Circuit Reliability Review
San Dimas
2021
2
• Southern California Edison (SCE) is an Edison International company
• One of the nation’s largest electric utilities
• More than 130 years of history
• Headquartered in Rosemead, California
• Regulated by the California Public Utilities Commission (CPUC) and the Federal Energy Regulatory Commission (FERC)
• 50,000 square miles of SCE service area across Central, Coastal, and Southern California
• 15 million residents through 5 million customer accounts
• 445 communities and 13 Native American tribes
Who We Are
Our Grid
To deliver safe, reliable, and affordable power,
we monitor and maintain a vast electricity system
730,000 Transformers
119,000 Miles of Transmission and Distribution Lines
4,600 Circuits
1.4 Million Poles
50,000 Square Miles
3
Strengthening and Modernizing the Grid
• Infrastructure reliability – updating
underground cables, poles, switches, and
transformers
• Wildfire mitigation – hardening infrastructure,
bolstering situational awareness capabilities,
and enhancing operational practices
• Transmission – connecting renewables,
installing new substations, and updating lines
• Grid readiness – updating the grid for impacts
from new technologies
• Long-term energy policy – supporting energy
storage, electric vehicles, and renewables
SCE plans to spend more than $5B each
year to maintain, improve, and harden
its infrastructure
SCE’s investments support safe, reliable, affordable, and clean energy for our customers
2020 Capital Investments
235 miles of
underground cable replaced
97 miles of overhead conductor
replaced for public safety
11.1k distribution poles replaced
3.6k transmission poles replaced
79 underground structure
replacements
4
Protecting Public Safety: Wildfire Mitigation Activities
2020 Year-End Progress Report – Data as of 12/31/20 5
Protecting Public Safety: Public Safety Power Shutoffs
6
• To reduce the threat of wildfires, SCE
implements Public Safety Power Shutoffs
(PSPS) to temporarily shut off power to some
customers in areas with a high risk for wildfires
to prevent the electric system from
becoming the source of ignition
• PSPS is used as a measure of last resort to
protect public safety under dangerous fire
weather conditions, including high winds,
low humidity, and dry vegetation
• Multiple methods are used to notify people in
affected areas before, during and after a PSPS
event
• SCE provides resources to support customers
during PSPS and offers several programs and
rebates to help customers be prepared and
more resilient during emergencies
• SCE is working to reduce the impact of PSPS
and is continuing to strengthen the electric
grid to become more resilient in the face of
extreme weather events
Pathway 2045: Key steps California must take to reach carbon neutrality
Creating a Clean Energy Future
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100% of grid sales with
carbon-free electricity
80 GW of utility-scale
clean generation
30 GW of utility-scale
energy storage
70% of all buildings will
use efficient electric
space and water heating
90% fewer GHG
emissions from all-
electric homes
26 million electric
vehicles
Over 1 million
electrified medium
and heavy duty
vehicles
50% reduction in natural
gas consumption
40% of the remaining
natural gas is
biomethane and
hydrogen
Reliability Overview
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What is Reliability?
• In simplest terms:
Having dependable electricity when you need it.
• Outages:
• Maintenance outages (aka planned outages)
• Repair outages (aka unplanned outages)
• Sustained Outage = An outage lasting > 5 minutes
• Momentary Outage = An outage lasting ≤ 5 minutes
• Public Safety Power Shutoff (PSPS)
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Major Event Day (MED) : A day in which the daily system SAIDI exceeds a threshold value. For the purposes of calculating daily system SAIDI, any interruption that spans multiple calendar days is accrued to the day on which the interruption began. Statistically, days having a daily system SAIDI greater than a threshold value are days on which the energy delivery system experienced stresses beyond that normally expected (such as severe weather).
Public Safety Power Shutoff (PSPS) : An operational protocol that SCE implements under extreme weather conditions in order to minimize the threat of wildfires and keep communities safe from potentially dangerous situations. These types of sustained outages are temporary and usually involve situations where high fire areas are experiencing adverse weather or public safety is at risk.
