A mine employee was ascending the line 100 Rotex stairs, when employee's right foot got caught between the steps which caused employee to fall and strike mouth against a step. Injury resulted in four sutures and caused a chipped central incisor tooth.
Signal Peak Silica of Oakwood: 81 MSHA citations Metal/Non-Metal
Signal Peak Silica of Oakwood has $19K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.
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- Fatalities
- 0
- Total incidents
- 15
- Years on record
- 2018–2025
- Latest incident
- Mar 2025
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This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.Signal Peak Silica of Oakwood has $19K in proposed MSHA penalties and $0 outstanding across 0 contested dockets.
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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.ⓘ
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)
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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: 2025-09-03
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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.- Quartz, respirable, >1% Qtz42 over
- Respirable dust, <.1mg7
Show the individual readings (11)
| Date | Contaminant | Concentration | Limit | Conc / limit | Occupation |
|---|---|---|---|---|---|
| 2022-06-15 | Quartz, respirable, >1% Qtz | 0.4 | 0.4 | 1.00 | Utility Man |
| 2022-06-15 | Quartz, respirable, >1% Qtz | 0.45 | 0.38 | 1.18 | Utility Man |
| 2025-09-03 | Respirable dust, <.1mg | 0 | Utility Man | ||
| 2025-09-03 | Quartz, respirable, >1% Qtz | 0.16 | 0.57 | 0.28 | Dry Screen Plant Operator |
| 2025-09-03 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2025-09-03 | Respirable dust, <.1mg | 0 | Utility Man | ||
| 2022-06-15 | Respirable dust, <.1mg | 0 | Truck Loader | ||
| 2022-06-15 | Respirable dust, <.1mg | 0 | Truck Loader | ||
| 2019-04-04 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2019-04-04 | Quartz, respirable, >1% Qtz | 0.36 | Truck Loader | ||
| 2019-04-04 | Respirable dust, <.1mg | 0 | Mechanic |
Signal Peak Silica of Oakwood recorded 0.97 reportable injury cases per 100 full-time workers in 2025.
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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 |
|---|---|---|---|
| 2025 | 0.97 | 0.00 | 0.000 |
| 2024 | 1.33 | 0.00 | 0.000 |
| 2023 | 1.40 | 1.40 | 0.000 |
| 2022 | 3.12 | 0.00 | 0.000 |
| 2021 | 1.87 | 0.00 | 0.000 |
| 2020 * | 2.13 | 0.00 | 0.000 |
| 2019 | 1.34 | 0.00 | 0.000 |
- SP Silica of Oakwood, LLC 2018 to present
| Year | Employees |
|---|---|
| 2026 | 109 |
| 2025 | 94 |
| 2024 | 70 |
| 2023 | 66 |
| 2022 | 61 |
| 2021 | 47 |
| 2020 | 51 |
| 2019 | 143 |
| 2018 | 79 |
Signal Peak Silica of Oakwood sits in Dewey County, Oklahoma, where the Census mining category is 12.0% of county employment.
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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 | 59,826 | 3 | 0 | 50.1 |
| 2026 Q1 | 58,320 | 0 | 0 | 0.0 |
| 2025 Q4 | 62,031 | 4 | 0 | 64.5 |
| 2025 Q3 | 52,048 | 0 | 0 | 0.0 |
| 2025 Q2 | 47,294 | 5 | 0 | 105.7 |
| 2025 Q1 | 45,301 | 2 | 0 | 44.1 |
| 2024 Q4 | 39,034 | 0 | 0 | 0.0 |
| 2024 Q3 | 38,925 | 0 | 0 | 0.0 |
Show 25 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2024 Q2 | 35,620 | 3 | 0 | 84.2 |
| 2024 Q1 | 36,550 | 0 | 0 | 0.0 |
| 2023 Q4 | 37,176 | 2 | 0 | 53.8 |
| 2023 Q3 | 36,767 | 3 | 1 | 81.6 |
| 2023 Q2 | 35,087 | 0 | 0 | 0.0 |
| 2023 Q1 | 33,475 | 1 | 0 | 29.9 |
| 2022 Q4 | 30,948 | 0 | 0 | 0.0 |
| 2022 Q3 | 32,223 | 0 | 0 | 0.0 |
| 2022 Q2 | 32,357 | 3 | 2 | 92.7 |
| 2022 Q1 | 32,520 | 0 | 0 | 0.0 |
| 2021 Q4 | 34,826 | 0 | 0 | 0.0 |
| 2021 Q3 | 29,888 | 0 | 0 | 0.0 |
| 2021 Q2 | 24,698 | 0 | 0 | 0.0 |
| 2021 Q1 | 17,765 | 4 | 1 | 225.2 |
| 2020 Q4 | 9,915 | 0 | 0 | 0.0 |
| 2020 Q3 | 6,479 | 0 | 0 | 0.0 |
| 2020 Q2 | 24,339 | 0 | 0 | 0.0 |
| 2020 Q1 | 53,193 | 3 | 0 | 56.4 |
| 2019 Q4 | 67,632 | 0 | 0 | 0.0 |
| 2019 Q3 | 81,104 | 0 | 0 | 0.0 |
