San Dimas January 2018 - Southern California Edison · Circuit Reliability Review San Dimas January...

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Circuit Reliability Review San Dimas January 2018

Transcript of San Dimas January 2018 - Southern California Edison · Circuit Reliability Review San Dimas January...

Circuit Reliability Review San Dimas

January 2018

Building a Smarter Grid for Southern California

• Southern California Edison is developing an electric grid to support California’s transition to a clean and sustainable future that meets the needs and expectations of our customers.

• We are investing more than $13 billion in the power distribution grid over three years (2017-19). Our main investment goal is to increase power reliability through significant upgrades. The investments include:

• Upgrading cables, poles, switches and transformers

• Updating the grid so it can accommodate new technologies, such as smart inverters that will allow for the two-way flow of solar energy

• Adapting the power system to accommodate future California policy related to energy storage, electric transportation and renewable energy

• Providing enhanced automation and monitoring devices to allow us to better respond to changes on the grid

• Our investments in local communities will help ensure that customers receive safe, reliable, and affordable electricity now and in the future.

• Learn more at edison.com/innovation

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Understanding Your Reliability Report

• As your electric utility, we want you to always have power when you need it. To

get there, we constantly track and monitor electric outages across our service

territory, and we measure our “system reliability” from this data.

• The two metrics we rely on are common in the electric utility industry: the

System Average Interruption Duration Index (SAIDI) and the System Average

Interruption Frequency Index (SAIFI). Both are described in more detail on the

next page.

• Replacing and upgrading our infrastructure will help SCE maintain or improve

SAIDI and SAIFI measurements.

• This report provides historical reliability data for the circuits that serve your

jurisdiction and our proposed infrastructure upgrades for the current year.

• To view other reliability reports, visit sce.com>Outage Center>Maintaining

Reliable Service

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Reliability Metrics

MOMENTARY OUTAGES:

OUTAGES LASTING 5 MINUTES OR LESS

MAIFI:

o The number of times the average customer is interrupted by Momentary outages each year.

SUSTAINED OUTAGES:

OUTAGES LASTING LONGER THAN 5 MINUTES

SAIFI:

o The number of times the average customer is interrupted by Sustained outages each year.

SAIDI:

o The cumulative amount of time the average customer is interrupted by Sustained outages each year.

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CityList1Cities in the COVINA District

AZUSA

CHARTER OAK

CITRUS

CLAREMONT

COVINA

DIAMOND BAR

AVOCADO HEIGHTS

SOUTH SAN JOSE HILLS

VALINDA

VINCENT

WALNUT

GLENDORA

HACIENDA HEIGHTS

INDUSTRY

LA PUENTE

WEST COVINA

WEST PUENTE VALLEY

ROWLAND HEIGHTS

SAN DIMAS

LA VERNE

POMONA

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*”Exclusions” are days which utilities are allowed to remove from their metrics because the outages on those days were caused by a severe acts of nature.**In the columns showing “Rank,” lower numbers indicate poorer performance.

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CircuitList1Overview of San DimasThere are 23 circuits that serve San Dimas 1

Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers

APPLE(12KV) 1,817 - - -

AVENIDA(12KV) 1,536 - - -

BANANA(12KV) 1,250 - - -

BONITA(12KV) 1,262 - - -

BRYDON(12KV) 1,536 - - -

CAL POLY(12KV) 1,006 - - -

CALORA(12KV) 660 - - -

CARLET(12KV) 1,828 - - -

CATARACT(12KV) 1,441 - - -

CEYLON(12KV) 1,249 - - -

CREVOLIN(12KV) 1,282 - - -

DURWARD(12KV) 202 - - -

EGMONT(12KV) 840 - - -

FOOTHILL(12KV) 1,314 - - -

GLADSTONE(12KV) 798 - - -

KRANZER(12KV) 1,403 - - -

KUMQUAT(12KV) 2,083 - - -

MAYBELL(12KV) 1,619 - - -

MICHELLE(12KV) 1,090 - - -

NUBIA(12KV) 1,802 - - -

REEDER(12KV) 1,624 - - -

RHOADS(12KV) 2,365 - - -

VIAVERDE(12KV) 1,683 - - -

- - - -

- - - -

- - - -

- - - -

- - - -

- - - -

- - - -

Grand Total 31,690

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BarChart

SCE SYSTEMWIDE

**Data is as of 02/20/2018, 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.

95.7

80.3

55.4

138.3

112.1 114.8

134.5 139.7

0.0

20.0

40.0

60.0

80.0

100.0

120.0

140.0

160.0

2014 2015 2016 2017

SAIDI

(average

minutes of

sustained

interruptions)

0.8

0.7 0.7

1.3

1.0 0.9

1.11.2

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

SAIFI

(average

frequency of

sustained

interruptions)

2.4

1.6

3.1

2.5

1.4 1.41.6

1.8

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

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

2017

3rd Party

17.1%

Equipment Failure

63.5%

Operation

5.2%

Other

3.8%

Vegetation /Animal

4.0%

Weather /Fire

/Earthquake

6.4%

Contributions to SAIDI by Outage Cause

3rd Party

Equipment Failure

Operation

Other

Vegetation /Animal

Weather /Fire /Earthquake

Equipment Failure

e.g., in-service failure of transformer, switch, or conductors

Vegetation/Animale.g., tree branch, rodent, or bird

causing a short circuit between conductors

Othere.g., patrolled but no cause found

Operationse.g., urgent maintenance w/o 3-day

notice 3rd Party

e.g., balloon, car hit pole, dig-in

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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

2017

3rd Party

14.9%

Equipment Failure

62.3%

Operation

8.1%

Other

5.6%

Vegetation /Animal

4.2%

Weather /Fire

/Earthquake

4.8%

Contributions to SAIFI by Outage Cause

3rd Party

Equipment Failure

Operation

Other

Vegetation /Animal

Weather /Fire /Earthquake

Equipment Failure

e.g., in-service failure of transformer, switch, or conductors

Vegetation/Animale.g., tree branch, rodent, or bird

causing a short circuit between conductors

Othere.g., patrolled but no cause found

Operationse.g., urgent maintenance w/o 3-day

notice 3rd Party

e.g., balloon, car hit pole, dig-in

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Back-up Slides

Reliability Histories of Circuits Serving San Dimas

Updated through Dec 2017

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

95.7 0.8 2.4 80.3 0.7 1.6 55.4 0.7 3.1 32.3 0.4 0.7 15.4 0.1 0.5 38.2 0.3 0.7 52.5 0.5 0.6 138.3 1.3 2.5

3rd Party 19% 9% 10% 18% 17% 22% 4% 5% 21% 2% 8% 20% 6% 2% 21% 1% 0% - 41% 33% 12% 17% 15% 12%

Equipment Failure 49% 39% 18% 45% 43% 6% 64% 42% 7% 81% 65% 64% 79% 79% 15% 73% 81% 47% 41% 44% 8% 63% 62% 35%

Operation 8% 11% 13% 19% 8% 0% 11% 15% 2% 9% 18% - 3% 10% - 6% 4% 7% 3% 2% - 5% 8% 2%

Other 1% 1% 23% 13% 29% 61% 4% 1% 34% 2% 1% 5% 6% 5% 18% 0% 0% 31% 7% 13% 16% 4% 6% 18%

Vegetation/Animal 15% 30% 30% 4% 3% 12% 5% 21% 33% 1% 0% 7% 2% 3% 38% 2% 5% 15% 8% 8% 65% 4% 4% 30%

Weather/Fire/Earthquake 9% 9% 5% 1% 0% - 11% 16% 4% 5% 7% 5% 4% 2% 7% 17% 10% - 0% 0% - 6% 5% 3%

SCE SYSTEMWIDE 112.1 1.0 1.4 114.8 0.9 1.4 134.5 1.1 1.6 42.6 0.3 0.5 23.6 0.2 0.4 29.2 0.2 0.4 44.3 0.4 0.5 139.7 1.2 1.8

