifications to, or 

additional support for, the proposed supplemental GMD event, and thereby inform what 

the TPL-007 standard should require in terms of mitigation based on supplemental GMD 

Vulnerability Assessments.”43 In response to the NOPR’s statement that the results of 

the GMD research work plan may inform the work of the standard drafting team tasked 

with carrying out the Commission’s proposed directive, NERC comments state that “it 

expects that the last of the project’s deliverables will be ready by early 2020 ... [but] 

[a]ny scientific research project schedule, however, must account for the possibility that 

additional time may be needed to explore potential findings or amend project approaches 

to provide more useful results.”44 NERC states that while the technical report for Task 1 

is scheduled to be completed by the fourth quarter of 2019 according to the revised GMD 

research work plan, NERC estimates that it will file a report with the Commission, after 

allowing a period of public comment, six months later (i.e., mid-2020).45

 43 Id. at 18.

44 Id. at 17.

45 Revised GMD Research Work Plan at 5 (“NERC expects to submit 

[informational filings with the Commission] approximately six months following EPRI’s 

completion of the associated technical report(s)”); id., Attachment 1 (Order No. 830 

GMD Research Work Plan (April 2018)) at 7 (identifying “Q4 2019” as the estimated 

completion date of “Final technical report to provide additional technical support for the 

existing supplementary (localized) benchmark; or, propose update to the benchmark, as 

appropriate”).
Docket Nos. RM18-8-000 and RM15-11-003 - 25 -

Trade Associations, Idaho Power, NE ISO, TVA and BPA do not support the 

proposed directive. They contend that requiring corrective action plans for supplemental 

GMD event vulnerabilities: (1) may be premature given the limited data regarding 

localized GMD events; (2) would address low-probability events that are unlikely to 

affect a wide area; and (3) could impose costs on applicable entities that outweigh the 

potential benefits of such a directive. Like NERC, these commenters support completing 

the GMD research work plan before considering mandating corrective action plans for 

supplemental GMD event vulnerabilities. Idaho Power, moreover, contends that it would 

be better for registered entities to gain experience with corrective action plans for 

benchmark GMD events before mandating corrective action plans for supplemental GMD 

events. Trade Associations state that instead of the NOPR directive, any Commission 

directive should be limited to requiring NERC to develop “a study of the mitigation 

measures deployed and the effectiveness of these measures to mitigate benchmark GMD 

events before mandating mitigation measures on more localized events.”46 Similarly, 

BPA maintains that instead of the NOPR directive, in order to assess the costs and 

benefits of requiring corrective action plans for supplemental GMD events, the 

Commission should require NERC to file periodic reports on supplemental GMD events 

and the possible actions to mitigate them. 

 46 Trade Associations Comments at 12.
Docket Nos. RM18-8-000 and RM15-11-003 - 26 -

Resilient Societies and Reclamation support the NOPR directive. Reclamation 

states, and Resilient Societies concurs, that “[a]n exercise to only identify vulnerabilities 

arising from localized GMD events is not a cost-effective use of resources unless 

accompanied by activities to mitigate the identified vulnerabilities.”47

Commission Determination

Pursuant to section 215(d)(5) of the FPA, the Commission adopts the NOPR 

proposal and directs NERC to develop and submit modifications to Reliability Standard 

TPL-007-2 to require corrective action plans for assessed supplemental GMD event 

vulnerabilities. While Reliability Standard TPL-007-2 requires applicable entities to 

assess supplemental GMD event vulnerabilities, it does not require corrective action 

plans to address assessed vulnerabilities. Instead, Reliability Standard TPL-007-2, 

Requirement R8.3 only requires applicable entities to make “an evaluation of possible 

actions to reduce the likelihood or mitigate the consequences and adverse impacts of the 

events if a supplemental GMD event is assessed to result in Cascading.” As the 

Commission observed in the NOPR, NERC’s proposal differs significantly from Order 

No. 830 because the intent of the directive was not only to identify vulnerabilities arising 

from localized GMD events but also to mitigate such vulnerabilities.

The comments opposing the NOPR directive offer two rationales for approving 

Reliability Standard TPL-007-2 without directing modifications at this time: (1) 

Reliability Standard TPL-007-2 provides sufficient protection against supplemental GMD 

 47 Reclamation Comments at 1; Resilient Societies Comments at 3.
Docket Nos. RM18-8-000 and RM15-11-003 - 27 -

event vulnerabilities; and (2) requiring mitigation of supplemental GMD events is 

premature at this time.

With respect to the first rationale, NERC observes that the provision requiring 

applicable entities to consider supplemental GMD event mitigation is not “merely 

advisory.” However, there is no dispute that an applicable entity must “consider” 

mitigation under Reliability Standard TPL-007-2. What is significant is that after having 

done so, an applicable entity has no obligation under Reliability Standard TPL-007-2 to 

implement mitigation even if the applicable entity “considered” mitigation necessary to 

address an assessed supplemental GMD event vulnerability. 

NERC also maintains that Reliability Standard EOP-010-1 requires transmission 

operators to “develop, maintain, and implement a GMD Operating Procedure or 

Operating Process to mitigate the effects of GMD events on the reliable operation of its 

respective system.” And in Order No. 779, the Commission determined that “while the 

development of the required mitigation plan [for benchmark GMD event vulnerabilities] 

cannot be limited to considering operational procedures or enhanced training alone, 

operational procedures and enhanced training may be sufficient if that is verified by the 

vulnerability assessments.”48 Again, NERC’s point does not resolve the Commission’s 

concern because Reliability Standard EOP-010-1 does not ensure mitigation of all 

supplemental GMD event vulnerabilities assessed under Reliability Standard TPL-007-2. 