| 2019 Q2 | 77,171 | 13 | 3 | 168.5 |
| 2019 Q1 | 73,193 | 0 | 0 | 0.0 |
| 2018 Q4 | 81,609 | 2 | 0 | 24.5 |
| 2018 Q3 | 29,400 | 6 | 0 | 204.1 |
| 2018 Q2 | 6,335 | 0 | 0 | 0.0 |
Reportable incidents
15 on file2025 · 1 incident
2024 · 2 incidents
Dry Plant employee was conducting a walkaround when sand coming from the 3886 BC got into EE's right eye. The eye was flushed with water and saline, but the employee continued to feel irritation and requested further medical evaluation at the end of EE's shift. The employee was treated and released to work but was given a prescription for treatment.
EE cutting off Wire tie from Extension cord. Using incorrect tool (Pocket knife) slipped and cut left Pinky finger
2023 · 1 incident
Injured employee bent/knelt down to insert a bolt into a Rotex beam when they felt pain in thier left knee. Initial diagnosis was/is a sprained left knee, the employee was placed under work restrictions.
2022 · 2 incidents
The injured employee was using a Compact Utility Loader to clean up under a feed hopper conveyor belt when EE caught left index finger between the controls handle of the loader and belt structure causing a laceration that required 6 sutures.
The injured employee was standing in the maintenance shop when a grain of sand blew into left eye around employee's safety glasses. The employee flushed the eye several times. On December 17th the eye was still irritated, so employee went to the emergency room for further medical treatment. No object was found embedded, but was prescribed eye drops for treatment.
2021 · 1 incident
An employee was injured while descending the stairs from the rotex deck at the Dry Plant. EE was maintaining three points of contact but lost EE's balance towards the bottom of the steps causing EE to tighten EE's grip on the handrail injuring EE's right shoulder. The employee was diagnosed with a dislocated shoulder.
2020 · 1 incident
On 01/07/20 while descending the steps from the primary screener, the employee slipped and fell, striking lower back. Employee did not seek medical attention at the time. On 2/3 the employee sought medical attention for aggravation of this injury, and was placed on restricted work duty. Freezing rain that morning was a factor in this incident.
2019 · 2 incidents
Employee was closing a gate valve, at the head box of primary screen. While closing the valve, EE struck left elbow on the flange of the top rail of the head box, causing a laceration that required two sutures. Management was notified on 5-20-19 that the employee received sutures due to this incident.
Muck build up from waste belt under tail pulley. EE was hosing out from under the belt, foot became stuck in the muck, when ee pulled on leg to get out of the muck, and knee popped causing pain. EE wanted to have knee checked out. Was given immobilizer.
2018 · 5 incidents
Employee was walking, slipped on snow/icy steps of office.
An employee was working with a Southwire M6K Maxis to pull wire. The individual got the left little finger caught in the rope; the employee couldn't get finger out or shut the tool off in time, amputating the top of the employees' fifth digit.
Miner was cleaning/shoveling excess feed from the around the mobile rinser, loader operator placed material into hopper when a compacted segment slid from grizzly grid striking miner. Miner lost EE's balance / footing falling to the ground. During chain of events after being struck and coming to rest on the ground, miner sustained a fractured femur on EE's left leg.
Employee was aligning two pipe flanges using a Spud wrench. After spiking the bolt hole of one the flanges attempted to align the two flanges by pulling on the spud wrench. The spud wrench came out of the bolt hole striking the employee on the bridge of the nose.
Crane mechanic was working on the Link Belt Crane pulling the air cleaner. EE stepped back thinking EE was stepping onto the main deck from the catwalk. EE miss-stepped, missing the main deck and fell to the ground level. EE was not wearing fall protection.