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Rate Matters (Tables)
 3 Months Ended
Mar. 31, 2018
Public Utilities, General Disclosures [Abstract]  
Colorado 2017 Multi-Year Electric Rate Case
Revenue Request (Millions of Dollars)
 
2018
 
2019
 
2020
 
2021
 
Total
Revenue request
 
$
74

 
$
75

 
$
60

 
$
36

 
$
245

Clean Air Clean Jobs Act (CACJA) rider conversion to base rates
 
90

 
—

 
—

 
—

 
90

Transmission Cost Adjustment (TCA) rider conversion to base rates
 
43

 
—

 
—

 
—

 
43

  Total
 
$
207

 
$
75

 
$
60

 
$
36

 
$
378

 
 
 
 
 
 
 
 
 
 
 
Expected year-end rate base (billions of dollars)
 
$
6.8

 
$
7.1

 
$
7.3

 
$
7.4

 
 
Colorado 2017 Multi-Year Gas Rate Case
The request, detailed below, is based on FTYs, a 10.0 percent ROE and an equity ratio of 55.25 percent.
Revenue Request (Millions of Dollars)
 
2018
 
2019
 
2020
 
Total
Revenue request
 
$
63

 
$
33

 
$
43

 
$
139

Pipeline System Integrity Adjustment (PSIA) rider conversion to base rates (a)
 
—

 
94

 
—

 
94

Total
 
$
63

 
$
127

 
$
43

 
$
233

 
 
 
 
 
 
 
 
 
Expected year-end rate base (billions of dollars) (b)
 
$
1.5

 
$
2.3

 
$
2.4

 


 
(a)  
The roll-in of PSIA rider revenue into base rates will not have an impact on customer bills or revenue as these costs are already being recovered through the rider. The recovery of incremental PSIA related investments in 2019 and 2020 are included in the base rate request.

(b)  
The additional rate base in 2019 predominantly reflects the roll-in of capital associated with the PSIA rider.
Texas 2017 Rate Case
The following table summarizes SPS’ rate increase request:
Revenue Request (Millions of Dollars)
 
 
Incremental revenue request
 
$
69

Transmission Cost Recovery Factor (TCRF) rider conversion to base rates (a)
 
(14
)
  Net revenue increase request
 
$
55


(a) 
The roll-in of the TCRF rider revenue into base rates will not have an impact on customer bills or revenue as these costs are already being recovered through the rider. SPS can request another TCRF rider after the conclusion of this rate case to recover transmission investments subsequent to June 30, 2017.
New Mexico 2017 Electric Rate Case
The following table summarizes certain parties’ recommendations from SPS’ request:
Millions of Dollars
 
 NMPRC Staff Testimony
 
NMAG Testimony
SPS request
 
$
43

 
$
43

Reduction to request for the impact of the TCJA
 
(11
)
 
(11
)
SPS request, including the impact of the TCJA
 
32

 
32

 
 
 
 
 
ROE (9.0 percent and 9.21 percent, respectively)
 
(4
)
 
(6
)
Capital structure (52.0 percent and 53.97 percent, respectively)
 
(7
)
 
(3
)
Accelerated depreciation (Tolk plant)
 
(3
)
 
(3
)
Disallow rate case expenses
 
(2
)
 
(3
)
Regional transmission revenue (adjustment for the impact of the TCJA)
 
—

—

(3
)
Post test year plant (estimated numbers were updated to actual)
 
(1
)
 
(2
)
Other, net
 
(4
)
 
(5
)
Recommended rate increase
 
$
11

 
$
7