How Do We Measure Reliability?
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11Overview of San DimasThere are 22 circuits that serve San Dimas 1Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers
APPLE(12KV) 1,604 - - -
AVENIDA(12KV) 1,331 - - -
BANANA(12KV) 1,163 - - -
BONITA(12KV) 1,310 - - -
BRYDON(12KV) 1,446 - - -
CAL POLY(12KV) 942 - - -
CALORA(12KV) 797 - - -
CARLET(12KV) 1,685 - - -
CATARACT(12KV) 1,275 - - -
CEYLON(12KV) 1,717 - - -
CREVOLIN(12KV) 1,339 - - -
EGMONT(12KV) 810 - - -
FOOTHILL(12KV) 1,625 - - -
GLADSTONE(12KV) 762 - - -
KRANZER(12KV) 1,358 - - -
KUMQUAT(12KV) 2,090 - - -
MAYBELL(12KV) 1,589 - - -
MICHELLE(12KV) 1,056 - - -
NUBIA(12KV) 1,357 - - -
REEDER(12KV) 1,489 - - -
RHOADS(12KV) 2,411 - - -
VIAVERDE(12KV) 1,575 - - -
- - - -
- - - -
- - - -
- - - -
- - - -
- - - -
- - - -
- - - -
Grand Total 30,731
Note: The number of customers listed represents the total number of customers on each circuit (not the local jurisdiction).
11
BarChart
SCE SYSTEMWIDE
**Data is as of 03/16/2021, data
can be slightly different due to
outage data validation process
San Dimas
Reliability History of Circuits Serving San Dimas (No Exclusions)
**“Exclusions” are days which
utilities are allowed to remove
from their metrics because
the outages on those days
were caused by acts of
nature.
140.6
76.4
63.8
131.3139.7 136.8
178.0
201.3
0.0
50.0
100.0
150.0
200.0
250.0
2017 2018 2019 2020
SAIDI
(average
minutes of
sustained
interruptions)
1.3
1.0
0.7
1.41.2
0.91.0
1.1
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
SAIFI
(average
frequency of
sustained
interruptions)
2.6
2.0
0.9
1.4
1.8
1.41.4 1.4
0.0
0.5
1.0
1.5
2.0
2.5
3.0
MAIFI
(average
frequency of
momentary
interruptions)
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SAIDIChart
SAIDI = the cumulative amount of time the average customer is interrupted by “sustained” outages each year.
Causes of Repair Outages in San Dimas
2020
PSPS
9.8%
Equipment Failure
48.5%
Operation
15.9%
3rd Party
1.1%
Vegetation /Animal
7.2%
Weather /Fire
/Earthquake
8.3%
Other
9.3%
Contributions to
SAIDI by Outage Cause▪ Equipment Failure e.g., in-service failure of transformer, switch, or conductors▪Vegetation/Animale.g., tree branch, rodent, or bird causing a short circuit betweenconductors▪ Other e.g., patrolled but no cause found▪ Operations e.g., urgent maintenance w/o 3-daynotice▪ 3rd Party e.g., balloon, car hit pole, dig-in
▪ PSPS e.g., Public
Safety Power Shutoff
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SAIFIChart
SAIFI = the number of times the average customer is interrupted by “sustained” outages each year
