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: 138 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Ruby Mine has $10K 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.
$10K
proposed penalties
$10K
current assessed
$10K
paid to date
$0
outstanding
12 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2024-08-08.
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 controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
0
2025
5
2024
2
2023
2
2022
5
2020
8
1994
4
1993
9
1992
6
1991
7
1990
10
1989
8
Source: MSHA quarterly employment and production, updated weekly; years before 2000 come from MSHA's archived Part 50 employment files.
Ruby Mine sits in Yukon-Koyukuk Census Area, Alaska, where the Census mining category is 3.0% 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.
Yukon-Koyukuk Census Area, Alaska · Population 5,271
3.0%
Mining share of county employment
$52,642
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; earlier incidents are counted but not rate-adjusted, though reported hours reach back to 1983. 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 Q1
0
0
0
2025 Q4
0
0
0
2025 Q3
10,500
0
0
0.0
2025 Q2
1,800
0
0
0.0
2025 Q1
0
0
0
2024 Q4
0
0
0
2024 Q3
5,690
2
1
351.5
2024 Q2
0
0
0
Show 11 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q1
0
0
0
2023 Q4
0
0
0
2023 Q3
7,000
0
0
0.0
2023 Q2
0
0
0
2023 Q1
0
0
0
2022 Q4
0
0
0
2022 Q3
7,600
4
3
526.3
2022 Q2
9,720
0
0
0.0
2022 Q1
0
0
0
2020 Q3
6,915
5
1
723.1
2020 Q2
960
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
2 on file
1994 · 1 incident
October 2, 1994AK · Metal/Non-Metalledgeman/hand, quarry manPOWERED HAULAGE
INJURED WAS RIDING AS A PASSENGER IN OUT SEMI AND WE HIT AN ICY PATCH OF ROAD, THE DRIVER LOST CONTROL AND WENT OFF THE ROAD CAUSING THE OCCUPANTS TO BOUNCE AROUND THE CAB.
Show 1 earlier incidentsHide earlier incidents
1989 · 1 incident
June 11, 1989AK · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerSLIP OR FALL OF PERSON
I NAME WAS INSTALLING SUCTION HOSE ON 4IN PUMP SMALL BANK CAVED IN WHERE HE WAS STANDING HOSE FLEW UP & T HREADED FITTING HIT HIM IN THE MOUTH KNOCKING OU T 2 TEETH HE WAS FLOWN T O TOWN WHERE DENTIST PUT INTEMPORARY BRIDGE MISSED 6 DAYS OF WORK