North Tisdale Shaft No 1 has $708 in proposed MSHA penalties and $60 outstanding across 0 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
4
Years on record
1988–1990
Latest incident
Jul 1990
Compliance record
MSHA citations since 2001
11
citations
1
significant & substantial
$708
proposed penalties
$648
paid to date
92% of proposed penalties paid to date, a $60 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2001
25
inspections on record
409
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: 409 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
North Tisdale Shaft No 1 has $708 in proposed MSHA penalties and $60 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.
$708
proposed penalties
$708
current assessed
$648
paid to date
$60
outstanding
11 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2007-02-06.
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: 2006-03-15, 20 years ago
3
samples
0
limit-tested
Most sampled contaminants
Respirable dust, <.1mg3
Show the individual readings (3)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2006-03-15
Respirable dust, <.1mg
0
Utility Man
2006-03-15
Respirable dust, <.1mg
0
Hoist Operator
2006-03-15
Respirable dust, <.1mg
0
Utility Man
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
2007
4
2006
7
2005
6
2004
5
2003
4
2002
3
2001
2
2000
3
Source: MSHA quarterly employment and production, updated weekly.
North Tisdale Shaft No 1 sits in Johnson County, Wyoming, where the Census mining category is 3.5% 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.
Johnson County, Wyoming · Population 8,602
3.5%
Mining share of county employment
$63,905
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
2007 Q4
142
0
0
0.0
2007 Q3
124
0
0
0.0
2007 Q2
509
0
0
0.0
2007 Q1
496
1
0
2016.1
2006 Q4
890
0
0
0.0
2006 Q3
1,460
0
0
0.0
2006 Q2
1,296
0
0
0.0
2006 Q1
1,581
0
0
0.0
Show 21 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2005 Q4
1,368
0
0
0.0
2005 Q3
1,733
0
0
0.0
2005 Q2
1,715
1
0
583.1
2005 Q1
1,283
0
0
0.0
2004 Q4
1,585
1
0
630.9
2004 Q3
1,950
3
0
1538.5
2004 Q2
609
3
0
4926.1
2004 Q1
648
0
0
0.0
2003 Q4
773
0
0
0.0
2003 Q3
1,115
0
0
0.0
2003 Q2
566
0
0
0.0
2003 Q1
557
0
0
0.0
2002 Q4
566
0
0
0.0
2002 Q3
1,370
0
0
0.0
2002 Q2
729
0
0
0.0
2002 Q1
547
0
0
0.0
2001 Q4
571
0
0
0.0
2001 Q3
457
1
0
2188.2
2001 Q2
772
0
0
0.0
2001 Q1
1,555
1
1
643.1
2000 Q4
1,234
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
4 on file
1990 · 1 incident
July 2, 1990WY · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDTOOLS (NONPOWERED)
EMPLOYEE WAS TRYING TO BREAK PIPE FITTINGS APART USING A PIPE WRENCH AND CHEATER BAR IN A PIPE VISE. THE PIPE BROKE AND THE CHEATER BAR HIT LEFT HAND AND WRIST. CAUSED STRESSED TENDON IN LEFT WRIST.
THERE WAS AN EXPLOSION IN THE VERTICAL SHAFT FROM HYDRO CARBON BLDG THE IGNITION SOURCE IS UNKNOWN. THE EXPLOSION FOR4CED THE MAN CAGE, WHICH WAS PARKED ABOUT 10 FT BELOW THE SHAFT DOORS, TO B REAK THROUGH THE DOORS AND UP THRU THE TOP OF THE HEADRAME. THE MAN CAGE LANDED ON THE ROOF OF THE HOIST HOUSE. WITHOUT THE HOIST CAN NOT GET UNDERGROUND TO INVESTIGATE.
WHILE WELDING PIPE AT SHAFT COLLAR SOME SPARKS ACCIDENTLY IGNITED RAG USED AS FIL MATERIAL IN END OF PIPE. RAG THEN FELL DOWN TO BOTTOM & IGNITED CRUDE OIL. DAMAGE FROM WAER PUT INTO SHAFT TO PUT FIRE OUT TO EQUIPMENT & SOME LOSS OF PRODUCTION.