That is because: (1) Reliability Standard EOP-010-1 applies, in relevant part, only to 

 48 Order No. 779, 143 FERC ¶ 61,147 at P 83.
Docket Nos. RM18-8-000 and RM15-11-003 - 28 -

transmission operators (viz., it does not apply to other applicable entity types, such as 

planning coordinators, transmission planners and generator owners, subject to Reliability 

Standard TPL-007-2); and (2) Reliability Standard EOP-010-1 does not require 

mitigation if the supplemental GMD event vulnerability cannot be addressed through 

operational procedures or enhanced training alone. Thus, Reliability Standard EOP-010-

1 does not ensure satisfactory mitigation or provide an adequate substitute for mitigation 

as contemplated in Order No. 830.

In addition, NERC asserts that the required mitigation of benchmark GMD event 

vulnerabilities could also address supplemental GMD event vulnerabilities. Of course 

that may occur in some circumstances, but that is not a substitute for requiring mitigation 

to the extent that benchmark GMD event mitigation does not completely address a 

supplemental GMD event vulnerability. Under Reliability Standard TPL-007-2 there is 

currently no requirement to mitigate the remaining vulnerability to the Bulk-Power 

System.

Regarding the second rationale in the NOPR comments, NERC and other 

commenters reiterate the assertion in NERC’s petition that it would be premature, from a 

technical standpoint, to require corrective action plans to address supplemental GMD 

event vulnerabilities. As reflected in the comment summary, these commenters instead 

request that NERC complete the GMD research work plan and then produce a report that 

assesses the possible need for modifications to Reliability Standard TPL-007-2. 

The NOPR discussed how a standard drafting team could use new information 

gathered through the GMD research work plan to develop a modified Reliability 
Docket Nos. RM18-8-000 and RM15-11-003 - 29 -

Standard. The Commission noted that Task 1 of the GMD research work plan (Further 

Analyze Spatial Averaging Used in the Benchmark GMD Event), which encompasses 

localized GMD event research, would be delivered in 2019 according to the most recent 

version of the GMD research work plan (i.e., the revised GMD research work plan). The 

NOPR stated that “[s]uch GMD research on localized events should inform the standard 

development process and aid applicable entities when implementing a modified 

Reliability Standard.”49 While we appreciate that the informational filing for Task 1 may 

not be submitted to the Commission prior to the deadline for submitting a modified 

Reliability Standard, the underlying research in Task 1 is scheduled to be completed 

before then. As such, the standard drafting team and personnel working on the GMD 

research work plan could operate in parallel and share information to ensure that research 

relevant to the Commission’s directive is incorporated into the modified Reliability 

Standard. Thus we are not persuaded by the comments seeking a delay of our directive.

We are not persuaded by the other points raised by commenters to support their 

assertion that requiring corrective action plans is premature. First, NERC assumes that 

under such a requirement “many” applicable entities will adopt a “conservative 

approach” and use the supplemental GMD event definition in all GMD vulnerability 

assessments, thus effectively supplanting the benchmark GMD event definition. NERC 

bases this assumption on the standard drafting team’s “extensive experience in system 

 49 NOPR, 163 FERC ¶ 61,126 at P 39.
Docket Nos. RM18-8-000 and RM15-11-003 - 30 -

planning and the relative immaturity of tools and methods for modeling localized 

enhancements.”50 NERC acknowledges the discussion in the NOPR on how 

uncertainties regarding the supplemental GMD event definition—in particular the 

geographic size of localized events—are ameliorated by the flexibility afforded by 

Reliability Standard TPL-007-2. Specifically, Reliability Standard TPL-007-2 permits 

applicable entities to apply the supplemental GMD event definition to an entire planning 

area or any subset of a planning area. However, NERC asserts that even with this 

flexibility, at least some applicable entities would default to using the supplemental GMD 

event definition in an overly-broad manner. Notwithstanding NERC’s assertion, nothing 

in Reliability Standard TPL-007-2 requires applicable entities to apply the supplemental 

GMD event definition to an entire planning area or otherwise supplant the benchmark 

GMD event definition.

With respect to the statement in the NOPR that modeling tools are currently 

available to support corrective action plans, NERC admits that “some commerciallyavailable modeling tools now advertise capabilities that could be used to model localized 

GMD enhancements.”51 However, NERC contends that to its “knowledge these 

capabilities have not been used extensively by planners, nor have the different software 

tools been benchmarked for consistency in result.”52 Given that GMDs have only 

recently been addressed in the Reliability Standards and there is currently no requirement 

 50 NERC Comments at 14.

51 Id. at 15.

52 Id. at 15-16.
Docket Nos. RM18-8-000 and RM15-11-003 - 31 -

to model and assess, let alone mitigate, localized GMD events, it is not unexpected that 

these modeling tools have not been used extensively for that purpose. Moreover, NERC 

does not assert that existing tools are incapable of performing the desired modeling 

function.53 Thus, NERC’s objections on this point are not persuasive. 

NERC does not offer support for its comment in response to the NOPR’s 

observation that sensitivity analysis can serve, among other methods, as a method to 

refine the geographic scope of localized GMD impacts on planning areas. NERC 

responds that it “does not believe that concerns regarding the uncertainty of the 

geographic size of the supplemental GMD event could be addressed adequately by 

sensitivity analysis or though other methods in planning studies.”54 NERC claims there 

are already inherent sources of modeling uncertainty and that introducing another 

variable, such as the size of the localized enhancement, “may not improve the accuracy of 

the GMD Vulnerability Analysis.”55 And yet NERC’s concern implies that the 

benchmark GMD event contains a geographic domain that does not itself inject 

uncertainties. However, as the Commission stated in Order No. 830, the geographic area 

for spatial averaging in the benchmark GMD event definition is itself a “subjective” 

 53 See also Trade Associations Comments at 8 (“Although current tools are 

available to model localized events, we understand that such modeling will require 

significant time as the processes involved are still largely manual, making it difficult to 

develop accurate, system-wide models that appropriately consider the localized impacts 

of the supplemental GMD event.”).