Causes of Repair Outages in San Dimas
2020
3rd Party
2.6%
Equipment Failure
39.9%
Operation
26.6%
Other
13.5%
Vegetation /Animal
5.8%
Weather /Fire
/Earthquake
10.7%
PSPS
0.9%
Contributions to SAIFI by Outage Cause
▪ Equipment Failure e.g., in-service failure of
transformer, switch, or conductors▪Vegetation/Animal
e.g., tree branch, rodent, or birdcausing a short circuit between conductors
▪ Othere.g., patrolled but no cause found
▪ Operationse.g., urgent maintenance w/o 3-daynotice▪ 3rd Party e.g., balloon, car hit pole, dig-in
▪ PSPS
e.g., Public Safety Power Shutoff
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16
Back-up Slides
Reliability Histories of Circuits Serving San Dimas
Updated through Dec 2020
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CitySummary
SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI
140.6 1.3 2.6 76.4 1.0 2.0 63.8 0.7 0.9 16.6 0.1 0.6 18.6 0.2 0.3 31.7 0.4 0.3 64.5 0.6 0.2 131.3 1.4 1.4
3rd Party 17% 15% 12% 4% 1% 18% 12% 12% 18% 8% 31% - 1% 1% - - - 31% - - 19% 1% 3% 11%
Equipment Failure 63% 62% 35% 52% 39% 21% 37% 27% 21% 73% 52% 32% 45% 59% 35% 70% 42% 0% 33% 29% 81% 49% 40% 34%
Operation 5% 8% 2% 11% 10% 12% 23% 24% 10% 11% 12% - 6% 7% 10% 12% 16% 12% 22% 45% - 16% 27% 5%
Other 4% 6% 18% 12% 17% 16% 11% 16% 19% 3% 3% - - - - 12% 31% 53% 12% 8% - 9% 13% 12%
Vegetation/Animal 4% 4% 30% 10% 30% 33% 2% 1% 17% 0% 0% 68% 48% 33% 55% - - 3% 1% 1% - 7% 6% 38%
Weather/Fire/Earthquake 6% 5% 3% 11% 3% - 15% 20% 15% 4% 2% - 0% 0% - 5% 12% - 13% 15% - 8% 11% -
PSPS - - - - - - - - - - - - - - - - - - 20% 2% - 10% 1% -
SCE SYSTEMWIDE 139.7 1.2 1.8 136.8 0.9 1.4 178.0 1.0 1.4 17.1 0.2 0.3 17.2 0.2 0.4 71.4 0.3 0.4 95.5 0.4 0.4 201.3 1.1 1.4
Average Reliability of 22 Circuits Serving San Dimas
4th Qtr 2020 20202017 2018 2019 1st Qtr 2020 2nd Qtr 2020 3rd Qtr 2020
22 Circuits Serving San Dimas -- Total
Customers: 30,731
Notes:
No outages are excluded from the metrics.
Outage Causes: Other: e.g., patrolled but no cause could be foundOperations: e.g., urgent maintenance w/o 3-day notice to customers3rd Party: e.g., balloons, car hit pole, dig-inVegetation/Animal: e.g., tree branch, rodent, or bird causing short circuit across conductorsPSPS: e.g., Public Safety Power Shutoff
SAIDI (minutes) = the cumulative amount of time the average customer is interrupted by “sustained” (longer than 5 minutes) outages.
SAIFI (interruptions) = the number of times the average customer is interrupted by “sustained” outages.
MAIFI (interruptions) = the number of times the average customer is interrupted by “momentary " (lasting 5 minutes or less) outages.
