massoutage

County annual report · FIPS 24019

2015 Dorchester County, MD Power Outage Report

In 2015, customers in Dorchester County, MD went without power for an average of 1.2 hours, a total of 22K customer-hours (Maryland average 2.0 hours). That ranks 20th worst of 24 Maryland counties and 1650th of 2,484 nationally.

Summary data CSVJSON
Avg hrs / customer
1.2
18,093 customers
Customer-hours out
22K
Peak customers out
2,493
Outages ≥1,000 out
4
0 of 10,000+ · 337 total
Longest outage
9h 30m
began May 16, 2015
Rank in state
20th/24
1650th of 2,484 US

Compared with MD, the US

Dorchester County, MD average hours without power per customer compared with state and national averages, 2015Dorchester County 1.2 hours, Maryland average 2.0 hours, US average 2.9 hoursDorchester CountyDorchester County1.2hMaryland averageMaryland average2.0hUS averageUS average2.9h
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Average hours without power per customer in 2015.

Month by month

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Dorchester County, MD customer-hours without power by month, 2015Jan 0, Feb 0, Mar 0, Apr 0, May 240, Jun 3,259, Jul 2,242, Aug 5,531, Sep 3,706, Oct 3,295, Nov 3,218, Dec 22902k4k6k0Jan0Feb0Mar0Apr240May3,259Jun2,242Jul5,531Aug3,706Sep3,295Oct3,218Nov229Dec
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Customer-hours; August was the worst month.

Dorchester County year over year

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Dorchester County, MD: average hours without power per customer by year2015: 1.2h; 2016: 2.7h; 2017: 1.9h; 2018: 1.5h, coverage 98%; 2019: 1.6h, coverage 97%; 2020: 4.1h, coverage 98%; 2021: 2.7h, coverage 99%; 2022: 2.0h, coverage 99%; 2023: 1.6h; 2024: 2.2h; 2025: 2.5h02460%50%100%1.2h20152.7h20161.9h20171.5h20181.6h20194.1h20202.7h20212.0h20221.6h20232.2h20242.5h2025
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Average hours without power per customer. Line: EAGLE-I coverage, share of customers tracked (right axis).

Coverage line is EAGLE-I's share of Maryland customers tracked each year.

Biggest outages in Dorchester County, 2015

The 10 outage episodes with the most customers out at once. Times are UTC.

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#Started (UTC)Ended (UTC)DurationPeak outCustomer-hours
1September 23, 2015 12:30September 23, 2015 13:0030m2,4931,247
2November 7, 2015 13:45November 7, 2015 16:002h 15m1,432922
3June 12, 2015 15:15June 12, 2015 16:0045m1,353677
4August 21, 2015 03:30August 21, 2015 09:005h 30m1,2232,692
5October 9, 2015 19:00October 9, 2015 20:151h 15m922923
6June 29, 2015 11:45June 29, 2015 13:151h 30m895898
7September 6, 2015 15:00September 6, 2015 16:451h 45m8571,491
8July 10, 2015 17:00July 10, 2015 23:456h 45m6951,431
9August 22, 2015 20:15August 23, 2015 00:003h 45m538282
10October 3, 2015 17:30October 3, 2015 21:454h 15m4101,289

Outage episodes by size in 2015: 25 reached 100+ customers, 4 reached 1,000+ customers, 0 reached 10,000+ customers.

Utility reliability filed with the EIA

SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Dorchester County reported on EIA Form 861 for 2015, or their most recent earlier filing. Utility-wide figures, not county-specific.

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UtilityEIA yearSAIDISAIFISAIDI excl. major eventsSAIFI excl. major events
Delmarva Power20153.5 hrs1.421.9 hrs1.22
Choptank Electric Cooperative, Inc20152.7 hrs1.771.7 hrs1.26

About this data

  • Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Maryland's customers in 2015; utilities it does not see are not counted.
  • Hours per customer = outage customer-minutes ÷ 18,093 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
  • An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
  • Years loaded: 2015–2025. Dorchester County has data for 2015–2025.

Cite this report

MassOutage (massoutage.com), Dorchester County, MD annual power outage report, 2015, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2015/maryland/dorchester-county

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