Average Reliability of 23 Circuits Serving San Dimas

4th Qtr 2017 20172014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017

23 Circuits Serving San Dimas -- Total Customers:

31,690

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 conductors

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: 1,817 7.7 0.0 2.0 72.9 0.1 - 127.3 1.3 1.2 3.7 0.4 0.6 - - - 0.9 0.0 - 60.4 1.0 - 64.9 1.4 0.6

3rd Party - - 50% 54% 37% - - - - 100% 100% 100% - - - 100% 100% - 100% 100% - 100% 100% 100%

Equipment Failure 56% 9% 50% 37% 17% - 100% 100% 100% - - - - - - - - - - - - - - -

Operation 44% 91% - 9% 46% - - - - - - - - - - - - - - - - - - -

Other - - - - - - - - - - - - - - - - - - - - - - - -

Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - -

Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -

AVENIDA(12KV) - Customers: 1,536 348.4 4.0 3.0 345.9 1.4 0.6 76.4 1.1 5.5 - - - - - - 1.4 0.0 1.0 162.7 1.2 1.0 164.0 1.2 2.0

3rd Party - - - 26% 8% - - - 36% - - - - - - - - - 7% 4% - 7% 4% -

Equipment Failure 41% 25% - 70% 86% - - - - - - - - - - - - - 89% 86% 100% 89% 86% 50%

Operation 1% 1% 33% 3% 5% - 4% 7% - - - - - - - 31% 25% - 4% 10% - 4% 10% -

Other - - - - - 100% - - 27% - - - - - - - - 100% - - - - - 50%

Vegetation/Animal 58% 75% 67% 1% 1% - - - 36% - - - - - - 69% 75% - - - - 1% 0% -

Weather/Fire/Earthquake - - - - - - 96% 93% - - - - - - - - - - - - - - - -

BANANA(12KV) - Customers: 1,250 0.1 0.0 1.0 15.0 1.1 1.9 0.7 0.0 2.0 3.9 0.1 0.9 37.4 0.0 3.0 8.3 0.0 1.0 - - - 49.7 0.2 4.9

3rd Party 100% 100% - - - - - - 100% 46% 65% 100% 62% 72% 66% - - - - - - 51% 63% 59%

Equipment Failure - - 100% 45% 8% 48% - - - - - - - - - 100% 100% 100% - - - 17% 5% 21%

Operation - - - - - - 100% 100% - 54% 35% - - - - - - - - - - 4% 26% -

Other - - - 55% 92% - - - - - - - - - - - - - - - - - - -

Vegetation/Animal - - - - - 52% - - - - - - - - - - - - - - - - - -

Weather/Fire/Earthquake - - - - - - - - - - - - 38% 28% 34% - - - - - - 28% 6% 21%

BONITA(12KV) - Customers: 1,262 171.3 1.4 1.8 - - 1.0 66.1 1.0 6.0 - - - 56.0 1.0 0.9 9.0 0.1 - 21.4 1.0 1.0 86.4 2.1 1.9

3rd Party - - - - - - - - 33% - - - - - - - - - - - - - - -

Equipment Failure 26% 11% - - - - 100% 100% - - - - 100% 100% 100% 100% 100% - 100% 100% - 100% 100% 46%

Operation - - 55% - - - - - - - - - - - - - - - - - - - - -

Other - - - - - 100% - - 33% - - - - - - - - - - - 100% - - 54%

Vegetation/Animal 74% 89% 45% - - - - - 33% - - - - - - - - - - - - - - -

Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -

Reliability Histories for Individual Circuits Serving San Dimas - 1 of 6

2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017

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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: 1,536 188.7 2.3 1.1 32.7 0.1 1.0 35.6 0.1 7.4 16.4 0.1 - 3.3 0.0 - 23.2 0.0 0.0 191.4 1.0 1.0 234.3 1.2 1.0