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CircuitHistory1
SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI
APPLE(12KV) - Customers: 1,604 64.9 1.4 0.6 169.4 1.7 1.6 29.2 0.1 2.0 0.5 0.0 - 2.6 0.0 - 48.3 0.1 - - - - 51.4 0.1 -
3rd Party 100% 100% 100% - - - 2% 8% - - - - - - - - - - - - - - - -
Equipment Failure - - - 3% 1% - 9% 7% - - - - 86% 76% - 94% 55% - - - - 93% 54% -
Operation - - - 35% 33% 37% 61% 64% - 100% 100% - - - - 3% 32% - - - - 4% 32% -
Other - - - 25% 60% 63% - - 51% - - - - - - 2% 13% - - - - 2% 9% -
Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - -
Weather/Fire/Earthquake - - - 37% 6% - 28% 21% 49% - - - 14% 24% - - - - - - - 1% 5% -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
AVENIDA(12KV) - Customers: 1,331 164.0 1.2 2.0 54.3 1.5 4.0 82.8 1.1 2.0 1.4 0.0 - 7.7 0.1 - 34.6 0.1 - 79.4 1.2 - 123.1 1.4 -
3rd Party 7% 4% - - - - - - - - - - - - - - - - - - - - - -
Equipment Failure 89% 86% 50% 70% 30% 50% 69% 93% 50% - - - - - - - - - 100% 100% - 64% 83% -
Operation 4% 10% - - - 25% 28% 4% 1% 34% 24% - 91% 90% - 100% 100% - 0% 0% - 34% 16% -
Other - - 50% 0% 0% - 3% 3% - - - - - - - - - - - - - - - -
Vegetation/Animal 1% 0% - 18% 68% 25% - - 50% 66% 76% - 9% 10% - - - - - - - 1% 1% -
Weather/Fire/Earthquake - - - 12% 1% - - - - - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
BANANA(12KV) - Customers: 1,163 49.7 0.2 4.9 3.1 0.0 3.0 15.2 0.3 1.0 49.3 0.1 1.0 - - - 126.5 1.2 1.1 32.2 0.1 1.0 208.0 1.4 3.0
3rd Party 51% 63% 59% - - 33% 0% 0% - - - - - - - - - - - - - - - -
Equipment Failure 17% 5% 21% 7% 14% - 45% 80% - 100% 100% 100% - - - 75% 4% - 56% 70% 100% 78% 18% 64%
Operation 4% 26% - - - - - - 100% - - - - - - 25% 96% 100% 44% 30% - 22% 82% 36%
Other - - - 93% 86% 67% 54% 20% - - - - - - - - - - - - - - - -
Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - -
Weather/Fire/Earthquake 28% 6% 21% - - - - - - - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
BONITA(12KV) - Customers: 1,310 86.4 2.1 1.9 10.2 1.0 4.0 - - - 159.7 1.0 1.8 1.9 0.0 - 102.8 1.0 - 0.1 0.0 - 264.5 2.0 1.8
3rd Party - - - - - 25% - - - - - - - - - - - - - - - - - -
Equipment Failure 100% 100% 46% 13% 1% 25% - - - 100% 100% 100% - - - 38% 2% - 100% 100% - 75% 49% 100%
Operation - - - - - 25% - - - - - - 100% 100% - 0% 1% - - - - 1% 2% -
Other - - 54% - - - - - - - - - - - - 61% 98% - - - - 24% 49% -
Vegetation/Animal - - - 87% 99% 25% - - - - - - - - - - - - - - - - - -
Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
Reliability Histories for Individual Circuits Serving San Dimas - 1 of 6
2017 2018 2019 1st Qtr 2020 2nd Qtr 2020 3rd Qtr 2020 4th Qtr 2020 2020
19
CircuitHistory2
SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI
BRYDON(12KV) - Customers: 1,446 234.3 1.2 1.0 116.3 2.1 3.0 33.4 0.1 1.0 - - - - - - 4.6 0.0 - 25.5 0.0 1.0 30.1 0.1 1.0
3rd Party 82% 87% - - - - - - - - - - - - - - - - - - 100% - - 100%
