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: 634 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Gilbertville Sand has $8K 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.
$8K
proposed penalties
$8K
current assessed
$8K
paid to date
$0
outstanding
65 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-04-29.
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
12
samples
1
limit-tested
Most sampled contaminants
Respirable dust, <.1mg10
Quartz, respirable, >1% Qtz2
Show the individual readings (12)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2025-10-21
Quartz, respirable, >1% Qtz
0.15
Front-end Loader Operator
2024-01-03
Respirable dust, <.1mg
0
Utility Man
2024-01-03
Respirable dust, <.1mg
0
Kiln/Dryer Operator
2023-09-27
Respirable dust, <.1mg
0
Front-end Loader Operator
2023-09-27
Respirable dust, <.1mg
0
Utility Man
2017-12-19
Quartz, respirable, >1% Qtz
0.27
1.9
0.14
Kiln/Dryer Operator
2016-10-25
Respirable dust, <.1mg
0
Kiln/Dryer Operator
2016-10-25
Respirable dust, <.1mg
0
Washer Operator
2016-10-25
Respirable dust, <.1mg
0
Dredge/Barge Operator
2013-05-09
Respirable dust, <.1mg
0
Front-end Loader Operator
2013-05-09
Respirable dust, <.1mg
0
Dredge/Barge Operator
2009-03-04
Respirable dust, <.1mg
0
Mechanic
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
9
2025
8
2024
8
2023
8
2022
8
2021
8
2020
8
2019
8
2018
8
2017
8
2016
8
2015
8
2014
7
2013
7
2012
7
2011
7
2010
7
2009
7
2008
7
2007
4
2006
4
2005
4
2004
4
2003
4
2002
3
2001
4
2000
3
Source: MSHA quarterly employment and production, updated weekly.
Gilbertville Sand sits in Black Hawk County, Iowa, 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.
Black Hawk County, Iowa · Population 130,693
0.1%
Mining share of county employment
$64,581
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
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2026 Q2
3,702
1
0
270.1
2026 Q1
3,841
0
0
0.0
2025 Q4
3,812
3
0
787.0
2025 Q3
3,224
0
0
0.0
2025 Q2
3,455
0
0
0.0
2025 Q1
2,609
0
0
0.0
2024 Q4
4,932
0
0
0.0
2024 Q3
3,922
0
0
0.0
Show 98 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
4,194
0
0
0.0
2024 Q1
3,663
0
0
0.0
2023 Q4
3,280
0
0
0.0
2023 Q3
3,402
0
0
0.0
2023 Q2
3,597
1
0
278.0
2023 Q1
3,832
2
0
521.9
2022 Q4
3,846
0
0
0.0
2022 Q3
3,374
2
0
592.8
2022 Q2
3,240
0
0
0.0
2022 Q1
3,335
0
0
0.0
2021 Q4
2,939
0
0
0.0
2021 Q3
3,153
0
0
0.0
2021 Q2
3,381
1
0
295.8
2021 Q1
3,359
0
0
0.0
2020 Q4
3,438
0
0
0.0
2020 Q3
3,257
0
0
0.0
2020 Q2
3,059
1
0
326.9
2020 Q1
3,089
2
0
647.5
2019 Q4
3,167
0
0
0.0
2019 Q3
3,135
2
0
638.0
2019 Q2
3,262
0
0
0.0
2019 Q1
3,262
0
0
0.0
2018 Q4
3,160
0
0
0.0
2018 Q3
3,376
1
0
296.2
2018 Q2
3,241
0
0
0.0
2018 Q1
3,055
0
0
0.0
2017 Q4
3,267
1
1
306.1
2017 Q3
2,849
0
0
0.0
2017 Q2
3,579
0
0
0.0
2017 Q1
3,093
0
0
0.0
2016 Q4
3,107
7
0
2253.0
2016 Q3
3,398
0
0
0.0
2016 Q2
3,451
0
0
0.0
2016 Q1
2,912
1
1
343.4
2015 Q4
2,958
0
0
0.0
2015 Q3
3,106
0
0
0.0
2015 Q2
3,755
0
0
0.0
2015 Q1
2,999
1
0
333.4
2014 Q4
3,436
0
0
0.0
2014 Q3
4,065
0
0
0.0
2014 Q2
3,707
1
0
269.8
2014 Q1
1,643
3
0
1825.9
2013 Q4
2,983
0
0
0.0
2013 Q3
2,901
0
0
0.0
2013 Q2
3,165
2
0
631.9
2013 Q1
2,788
0
0
0.0
2012 Q4
2,626
0
0
0.0
2012 Q3
2,901
0
0
0.0
2012 Q2
3,500
2
0
571.4
2012 Q1
2,495
3
1
1202.4
2011 Q4
2,476
0
0
0.0
2011 Q3
3,358
0
0
0.0
2011 Q2
2,590
5
1
1930.5
2011 Q1
2,740
0
0
0.0
2010 Q4
3,006
1
0
332.7
2010 Q3
3,017
4
0
1325.8
2010 Q2
3,349
0
0
0.0
2010 Q1
2,755
1
0
363.0
2009 Q4
2,701
0
0
0.0
2009 Q3
2,825
0
0
0.0
2009 Q2
3,191
3
0
940.1
2009 Q1
2,480
0
0
0.0
2008 Q4
3,308
0
0
0.0
2008 Q3
3,744
2
0
534.2
2008 Q2
3,520
0
0
0.0
2008 Q1
3,282
0
0
0.0
2007 Q4
2,090
0
0
0.0
2007 Q3
1,677
0
0
0.0
2007 Q2
2,004
0
0
0.0
2007 Q1
1,797
0
0
0.0
2006 Q4
1,558
0
0
0.0
2006 Q3