54 NERC Comments at 15.

55 Id.
Docket Nos. RM18-8-000 and RM15-11-003 - 32 -

figure.56 Indeed, in Order No. 830, as part of the GMD research work plan directive, to 

address the uncertainties surrounding the geographic scale of spatial averaging, the 

Commission directed that NERC should “further analyze the area over which spatial 

averaging should be calculated for stability studies, including performing sensitivity 

analyses on squares less than 500 km per side (e.g., 100 km, 200 km),” which NERC is 

addressing in Task 1.57 As such, we see no basis, technical or otherwise, for not 

requiring corrective action plans for assessed supplemental GMD event vulnerabilities 

while requiring corrective action plans for assessed benchmark GMD event 

vulnerabilities consistent with the Commission’s directions in Order Nos. 779 and 830. 

Accordingly, the Commission is not persuaded by the arguments of NERC and other 

commenters for the reasons discussed above, and directs that NERC develop 

modifications to Reliability Standard TPL-007-2 to require corrective action plans for 

assessed supplemental GMD event vulnerabilities. 

B. Corrective Action Plan Deadline Extensions

NOPR

 56 Order No. 830, 156 FERC ¶ 61,215 at P 45 (quoting Pulkkinen, A., Bernabeu, 

E., Eichner, J., Viljanen, A., Ngwira, C., “Regional-Scale High-Latitude Extreme 

Geoelectric Fields Pertaining to Geomagnetically Induced Currents,” Earth, Planets and 

Space at 2 (June 19, 2015)).

57 Id. P 26; see also revised GMD Research Work Plan (Task 1) at 6 (“further 

analyze the area over which spatial averaging should be used in stability studies and 

transformer thermal assessments by performing GIC analysis on squares less than 500 km 

per side (e.g., 100 km, 200 km) and using the results to perform power flow and 

transformer thermal assessments”).
Docket Nos. RM18-8-000 and RM15-11-003 - 33 -

The NOPR stated that Requirement R7.4 of Reliability Standard TPL-007-2 

differs from Order No. 830 by allowing applicable entities to “revise” or “update” 

corrective action plans to extend deadlines. This provision contrasts with the guidance in 

Order No. 830 that “NERC should consider extensions of time on a case-by-case basis.” 

While agreeing that there should be a mechanism for allowing extensions of corrective 

action plan implementation deadlines, the NOPR expressed concern with unnecessary 

delays in implementing protection against GMD threats. 

The NOPR identified two options for addressing Requirement R7.4. Under the 

first option, the Commission would, pursuant to section 215(d)(5) of the FPA, direct 

NERC to modify Reliability Standard TPL-007-2 to comport with Order No. 830, by 

requiring that NERC and the Regional Entities, as appropriate, consider requests for 

extension of time on a case-by-case basis. Under this option, responsible entities seeking 

an extension would submit the information required by Requirement R7.4 to NERC and 

the Regional Entities for their consideration of the request. The Commission would also 

direct NERC to prepare and submit a report addressing the disposition of any such 

requests, as well as information regarding how often and why applicable entities are 

exceeding corrective action plan deadlines following implementation of Reliability 

Standard TPL-007-2. Under such a directive, NERC would submit the report within 12 

months from the date on which applicable entities must comply with the last requirement 

of Reliability Standard TPL-007-2. Following receipt of the report, the Commission 

would determine whether further action is necessary. Under the second option, the 

Commission would approve proposed Requirement R7.4 but also direct NERC to prepare 
Docket Nos. RM18-8-000 and RM15-11-003 - 34 -

and submit the report described in the first option (without the statistics on disposition). 

Following receipt of the report, the Commission would determine whether further action 

is necessary.

Comments

NERC supports the second option in the NOPR. NERC contends that Reliability 

Standard TPL-007-2 “provides clarity and certainty regarding when an entity may extend 

a Corrective Action Plan mitigation deadline and what steps must be followed to 

maintain accountability and thus compliance with the standard.”58 NERC also maintains 

that the proposal “avoids the administrative burden, uncertainty, and further delay that 

could be associated with implementing a new ERO adjudication process, such as one that 

would be dedicated to evaluating GMD Corrective Action Plan deadline extensions on a 

case-by-case basis.”59 To address concerns regarding the possible abuse of deadline 

extensions, NERC states that as “part of the compliance monitoring and enforcement 

activities for the proposed standard, NERC and Regional Entity staff would exercise their 

authority to review the reasonableness of any Corrective Action Plan delay, including 

reviewing the ‘situations beyond the control of the responsible entity’ that are cited as 

causing the delay.”60 As noted in the Supplemental Material section of Reliability 

Standard TPL-007-2, NERC explains that examples of such situations include “lengthy 

 58 NERC Comments at 20.

59 Id.

60 Id. at 20-21.
Docket Nos. RM18-8-000 and RM15-11-003 - 35 -

legal or regulatory processes, stakeholder processes required by tariff, or long equipment 

lead times.”61 NERC, moreover, “agrees that a report describing the results of NERC’s 

monitoring of this provision could provide useful information ... [and] therefore commits 

to prepare and submit to the Commission a report that describes how often and the 

reasons why entities in the United States are exceeding Corrective Action Plan 

deadlines.”62

Trade Associations, BPA, ISO NE, Idaho Power, and TVA support the second 

option and echo the rationale for adopting the second option in NERC’s comments. 

