Mining Incidents

Sioux Falls Quarry Metal/Non-Metal

Controlled by Knife River Corporation
Minnehaha, Minnehaha County, SD  ·  Active
MSHA Mine ID: 3900008

Watch this mine

Email me when a new MSHA incident is filed at Sioux Falls Quarry.

Fatalities
0
Total incidents
45
Years on record
2002–2026
Latest incident
Jan 2026
Compliance record
MSHA citations since 2000
181
citations
30
significant & substantial
$30,991
proposed penalties
$30,991
paid to date
Source: MSHA violations data, updated weekly.
Quarterly safety rates
Citations per million employee-hours, as reported to MSHA
Quarter Hours worked Citations S&S Per 1M hrs
2025 Q4 20,316 0 0 0.0
2025 Q3 14,416 0 0 0.0
2025 Q1 18,176 0 0 0.0
2024 Q4 13,193 1 0 75.8
2024 Q2 14,129 3 0 212.3
2024 Q1 12,939 0 0 0.0
2023 Q4 12,445 1 0 80.4
2023 Q3 28,233 1 1 35.4
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No fatalities recorded at this mine.

Reportable incidents

45 on file

2026 · 1 incident

January 20, 2026 SD · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDTOOLS (NONPOWERED)
Knife River - South Dakota · Struck by flying object

Employee was assisting with the replacement of a head-drum shaft bearing on the #1 screen conveyor on the Portable Plant. The chain that was used to support the head-drum and shaft assembly snapped, striking Tyler Whipple middle finger on left hand, fracturing the 3rd digit / tip of finger.

2025 · 1 incident

August 18, 2025 SD · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDLING OF MATERIALS
Knife River - South Dakota · Over-exertion in lifting objects

Team members replacing return roller, shaft began to slip, team member grabbed the shaft, causing pain to the right wrist.

2024 · 1 incident

August 14, 2024 SD · Metal/Non-Metal drill operator HANDTOOLS (NONPOWERED)
Knife River - South Dakota · Struck by... (Not Elsewhere Classified)

Employee was attempting to remove the swivel adapter from the auger head. A 36-inch pipe wrench was attached to the adapter and while attempting to rotate the auger shaft, the auger shaft unexpectedly rotated with the pipe wrench attached. The pipe wrench struck EE in the right chest and pushed EE against the back of the drill truck.

2023 · 4 incidents

December 14, 2023 SD · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Knife River - South Dakota · Fall onto or against objects

EE was washing Tower #2 back pad, EE shut the fire hose off went to change locations & started to slip, falling backwards, but caught self with left hand on a pillar causing a strain to right neck & shoulder. Injury Type: Neck Strain. EE didn't request med. treatment at the time. Was seen by a medical provider on 12/26/23 when injury became reportable due to restrictions.

August 30, 2023 SD · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Knife River - South Dakota · Over-exertion in lifting objects

EE was lifting a return roller and handing it to a co-worker when EE twisted at the waist and strained back. (Lifting a Return Roller). Update: EE resigned, was not terminated by Knife River South Dakota.

July 14, 2023 SD · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator MACHINERY
Knife River - South Dakota · Struck by... (Not Elsewhere Classified)

EE was removing a worn cutting-edge bolt from the loader bucket. When EE went to remove the nut, the bolt dropped and continued to spin when EE attempted to secure it by grabbing it with EE's left hand, cutting EE's left index finger.

June 14, 2023 SD · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDTOOLS (NONPOWERED)
Knife River - South Dakota · Struck by flying object

EE was removing a worn bucket tooth on the 990H Loader. When the tooth failed to separate from the bucket adapter, EE used a sledgehammer to strike the tooth resulting a piece of shrapnel from the tooth striking EE in the chest and becoming imbedded.

2022 · 2 incidents

May 5, 2022 SD · Metal/Non-Metal water truck operator SLIP OR FALL OF PERSON
Knife River - South Dakota · Fall to the walkway or working surface

EE was pulling a 1 1/2 inch fire hose to clean off piece of equipment, as EE was walking backwards, tripped in rut and fell to ground.

