While performing cleanup duties, the employee turned body to take a step and dislocated left knee.
Boonsboro Quarry: 73 MSHA citations Metal/Non-Metal
Boonsboro Quarry has $9K in proposed MSHA penalties and $624 outstanding across 4 contested dockets, plus health sampling and the full incident record.
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- Fatalities
- 0
- Total incidents
- 18
- Years on record
- 1983–2024
- Latest incident
- Aug 2024
ⓘ
This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.Boonsboro Quarry has $9K in proposed MSHA penalties and $624 outstanding across 4 contested dockets.
ⓘ
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.ⓘ
Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.ⓘ
Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.- Settled 3 · 75%
- Vacated or withdrawn 1 · 25%
ⓘ
Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.ⓘ
A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.| Docket | Decision | Judge | Year | Proposed / upheld |
|---|---|---|---|---|
| YORK 2012-290M | Settlement | Lesnick | 2013 | $425 → $127 |
| YORK 2006-13M | Settlement | Lesnick | 2006 | $400 → $400 |
| YORK 2009-140M | Settlement | Lesnick | 2011 | $285 → $100 |
| YORK 2012-156M | Withdrawal | Lesnick | 2013 | $176 → $0 |
ⓘ
A sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.Metal and nonmetal contaminants (personal samples)
ⓘ
Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.
Last sampled: 2026-07-15
ⓘ
Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.- Respirable dust, <.1mg44
- Nuisance dust, respirable, <1% Qtz10
- Quartz, respirable, >1% Qtz8
- Unlisted Particulate, respirable, <1% Qtz2
Show the individual readings (64)
| Date | Contaminant | Concentration | Limit | Conc / limit | Occupation |
|---|---|---|---|---|---|
| 2026-07-15 | Respirable dust, <.1mg | 0 | Truck Driver | ||
| 2026-07-15 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2026-07-15 | Respirable dust, <.1mg | 0 | Lab Technician | ||
| 2026-07-15 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2025-11-14 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2025-11-14 | Respirable dust, <.1mg | 0 | Truck Driver | ||
| 2025-11-14 | Respirable dust, <.1mg | 0 | Crusher Oper/Worker | ||
| 2025-08-12 | Respirable dust, <.1mg | 0 | Truck Driver | ||
| 2025-08-12 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2025-08-12 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2025-08-12 | Respirable dust, <.1mg | 0 | Dry Screen Plant Operator | ||
| 2025-08-12 | Respirable dust, <.1mg | 0 | Utility Man | ||
| 2024-12-10 | Respirable dust, <.1mg | 0 | Rotary Bucket Ex. Operator | ||
| 2024-12-10 | Respirable dust, <.1mg | 0 | Crusher Oper/Worker | ||
| 2024-12-10 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2024-12-10 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2024-12-10 | Respirable dust, <.1mg | 0 | Truck Driver | ||
| 2024-06-18 | Respirable dust, <.1mg | 0 | Crusher Oper/Worker | ||
| 2024-06-18 | Nuisance dust, respirable, <1% Qtz | 0.14 | 10 | 0.01 | Lab Technician |
| 2024-06-18 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2024-06-18 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2023-04-19 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2023-04-19 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2023-04-19 | Nuisance dust, respirable, <1% Qtz | 0.14 | 10 | 0.01 | Drill Operator, Rotary |
| 2022-05-24 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2022-05-24 | Respirable dust, <.1mg | 0 | Dump Operator | ||
| 2022-05-24 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2022-05-24 | Respirable dust, <.1mg | 0 | Truck Driver | ||
| 2022-05-24 | Respirable dust, <.1mg | 0 | Truck Driver | ||