Trade Associations explain that while they previously supported a case-by-case exception 

process, they now believe NERC’s proposal to be more efficient and effective. Trade 

Associations contend that a case-by-case approach would “only increase administrative 

tasks for NERC and applicable entities ... [and] would further delay any actions to 

mitigate rather than expedite the approval process.”63 Trade Associations also maintain 

that Reliability Standard TPL-007-2 “will not delay mitigation because this requirement 

is only applicable if circumstances are beyond the entity’s control.”64

Reclamation does not appear to support modifying Requirement R7 to institute a 

case-by-case time extension process. However, Reclamation comments that the subrequirement in Requirement R7.4.1 requiring documentation of reasons for delaying 

 61 Id. at 20.

62 Id. at 22.

63 Trade Associations Comments at 13.

64 Id.
Docket Nos. RM18-8-000 and RM15-11-003 - 36 -

corrective action plans should be eliminated because it “is merely a compliance exercise 

and does not improve Bulk Electric System reliability.” Reclamation makes the same 

contention regarding the sub-requirement in Requirement R7.4.2 that a revised corrective 

action plan describe the original corrective action plan.

Commission Determination

Reliability Standard TPL-007-2, Requirement R7.4 differs from Order No. 830 by 

allowing applicable entities, under certain conditions, to extend corrective action plan

implementation deadlines without prior approval. This conflicts with the Commission’s 

guidance in Order No. 830 that, using its compliance discretion, “NERC should consider 

extensions of time on a case-by-case basis.”65 Based on our consideration of the record, 

we believe that the case-by-case review process contemplated by Order No. 830 is the 

appropriate means for considering extension requests. Accordingly, pursuant to section 

215(d)(5) of the FPA, we direct that NERC develop modifications to Reliability Standard 

TPL-007-2 to replace the time-extension provision in Requirement R7.4 with a process 

through which extensions of time are considered on a case-by-case basis.

At the outset, we note that the extension process in Requirement R7.4 applies only 

to the implementation of corrective action plans and not to the development of corrective 

action plans.66 NERC and other commenters supportive of the second option in the 

 65 Order No. 830, 156 FERC ¶ 61,215 at P 102.

66 Reliability Standard TPL-007-2, Requirement R7.4 (“[t]he [corrective action 

plan] shall ... [b]e revised if situations beyond the control of the responsible entity ... 

prevent implementation of the [corrective action plan] within the timetable for 

implementation”).
Docket Nos. RM18-8-000 and RM15-11-003 - 37 -

NOPR urge approval of Requirement R7.4 without modification largely because of the 

perceived uncertainty and burden associated with treating extension requests on a caseby-case basis. While it is true that granting extensions on a case-by-case basis involves

more uncertainty and potential burdens versus the automatic extension of time afforded 

by Requirement R7.4, we must weigh this against the potential for abuse of Requirement 

R7.4 to unduly delay mitigation, as well as the delayed visibility that NERC would have 

into the deployment of needed GMD protections. Presented with these competing 

concerns, we conclude that the imperative to address known GMD vulnerabilities in a 

timely manner, and without unwarranted delays, is more compelling. We recognize that 

applicable entities that have a legitimate need for extensions require timely responses 

from NERC and Regional Entities, as appropriate. Accordingly, we expect that the 

extension process developed by NERC in response to our directive will be timely and 

efficient such that applicable entities will receive prompt responses after submitting to 

NERC or a Regional Entity, as appropriate, the extension request and associated 

information described in Requirement R7.4.67 

 In reaching our determination on this issue, we considered NERC’s NOPR 

comments, which attempted to address the concerns with Requirement R7.4 expressed in 

the NOPR, stating that NERC and Regional Entity compliance and enforcement staff will 

review the reasonableness of any delay in implementing corrective action plans, 

including reviewing the asserted “situations beyond the control of the responsible entity” 

 67 NOPR, 163 FERC ¶ 61,126 at P 50.
Docket Nos. RM18-8-000 and RM15-11-003 - 38 -

cited by the applicable entity, and by citing specific examples of the types of delays that 

might justify the invocation of Requirement R7.4. NERC’s comments also characterized

Requirement R7.4 as being “not so flexible ... as to allow entities to extend Corrective 

Action Plan deadlines indefinitely or for any reason whatsoever.”68 We generally agree 

with the standard of review that NERC indicates it will use to determine whether an 

extension of time to implement a corrective action plan is appropriate. However, the 

assessment of whether an extension of time is warranted is more appropriately made 

before an applicable entity is permitted to delay mitigation of a known GMD 

vulnerability. While NERC indicates that under proposed Requirement R7.4 there are 

compliance consequences for improperly delaying mitigation, mitigation of a known 

GMD vulnerability will nonetheless have been delayed, and we conclude it is important 

that any proposed delay be reviewed ahead of time. Therefore, we direct NERC to 

modify Reliability Standard TPL-007-2, Requirement R7.4 to develop a timely and 

efficient process, consistent with the Commission’s guidance in Order No. 830, to 

consider time extension requests on a case-by-case basis. 

We disagree with Reclamation’s comment regarding Requirement R7.4.1, which 

requires a description of the circumstances necessitating mitigation delays, because it is 

at odds with NERC’s NOPR comments, discussed above, in which NERC states that 

NERC and Regional Entities will review the reasons for delaying mitigation. Contrary to 

Reclamation’s assertion that this requirement is “merely a documentation exercise and 

 68 NERC Comments at 20.
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does not improve [bulk electric system] reliability,” unreasonable delays of mitigation 

could harm bulk electric system reliability by leaving it vulnerable to GMDs. Moreover, 

Requirement R7.4.2, also opposed by Reclamation, requiring that revised corrective 

action plans describe the original and previous revisions, provides compliance 

enforcement authorities with a revision history of the corrective action plan in a single 

document, thus facilitating compliance review.