Equipment Failure 1% 1% - 8% 1% 33% - - - - - - - - - - - - - - - - - -
Operation 16% 7% - 62% 48% 33% - - - - - - - - - 25% 31% - - - - 4% 14% -
Other 0% 0% 3% 8% 1% - - - - - - - - - - 75% 69% - 55% 35% - 58% 51% -
Vegetation/Animal 1% 3% 97% 9% 50% 33% 26% 72% 100% - - - - - - - - - - - - - - -
Weather/Fire/Earthquake 1% 1% - 12% 1% - 74% 28% - - - - - - - - - - 45% 65% - 38% 35% -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
CAL POLY(12KV) - Customers: 942 709.3 3.0 4.0 1.2 0.0 2.0 0.2 0.0 1.0 54.9 1.1 2.1 5.3 0.1 0.7 0.3 0.0 0.4 - - 1.0 60.4 1.3 4.1
3rd Party - - 25% - - - - - - 78% 94% - - - - - - - - - - 71% 85% -
Equipment Failure 54% 33% - - - - - - - 14% 3% 100% 95% 98% 46% - - - - - 100% 21% 12% 83%
Operation 1% 0% - - - - 100% 100% - 7% 2% - 5% 2% - 100% 100% - - - - 7% 3% -
Other - - 50% - - 50% - - 100% - - - - - - - - - - - - - - -
Vegetation/Animal 17% 33% 25% - - 50% - - - - - - - - 54% - - 100% - - - - - 17%
Weather/Fire/Earthquake 28% 33% - 100% 100% - - - - - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
CALORA(12KV) - Customers: 797 1.6 0.0 - 8.9 1.0 4.0 - - - 5.9 0.0 0.8 - - - - - - 15.9 0.0 - 21.8 0.1 0.8
3rd Party - - - - - - - - - - - - - - - - - - - - - - - -
Equipment Failure - - - 3% 0% 25% - - - - - - - - - - - - - - - - - -
Operation 100% 100% - - - 25% - - - 100% 100% - - - - - - - - - - 27% 58% -
Other - - - - - - - - - - - - - - - - - - - - - - - -
Vegetation/Animal - - - 97% 100% 50% - - - - - 100% - - - - - - - - - - - 100%
Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - 100% 100% - 73% 42% -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
CARLET(12KV) - Customers: 1,685 84.7 1.1 2.4 75.9 0.1 2.0 309.9 1.9 0.6 69.6 0.3 1.1 1.1 0.0 - 20.4 0.0 - 84.3 1.1 - 175.3 1.4 1.1
3rd Party 8% 2% - - - 50% - - - - - - 100% 100% - - - - - - - 1% 2% -
Equipment Failure - - - 92% 77% - 71% 82% 86% 53% 33% - - - - 92% 64% - - - - 32% 6% -
Operation 8% 6% - - - - 25% 14% - 33% 47% - - - - 8% 36% - - - - 14% 9% -
Other 33% 24% - 8% 22% - 4% 4% 14% 15% 20% - - - - - - - - - - 6% 4% -
Vegetation/Animal 15% 23% 79% 0% 1% 50% - - - - - 100% - - - - - - - - - - - 100%
Weather/Fire/Earthquake 35% 45% 21% - - - - - - - - - - - - - - - 100% 100% - 48% 79% -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
Reliability Histories for Individual Circuits Serving San Dimas - 2 of 6
2017 2018 2019 1st Qtr 2020 2nd Qtr 2020 3rd Qtr 2020 4th Qtr 2020 2020
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CircuitHistory3
SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI
CATARACT(12KV) - Customers: 1,275 4.6 0.0 2.0 44.2 0.9 3.2 77.3 1.0 - 13.9 0.0 1.1 3.5 0.0 - - - - - - - 17.4 0.1 1.1
3rd Party - - - 68% 5% 31% - - - - - - 65% 80% - - - - - - - 13% 59% -
Equipment Failure 83% 36% - 11% 3% - 40% 16% - 100% 100% - - - - - - - - - - 80% 27% -
