Knife River - South Dakota safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Regular Safety and Health Inspection
Sioux Falls Quarry · 39000080.0 on-site hours reported
Exposure limits for airborne contaminants.
Sioux Falls Quarry · 390000830 CFR 56.5001(a)/56.5005 · Significant and substantial (S&S)
Exposure limits for airborne contaminants.
Sioux Falls Quarry · 390000830 CFR 56.5001(a)/56.5005 · Significant and substantial (S&S)
Exposure limits for airborne contaminants.
Sioux Falls Quarry · 390000830 CFR 56.5001(a)/56.5005 · Significant and substantial (S&S)
Handling of materials
Corson Sand Plant / Quarry · 3901478Days away from work only
Accident narrative
The employee was using a rake to level gravel prior to compacting and felt a muscle pull in EE's left tricep. EE didn't think it was much more than a strain, but the next morning EE still had some pain in the area.
Spot Inspection
Sioux Falls Quarry · 390000812.8 on-site hours reported
Regular Safety and Health Inspection
Knife River Portable Plant SD-1 · 39002925.3 on-site hours reported
Disorders (physical agents)
Corson Sand Plant / Quarry · 3901478Occupatnal illness not deg 1-6
Accident narrative
Employee setting concrete forms reported feeling ill after lunch. Supervisor suspected heat-related symptoms, placed employee in vehicle with cool air, provided water and electrolytes, and observed EE for the remainder of the shift. Symptoms returned that evening; employee went to the ER, was diagnosed with dehydration, and received treatment and observation.
Handling of materials
Corson Sand Plant / Quarry · 3901478Days away from work only
Accident narrative
Moving crane pad into position, individual strained their lower back.
Abandoned electric circuits.
Sioux Falls Quarry · 390000830 CFR 56.4011 · $151.00 proposed penalty
Identification of power switches.
Sioux Falls Quarry · 390000830 CFR 56.12018 · $151.00 proposed penalty
Electrical conductors.
Sioux Falls Quarry · 390000830 CFR 56.12004 · $151.00 proposed penalty
Protection for openings around travelways.
Sioux Falls Quarry · 390000830 CFR 56.11012 · $151.00 proposed penalty
Brakes.
Sioux Falls Quarry · 390000830 CFR 56.14101(a)(2) · $151.00 proposed penalty
Testing grounding systems.
Sioux Falls Quarry · 390000830 CFR 56.12028 · $151.00 proposed penalty
Identification of power switches.
Sioux Falls Quarry · 390000830 CFR 56.12018 · $177.00 proposed penalty
Electrical conductors.
Sioux Falls Quarry · 390000830 CFR 56.12004 · $151.00 proposed penalty
Access to stationary electrical equipment or switchgear.
Sioux Falls Quarry · 390000830 CFR 56.12019 · $151.00 proposed penalty
Operators stations.
Sioux Falls Quarry · 390000830 CFR 56.14103(b) · $151.00 proposed penalty
Inclined fixed ladders.
Sioux Falls Quarry · 390000830 CFR 56.11017 · $151.00 proposed penalty
Housekeeping.
Sioux Falls Quarry · 390000830 CFR 56.20003(a) · Significant and substantial (S&S) · $267.00 proposed penalty
Regular Safety and Health Inspection
Sioux Falls Quarry · 390000839.5 on-site hours reported
Compliance Follow-up Inspection
Corson Sand Plant / Quarry · 39014782.0 on-site hours reported
Protection for openings around travelways.
Corson Sand Plant / Quarry · 390147830 CFR 56.11012 · Significant and substantial (S&S) · $366.00 proposed penalty
Horns and backup alarms.
Corson Sand Plant / Quarry · 390147830 CFR 56.14132(a) · $151.00 proposed penalty
Sources and definitions
MSHA Violations (issue date), Accidents (accident date) and Inspections (begin date).
Violation titles use current CFR headings to identify the cited rule; they are not the inspector’s account of what happened.
Status is from the current MSHA Mines snapshot, not the selected reporting period. Closed records can retain their last reported controller/operator.
Counts describe published rows, including contractor records; accident records are not distinct incidents or numbers of people injured.
Zero means no matching records in the imported sources, not proof of no events. Historical coverage differs by source; absence before a source begins reporting is not a zero incident rate. Invalid or absent dates and records after the snapshot are excluded.
S&S means SIG_SUB=Y. Fatality records use DEGREE_INJURY_CD=01. Proposed penalties are not final assessed or paid amounts; missing dollar values are omitted.
Inspection hours are SUM_TOTAL_ON_SITE_HOURS attributed to the inspection start date, without supervisor/trainee hours. Missing hours are omitted; a started inspection may still be open.
Portfolio totals use current mine membership, including events before the current owner or operator's tenure.