C. Other Issues Raised in NOPR Comments

Resilient Societies’ comments raise three issues not addressed in the NOPR. First, 

Resilient Societies maintains that transformers that experience an estimated GIC above 

15 A/phase should be subject to mandatory corrective action plans and the Commission 

should “encourage owner-operators and their research partners to develop ‘Corrective 

Action Plans’ for both [extra high voltage] transformers and for associated generation 

stations, even if these long replacement-time systems experience overstress at levels 

significantly below 75 amps per phase.” Second, Resilient Societies states that the 

Commission should encourage best practices by industry beyond the mandatory 

requirements of the Reliability Standards, including allowing cost recovery for such 

practices. Third, Resilient Societies states that the Commission should address combined 

GMD and electromagnetic pulse (EMP) protection.

In Order No. 830, the Commission approved the 75 A/phase threshold in 

Reliability Standard TPL-007-1 based on the record and despite objections from certain 

commenters. The Commission, however, directed further study of this issue as part of 

the GMD research work plan. Resilient Societies’ comments provide no new basis for 
Docket Nos. RM18-8-000 and RM15-11-003 - 40 -

revisiting this issue at this time. Moreover, as reflected in the NOPR proposal, NERC 

has adequately supported the 85 A/phase threshold proposed in Reliability Standard TPL007-2 for the supplemental GMD event analysis. However, new information resulting 

from the GMD research work plan will also be relevant to this higher threshold. We will 

consider such research at the appropriate time.

In Order No. 830, the Commission stated that “cost recovery for prudent costs 

associated with or incurred to comply with Reliability Standard TPL-007-1 and future 

revisions to the Reliability Standard will be available to registered entities.”69 It is 

therefore beyond the scope of this proceeding to determine, as a general matter, whether 

voluntary measures beyond those required to comply with the governing Reliability 

Standards are eligible for cost recovery. That said, jurisdictional entities may of course 

pursue such voluntary measures, and the Commission would consider appropriate cost 

recovery for those investments through a formula rate or other rate proceeding. 

The Commission in previous orders has indicated that the Commission’s GMD 

proceedings are not directed to EMPs and thus Resilient Societies’ comments on EMP 

are out-of-scope.70

 69 Order No. 830, 156 FERC ¶ 61,215 at P 24.

70 See, e.g., Order No. 830, 156 FERC ¶ 61,215 at P 119.
Docket Nos. RM18-8-000 and RM15-11-003 - 41 -

D. Revised GMD Research Work Plan

On April 19, 2018, NERC submitted a revised GMD research work plan in 

response to a Commission order issued on October 19, 2017.71 In the October 19 Order, 

the Commission accepted the initial GMD research work plan filed by NERC on May 30, 

2017. The Commission also directed NERC to file a final GMD research work plan 

within six months and ensure that the final GMD research work plan included a 

reevaluation of reliance on single station readings when adjusting for latitude as part of 

the benchmark GMD event definition. At NERC’s request, the October 19 Order also 

provided guidance on how NERC should prioritize the tasks in the GMD research work 

plan.

Bardin and Resilient Societies submitted comments in response to the revised 

GMD research work plan, which largely focused on a request for combined research on 

GMDs and EMPs. As discussed above, however, EMPs are outside the scope of the 

Commission’s directive regarding GMD research. Resilient Societies also submitted 

comments criticizing aspects of five tasks in the revised GMD research work plan. With 

respect to Tasks 1, 2, 8 and 9, Resilient Societies’ criticism is based on the contention 

that the “real-world data” will not be used to verify models. For example, Resilient 

Societies contends that NERC will not use “real-world” GIC data to validate spatial 

averaging (Task 1) or latitude scaling (Task 2). These assertions, however, are refuted by 

 71 Reliability Standard for Transmission System Planned Performance for 

Geomagnetic Disturbance Events, 161 FERC ¶ 61,048 (2017) (October 19 Order).
Docket Nos. RM18-8-000 and RM15-11-003 - 42 -

the revised GMD research work plan. The revised GMD research work plan indicates 

that the research on spatial averaging includes an analysis of “a large number (10-20) of 

localized extreme events and collection of both ground-based and space-based data 

around the times of these events.”72 For latitude scaling, the revised GMD research work 

plan states that NERC will evaluate the scaling factor “using existing models and 

developing new models to extrapolate, from historical data, the potential scaling of a 

1-in-100 year GMD event on lower geomagnetic latitudes.”73 In addition, NERC 

indicates that the data gathered through the Section 1600 data request “will help validate 

various models used in calculating GIC’s and assessing their impacts in data systems.”74 

Resilient Societies other comments are directed to an alleged lack of specificity, 

granularity or “scientific assurance” in the testing described in Tasks 5, 8 and 9 of the 

revised GMD research work plan. These criticisms are misplaced as they demand an 

unreasonable degree of detail in the revised GMD research work plan. For example, 

regarding Task 5, NERC states that it will “validate[e] existing transformer tools with all 

data that is presently available and with upcoming field/laboratory test results.”75 

Resilient Societies, however, contends unpersuasively that “NERC neglects to specify 

 72 Revised GMD Research Work Plan, Attachment 1 (Order No. 830 GMD 

Research Work Plan (April 2018)) at 2.