January 13, 2022 SD · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Knife River - South Dakota · Struck by... (Not Elsewhere Classified)

Employee cutting belting for back flaps for feed ends of screen. Employee had the belting on the ground cutting, while on knees the utility knife slipped from the rubber, causing small laceration to inner left side of right knee.

2021 · 1 incident

October 18, 2021 SD · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver SLIP OR FALL OF PERSON
Knife River - South Dakota · Over-exertion (Not Elsewhere Classified)

Employee was climbing ladder onto haul truck, hands slipped, twisted left side back.

2020 · 3 incidents

June 12, 2020 SD · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator DISORDERS (PHYSICAL AGENTS)
Knife River - South Dakota · Contact with heat

The employee was using a water hose to wash out the material under tower 2. The employee complained of a headache and not feel well. (Heat Exhaustion)

May 26, 2020 SD · Metal/Non-Metal welder (non-shop) HANDLING OF MATERIALS
Knife River - South Dakota · Over-exertion in lifting objects

EE shoveling material to level the ground out to install stairs and platform to allow for storage of fueling tank.

March 4, 2020 SD · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Knife River - South Dakota · Fall from machine

EE dismounting loader ladder, boot tread got caught in the bottom rung of step, fell to the ground, striking left knee on concrete floor. EE fell on 3/4/20, reported to clinic on 3/5/20. On 3/16/20 EE given physical therapy.

2019 · 2 incidents

March 20, 2019 SD · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator SLIP OR FALL OF PERSON
Knife River - South Dakota · Fall from machine

Employee was exiting loader with ladder, right foot already on group, when left foot became caught on bottom step, causing employee to lose balance and fall to ground. Employee tried to catch self and fracturing left wrist.

February 21, 2019 SD · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Knife River - South Dakota · Struck by falling object

Employee changing oil, debris fell and landed in employee's right eye.

2018 · 5 incidents

November 5, 2018 SD · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Knife River - South Dakota · Caught in, under or between a moving and a stationary object

Window in loader was being closed, 5th fingertip slipped and was smashed between window and trim.

June 1, 2018 SD · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Knife River - South Dakota · Over-exertion in pulling or pushing objects

Employee pulling down on cable jack while in a man lift and felt a pull in right shoulder.

April 19, 2018 SD · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Knife River - South Dakota · Struck by flying object

Employee was washing material on the back pad under Tower 2 with a fire hose. Employee lost control of the fire hose and it hit them in the upper chest, below the collarbone. (Chest wall contusion) Employee did not advise the supervisor until 4/23/2018 that they requested medical treatment.

February 20, 2018 SD · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Knife River - South Dakota · Fall to the walkway or working surface

EE was walking to haul truck when EE slipped and fell on packed snow straining Rt. knee.

February 14, 2018 SD · Metal/Non-Metal welder (shop) HANDLING OF MATERIALS
Knife River - South Dakota · Over-exertion in lifting objects

Employee had completed cutting an H Beam on the band saw in the welding shop. EE picked up the cut off piece off the band saw that weighed 30 pounds and felt a pain in back.

2016 · 2 incidents

August 10, 2016 SD · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Knife River - South Dakota · Struck by... (Not Elsewhere Classified)

***1st day of treatment was 8/12/16****loading a shot, struck by a rock in the back.

June 6, 2016 SD · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Knife River - South Dakota · Over-exertion in lifting objects

EE was carrying a screen in Tower 2 to position it so that it could be installed in Screen 3. When EE picked up the screen EE felt a pain in right shoulder and bicep.(This incident was discussed with EE from the Denver Co. MSHA office on June 22, 2016 and directed to file an injury report due to the PT ordered by the Physician on 6/21/2016).

2015 · 4 incidents

December 18, 2015 SD · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Knife River - South Dakota · Caught in, under or between a moving and a stationary object

Personnel was loading scrape metal onto a flatbed trailer his glove caught a piece of slag and caused the metal to pinch his finger between the metal and the wooden side boards of the trailer.