3rd Party - - - - - - 45% 20% 29% 18% 10% - - - - - - - 98% 97% - 82% 87% -

Equipment Failure 35% 6% 5% 91% 93% - - - - - - - 36% 50% - - - - - - - 1% 1% -

Operation 19% 26% 45% 1% 1% - - - - 82% 90% - - - - 100% 100% - - - - 16% 7% -

Other 2% 1% 2% - - 97% 14% 20% 29% - - - - - - - - 100% 1% 0% - 0% 0% 3%

Vegetation/Animal 10% 44% 3% 8% 6% 3% 42% 59% 43% - - - - - - - - - 1% 3% 100% 1% 3% 97%

Weather/Fire/Earthquake 34% 23% 45% - - - - - - - - - 64% 50% - - - - - - - 1% 1% -

CAL POLY(12KV) - Customers: 1,006 342.8 0.3 1.0 6.8 0.1 2.0 28.3 1.0 0.1 383.3 1.0 1.0 - - - 200.3 1.0 2.0 125.7 1.0 1.0 709.3 3.0 4.0

3rd Party 100% 100% 100% - - - 100% 100% - - - - - - - - - - - - 100% - - 25%

Equipment Failure - - - - - - - - - 100% 100% - - - - - - - - - - 54% 33% -

Operation - - - 100% 100% - - - 100% - - - - - - - - - 6% 1% - 1% 0% -

Other - - - - - 48% - - - - - 100% - - - - - 50% - - - - - 50%

Vegetation/Animal - - - - - 52% - - - - - - - - - - - 50% 94% 99% - 17% 33% 25%

Weather/Fire/Earthquake - - - - - - - - - - - - - - - 100% 100% - - - - 28% 33% -

CALORA(12KV) - Customers: 660 47.3 1.0 3.8 89.7 0.2 1.0 92.7 1.1 6.9 1.6 0.0 - - - - - - - - - - 1.6 0.0 -

3rd Party - - - 25% 42% - - - 29% - - - - - - - - - - - - - - -

Equipment Failure 98% 98% 21% - - - - - - - - - - - - - - - - - - - - -

Operation 2% 2% 27% - - - 100% 100% - 100% 100% - - - - - - - - - - 100% 100% -

Other - - - 75% 58% 100% - - 43% - - - - - - - - - - - - - - -

Vegetation/Animal - - 53% - - - - - 29% - - - - - - - - - - - - - - -

Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -

CARLET(12KV) - Customers: 1,828 20.3 0.5 2.5 162.8 1.1 3.0 17.9 1.0 3.2 41.0 0.6 0.5 - - - 25.1 0.3 0.9 18.6 0.2 1.0 84.7 1.1 2.4

3rd Party - - - 41% 48% 50% - - - - - - - - - 28% 6% - - - - 8% 2% -

Equipment Failure - - - 56% 48% 17% - - - - - - - - - - - - - - - - - -

Operation 100% 100% 20% 3% 4% - 7% 0% - - - - - - - 23% 18% - 8% 3% - 8% 6% -

Other - - 40% - - 33% - - 65% 27% 15% - - - - - - - 92% 97% - 33% 24% -

Vegetation/Animal - - 40% - - - 93% 100% 35% - - - - - - 49% 76% 100% - - 100% 15% 23% 79%

Weather/Fire/Earthquake - - - - - - - - - 73% 85% 100% - - - - - - - - - 35% 45% 21%

Reliability Histories for Individual Circuits Serving San Dimas - 2 of 6

2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017

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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: 1,441 0.9 0.0 2.0 0.6 0.0 1.0 21.4 1.0 8.8 - - - - - 1.0 4.6 0.0 - - - 1.0 4.6 0.0 2.0

3rd Party - - - - - - - - - - - - - - - - - - - - - - - -

Equipment Failure - - - 100% 100% - 54% 2% 27% - - - - - - 83% 36% - - - - 83% 36% -

Operation 100% 100% 50% - - - - - - - - - - - - 17% 64% - - - - 17% 64% -

Other - - - - - 100% - - 42% - - - - - - - - - - - - - - -

Vegetation/Animal - - 50% - - - 46% 98% 31% - - - - - 100% - - - - - 100% - - 100%

Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -

CEYLON(12KV) - Customers: 1,249 348.3 2.0 1.1 39.1 0.1 1.0 87.5 2.3 4.2 - - - 172.5 0.4 2.0 - - - - - 1.0 172.5 0.4 3.0

3rd Party - - - - - 100% - - 26% - - - - - 51% - - - - - 100% - - 67%

Equipment Failure 99% 96% 99% 17% 28% - 3% 1% - - - - 90% 58% - - - - - - - 90% 58% -

Operation 1% 4% 1% 31% 51% - 31% 4% - - - - 6% 30% - - - - - - - 6% 30% -

Other - - - - - - - - - - - - - - - - - - - - - - - -

Vegetation/Animal - - - - - - 15% 38% - - - - 4% 12% 49% - - - - - - 4% 12% 33%

Weather/Fire/Earthquake - - - 52% 21% - 52% 57% 74% - - - - - - - - - - - - - - -

CREVOLIN(12KV) - Customers: 1,282 3.8 0.1 1.0 69.8 0.2 2.0 10.7 0.0 - - - - - - - 31.5 0.2 - - - - 31.5 0.2 -

3rd Party - - - - - - - - - - - - - - - - - - - - - - - -

Equipment Failure - - - 38% 12% - 100% 100% - - - - - - - 100% 100% - - - - 100% 100% -

Operation 100% 100% - 62% 88% - - - - - - - - - - - - - - - - - - -

Other - - - - - 100% - - - - - - - - - - - - - - - - - -

Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - -

Weather/Fire/Earthquake - - 100% - - - - - - - - - - - - - - - - - - - - -

DURWARD(12KV) - Customers: 202 140.3 2.0 2.1 38.7 0.2 - 0.8 0.0 - - - - 1.5 0.0 - - - - - - - 1.5 0.0 -

3rd Party - - - - - - - - - - - - - - - - - - - - - - - -

Equipment Failure 51% 47% 7% - - - - - - - - - 100% 100% - - - - - - - 100% 100% -

Operation 26% 3% - 100% 100% - 100% 100% - - - - - - - - - - - - - - - -

Other 1% 0% 47% - - - - - - - - - - - - - - - - - - - - -

Vegetation/Animal 22% 49% 46% - - - - - - - - - - - - - - - - - - - - -

Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -

Reliability Histories for Individual Circuits Serving San Dimas - 3 of 6

2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017

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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

EGMONT(12KV) - Customers: 840 - - 1.0 172.8 0.3 1.0 196.4 1.0 1.0 61.1 1.1 - 33.0 0.2 - 27.6 0.3 2.4 6.0 0.1 - 127.6 1.7 2.4

3rd Party - - - - - - - - - - - - - - - - - - - - - - - -

Equipment Failure - - - - - - 100% 100% - 77% 94% - 95% 75% - 97% 100% 59% - - - 82% 88% 59%

Operation - - - 100% 99% - - - - 23% 6% - 5% 25% - - - - - - - 12% 7% -

Other - - 100% - - 100% - - 100% - - - - - - - - - - - - - - -

Vegetation/Animal - - - 0% 1% - - - - - - - - - - 3% 0% 41% 100% 100% - 5% 5% 41%

Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -

FOOTHILL(12KV) - Customers: 1,314 18.5 0.2 2.6 0.2 0.0 2.0 27.2 0.6 3.6 7.4 0.0 - 23.8 0.1 - 0.3 0.0 - 0.3 0.0 1.0 31.7 0.1 1.0

3rd Party - - - - - - - - - - - - - - - - - - - - - - - -

Equipment Failure - - - - - - 1% 0% - - - - 96% 85% - - - - - - - 72% 47% -

Operation 100% 100% 24% 100% 100% - 13% 8% - 100% 100% - 4% 15% - 100% 100% - 100% 100% - 28% 53% -

Other - - 38% - - 50% - - 55% - - - - - - - - - - - - - - -

Vegetation/Animal - - 38% - - 50% 22% 61% 45% - - - - - - - - - - - 100% - - 100%

