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: 174 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
SOILS PLUS has $542 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.
$542
proposed penalties
$542
current assessed
$542
paid to date
$0
outstanding
4 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2023-09-14.
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: 2026-08-05
0%
of limit-tested samples over the exposure limit
4
samples
1
limit-tested
Most sampled contaminants
Respirable dust, <.1mg3
Nuisance dust, respirable, <1% Qtz1
Show the individual readings (4)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-08-05
Respirable dust, <.1mg
0
Cont. Miner Operator
2025-09-17
Respirable dust, <.1mg
0
Front-end Loader Operator
2022-05-05
Respirable dust, <.1mg
0
Bulldozer Operator
2022-05-05
Nuisance dust, respirable, <1% Qtz
1.17
10
0.12
Front-end Loader 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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
7
2025
9
2024
9
2023
9
2022
9
2004
2
2003
5
2002
3
2001
3
2000
3
Source: MSHA quarterly employment and production, updated weekly.
SOILS PLUS sits in Sonoma County, California, where the Census mining category is 0.0% 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.
Sonoma County, California · Population 485,642
0.0%
Mining share of county employment
$102,840
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
3,049
0
0
0.0
2026 Q1
2,654
0
0
0.0
2025 Q4
2,890
0
0
0.0
2025 Q3
3,031
0
0
0.0
2025 Q2
3,681
0
0
0.0
2025 Q1
3,129
0
0
0.0
2024 Q4
3,098
0
0
0.0
2024 Q3
3,893
0
0
0.0
Show 29 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
3,583
0
0
0.0
2024 Q1
3,116
0
0
0.0
2023 Q4
3,594
0
0
0.0
2023 Q3
4,494
1
0
222.5
2023 Q2
4,163
0
0
0.0
2023 Q1
3,574
0
0
0.0
2022 Q4
3,475
0
0
0.0
2022 Q3
3,040
0
0
0.0
2022 Q2
4,176
3
0
718.4
2004 Q4
113
0
0
0.0
2004 Q3
899
0
0
0.0
2004 Q2
252
0
0
0.0
2004 Q1
0
0
0
2003 Q4
6,060
0
0
0.0
2003 Q3
1,343
0
0
0.0
2003 Q2
219
0
0
0.0
2003 Q1
182
0
0
0.0
2002 Q4
468
0
0
0.0
2002 Q3
1,332
0
0
0.0
2002 Q2
335
0
0
0.0
2002 Q1
733
0
0
0.0
2001 Q4
286
0
0
0.0
2001 Q3
13
0
0
0.0
2001 Q2
97
0
0
0.0
2001 Q1
104
0
0
0.0
2000 Q4
18
0
0
0.0
2000 Q3
90
0
0
0.0
2000 Q2
357
0
0
0.0
2000 Q1
888
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
7 on file
2023 · 1 incident
June 6, 2023CA · Metal/Non-Metalclerk, timekeeper, office worker, director of salesSLIP OR FALL OF PERSON
The employee is an office employee, not a miner. EE was moving a small concrete statue that was dropped off by a customer for recycling in the parking lot area. The employee walked up to the area in the parking lot to place the statue and as EE walked away, EE's foot slid and EE rolled EE's left ankle.
2022 · 1 incident
October 6, 2022CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDTOOLS (NONPOWERED)
Employee was trying to loosen a 3-inch coupler. They pulled the pipe wrench and put their whole body into it. As they pulled down and it started to loosen, they felt a muscle pull on the right side of lower back.
1995 · 1 incident
June 12, 1995CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerSLIP OR FALL OF PERSON
EMPLOYEE WAS CLEANING MUD OFF A ROUND ROLLER WHENTAHE TOOL BEING USED CAUGHT THE ROLLER, SPUN AROUND, AND STRUCK HIM IN THE RIGHT CHEAST, LACERATING IT.
1993 · 2 incidents
May 20, 1993CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDLING OF MATERIALS
INJURED EMPLOYEE WAS TRYING TO GET STEEL OUT OF THE GROUND, WHEN A ROCK FELL FROM ABOVE ONTO HIS RIGHT FOOT. NO SKIN WAS BROKEN, NO BLOOD SHED, NO BROKEN BONES AS OF 5/24/93. EMPLOYEE WAS IN S EVERE PAIN AND FOOT BADLY BRUISED. WILL BE CHECKED AGAIN FOR BROKEN BONES IN 1 WEEK.
March 23, 1993CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDTOOLS (NONPOWERED)
INJURED EMPLOYEE WAS HOLDING A BOLT WITH HIS HAND AGAINST THE PIN TO BE REMOVED. WHEN THE PIN WAS KNOCKED OUT WITH A HAMMER, THE BOLT WENT INTO A HOLE AND SHIFTED, PINCHING THE LEFT THUMB BETW EEN CONVEYOR FRAME AND BOLT. NO SKIN WAS BROKEN, NO BLOOD SHED, NO BROKEN BONES.