Operations Numbers

2014 Owned and Purchased Generation (in MWh)
Owned Purchased Total
Upper Midwest 33,633,367 12,511,710 46,145,077
Colorado 23,019,974 11,449,231 34,469,205
Texas/New Mexico 16,953,436 9,979,851 26,933,287
Total 73,606,777 33,940,792 107,547,569
2014 Energy Supply Resource Mix (owned and purchased) click for larger image
Xcel Energy - 34% Carbon-Free Electricity
Colorado - 32% Carbon-Free Electricity
Texas/New Mexico - 15% Carbon-Free Electricity
Upper Midwest - 54% Carbon-Free Electricity

1 Includes wind energy de-bundled from renewable energy credits (RECs); learn more about RECs
2 Includes wind energy purchased for Windsource®
3 Includes solar energy generated by customer-owned systems through Solar*Rewards®
4 “Other” includes small amounts of power purchased from a number of sources

2020 Projected Energy Supply Resource Mix (based on current resource plans and energy forecasts) click for larger image
Colorado - 28% Carbon-Free Electricity
Xcel Energy - 40% Carbon-Free Electricity
Texas/New Mexico - 22% Carbon-Free Electricity
Upper Midwest - 60% Carbon-Free Electricity
Owned Generating Plants
Type Plants Units Net Dependable Capacity in Megawatts (MW)
Coal 12 25 7,409
Colorado 6 11 2,673
Upper Midwest 4 9 2,651
Texas/New Mexico 2 5 2,085
Natural Gas 25 70 6,877
Colorado 7 18 2,045
Upper Midwest 10 31 2,472
Texas/New Mexico 8 21 2,360
Nuclear 2 3 1,594
Upper Midwest 2 3 1,594
Hydro 26 79 377
Colorado 6 11 236
Upper Midwest 20 68 141
Wind1 3 238 327
Colorado 1 37 25
Upper Midwest 2 201 302
Solar 4 4 0.1
Texas/New Mexico 4 <4 0.08
Other 4 19 435
Upper Midwest 4 19 435
Total 76 438 17,019
Colorado 20 77 4,979
Upper Midwest 42 331 7,595
Texas/New Mexico 14 26 4,445
1 Wind generation is based on net maximum capacity.

Additional Resources

Learn more about Xcel Energy’s power plants.

Read about our nuclear plant operations on our website and in the Form 10-K.

2014 Natural Gas Pipelines (measured in miles)
Transmission Distribution
NSPM 136 9,931
NSPW -- 2,316
PSCo 2,258 21,844
SPS -- --
WestGas Interstate (WGI)1 11 --
1 WGI is an interstate natural gas pipeline company that is part of our continuing regulated utility operations.

Throughout our service territory we operate 289,989 conductor miles of transmission and distribution lines.

2014 Electric Transmission and Distribution Lines
Transmission Lines Distribution Lines Transmission and Distribution Lines by Voltage
500 kV 345 kV 230 kV 161 kV 138 kV 115 kV <115 kV
NSPM 27,584 77,547 2,917 8,403 1,803 416 - 7,502 84,090
NSPW 9,936 26,945 - 1,152 - 1,575 - 1,746 32,408
PSCo 21,176 73,707 - 2,630 12,162 - 92 4,889 75,110
SPS 34,404 18,690 - 8,110 9,312 - - 12,378 23,294
Total 93,100 196,889 2,917 20,295 23,277 1,991 92 26,515 214,902

(Provided in conductor miles— a measure of the conductor in use on our system in miles; it accounts for all conductor phases or strands on a circuit)

2014 System Average Interruption Duration Index (SAIDI)

The System Average Interruption Duration Index (SAIDI) measures the average number of minutes a typical customer was without power in a year.

Xcel Energy
88
NSPM
86
NSPW
121
PSCo
85
SPS
80

2014 System Average Interruption Frequency Index

The System Average Interruption Frequency Index (SAIFI) measures the average number of power outages that an average customer experienced in a year.

Xcel Energy
0.92
NSPM
0.85
NSPW
0.96
PSCo
0.99
SPS
0.86

2014 Customer Average Interruption Duration Index

The Customer Average Interruption Duration Index (CAIDI) measures the length of the average power outage in a year.

Xcel Energy
95.55
NSPM
101.43
NSPW
125.35
PSCo
85.32
SPS
93.00

Providing Community Value