73 Id. at 8.

74 Id. at 19.

75 Id. at 17.
Docket Nos. RM18-8-000 and RM15-11-003 - 43 -

‘all data that is presently available’ ... and the number of transformers to be employed in 

‘upcoming field laboratory test results’ and also neglects to disclose details of the test 

protocols to be used.”76 Regarding harmonics (Tasks 8 and 9), Task 9 specifically 

includes “tank vibration measurements,” not just simulations.77 Moreover, Task 8 

(Improving Harmonic Analysis Capabilities) is intended to develop more basic 

information than some of the other tasks in the revised GMD research work plan where 

industry has more knowledge. As with all of the revised GMD research work plan tasks 

(with the exception of Task 6, which deals with the Section 1600 data request), NERC 

will submit a report to the Commission on its findings.

As the revised GMD research work plan complies with Order No. 830 and the 

Commission’s October 19 Order, we accept the revised GMD research work plan.

III. Information Collection Statement

The collection of information contained in this final rule is subject to review by 

the Office of Management and Budget (OMB) under section 3507(d) of the Paperwork 

Reduction Act of 1995.78 OMB’s regulations require review and approval of certain 

information collection requirements imposed by agency rules.79 Upon approval of a 

collection of information, OMB will assign an OMB control number and an expiration 

 76 Resilient Societies Comments on Revised GMD Research Work Plan at 11.

77 Id. at 25.

78 44 U.S.C. 3507(d).

79 5 CFR 1320 (2018).
Docket Nos. RM18-8-000 and RM15-11-003 - 44 -

date. Respondents subject to the information collection requirements of a rule will not be 

penalized for failing to respond to the collection of information unless the collection of 

information displays a valid OMB control number. 

In the NOPR, the Commission solicited comments on the need for this 

information, whether the information will have practical utility, the accuracy of the 

burden estimates, ways to enhance the quality, utility, and clarity of the information to be 

collected or retained, and any suggested methods for minimizing respondents’ burden, 

including the use of automated information techniques. Specifically, the Commission 

asked that any revised burden or cost estimates submitted by commenters be supported 

by sufficient detail to understand how the estimates were generated. The Commission 

did not receive any comments regarding the Commission’s burden estimates.

The Commission approves Reliability Standard TPL-007-2, which replaces 

currently-effective Reliability Standard TPL-007-1. When compared to Reliability 

Standard TPL-007-1, Reliability Standard TPL-007-2 maintains the current information 

collection requirements, modifies existing Requirements R1 through R7 and adds new 

requirements in Requirements R8 through R12. 

Reliability Standard TPL-007-2 includes new corrective action plan development 

and implementation deadlines in Requirement R7, new supplemental GMD vulnerability 

and transformer thermal impact assessments in Requirements R8 through R10, and 

requirements for applicable entities to gather magnetometer and GIC monitored data in 

Requirements R11 and R12. Deadlines in Requirement R7 for the development and 

implementation of corrective action plans would only change the timeline of such 
Docket Nos. RM18-8-000 and RM15-11-003 - 45 -

documentation and are not expected to revise the burden to applicable entities. The 

burden estimates for new Requirements R8 through R10 are expected to be similar to the 

burden estimates for Requirements R4 through R6 in currently-effective Reliability 

Standard TPL-007-1 due to the closely-mirrored requirements.80 The Commission 

expects that only 25 percent or fewer of transmission owners and generator owners would 

have to complete a supplemental transformer thermal impact assessment per Requirement 

R10. Requirements R11 and R12 require applicable entities to have a process to collect 

GIC and magnetometer data from meters in planning coordinator planning areas.

Public Reporting Burden: The burden and cost estimates below are based on the changes 

to the reporting and recordkeeping burden imposed by Reliability Standard TPL-007-2. 

Our estimates for the number of respondents are based on the NERC Compliance 

Registry as of March 3, 2018, which indicates there are 183 entities registered as 

transmission planner (TP), 65 planning coordinators (PC), 330 transmission owners (TO), 

944 generator owners (GO) within the United States. However, due to significant 

overlap, the total number of unique affected entities (i.e., entities registered as a 

transmission planner, planning coordinator, transmission owner or generator owner, or 

some combination of these functional entities) is 1,130 entities. This includes 188 

entities that are registered as a transmission planner or planning coordinator (applicability 

for Requirements R7 to R9 and R11 to R12), and 1,119 entities registered as a 

transmission or generation owner (applicability for Requirement R10). Given the 

 80 NERC Petition at 14-17.
Docket Nos. RM18-8-000 and RM15-11-003 - 46 -

assumption above, there is an expectation that at most only 25 percent of the 1,119 

entities (or 280 entities) will have to complete compliance activities for Requirement 

R10. The estimated burden and cost are as follow.81

FERC-725N, Changes Due to Final Rule in Docket No. RM18-882, 83

Requirem

ent (R)

Number 

and Type 

of 

Responde

nts

(1)

Annual 

Number 

of 

Responses 

Per 

Responde

nt 

(2)

Total No. 

of 

Responses

(1)X(2)=(

3)

Average 

Burden 

Hrs. & 

Cost per 

Response

(4)

Total 

Annual 

Burden 

Hrs. & 

Total 

Annual 

Cost 

(rounded)

Cost per 

Responde

nt ($)

(5)÷(1)

 81 Hourly costs are based on the Bureau of Labor Statistics (BLS) figures for May 

2017 (Sector 22, Utilities) for wages (https://www.bls.gov/oes/current/naics2_22.htm) 

and benefits for December 2017 (https://www.bls.gov/news.release/ecec.nr0.htm). We 

estimate that an Electrical Engineer (NAICS code 17-2071) would perform the functions 

associated with reporting requirements, at an average hourly cost (for wages and benefits) 

of $66.90 The functions associated with recordkeeping requirements, we estimate, would 

be performed by a File Clerk (NAICS code 43-4071) at an average hourly cost of $32.04 

for wages and benefits. 

The estimated burden and cost are in addition to the burden and cost that are 

associated with the existing requirements in Reliability Standard TPL-007-1 (and in the 

current OMB-approved inventory), which would continue under Reliability Standard 

TPL-007-2.

The requirements for NERC to provide reports to the Commission and to develop 

and submit modifications to Reliability Standard TPL-007-2 are already covered under 

FERC-725 (OMB Control No. 1902-0225).

82 Rep.=reporting requirements; RK =recordkeeping requirements (Evidence 

Retention).

83 For each Reliability Standard, the Measure shows the acceptable evidence 

(Reporting Requirement) for the associated Requirement (R numbers), and the 

Compliance section details the related Recordkeeping Requirement.
Docket Nos. RM18-8-000 and RM15-11-003 - 47 -

(3)X(4)=(

5)

R1 

through 

R684 No change No change No change No change No change No change

R7 188 

(PC and 

TP)

1/5 (once 

for every 

five year 

study) 37.6

Rep. 5 

hrs., 

$334.50; 

RK 5 hrs., 

$160.20

Rep. 188 

hrs.,

$12,577; 

RK 188 

hrs., 

$6,023

Rep. 1 hr., 

$66.90; 

RK 1 hr., 

$32.04

R8 188 

(PC and 

TP)

1/5 (once 

for every 

five year 

study) 37.6

Rep., 27 

hrs., 

$1,806.30;

RK, 21 

hrs., 

$672.84

Rep. 1,015 

hrs., 

$67,917; 

RK 790 

hrs., 

$25,299

Rep., 5.4 

hrs., 

$361.26; 

RK 4.2 

hrs., 

$134.57

R9 188 

(PC and 

TP)

1/5 (once 

for every 

five year 

study) 37.6

Rep. 9 

hrs., 

$602.10;

RK 7 hrs., 

$224.28

Rep. 338 

hrs., 

$22,639;

RK 263 

hrs., 

$8,432

Rep. 1.8 

hrs., 

$120.42; 

RK 1.4 

hrs., 

$44.85

R10

280

(25% of 

1,119)

(GO and 

TO)

1/5 (once 

for every 

five year 

study) 56

Rep. 22 

hrs., 

$1,471.80;

RK 18 

hrs.,

$576.72

Rep. 1,232 

hrs., 

$82,421; 

RK 1,008 

hrs., 

$32,296

Rep. 4.4 

hrs., 

$294.36; 

RK 3.6 

hrs., 

$115.34

R11 188 

(PC and 

TP)

1 (ongoing 

reporting) 188

Rep. 10 

hrs., $669;

RK. 10 

hrs., 

$320.40

Rep. 1,880 

hrs., 

$125,772; 

RK 1,880 

hrs., 

$60,235

Rep. 10 

hrs., $669; 

RK 10 

hrs., 

$320.40

 84 While Reliability Standard TPL-007-2 extends the requirements in existing 

Reliability Standard TPL-007-1, Requirements R1 through R3 to the newly required 

supplemental GMD event analyses, the obligation to conduct the supplemental GMD 

event analyses is found in Reliability Standard TPL-007-2, Requirements R8 through 

R10.
Docket Nos. RM18-8-000 and RM15-11-003 - 48 -

R12 188 

(PC and 

TP)

1 (ongoing 

reporting) 188

Rep. 10 

hrs., $669;

RK. 10

hrs.,

320.40

Rep. 1,880 

hrs. 

$125,772; 

RK 1,880 

hrs.,

$60,235

Rep. 10 

hrs., $669; 

RK 10 

hrs., 

$320.40

Total 

Additional 

Hrs. and 

Cost 

(rounded), 

due to 

Final Rule 

in RM18-8 

Rep., 

6,533

hrs., 

$437,057; 

RK 6,009

hrs., 

$192,528

Title: FERC-725N, Mandatory Reliability Standards: TPL Reliability Standards

Action: Revisions to an existing collection of information

OMB Control No: 1902-0264

Respondents: Business or other for profit, and not for profit institutions.

Frequency of Responses:

85 Every five years (for Requirement R7-R10), annually (for 

Requirement R11 and R12), and ongoing.

Necessity of the Information: Reliability Standard TPL-007-2 implements the 

Congressional mandate of the Energy Policy Act of 2005 to develop mandatory and 

enforceable Reliability Standards to better ensure the reliability of the nation’s BulkPower System. Specifically, these requirements address the threat posed by GMD events 

 85 The frequency of Requirements R1 through R6 in Reliability Standard TPL007-2 is unchanged from the existing requirements in Reliability Standard TPL-007-1. 
Docket Nos. RM18-8-000 and RM15-11-003 - 49 -

to the Bulk-Power System and conform to the Commission’s directives to modify 

Reliability Standard TPL-007-1 as directed in Order No. 830. 

Internal review: The Commission has reviewed Reliability Standard TPL-007-2, and 

made a determination that its action is necessary to implement section 215 of the FPA. 

The Commission has assured itself, by means of its internal review, that there is specific, 

objective support for the burden estimates associated with the information requirements.

Interested persons may obtain information on the reporting requirements by 

contacting the Federal Energy Regulatory Commission, Office of the Executive Director, 

888 First Street, NE, Washington, DC 20426 [Attention: Ellen Brown, e-mail: 

DataClearance@ferc.gov, phone: (202) 502-8663, fax: (202) 273-0873]. 

