Operations Indicators

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93% of total assets are associated
with energy delivery and 99%
are regulated.

The sustainability indicators listed on this page are dated as of December 31, 2020 except as otherwise noted. Please use this document for comparative purposes as historical data has been updated in some instances.

2020 2019 2018 2017 2016¹
Financial Indicators
Assets
Total Value of Assets ($B) 55.5 53.4 53.1 47.8 47.9
Percentage of Total Assets that are regulated utility assets 99% 99% 97% 97% 97%
Percentage of Total Assets associated with Energy Delivery 93% 93% 93% 92% 91%
Percentage of Total Assets associated with Electricity Generation 7% 7% 7% 8% 9%
- Percentage of fossil-fuel generation 5% 5% 5% * *
- Percentage of renewable generation 2% 2% 2% * *
Capital Expenditures ($B)
Resiliency, Hardening and Modernization Capital 2.2 1.9 * * *
Cleaner Energy² Capital 0.8 0.6 * * *
Customer Growth Capital 0.6 0.6 * * *
IT & Cybersecurity Capital 0.3 0.3 * * *
Other Capital 0.3 0.4 * * *
Total Annual Capital Expenditures ($B) 4.2 3.8 3.2 3.0 2.1
Percentage of Capital Expenditures Related to Coal-Fired Electricity Generation 1.2% 1.1% * * *
Percentage of Capital Expenditures Related to Natural Gas-Fired Electricity Generation (New) 2.2% * * * *
Percentage of Capital Expenditures Related to Renewable Generation (New) 14.7% * * * *
Percentage of Capital Expenditures Related to the Transmission, Storage and Distribution of Natural Gas 12.5% 11.8% * * *
Other Financial Indicators
Rate Base
Percentage of Rate Base Related to Coal-Fired Electricity Generation 3.7% 4.7% * * *
Percentage of Rate Base Related to Natural Gas-Fired Electricity Generation (New) 3.0% * * * *
Percentage of Rate Base Related to Renewable Generation (New) 1.9% * * * *
Percentage of Rate Base Related to the Transmission, Storage and Distribution of Natural Gas (New) 18.9% * * * *
Revenue
Percentage of Revenue Related to Coal-Fired Electricity Generation 5.1% 5.7% * * *
Percentage of Revenue Related to Natural Gas-Fired Electricity Generation (New) 7.7% * * * *
Percentage of Revenue Related to Renewable Generation (New) 1.7% * * * *
Percentage of Revenue Related to the Transmission, Storage and Distribution of Natural Gas (New) 19.6% * * * *
Percentage of Natural Gas Revenue protected by a Decoupled and/or a Lost Revenue Adjustment Mechanism (New) 90% * * * *
Percentage of Electricity Revenue protected by a Decoupled and/or a Lost Revenue Adjustment Mechanism3 (New) 55% * * * *
Customer Information
Number of electricity customers (in thousands) 2,054 2,036 2,022 2,002 1,986
- Percentage of Residential Customers 86.7% 86.5% * * *
- Percentage of Commercial Customers 11.5% 12.4% * * *
- Percentage of Industrial Customers 1% 1.1% * * *
- Percentage of Other Customers4 (New) 0.8% * * * *
Electric Customer Satisfaction Score Range5 (New) 77% - 98% 74% - 98% * * *
Number of natural gas customers (in thousands) 1,291 1,281 1,268 1,244 1,227
- Percentage of Residential Customers 90.5% 90.4% * * *
- Percentage of Commercial Customers 9.3% 9.4% * * *
- Percentage of Industrial Customers 0.1% 0.2% * * *
- Percentage of Other Customers4 (New) 0.1% * * * *
Natural Gas Customer Satisfaction Score Range6 (New) 87% - 93% 87% - 93% * * *
Total Customers (in thousands) 3,345 3,317 3,290 3,246 3,213
Electricity Transmission and Distribution ("T&D")
Total Kilometres of Electricity T&D Lines 185,700 184,850 182,700 * *
- Percentage of Distribution Lines 81% 81% 81% * *
- Percentage of Transmission Lines 19% 19% 19% * *
Natural Gas T&D
Total Kilometres of Natural Gas T&D lines 57,000 56,850 56,850 * *
- Percentage of Distribution Lines 94% 94% 94% * *
- Percentage of Transmission Lines 6% 6% 6% * *
Electricity Generation
Electricity Generation Capacity (in MW)
Coal 1,073 1,242 1,242 1,412 1,412
Oil 61 71 76 76 81
Diesel 380 375 374 375 375
Natural Gas 2,135 2,201 2,107 1,555 1,555
Hydropower 395 566 566 563 563
Solar 57 57 55 55 45
Total Electricity Generation Capacity (in MW) 4,101 4,512 4,420 4,036 4,031
Notes: (New) in the table above identifies new key performance indicators added this year.
The asterisks (“*“) in the table above indicate metrics added in recent years and historical data is not available.
(1)
Data is provided from the date of acquisition of the following: Aitken Creek Gas Storage Facility (April 2016) and ITC (October 2016).
(2)
Cleaner energy capital is defined as investments that reduce air emissions, water usage and/or increase customer energy efficiency.
(3)
Includes revenue from short-term wholesale revenue at UNS Energy, which is protected by regulatory deferral mechanisms and therefore does not impact earnings.
(4)
Includes wholesale customers.
(5)
Excludes TEP’s J.D. Power customer satisfaction score of 751 in 2020 and 731 in 2019.
(6)
Excludes UNS Gas’ J.D. Power customer satisfaction score of 729 in 2020 and 740 in 2019.
(7)
UNS Energy had a landfill gas contract that expired in 2019.
(8)
Mixed source purchases from the grid allocated based on estimated supplier energy mix and/or regional energy supply.
(9)
Clean energy includes nuclear and renewable energy sources.
(10)
An incident is deemed reportable if it meets the reporting requirements specified by a regulator.
(11)
Notification, from a regulator, that a pipeline operator is in probable violation of pipeline safety statutes or regulations.
(12)
Includes bare and/or uncoated iron.
(13)
Pipeline in service that is bare/uncoated steel.