December 3, 2015 SD · Metal/Non-Metal electrician helper HANDTOOLS (NONPOWERED)
Knife River - South Dakota · Struck by... (Not Elsewhere Classified)

Unwiring an electric motor and utility knife slipped when cutting tape and sliced through coveralls, jeans, and long johns to make lacerate inside of left thigh. A few stitches and no lost time.

March 28, 2015 SD · Metal/Non-Metal electrician, lineman HANDTOOLS (NONPOWERED)
Knife River - South Dakota · Struck by... (Not Elsewhere Classified)

Employee was cutting tape on wires to a motor and it was snow covered, wet, and slippery and the utility knife slipped causing it to cut through his gloves and lacerate the back side of his left thumb.

February 13, 2015 SD · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator SLIP OR FALL OF PERSON
Knife River - South Dakota · Fall onto or against objects

Employee was doing a pre-shift inspection on Loader unit #15-415. He was inspecting the z bar links, pins and bushings on the left front of the machine. He leaned over to inspect the machine, slipped on snow that had fallen the night before. He fell and his left side (upper chest) fracturing three ribs when he contacted the lift arms on the loader.

2013 · 1 incident

April 26, 2013 SD · Metal/Non-Metal prep plant foreman, supervisor, mill plant supervisor, kiln supervisor SLIP OR FALL OF PERSON
Knife River - South Dakota · Fall to the walkway or working surface

Employee was washing the HP 400 crusher decks off with a fire hose before scheduled crusher maintenance. He tripped on a small rock and fell to the crusher deck dislocating his left shoulder.

2012 · 1 incident

January 11, 2012 SD · Metal/Non-Metal ledgeman/hand, quarry man HANDTOOLS (NONPOWERED)
Knife River - South Dakota · Caught in, under or between a moving and a stationary object

EE was using a vise grip pliers to close the end of an s-hook from a hold down strap. The vise grip pliers slipped off of the s-hook and pinched his left middle finger.

2011 · 2 incidents

November 1, 2011 SD · Metal/Non-Metal pumper HANDTOOLS (NONPOWERED)
Knife River - South Dakota · Struck by... (Not Elsewhere Classified)

IE was changing screens in the middle deck of #4 screen with co-worker. Co-worker was swinging a 4 lb hammer to set the screen in the screen deck. IE inadvertently put his left hand next to the area that co-worker was swinging and IE's left middle finger was struck by the hammer.

August 16, 2011 SD · Metal/Non-Metal ledgeman/hand, quarry man DUST DISEASE OF LUNGS
Knife River - South Dakota · Inhalation of radiations, caustics, toxic and noxious substances

Exposure to Silica Dust / Silicosis

2009 · 3 incidents

May 4, 2009 SD · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Knife River - South Dakota · Fall to the walkway or working surface

Employee fell and strained his right knee while running to the break room to avoid getting wet when it began to rain.

February 11, 2009 SD · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Knife River - South Dakota · Fall to the walkway or working surface

While hoisting a 3'x20.5' sheet of corrugated metal siding, the sheet was caught by a gust of wind causing the clamps to fail. The 20#sheet fell to the ground from a height of approx. 10' striking injury. in his attempt to get out of the way he fell to the ground. He suffered a bruise to his abdomen. Slight damage to the sheeting/siding.

January 24, 2009 SD · Metal/Non-Metal FIRE
Knife River - South Dakota · Accident type, without injuries

The service vehicle was used for transportation to and from the field. The service truck was unoccupied and parked before the fire incident. At this time the cause of the vehicle fire is still under investigation but is believed to be electrical in nature.

2008 · 2 incidents

December 19, 2008 SD · Metal/Non-Metal FIRE
Knife River - South Dakota · Accident type, without injuries

Fire in an unoccupied structure: The fire is still under investigation, but it is believed to have been started by repairs associated with welding activities.

