Rock Force 1 has $54K 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
1
Years on record
2015
Latest incident
Apr 2015
Compliance record
MSHA citations since 2000
146
citations
28
significant & substantial
$53,649
proposed penalties
$53,649
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
52
inspections on record
563
inspection hours
n/a
citations per 100 inspection hours
ⓘThis rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.
Rate withheld: 563 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Rock Force 1 has $54K in proposed MSHA penalties and $0 outstanding across 0 contested dockets.
Penalty disposition
ⓘDifferences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$54K
proposed penalties
$54K
current assessed
$54K
paid to date
$0
outstanding
144 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-06-11.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Violation severity profile
ⓘShares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.
Source: MSHA violations gravity and negligence coding, updated weekly.
Health sampling
ⓘ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: 2025-10-21
0%
of limit-tested samples over the exposure limit
16
samples
6
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz10
Respirable dust, <.1mg5
Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (16)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-10-21
Respirable dust, <.1mg
0
Front-end Loader Operator
2025-10-21
Respirable dust, <.1mg
0
Bulldozer Operator
2025-10-21
Quartz, respirable, >1% Qtz
0.18
Laborer, Bullgang
2019-01-23
Quartz, respirable, >1% Qtz
0.28
Front-end Loader Operator
2019-01-23
Quartz, respirable, >1% Qtz
0.62
Laborer, Bullgang
2019-01-23
Quartz, respirable, >1% Qtz
0.14
Bulldozer Operator
2014-03-26
Quartz, respirable, >1% Qtz
0.31
0.65
0.48
Bulldozer Operator
2014-03-26
Quartz, respirable, >1% Qtz
0.34
0.63
0.54
Crusher Oper/Worker
2014-03-26
Unlisted Particulate, respirable, <1% Qtz
0.23
Front-end Loader Operator
2009-11-24
Quartz, respirable, >1% Qtz
0.24
0.84
0.29
Front-end Loader Operator
2005-11-10
Respirable dust, <.1mg
0
Bulldozer Operator
2005-11-10
Quartz, respirable, >1% Qtz
0.16
0.87
0.18
Crusher Oper/Worker
2005-11-10
Respirable dust, <.1mg
0
Front-end Loader Operator
2003-11-05
Quartz, respirable, >1% Qtz
0.3
0.65
0.46
Crusher Oper/Worker
2003-11-05
Respirable dust, <.1mg
0
Front-end Loader Operator
2003-11-05
Quartz, respirable, >1% Qtz
0.31
0.86
0.36
Bulldozer Operator
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly. Metal/nonmetal contaminant figures come from MSHA's Personal Health Samples and Area Samples files (public record), updated weekly.
Rock Force 1 recorded 0.00 reportable injury cases per 100 full-time workers in 2024.
Injury rate, 2024
ⓘ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.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
No reportable injury cases in any year shown. Employee-hours were reported in each of those years, so these are true zeros rather than missing data. Citations, listed in the compliance record above, are inspector-found violations and are counted separately from worker injuries.
Below average. The US metal and nonmetal mining average was 1.77 and the all-US-mining average was 2.08 cases per 100 workers.
In Idaho, metal and nonmetal mining averaged 2.71 cases per 100 workers that year.
Under 100,000 employee-hours were reported that year, so a single case moves the rate by two or more. Read the figure as approximate.
Year
total case rate
days-away
fatal
2024 *
0.00
0.00
0.000
2023 *
0.00
0.00
0.000
2022 *
0.00
0.00
0.000
2021 *
0.00
0.00
0.000
2020 *
0.00
0.00
0.000
2019 *
0.00
0.00
0.000
2018 *
0.00
0.00
0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Ownership history
Ada Sand & Gravel & Construction Company1986 to 1989
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
12
2025
8
2024
15
2023
11
2022
11
2021
10
2020
10
2019
12
2018
10
2017
9
2016
9
2015
9
2014
8
2013
11
2012
9
2011
7
2010
6
2009
7
2008
7
2007
10
2006
8
2005
7
2004
8
2003
8
2002
5
2001
6
2000
5
Source: MSHA quarterly employment and production, updated weekly.
Rock Force 1 sits in Ada County, Idaho, where the Census mining category is 0.1% of county employment.
Local economic context
ⓘ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.
Ada County, Idaho · Population 508,052
0.1%
Mining share of county employment
$88,907
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
Quarterly safety rates
ⓘ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.
Citations per million employee-hours, as reported to MSHA
Truck driver returning with haul-off dirt from a job site, proceeded to the upper dump site and stalled engine near the top. Driver failed to administer the brakes while attempting to restart and rolled backwards until loosing control striking right side berm causing truck to roll onto driver side. 25ft.roadway was clear of debris. Existing berms exceeded minimum requirements.