| 2020-10-21 | Respirable dust, <.1mg | 0 | Crusher Oper/Worker | ||
| 2020-10-21 | Nuisance dust, respirable, <1% Qtz | 0.88 | 10 | 0.09 | Lab Technician |
| 2020-10-21 | Respirable dust, <.1mg | 0 | Utility Man | ||
| 2020-10-21 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2019-05-21 | Respirable dust, <.1mg | 0 | Crusher Oper/Worker | ||
| 2019-05-21 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2019-05-21 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2019-05-21 | Respirable dust, <.1mg | 0 | Laborer, Bullgang | ||
| 2019-05-21 | Nuisance dust, respirable, <1% Qtz | 0.13 | 10 | 0.01 | Truck Driver |
| 2016-11-02 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2016-11-02 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2016-11-02 | Unlisted Particulate, respirable, <1% Qtz | 0.35 | Dry Screen Plant Operator | ||
| 2016-11-02 | Unlisted Particulate, respirable, <1% Qtz | 0.12 | Utility Man | ||
| 2016-11-02 | Respirable dust, <.1mg | 0 | Truck Driver | ||
| 2013-11-21 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2013-11-21 | Quartz, respirable, >1% Qtz | 0.5 | 2.7 | 0.19 | Laborer, Bullgang |
| 2013-11-21 | Respirable dust, <.1mg | 0 | Crusher Oper/Worker | ||
| 2013-11-21 | Respirable dust, <.1mg | 0 | Truck Driver | ||
| 2013-11-21 | Nuisance dust, respirable, <1% Qtz | 0.15 | 10 | 0.02 | Truck Driver |
| 2009-10-28 | Quartz, respirable, >1% Qtz | 0.29 | 2.2 | 0.13 | Crusher Oper/Worker |
| 2009-10-28 | Quartz, respirable, >1% Qtz | 0.65 | 1.92 | 0.34 | Truck Loader |
| 2007-10-03 | Nuisance dust, respirable, <1% Qtz | 0.42 | 10 | 0.04 | Crusher Oper/Worker |
| 2007-10-03 | Nuisance dust, respirable, <1% Qtz | 0.21 | 10 | 0.02 | Truck Driver |
| 2007-10-03 | Nuisance dust, respirable, <1% Qtz | 0.33 | 10 | 0.03 | Truck Driver |
| 2005-12-14 | Quartz, respirable, >1% Qtz | 0.5 | 1.94 | 0.26 | Drill Operator, Rotary |
| 2005-08-18 | Nuisance dust, respirable, <1% Qtz | 0.37 | 10 | 0.04 | Crusher Oper/Worker |
| 2005-08-18 | Quartz, respirable, >1% Qtz | 0.4 | 1.01 | 0.40 | Truck Driver |
| 2005-08-18 | Respirable dust, <.1mg | 0 | Scale Man | ||
| 2005-08-18 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2005-08-18 | Quartz, respirable, >1% Qtz | 0.12 | 0.83 | 0.14 | Truck Driver |
| 2001-04-24 | Quartz, respirable, >1% Qtz | 0.76 | 1.47 | 0.52 | Truck Driver |
| 2001-04-24 | Nuisance dust, respirable, <1% Qtz | 0.28 | 10 | 0.03 | Front-end Loader Operator |
| 2001-04-24 | Respirable dust, <.1mg | 0 | Truck Driver | ||
| 2001-04-24 | Quartz, respirable, >1% Qtz | 0.12 | 1.04 | 0.12 | Front-end Loader Operator |
| 2001-04-24 | Respirable dust, <.1mg | 0 | Crusher Oper/Worker |
Boonsboro Quarry recorded 0.00 reportable injury cases per 100 full-time workers in 2023.
ⓘ
This rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.| Year | total case rate | days-away | fatal |
|---|---|---|---|
| 2023 * | 0.00 | 0.00 | 0.000 |
| 2018 * | 0.00 | 0.00 | 0.000 |
| 2013 * | 0.00 | 0.00 | 0.000 |
| 2011 * | 8.10 | 0.00 | 0.000 |
| 2010 * | 0.00 | 0.00 | 0.000 |
| 2009 * | 7.69 | 0.00 | 0.000 |
| 2008 * | 0.00 | 0.00 | 0.000 |
| 2007 * | 0.00 | 0.00 | 0.000 |
- Martin Marietta Aggregates 1950 to 2005
- Martin Marietta Materials, Inc 2005 to present
| Year | Employees |
|---|---|
| 2026 | 8 |
| 2025 | 9 |
| 2024 | 9 |
| 2023 | 11 |
| 2022 | 8 |
| 2021 | 9 |
| 2020 | 9 |
| 2019 | 9 |
| 2018 | 9 |
| 2017 | 9 |
| 2016 | 7 |
| 2015 | 6 |
| 2014 | 6 |
| 2013 | 9 |
| 2012 | 10 |
| 2011 | 13 |
| 2010 | 13 |
| 2009 | 14 |
| 2008 | 15 |
| 2007 | 15 |
| 2006 | 17 |
| 2005 | 16 |
| 2004 | 16 |
| 2003 | 17 |
| 2002 | 18 |
| 2001 | 18 |
| 2000 | 18 |
Boonsboro Quarry sits in Washington County, Maryland, where the Census mining category is 0.1% of county employment.