1,694
0
0
0.0
2006 Q2
1,836
0
0
0.0
2006 Q1
1,586
0
0
0.0
2005 Q4
1,684
0
0
0.0
2005 Q3
1,928
0
0
0.0
2005 Q2
2,144
0
0
0.0
2005 Q1
2,036
0
0
0.0
2004 Q4
2,067
0
0
0.0
2004 Q3
1,999
0
0
0.0
2004 Q2
2,041
4
0
1959.8
2004 Q1
1,345
0
0
0.0
2003 Q4
1,192
0
0
0.0
2003 Q3
2,032
0
0
0.0
2003 Q2
1,772
0
0
0.0
2003 Q1
1,298
0
0
0.0
2002 Q4
1,869
0
0
0.0
2002 Q3
1,473
1
0
678.9
2002 Q2
1,731
0
0
0.0
2002 Q1
1,209
0
0
0.0
2001 Q4
3,408
0
0
0.0
2001 Q3
3,916
0
0
0.0
2001 Q2
1,660
1
1
602.4
2001 Q1
1,272
0
0
0.0
2000 Q4
1,388
0
0
0.0
2000 Q3
1,410
0
0
0.0
2000 Q2
1,611
0
0
0.0
2000 Q1
882
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
14 on file
2023 · 2 incidents
April 28, 2023IA · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanSLIP OR FALL OF PERSON
Employee was exiting loader using proper 3-points of contact. Employee's foot slipped off last step of loader putting sudden stress on left arm and straining left shoulder.
April 4, 2023IA · Metal/Non-Metalwelder (non-shop)DISORDERS (REPEATED TRAUMA)
Audiologist report of 4/4/2023 on annual hearing test indicated a reportable hearing loss of 32.33 dB in the Left Ear. Employee is currently enrolled in BMC Aggregates Hearing Conservation Program and will be retrained on hearing conservation program and proper use of hearing protection.
Employee was working on dredge. While walking on land near dredge, employee tripped over cable used to anchor dredge. Employee fell, landing on left knee causing injury to knee.
Employee was using utility knife to cut rubber hose in order to install new fitting on end of hose. In process of cutting hose, utility knife slipped, causing laceration/puncture wound approximately 1" long on the inside of right thigh about 2"-4" above knee. Wound required 5 stitches.
2020 · 1 incident
September 23, 2020IA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
Employee was working on sand plant screen box. While performing maintenance employee fell through maintenance door used to access lower portion of screen box. During fall employee struck elbow on edge of opening and jammed shoulder.
2019 · 1 incident
September 16, 2019IA · Metal/Non-Metalbarge/boat/dredge/towbarge/towboat/leach operator, riverman, deck handHANDLING OF MATERIALS
Employee was working on a 5th wheel plate off of a non-mining piece of equipment (Over the road truck DOT). He was on his knees and turned to his left and pulled left back muscle.
2012 · 1 incident
February 14, 2012IA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSTRIKING OR BUMPING
Changing oil on final drive of backhoe. Noticed drain pan was getting full, stood up to get another drain pan. Walked around corner of backhoe and ran into open service on the backhoe. The result was a laceration to the bridge of nose that required stitches.
2010 · 1 incident
August 30, 2010IA · Metal/Non-Metalwelder (shop)MACHINERY
Was kneeling on knees pulling old belt out of bottom of leg #2 while the new belt was being pulled in above me. There was a piece of plywood that the new belt was laying on. When they pulled the new belt, the plywood slipped off of the beam it was resting on and hit him in the back of the head on his hard hat and snapped his head ahead.
2008 · 1 incident
May 27, 2008IA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorHANDLING OF MATERIALS
A crane was holding a dredge impeller in an upright position with a nylon strap tied around the impeller. The crane operator put slack in the cable. The victim had his hand between the strap and the impeller. When the slack was taken up, his hand was pinched and pulled his finger out from between the strap and impeller.
2005 · 1 incident
February 22, 2005IA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorMACHINERY