ER27-432-001 · 2026-11-10 · Southwest Power Pool, Inc.

SPP corrects the Upper Missouri rate sheet for conditional large-load service

November 10, 2026 
VIA ELECTRONIC FILING 
 
The Honorable Debbie-Anne A. Reese 
Secretary 
Federal Energy Regulatory Commission 
888 First Street, N.E. 
Washington, D.C. 20426 
Re: 
Southwest Power Pool, Inc., Docket No. ER27-432-___ 
Amendment to Tariff Filing 
Dear Secretary Reese: 
Pursuant to Sections 35.17 and 385.215 of the Federal Energy Regulatory 
Commission’s (“Commission”) Rules and Regulations, 18 C.F.R. §§ 35.17 and 
385.215, Southwest Power Pool, Inc. (“SPP”) submits this amendment to the proposed 
revisions to the SPP Open Access Transmission Tariff (“Tariff”)1 submitted by SPP in 
Docket No. ER27-432-000 on November 6, 2026 (“November 6 Filing”).2 Pursuant to 
the Commission’s regulations, a public utility may file to amend a tariff that has not 
become effective and upon which no Commission or delegated order has yet been 
issued.3 Amendment of the November 6 Filing is permitted because no Commission or 
delegated order has been issued in the docket. SPP respectfully requests the 
Commission issue an order accepting the November 6 Filing as amended herein, with 
the originally requested effective date of February 1, 2027.
 
1  
Southwest Power Pool, Inc., Open Access Transmission Tariff, Sixth Revised Volume 
No. 1. References in this filing to “Tariff” refer to the version of SPP’s Tariff currently 
in effect.  “Proposed Tariff” refers to a version reflecting the revisions proposed in this 
proceeding. 
2  
Submission of Tariff Revisions to Revise Schedule 15 and Attachment T for the SPP 
West Region of Southwest Power Pool, Inc., Docket No. ER27-432-000 (November 6, 
2026). 
3  
18 C.F.R. § 35.17(b).

The Honorable Debbie-Anne A. Reese 
November 10, 2026 
Page 2 
 
I. 
BACKGROUND 
 
SPP submitted the November 6 Filing to add provisions for Conditional High 
Impact Large Load Service (“CHILLS”) for pricing Zones in the SPP West Region, 
and to make other clarifying edits.  
 
II. 
DESCRIPTION OF AMENDED FILING 
 
In the November 6 Filing, SPP proposed revisions to rate sheets for Point-To-
Point Transmission Service in the SPP West Region. SPP inadvertently omitted 
revisions to the rate sheet for the Upper Missouri Zone to add references to Schedule 
14 and Incremental Market Efficiency Use revenues. SPP proposes the following 
revisions: 
 
Point-To-Point Transmission Service and Conditional High Impact Large 
Load Service Revenue Crediting for Point-To-Point Rates 
Rates for Point-To-Point Transmission Service under this Attachment T shall 
reflect any adjustments for Schedules 7, and 8 revenues, 14, Schedule and 15 
revenues, Incremental Market Efficiency Use revenues, and revenues 
distributed and allocated under Attachment AU, implemented in accordance 
with Section 34.1(2) of this Tariff. The rates, including any applicable 
adjustments for Schedules 7, and 8, 14 revenues, andSchedule 15 revenues, 
Incremental Market Efficiency Use revenues, and revenues distributed and 
allocated under Attachment AU, shall be set forth in the RRR File.4 
 
In SPP’s filing to expand its Regional Transmission Organization,5 SPP added 
Zone 19 West to include the geographic area of the Upper Missouri Zone located in the 
Western Interconnection. The rate sheet for the Upper Missouri Zone is applicable to 
entities located in the Upper Missouri Zone East (“Zone 19 East”) and the Upper 
Missouri Zone West (“Zone 19 West”). 
 
 First, SPP adds a reference to Schedule 14 for the DC Tie Access Charge. The 
DC Tie Access Charge is defined as “[a] charge on a transmission reservation utilizing 
a West DC Tie that sinks outside of the Zone where the West DC Tie is located.”6 The 
Transmission Customer is responsible for the DC Tie Access Charge determined in 
 
4  
Proposed Tariff, Attachment T Upper Missouri Zone. 
5  
Southwest Power Pool, Inc., Submission of Revisions to Tariff, Bylaws, and 
Membership Agreement to Expand the Regional Transmission Organization into the 
Western Interconnection (Part 1 of 2), Docket No. ER24-2184-000 and (Part 2 of 2), 
Docket No. ER24-2185-000 (June 4, 2024). 
6  
Tariff, Part I, Section 1 – Definitions D.

The Honorable Debbie-Anne A. Reese 
November 10, 2026 
Page 3 
 
Schedule 14 of the Tariff. SPP adds this reference to the Upper Missouri Zone rate 
sheet because the DC Tie Access Charge is applicable in this Zone. 
 
Second, SPP adds a reference to Incremental Market Efficiency Use revenues. 
The Incremental Market Efficiency Use Charge is “[a] market recovery mechanism to 
compensate West DC Tie Transmission Owners for the expected loss of life of certain 
West DC Tie facilities due to increased utilization of the West DC Ties by the 
Integrated Marketplace.”7 SPP adds this reference to the Upper Missouri Zone rate 
sheet because Incremental Market Efficiency Use revenues are applicable in this Zone. 
 
SPP is not including revisions, as proposed in the November 6 Filing to other 
rate sheets, to remove the references to Attachment AU revenues from this rate sheet 
because the Upper Missouri Zone includes utilities in the SPP East Region. 
 
III. 
ADDITIONAL INFORMATION 
 
A. 
Information Provided Per Commission Regulations8 
 
1. 
Documents submitted with this filing: 
In addition to this Transmittal Letter, Clean and Redlined Tariff 
revisions under the Sixth Revised Volume No. 1. 
2. 
Service: 
SPP has electronically served a copy of this filing on all its 
Members, Transmission Customers, and Market Participants. A 
complete copy of this filing will be posted on the SPP web site, 
www.spp.org, and is also being served on all affected state 
commissions. 
3. 
Requisite agreements: 
Not Applicable. 
B. 
Communications 
Correspondence and communications regarding this filing should be 
sent to, and SPP requests that the Secretary include on the official 
service list, the following: 
Justin A. Hinton 
Senior Attorney 
Tessie Kentner 
Director & Associate General Counsel 
 
7  
Tariff, Part I, Section 1 – Definitions I. 
8  
Because the revisions to the Tariff submitted herein do not involve any changes in 
rates, the use of the abbreviated filing procedures set forth in 18 C.F.R. § 
35.13(a)(2)(iii) is appropriate.

The Honorable Debbie-Anne A. Reese 
November 10, 2026 
Page 4 
 
Southwest Power Pool, Inc. 
201 Worthen Drive 
Little Rock, AR 72223 
Telephone: (501) 482-2468 
jhinton@spp.org  
 
Southwest Power Pool, Inc. 
201 Worthen Drive 
Little Rock, AR 72223 
Telephone: (501) 688-1782 
tkentner@spp.org  
IV. 
CONCLUSION 
 
SPP is not requesting any other amendments or modifications to the November 
6 Filing. As stated previously, amendment of the November 6 Filing in this proceeding 
is permitted because no Commission or delegated order has been issued on the 
November 6 Filing, For the reasons stated herein, SPP respectfully requests that the 
Commission issue an order accepting the November 6 Filing, as amended herein, as 
just and reasonable, with an effective date of February 1, 2027. 
 
Respectfully submitted, 
 
/s/ Justin A. Hinton 
Justin A. Hinton 
Southwest Power Pool, Inc. 
201 Worthen Drive 
Little Rock, AR  72223-4936 
  
Attorney for  
Southwest Power Pool, Inc.

CERTIFICATE OF SERVICE 
I hereby certify that I have this day served the foregoing document upon each 
person designated on the official service list compiled by the Secretary in this proceeding. 
 
Dated at Little Rock, AR, this 10th day of November, 2026.  
 
 
 
 
 
 
/s/ Michelle Harris 
 
 
 
 
 
 
Michelle Harris 
 
 
 
 
 
 
Southwest Power Pool, Inc. 
 
 
 
 
 
 
201 Worthen Drive 
 
 
 
 
 
 
Little Rock, AR 72223-4936 
 
 
 
 
 
 
(501) 614-3200