Operation 17% 64% - - - - 12% 6% - - - - 35% 20% - - - - - - - 7% 15% -
Other - - - 21% 92% 7% 2% 1% - - - - - - - - - - - - - - - -
Vegetation/Animal - - 100% - - 62% - - - - - 100% - - - - - - - - - - - 100%
Weather/Fire/Earthquake - - - - - - 46% 77% - - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
CEYLON(12KV) - Customers: 1,717 172.5 0.4 3.0 22.2 0.1 1.0 48.7 1.2 1.2 - - - 18.9 0.0 - 9.7 0.1 - 3.9 0.1 - 32.5 0.2 -
3rd Party - - 67% - - - - - - - - - - - - - - - - - - - - -
Equipment Failure 90% 58% - - - 100% 52% 7% 100% - - - 100% 100% - 94% 90% - - - - 86% 61% -
Operation 6% 30% - - - - 48% 93% - - - - - - - 6% 10% - - - - 2% 5% -
Other - - - 40% 28% - - - - - - - - - - - - - - - - - - -
Vegetation/Animal 4% 12% 33% 60% 72% - - - - - - - - - - - - - 100% 100% - 12% 33% -
Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
CREVOLIN(12KV) - Customers: 1,339 31.5 0.2 - - - - 13.8 0.1 - 3.3 0.0 - - - - 19.6 0.6 0.4 58.0 1.0 - 80.9 1.6 0.4
3rd Party - - - - - - - - - - - - - - - - - - - - - - - -
Equipment Failure 100% 100% - - - - 100% 100% - 81% 38% - - - - 71% 1% - 12% 2% - 29% 2% -
Operation - - - - - - - - - 19% 62% - - - - - - - 88% 98% - 64% 62% -
Other - - - - - - - - - - - - - - - 29% 99% 100% - - - 7% 36% 100%
Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - -
Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
EGMONT(12KV) - Customers: 810 127.6 1.7 2.4 132.2 1.0 - 158.6 0.8 0.3 - - - 50.0 0.9 1.3 68.9 1.2 1.0 121.6 2.0 - 240.5 4.2 2.4
3rd Party - - - - - - - - - - - - - - - - - - - - - - - -
Equipment Failure 82% 88% 59% 0% 0% - 0% 0% - - - - 98% 96% 21% 92% 97% - - - - 47% 49% 12%
Operation 12% 7% - - - - 3% 9% - - - - 2% 4% - 8% 3% - 42% 49% - 24% 26% -
Other - - - - - - 97% 90% 100% - - - - - - - - 100% - - - - - 44%
Vegetation/Animal 5% 5% 41% - - - - - - - - - - - 79% - - - - - - - - 44%
Weather/Fire/Earthquake - - - 100% 100% - - - - - - - - - - - - - 58% 51% - 29% 25% -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
Reliability Histories for Individual Circuits Serving San Dimas - 3 of 6
2017 2018 2019 1st Qtr 2020 2nd Qtr 2020 3rd Qtr 2020 4th Qtr 2020 2020
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CircuitHistory4
SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI
FOOTHILL(12KV) - Customers: 1,625 31.7 0.1 1.0 25.1 0.0 2.0 8.2 0.1 3.0 - - 1.0 - - 1.0 1.3 0.0 - 255.7 0.3 - 257.0 0.3 2.0
3rd Party - - - - - 44% 92% 62% - - - - - - - - - - - - - - - -
Equipment Failure 72% 47% - 100% 100% - 8% 38% 33% - - - - - - - - - 3% 7% - 3% 7% -
Operation 28% 53% - - - - - - 33% - - - - - - 100% 100% - 2% 15% - 2% 16% -
Other - - - - - - - - - - - - - - - - - - - - - - - -
Vegetation/Animal - - 100% - - 56% - - 33% - - 100% - - 100% - - - - - - - - 100%
Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - 95% 78% - 95% 77% -
GLADSTONE(12KV) - Customers: 762 10.2 0.1 3.0 5.8 0.0 2.0 17.1 0.0 - - - 1.0 - - - - - 0.0 - - - - - 1.1