ⓘ
County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.ⓘ
Citations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2026 Q2 | 4,404 | 0 | 0 | 0.0 |
| 2026 Q1 | 4,358 | 0 | 0 | 0.0 |
| 2025 Q4 | 3,825 | 1 | 0 | 261.4 |
| 2025 Q3 | 3,610 | 0 | 0 | 0.0 |
| 2025 Q2 | 4,168 | 0 | 0 | 0.0 |
| 2025 Q1 | 4,700 | 0 | 0 | 0.0 |
| 2024 Q4 | 4,348 | 0 | 0 | 0.0 |
| 2024 Q3 | 3,625 | 0 | 0 | 0.0 |
Show 98 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2024 Q2 | 4,165 | 0 | 0 | 0.0 |
| 2024 Q1 | 4,594 | 0 | 0 | 0.0 |
| 2023 Q4 | 4,678 | 0 | 0 | 0.0 |
| 2023 Q3 | 5,490 | 0 | 0 | 0.0 |
| 2023 Q2 | 6,452 | 0 | 0 | 0.0 |
| 2023 Q1 | 5,076 | 0 | 0 | 0.0 |
| 2022 Q4 | 3,089 | 0 | 0 | 0.0 |
| 2022 Q3 | 1,540 | 0 | 0 | 0.0 |
| 2022 Q2 | 5,044 | 0 | 0 | 0.0 |
| 2022 Q1 | 4,268 | 0 | 0 | 0.0 |
| 2021 Q4 | 4,619 | 0 | 0 | 0.0 |
| 2021 Q3 | 2,227 | 0 | 0 | 0.0 |
| 2021 Q2 | 4,907 | 0 | 0 | 0.0 |
| 2021 Q1 | 4,764 | 0 | 0 | 0.0 |
| 2020 Q4 | 4,958 | 0 | 0 | 0.0 |
| 2020 Q3 | 2,348 | 0 | 0 | 0.0 |
| 2020 Q2 | 4,792 | 0 | 0 | 0.0 |
| 2020 Q1 | 5,216 | 0 | 0 | 0.0 |
| 2019 Q4 | 5,015 | 0 | 0 | 0.0 |
| 2019 Q3 | 5,125 | 0 | 0 | 0.0 |
| 2019 Q2 | 5,558 | 0 | 0 | 0.0 |
| 2019 Q1 | 4,211 | 0 | 0 | 0.0 |
| 2018 Q4 | 5,621 | 0 | 0 | 0.0 |
| 2018 Q3 | 5,513 | 0 | 0 | 0.0 |
| 2018 Q2 | 5,973 | 0 | 0 | 0.0 |
| 2018 Q1 | 3,921 | 0 | 0 | 0.0 |
| 2017 Q4 | 4,549 | 0 | 0 | 0.0 |
| 2017 Q3 | 5,301 | 0 | 0 | 0.0 |
| 2017 Q2 | 5,567 | 0 | 0 | 0.0 |
| 2017 Q1 | 4,415 | 0 | 0 | 0.0 |
| 2016 Q4 | 5,025 | 0 | 0 | 0.0 |
| 2016 Q3 | 6,105 | 0 | 0 | 0.0 |
| 2016 Q2 | 5,491 | 0 | 0 | 0.0 |
| 2016 Q1 | 3,072 | 0 | 0 | 0.0 |
| 2015 Q4 | 3,463 | 0 | 0 | 0.0 |
| 2015 Q3 | 4,551 | 0 | 0 | 0.0 |
| 2015 Q2 | 5,205 | 3 | 0 | 576.4 |
| 2015 Q1 | 1,561 | 0 | 0 | 0.0 |
| 2014 Q4 | 2,943 | 0 | 0 | 0.0 |
| 2014 Q3 | 4,664 | 0 | 0 | 0.0 |
| 2014 Q2 | 4,566 | 0 | 0 | 0.0 |
| 2014 Q1 | 1,381 | 0 | 0 | 0.0 |
| 2013 Q4 | 3,795 | 0 | 0 | 0.0 |
| 2013 Q3 | 5,239 | 0 | 0 | 0.0 |
| 2013 Q2 | 6,280 | 0 | 0 | 0.0 |
| 2013 Q1 | 5,824 | 1 | 0 | 171.7 |
| 2012 Q4 | 5,888 | 0 | 0 | 0.0 |
| 2012 Q3 | 5,118 | 0 | 0 | 0.0 |
| 2012 Q2 | 5,707 | 1 | 0 | 175.2 |
| 2012 Q1 | 1,976 | 0 | 0 | 0.0 |
| 2011 Q4 | 6,706 | 0 | 0 | 0.0 |
| 2011 Q3 | 7,070 | 0 | 0 | 0.0 |
| 2011 Q2 | 6,955 | 0 | 0 | 0.0 |
| 2011 Q1 | 3,951 | 9 | 0 | 2277.9 |
| 2010 Q4 | 5,858 | 0 | 0 | 0.0 |
| 2010 Q3 | 6,456 | 1 | 0 | 154.9 |
| 2010 Q2 | 6,570 | 0 | 0 | 0.0 |
| 2010 Q1 | 4,028 | 0 | 0 | 0.0 |
| 2009 Q4 | 6,666 | 1 | 0 | 150.0 |
| 2009 Q3 | 7,513 | 0 | 0 | 0.0 |
| 2009 Q2 | 7,496 | 3 | 3 | 400.2 |
| 2009 Q1 | 4,325 | 0 | 0 | 0.0 |
| 2008 Q4 | 6,631 | 3 | 0 | 452.4 |
| 2008 Q3 | 7,994 | 2 | 1 | 250.2 |
| 2008 Q2 | 8,258 | 0 | 0 | 0.0 |
| 2008 Q1 | 6,572 | 0 | 0 | 0.0 |
| 2007 Q4 | 7,658 | 1 | 0 | 130.6 |
| 2007 Q3 | 7,490 | 1 | 0 | 133.5 |
| 2007 Q2 | 7,949 | 1 | 0 | 125.8 |
| 2007 Q1 | 7,751 | 0 | 0 | 0.0 |
| 2006 Q4 | 9,544 | 0 | 0 | 0.0 |
| 2006 Q3 | 10,736 | 0 | 0 | 0.0 |
| 2006 Q2 | 10,449 | 2 | 0 | 191.4 |
| 2006 Q1 | 10,882 | 0 | 0 | 0.0 |
| 2005 Q4 | 10,772 | 1 | 0 | 92.8 |
| 2005 Q3 | 11,370 | 1 | 0 | 88.0 |
| 2005 Q2 | 11,100 | 0 | 0 | 0.0 |
| 2005 Q1 | 9,401 | 5 | 0 | 531.9 |
| 2004 Q4 | 9,971 | 0 | 0 | 0.0 |
| 2004 Q3 | 9,658 | 0 | 0 | 0.0 |
| 2004 Q2 | 10,597 | 0 | 0 | 0.0 |
| 2004 Q1 | 10,076 | 1 | 0 | 99.2 |
| 2003 Q4 | 9,410 | 0 | 0 | 0.0 |
| 2003 Q3 | 10,558 | 0 | 0 | 0.0 |
| 2003 Q2 | 8,919 | 2 | 0 | 224.2 |
| 2003 Q1 | 7,488 | 0 | 0 | 0.0 |
| 2002 Q4 | 8,971 | 2 | 0 | 222.9 |
| 2002 Q3 | 10,216 | 0 | 0 | 0.0 |
| 2002 Q2 | 12,949 | 2 | 0 | 154.5 |
| 2002 Q1 | 10,466 | 0 | 0 | 0.0 |
| 2001 Q4 | 11,612 | 1 | 0 | 86.1 |
| 2001 Q3 | 10,958 | 0 | 0 | 0.0 |
| 2001 Q2 | 11,508 | 1 | 0 | 86.9 |
| 2001 Q1 | 10,199 | 5 | 0 | 490.2 |
| 2000 Q4 | 12,408 | 0 | 0 | 0.0 |
| 2000 Q3 | 11,548 | 0 | 0 | 0.0 |
| 2000 Q2 | 11,552 | 4 | 1 | 346.3 |
| 2000 Q1 | 11,257 | 4 | 2 | 355.3 |
Reportable incidents
18 on file2024 · 1 incident
2023 · 1 incident
The employee was connecting a water hose to the drill to fill with water. Once connected, EE turned back and tripped over the hose that was laying on the ground causing EE to fall and dislocate left middle and index fingers.
2017 · 1 incident
An employee was installing pipe supports for a grizzly. The supports consisted of 8" schedule 160 steel 52" long. As employee was installing a support, they pinched their hand between the wall of a the crusher and pipe support causing a laceration require 12 sutures to close the wound.
2011 · 1 incident
Trying to lift hood on Mack truck and it caught and employee pulled second time and something popped in shoulder. R. shoulder/cervical strain plan - alternate ice & heat to area, take Naproxen (he already has a prescription) Robavin 750 mg & Ultram 50 mg. Follow up in one week - use sling provided - no use of R. arm.
2009 · 1 incident
EE was opening another EE's shoot for dust release, the other EE backed up too far and hit the clam gate on bottom of hopper & impact of clam knocked lever out of EE's hand and knocked him against beam to the ground, causing laceration to EE's left arm.
2006 · 1 incident
The employee was greasing an R-35 Euclid haul truck with power greaser. Attempted to grease a fitting on the truck when the grease line busted on end of greaser, causing the grease to enter his left hand pinky finger.
2004 · 1 incident
Employee was pounding anvils out of anvil ring with a sledge hammer. Another employee was standing about 25 feet away. While pounding the anvil a piece of metal from sledge hammer, head came off and hit the second employee in the upper left thigh.
2003 · 1 incident
EE WAS STANDING ON THE GROUND PULLING ON A 14" PIPE WRENCH WITH A 24" PIPE HANDLE. WRENCH SLIPPED FROM DOUBLE NUTS ON A STUD AND THE EE FELL ON HIS REAR END ON THE GROUND WITH HIS RIGHT FOOT U NDER HIM.
2000 · 3 incidents
EMPLOYEE WAS DISMOUNTING THE TRAM CAB OF INGERSOLL T-4 DRILL; HE SLIPPED ON THE FOOTSTEP AND STRAINED DIGITS OF THE RIGHT HAND THAT WAS HOLDING TO THE GRID IRON.
EMPLOYEE WAS MOVING A 55 GAL OF OIL WHEN HE STOOD THE BARREL UP HE FELT PAIN IN THE GROIN.
EE DROPPED A BAR USED TO HOLD OPEN AN INSPECTION DOOR OF #2 HAMMER MILL AND MASHED THE 3RD DIGIT OF HIS LEFT HAD. HE SUSTAINED A CONTUSION UNDER THE FINGERNAIL. EE WAS TAKEN TO DR. WHO DRAINED THE BLOOD FROM UNDER THE FINGERNAIL.
1996 · 1 incident
EMPLOYEE WAS PINNED BETWEEN A PICK-UP TRUCK AND WRECKER/HOIST TRUCK WHEN THE LATTER WAS STARTED. THE HOIST TRUCK GEAR WAS ENGAGED AND IT MOVED BACKWARDS AT A ANGLE PINNING THE EMPLOYEE CLOSE TO THE IMPACT POINT. INJURY SUSTAINED WAS A FRACTURE TO THE LEFT PELVIS.
1994 · 1 incident
A CUSTOMER SUFFERED A HEART ATTACH AND DIED AT THE MINE FOLLOWIN GMANUAL LOADIN GOF HIS PICKUP TRUCK WITH CRUSHED STONE.
1992 · 1 incident
EMPLOYEE WAS OPERATING A STOCKPILE HAUL TRUCK WHEN IT OVER TURNED IN A ROADWAY. THE EMPLOYEE APPARENTLY ROUNDED A CORNER EXCESSIVE SPEED.
1986 · 2 incidents
EMPLOYEE WAS ST9UCK BY A PIECE OF PIPE WHILE DISMANTLING A HOPPER.
EMPLOYEE S HAND3WAS STRUCK WITH A CABLE SLING WHILE DISMANTLING A HOPPER.
1984 · 1 incident
I.NAME WAS ATTEMPTING TO CHANGE PISTON IN A RAKE CALIBER WHEN IT FLEW OUT AND STUCK LEFT THUMB CAUSING LACERATION THAT REQUIRED STITCHES
1983 · 1 incident
EMPLOYEE ATTEMPTED TO ENGAGE A KNIFE BLADE DISCONNECT SWITCH WITH A WIRE BRUSH HANDLE THE BRUSH CONTACTED THE ENERGIZED COMPONENTS AND A FLASH EXPLOSION OCCURRED