Weather/Fire/Earthquake - - - - - - 64% 30% - - - - - - - - - - - - - - - -

GLADSTONE(12KV) - Customers: 798 144.4 1.0 4.4 42.5 1.0 3.0 - - 3.6 - - - 10.2 0.1 2.0 - - - - - 1.0 10.2 0.1 3.0

3rd Party 16% 3% 44% - - 33% - - - - - - - - - - - - - - - - - -

Equipment Failure 84% 97% 10% 100% 100% - - - - - - - - - - - - - - - - - - -

Operation 0% 0% 23% - - - - - - - - - - - - - - - - - - - - -

Other - - - - - 67% - - 50% - - - 100% 100% 100% - - - - - - 100% 100% 67%

Vegetation/Animal - - 23% - - - - - 50% - - - - - - - - - - - 100% - - 33%

Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -

KRANZER(12KV) - Customers: 1,403 - - 2.0 84.9 1.1 2.0 271.8 1.4 5.1 - - - - - - - - - 194.5 1.0 1.0 194.5 1.0 1.0

3rd Party - - - - - - - - - - - - - - - - - - 100% 100% - 100% 100% -

Equipment Failure - - - 75% 92% - 95% 95% - - - - - - - - - - - - - - - -

Operation - - 50% 25% 8% - - - - - - - - - - - - - - - - - - -

Other - - - - - 50% 5% 5% 50% - - - - - - - - - - - - - - -

Vegetation/Animal - - 50% - - 50% - - 50% - - - - - - - - - - - 100% - - 100%

Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -

Reliability Histories for Individual Circuits Serving San Dimas - 4 of 6

2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017

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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

KUMQUAT(12KV) - Customers: 2,083 189.6 1.3 3.9 14.5 0.1 - 5.9 0.0 2.0 81.3 2.1 1.8 - - 1.0 147.0 1.9 2.7 - - - 228.4 4.0 5.6

3rd Party 41% 77% - - - - - - - 2% 5% 49% - - - - - - - - - 1% 3% 16%

Equipment Failure 55% 15% 26% 32% 43% - 62% 68% - 87% 55% 51% - - - 92% 97% 73% - - - 90% 75% 53%

Operation - - - 68% 57% - 38% 32% 50% 11% 41% - - - - 8% 3% 27% - - - 9% 23% 13%

Other 4% 8% 49% - - - - - - - - - - - - - - - - - - - - -

Vegetation/Animal - - 26% - - - - - 50% - - - - - 100% - - - - - - - - 18%

Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -

MAYBELL(12KV) - Customers: 1,619 38.2 0.2 3.0 139.1 1.7 3.2 53.8 0.1 1.0 19.0 0.2 - 21.1 0.0 1.0 - - - 2.4 0.0 - 42.4 0.3 1.0

3rd Party - - 33% 28% 37% 74% - - 100% - - - - - - - - - 30% 46% - 2% 4% -

Equipment Failure 44% 13% - 33% 49% - 81% 73% - - - - 100% 100% 100% - - - - - - 50% 16% 100%

Operation 7% 68% - 5% 2% - 14% 11% - 100% 100% - - - - - - - - - - 45% 75% -

Other - - 33% 20% 4% 26% 5% 15% - - - - - - - - - - - - - - - -

Vegetation/Animal - - 33% 13% 7% - - - - - - - - - - - - - - - - - - -

Weather/Fire/Earthquake 49% 18% - - - - - - - - - - - - - - - - 70% 54% - 4% 5% -

MICHELLE(12KV) - Customers: 1,090 - - - 164.3 2.0 3.0 90.4 2.1 2.0 - - - - - - - - - 0.3 0.0 - 0.3 0.0 -