3rd Party - - - - - 50% - - - - - - - - - - - - - - - - - -
Equipment Failure - - - - - - 94% 79% - - - - - - - - - - - - - - - -
Operation - - - - - - 6% 21% - - - - - - - - - 100% - - - - - 1%
Other 100% 100% 67% 60% 67% - - - - - - - - - - - - - - - - - - -
Vegetation/Animal - - 33% - - 50% - - - - - 100% - - - - - - - - - - - 99%
Weather/Fire/Earthquake - - - 40% 33% - - - - - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
KRANZER(12KV) - Customers: 1,358 194.5 1.0 1.0 6.2 0.0 2.0 0.9 0.0 - 9.7 0.0 1.0 - - - - - 1.0 - - - 9.7 0.0 2.1
3rd Party 100% 100% - - - 50% - - - - - - - - - - - 100% - - - - - 50%
Equipment Failure - - - 100% 100% - 34% 81% - 100% 100% - - - - - - - - - - 100% 100% -
Operation - - - - - - - - - - - - - - - - - - - - - - - -
Other - - - - - - 66% 19% - - - - - - - - - - - - - - - -
Vegetation/Animal - - 100% - - 50% - - - - - 100% - - - - - - - - - - - 50%
Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
KUMQUAT(12KV) - Customers: 2,090 228.4 4.0 5.6 91.2 1.0 0.1 12.3 0.1 1.0 0.1 0.0 - 130.2 1.1 1.1 27.2 1.0 - 214.0 1.1 0.9 371.4 3.2 2.0
3rd Party 1% 3% 16% - - - - - - - - - - - - - - - - - - - - -
Equipment Failure 90% 75% 53% 100% 100% 100% 59% 54% - - - - - - - 98% 100% - 98% 95% 100% 64% 65% 47%
Operation 9% 23% 13% - - - 24% 26% - 100% 100% - 0% 1% - 2% 0% - - - - 0% 0% -
Other - - - - - - 17% 20% 100% - - - - - - - - - - - - - - -
Vegetation/Animal - - 18% - - - - - - - - - 100% 99% 100% - - - 2% 5% - 36% 35% 53%
Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
Reliability Histories for Individual Circuits Serving San Dimas - 4 of 6
2017 2018 2019 1st Qtr 2020 2nd Qtr 2020 3rd Qtr 2020 4th Qtr 2020 2020
22
CircuitHistory5
SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI
MAYBELL(12KV) - Customers: 1,589 42.4 0.3 1.0 75.1 1.3 1.0 128.3 1.3 - 19.2 0.1 - 0.1 0.0 - 39.4 1.6 0.4 54.8 1.1 1.3 113.5 2.8 1.7
3rd Party 2% 4% - 17% 6% - - - - - - - - - - - - - - - - - - -
Equipment Failure 50% 16% 100% 65% 91% - 42% 11% - 2% 4% - - - - 3% 0% - 0% 0% 100% 1% 0% 74%
Operation 45% 75% - 19% 3% - 40% 83% - 24% 53% - 100% 100% - - - - 100% 100% - 52% 40% -
Other - - - - - 100% 5% 1% - - - - - - - 16% 36% 100% - - - 6% 21% 26%
Vegetation/Animal - - - - - - 13% 5% - - - - - - - - - - - - - - - -
Weather/Fire/Earthquake 4% 5% - - - - - - - 74% 42% - - - - 81% 64% - - - - 41% 39% -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
MICHELLE(12KV) - Customers: 1,056 0.3 0.0 - 45.0 0.7 1.0 37.4 0.1 1.0 - - - - - - 93.2 0.1 1.0 51.3 1.0 - 144.5 1.1 1.0
3rd Party - - - - - - - - 100% - - - - - - - - - - - - - - -
Equipment Failure - - - 41% 4% - - - - - - - - - - 100% 100% - 1% 0% - 65% 6% -
Operation 100% 100% - 2% 5% - 100% 100% - - - - - - - - - - 99% 100% - 35% 94% -
Other - - - 56% 90% 100% - - - - - - - - - - - 100% - - - - - 100%
Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - -
Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
NUBIA(12KV) - Customers: 1,357 378.0 3.4 3.3 240.5 2.5 6.0 2.1 0.0 - - - - 90.9 1.0 0.9 4.5 0.1 - 180.0 2.0 - 275.5 3.2 0.9
3rd Party - - - - - - - - - - - - - - - - - - - - - - - -
Equipment Failure 96% 97% 4% 89% 49% 33% 100% 100% - - - - 100% 100% 100% - - - 11% 49% - 40% 63% 100%
Operation 4% 2% - 5% 10% 17% - - - - - - - - - 100% 100% - 0% 1% - 2% 5% -
Other - - 32% 2% 1% 17% - - - - - - - - - - - - 88% 49% - 58% 31% -
Vegetation/Animal 0% 0% 64% 3% 40% 33% - - - - - - - - - - - - - - - - - -
Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
REEDER(12KV) - Customers: 1,489 66.9 1.1 1.0 19.8 0.0 - 154.5 1.0 1.5 0.1 0.0 - 1.7 0.0 0.6 81.6 1.7 0.5 51.0 1.0 - 134.3 2.7 1.1
3rd Party - - - 91% 89% - 7% 7% 68% - - - - - - - - - - - - - - -
Equipment Failure - - - - - - 5% 1% - - - - - - - 90% 65% - - - - 55% 41% -
Operation - - - 9% 11% - 33% 38% - 100% 100% - 100% 100% 100% 1% 1% - 100% 100% - 40% 38% 51%
Other 97% 99% 100% - - - 7% 3% - - - - - - - 9% 34% 100% - - - 5% 21% 49%
Vegetation/Animal 3% 1% - - - - - - - - - - - - - - - - - - - - - -
Weather/Fire/Earthquake - - - - - - 48% 50% 32% - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
Reliability Histories for Individual Circuits Serving San Dimas - 5 of 6
2017 2018 2019 1st Qtr 2020 2nd Qtr 2020 3rd Qtr 2020 4th Qtr 2020 2020
23
CircuitHistory6
SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI
RHOADS(12KV) - Customers: 2,411 41.2 0.2 5.1 189.8 3.0 2.0 132.6 3.0 1.0 0.5 0.0 1.6 5.5 0.1 - - - - 13.0 0.0 - 19.0 0.1 1.6
3rd Party - - - 1% 0% 50% 65% 33% 100% - - - - - - - - - - - - - - -
Equipment Failure 85% 69% 21% 59% 67% - 3% 0% - 100% 100% - - - - - - - - - - 3% 1% -
Operation 1% 19% - - - - - - - - - - 96% 100% - - - - - - - 28% 81% -
Other - - 43% - - - 9% 33% - - - - - - - - - - - - - - - -
Vegetation/Animal 13% 12% 35% 37% 33% 50% - - - - - 100% 4% 0% - - - - - - - 1% 0% 100%
Weather/Fire/Earthquake - - - 3% 0% - 23% 33% - - - - - - - - - - 100% 100% - 68% 18% -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
VIAVERDE(12KV) - Customers: 1,575 316.8 3.6 7.6 93.8 1.1 1.0 9.7 0.1 1.0 - - - 36.3 1.1 1.0 51.0 0.8 2.1 69.7 1.0 - 157.1 2.9 3.1
3rd Party - - - - - - - - - - - - - - - - - 54% - - - - - 37%
Equipment Failure 100% 100% 100% 24% 7% 100% 76% 60% - - - - 93% 98% 93% 81% 48% 1% 27% 3% - 60% 52% 31%
Operation 0% 0% - - - - 24% 40% - - - - 7% 2% 7% 16% 26% - 73% 97% - 39% 41% 2%
Other - - - 76% 93% - - - - - - - - - - 3% 26% 45% - - - 1% 7% 30%
Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - -
Weather/Fire/Earthquake - - - - - - - - 100% - - - - - - - - - - - - - - -
PSPS - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - -
Reliability Histories for Individual Circuits Serving San Dimas - 6 of 6
2017 2018 2019 1st Qtr 2020 2nd Qtr 2020 3rd Qtr 2020 4th Qtr 2020 2020
24