Portable Unit 4: 15 MSHA citations Metal/Non-Metal
Portable Unit 4 has $3K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.
Watch this mine
Email me when a new MSHA incident is filed at Portable Unit 4.
- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2005
15
citations
6
significant & substantial
$3,050
proposed penalties
$3,050
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2005
4
inspections on record
42
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: 42 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Portable Unit 4 has $3K 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.$3K
proposed penalties
$3K
current assessed
$3K
paid to date
$0
outstanding
15 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2007-04-24.
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.40.0%
significant & substantial
13.3%
high negligence or reckless
40.0%
reasonably likely or greater
60.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 0.0% low, 86.7% moderate, 13.3% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
Ownership history
- C J Bolton Inc 2005 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
| Year | Employees |
|---|---|
| 2008 | 3 |
| 2007 | 3 |
| 2006 | 3 |
| 2005 | 5 |
Source: MSHA quarterly employment and production, updated weekly.
Portable Unit 4 sits in Hillsborough County, New Hampshire, 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.Hillsborough County, New Hampshire · Population 424,732
0.0%
Mining share of county employment
$100,436
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 |
|---|---|---|---|---|
| 2008 Q3 | 308 | 0 | 0 | 0.0 |
| 2008 Q2 | 87 | 0 | 0 | 0.0 |
| 2008 Q1 | 231 | 0 | 0 | 0.0 |
| 2007 Q4 | 239 | 0 | 0 | 0.0 |
| 2007 Q3 | 120 | 0 | 0 | 0.0 |
| 2007 Q2 | 137 | 2 | 0 | 14598.5 |
| 2007 Q1 | 114 | 0 | 0 | 0.0 |
| 2006 Q4 | 262 | 0 | 0 | 0.0 |
Show 5 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2006 Q3 | 314 | 4 | 2 | 12738.9 |
| 2006 Q2 | 59 | 0 | 0 | 0.0 |
| 2006 Q1 | 240 | 0 | 0 | 0.0 |
| 2005 Q4 | 315 | 0 | 0 | 0.0 |
| 2005 Q3 | 2,358 | 9 | 4 | 3816.8 |
No reportable incidents on file.
MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.