Comments concerning the collection of information and the associated burden 

estimate should be sent to the Commission in this docket and may also be sent to the 

Office of Information and Regulatory Affairs, Office of Management and Budget, 725 

17th Street, NW, Washington, DC 20503 [Attention: Desk Officer for the Federal 

Energy Regulatory Commission]. Due to security concerns, comments should be sent 

electronically to the following e-mail address: oira_submission@omb.eop.gov. 

Comments submitted to OMB should refer to FERC-725N and OMB Control No. 1902-

0264.

IV. Environmental Analysis

The Commission is required to prepare an Environmental Assessment or an 

Environmental Impact Statement for any action that may have a significant adverse effect 
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on the human environment.86 The Commission has categorically excluded certain actions 

from this requirement as not having a significant effect on the human environment. 

Included in the exclusion are rules that are clarifying, corrective, or procedural or that do 

not substantially change the effect of the regulations being amended.87 The actions here 

fall within this categorical exclusion in the Commission’s regulations.

V. Regulatory Flexibility Act

The Regulatory Flexibility Act of 1980 (RFA)88 generally requires a description 

and analysis of proposed rules that will have significant economic impact on a substantial 

number of small entities. The definition of small business is provided by the Small 

Business Administration (SBA) at 13 CFR 121.201. The threshold for a small utility 

(using SBA’s sub-sector 221) is based on the number of employees for a concern and its 

affiliates. As discussed above, Reliability Standard TPL-007-2 applies to a total of 1,130 

unique planning coordinators, transmission planners, transmission owners, and 

generation owners.89 A small utility (and its affiliates) is defined as having no more than

 86 Regulations Implementing the National Environmental Policy Act of 1969, 

Order No. 486, FERC Stats. & Regs. ¶ 30,783 (1987) (cross-referenced at 41 FERC 

¶ 61,284).

87 18 CFR 380.4(a)(2)(ii) (2018).

88 5 U.S.C. 601-12.

89 In the NERC Registry, there are approximately 65 PCs, 188 TPs, 944 GOs, and 

330 TOs (in the United States), which will be affected by this final rule. Because some 

entities serve in more than one role, these figures involve some double counting.
Docket Nos. RM18-8-000 and RM15-11-003 - 51 -

the following number of employees:

• for planning coordinators, transmission planners, and transmission owners 

(NAICS code 221121, Electric Bulk Power Transmission and Control), a 

maximum of 500 employees

• for generator owners, a maximum of 750 employees.90

As estimated in the NOPR, the total cost to all entities (large and small) is 

$629,585 annually (or an average of $1,345.27 for each of the estimated 468 entities 

affected annually). For the estimated 280 generator owners and transmission owners 

affected annually, the average cost would be $409.70 per year. For the estimated 188 

planning coordinators and transmission planners, the estimated average annual cost 

would be $2,738.84. The estimated annual cost to each affected entity varies from 

$409.70 to $2,738.84 and is not considered significant. The Commission did not receive 

any comments regarding these burden and cost estimates. 

Accordingly, the Commission certifies that this final rule will not have a 

significant economic impact on a substantial number of small entities.

VI. Document Availability

In addition to publishing the full text of this document in the Federal Register, the 

Commission provides all interested persons an opportunity to view and/or print the 

 90 The maximum number of employees for a generator owner (and its affiliates) to 

be “small” varies from 250 to 750 employees, depending on the type of generation (e.g., 

hydroelectric, nuclear, fossil fuel, wind). For this analysis, we use the most conservative 

threshold of 750 employees.
Docket Nos. RM18-8-000 and RM15-11-003 - 52 -

contents of this document via the Internet through FERC's Home Page 

(http://www.ferc.gov) and in FERC's Public Reference Room during normal business 

hours (8:30 a.m. to 5:00 p.m. Eastern time) at 888 First Street, NE, Room 2A, 

Washington DC 20426.

From FERC's Home Page on the Internet, this information is available on 

eLibrary. The full text of this document is available on eLibrary in PDF and Microsoft 

Word format for viewing, printing, and/or downloading. To access this document in 

eLibrary, type the docket number excluding the last three digits of this document in the 

docket number field.

User assistance is available for eLibrary and the FERC’s website during normal 

business hours from FERC Online Support at (202) 502-6652 (toll free at 1-866-208-

3676) or email at ferconlinesupport@ferc.gov, or the Public Reference Room at 

(202) 502-8371, TTY (202)502-8659. E-mail the Public Reference Room at 

public.referenceroom@ferc.gov.

VII. Effective Date and Congressional Notification

These regulations are effective [INSERT DATE 60 days after publication in the 

FEDERAL REGISTER]. The Commission has determined, with the concurrence of 

the Administrator of the Office of Information and Regulatory Affairs of OMB, that this 

rule is not a “major rule” as defined in section 351 of the Small Business Regulatory
Docket Nos. RM18-8-000 and RM15-11-003 - 53 -

Enforcement Fairness Act of 1996. The rule will be provided to the Senate, House, 

Government Accountability Office, and the SBA.

By the Commission. Commissioner McIntyre is not voting on this order.

( S E A L )

Nathaniel J. Davis, Sr.,

Deputy Secretary.
Docket Nos. RM18-8-000 and RM15-11-003 - 54 -

APPENDIX

List of Commenters

Abbreviation Commenter

Bardin David Bardin

BPA Bonneville Power Administration

Idaho Power Idaho Power Company

ISO NE ISO New England Inc.

NERC North American Electric Reliability Corporation

Reclamation Bureau of Reclamation

Resilient Societies Foundation for Resilient Societies

Trade Associations American Public Power Association, Edison Electric 

Institute, Electricity Consumers Resource Council, 

Large Public Power Council, National Rural Electric 

Cooperative Association

TVA Tennessee Valley Authority