3rd Party - - - 10% 51% 33% 20% 2% - - - - - - - - - - - - - - - -

Equipment Failure - - - 67% 4% - 8% 48% 50% - - - - - - - - - - - - - - -

Operation - - - - - - 25% 46% - - - - - - - - - - 100% 100% - 100% 100% -

Other - - - 15% 41% 67% 43% 3% 50% - - - - - - - - - - - - - - -

Vegetation/Animal - - - 8% 5% - - - - - - - - - - - - - - - - - - -

Weather/Fire/Earthquake - - - - - - 4% 1% - - - - - - - - - - - - - - - -

NUBIA(12KV) - Customers: 1,802 80.4 1.2 2.8 7.1 0.0 3.0 36.8 0.9 7.5 0.4 0.0 - 16.2 0.0 1.1 92.1 1.1 0.1 269.4 2.3 2.1 378.0 3.4 3.3

3rd Party - - - - - - - - 30% - - - - - - - - - - - - - - -

Equipment Failure - - - 100% 100% 33% - - - 100% 100% - 96% 50% - 100% 100% 100% 95% 97% - 96% 97% 4%

Operation 28% 19% 29% - - - 100% 100% - - - - 4% 50% - - - - 5% 3% - 4% 2% -

Other - - - - - 67% - - 30% - - - - - - - - - - - 50% - - 32%

Vegetation/Animal 72% 81% 71% - - - - - 40% - - - - - 100% - - - 0% 0% 50% 0% 0% 64%

Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -

Reliability Histories for Individual Circuits Serving San Dimas - 5 of 6

2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017

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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

REEDER(12KV) - Customers: 1,624 88.3 1.1 - 37.7 0.1 1.0 3.6 0.0 - - - - 11.8 0.0 1.0 4.6 0.0 - 50.5 1.0 - 66.9 1.1 1.0

3rd Party - - - - - - - - - - - - - - - - - - - - - - - -

Equipment Failure 6% 4% - 17% 11% - 86% 45% - - - - - - - - - - - - - - - -

Operation 1% 1% - 8% 6% - 14% 55% - - - - - - - - - - - - - - - -

Other - - - 75% 83% 100% - - - - - - 100% 100% 100% 55% 84% - 100% 100% - 97% 99% 100%

Vegetation/Animal 0% 1% - - - - - - - - - - - - - 45% 16% - - - - 3% 1% -

Weather/Fire/Earthquake 92% 95% - - - - - - - - - - - - - - - - - - - - - -

RHOADS(12KV) - Customers: 2,365 - - 2.9 131.2 1.2 5.0 126.3 1.1 4.0 5.5 0.0 0.7 - - - 35.6 0.1 3.3 - - 1.1 41.2 0.2 5.1

3rd Party - - - - - - - - - - - - - - - - - - - - - - - -

Equipment Failure - - - - - - 100% 100% - - - - - - - 99% 78% 33% - - - 85% 69% 21%

Operation - - 32% 26% 5% - - - - - - - - - - 1% 22% - - - - 1% 19% -

Other - - 32% 57% 87% 80% - - 50% - - - - - - - - 67% - - - - - 43%

Vegetation/Animal - - 35% 16% 9% 20% - - 50% 100% 100% 100% - - - - - - - - 100% 13% 12% 35%

Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - -

VIAVERDE(12KV) - Customers: 1,683 80.6 1.3 7.3 129.0 2.3 1.0 1.2 0.0 0.9 148.5 2.4 6.6 - - - 168.3 1.2 1.0 - - - 316.8 3.6 7.6

3rd Party - - - - - - - - 100% - - - - - - - - - - - - - - -

Equipment Failure 91% 96% 32% 67% 53% - - - - 100% 100% 100% - - - 100% 99% 100% - - - 100% 100% 100%

Operation 6% 3% - 17% 3% 0% - - - - - - - - - 0% 1% - - - - 0% 0% -

Other - - 27% 16% 44% 100% - - - - - - - - - - - - - - - - - -

Vegetation/Animal - - 27% - - - - - - - - - - - - - - - - - - - - -

Weather/Fire/Earthquake 3% 1% 14% - - - 100% 100% - - - - - - - - - - - - - - - -

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Reliability Histories for Individual Circuits Serving San Dimas - 6 of 6

2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017

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