June 26, 2008 SD · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Knife River - South Dakota · Fall to the walkway or working surface

EE had finished washing out material from under the conveyor and was in the process of stowing the fire hose when he slipped backwards extended his L hand to caught himself and dislocating his left pinkie finger or pip joint. Note:EE was wearing his hard hat,safety glasses,high visibility garment,gloves & steel toed boots.

2007 · 1 incident

May 14, 2007 SD · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Knife River - South Dakota · Over-exertion (Not Elsewhere Classified)

The employee was climbing up a ladder to access the controls panel for stacker conv.The EE pulled his groin muscle when he was climbing ladder.

2006 · 1 incident

January 16, 2006 SD · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Knife River - South Dakota · Fall onto or against objects

EE was walking backwards while carrying screen on screening tower platform. He tripped on water line and landed on his right side on top of support beam. Employee had been working in same area and had made numerous trips.

2005 · 4 incidents

November 29, 2005 SD · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator SLIP OR FALL OF PERSON
Knife River - South Dakota · Fall to the walkway or working surface

Employee slipped and fell and dislocated his right pinkie finger.

September 9, 2005 SD · Metal/Non-Metal welder (shop) OTHER
Knife River - South Dakota · Struck by flying object

Wind was blowing approximately 30 mph - he was changing out the south HP crusher. Dust blew in face and right eye.

May 29, 2005 SD · Metal/Non-Metal assayer, geologist, metallurgist, engineer, engineer management HANDLING OF MATERIALS
Knife River - South Dakota · Over-exertion in lifting objects

Employee checks pumps on weekends. Cart tipped down into water while greasing pump. Tried to keep cart from falling into water while at the same time adding rock for weight to tongue to prevent it from falling into water.

May 11, 2005 SD · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Knife River - South Dakota · Over-exertion in pulling or pushing objects

WHILE ON THE INCLINED CATWALK BETWEEN #2 & #3 SCREENS, OPENING THE SPRAY BAR ON #3 SCREEN. AFTER OPENING 2 VALVES, STOOD UP TO MOVE TO ANOTHER SET OF VALVES. A SHARP PULL WAS FELT IN LOWER BACK.

2003 · 2 incidents

November 19, 2003 SD · Metal/Non-Metal welder (shop) MACHINERY
Knife River - South Dakota · Struck by flying object

EE WAS GRINDING ON A SCREEN/SPARKS WENT INTO FACE. EE WAS WEARING SAFETY GLASSES. DID NOT REPORT UNTIL FOLLOWING DAY. HAD IRRITATION IN THE EVENING. UNSUCCESSFULLY DID TRY TO REMOVE OBJECT-- COULD NOT-- WENT TO CLINIC.

October 26, 2003 SD · Metal/Non-Metal NO VALUE FOUND
Knife River - South Dakota · No Value Found

EE HAD STOPPED HIS TRUCK TO REMOVE A ROCK FROM THE HAUL ROAD. WHILE LIFTING THE ROCK FROM THE ROAD, HE STRAINED HIS BACK. HE WENT HOME AND THE NEXT MORNING HE COULD NOT GET OUT OF BED, AN AMBULANCE WAS CALLED TO BRING HIM TO HOSPITAL.

2002 · 2 incidents

October 1, 2002 SD · Metal/Non-Metal backhoe operator, trackhoe operator, crane operator HANDLING OF MATERIALS
Knife River - South Dakota · Over-exertion (Not Elsewhere Classified)

EE WAS CLIMBING THE LADDER ON THE LONGBELT STACKER TO MOVE IT, SPRAINED LEFT KNEE.

July 23, 2002 SD · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Knife River - South Dakota · Struck by... (Not Elsewhere Classified)

EE WAS GOING TO HELP CHANGE DRILL ROD. WHEN HE AND ANOTHER EE WERE LOADING ROD ON FLATBED TRUCK, ROD ROLLED TOWARD EE. EE THEN PUT HIS LEFT FOOT TOWARD ROD TO KEEP IT FROM ROLLING OFF TRUCK.