ACTIVE / CONTROLLER PORTFOLIO

Riverstone Group

Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.

MSHA CONTROLLER IDM00233

MINE PORTFOLIO

27 of 27 mines and facilities

2025-01-01 – 2026-10-18. Active records; production reporting is not required.

MineLocation / typeCoal · short tonsHours workedViolationsAccident recordsOn-site inspection hours
ALLIED STONE PLANT #301100135 · Active6/8 quarters reportedRock Island, ILSurface · MSHA: Crushed, Broken Limestone NEC052,9113151.5
Antire Quarry (CS-72)2300026 · Active6/8 quarters reportedJefferson, MOSurface · MSHA: Crushed, Broken Limestone NEC0102,79710172.3
ANTONIA (CS56)2301957 · Active6/8 quarters reportedJefferson, MOSurface · MSHA: Crushed, Broken Limestone NEC033,8503041.5
Butler Hill Granite (CS58)2302431 · Active6/8 quarters reportedSt Francois, MOSurface · MSHA: Dimension Granite036,5721235.8
Central Stone Co (CS-75)1103083 · Active6/8 quarters reportedHancock, ILSurface · MSHA: Crushed, Broken Limestone NEC032,3601130.3
Central Stone Portable Pl#1 (CS48)2301102 · Active6/8 quarters reportedMarion, MOSurface · MSHA: Crushed, Broken Stone NEC022,8361224.3
Central Stone Port Pl #2 (CS49)2301065 · Active6/8 quarters reportedRalls, MOSurface · MSHA: Dimension Limestone035,6571036.0
CLEVELAND QUARRY PLANT #311100131 · Active6/8 quarters reportedHenry, ILSurface · MSHA: Crushed, Broken Limestone NEC051,3073158.8
EDINA PLANT (KC01)2300125 · Active6/8 quarters reportedKnox, MOSurface · MSHA: Crushed, Broken Limestone NEC052,9372028.0
Florence Plant (CS33)1100132 · Active6/8 quarters reportedPike, ILSurface · MSHA: Crushed, Broken Limestone NEC044,0601128.3
Fort Bellefontaine (CS31)2300745 · Active6/8 quarters reportedSt Louis, MOSurface · MSHA: Crushed, Broken Limestone NEC0154,76013897.5
House Springs Quarry (CS-73)2300106 · Active6/8 quarters reportedJefferson, MOSurface · MSHA: Crushed, Broken Limestone NEC022,4623025.5
JEFFERSON BARRACKS (CS-71)2300027 · Active6/8 quarters reportedSt Louis, MOSurface · MSHA: Crushed, Broken Limestone NEC0100,7495260.5
LaGrange Sand & Gravel Pit (CS61)2302494 · Active6/8 quarters reportedLewis, MOSurface · MSHA: Sand, Common020,1823140.0
Leclaire Portable Crusher #11301999 · Active6/8 quarters reportedScott, IASurface · MSHA: Crushed, Broken Limestone NEC019,2931035.3
Leclaire Portable Crusher #21302224 · Active6/8 quarters reportedScott, IASurface · MSHA: Crushed, Broken Limestone NEC020,7057241.3
Midway Stone #451100134 · Active6/8 quarters reportedRock Island, ILSurface · MSHA: Crushed, Broken Limestone NEC043,5533046.8
Moscow Mills Plant CS572302194 · Active6/8 quarters reportedLincoln, MOSurface · MSHA: Crushed, Broken Limestone NEC023,4645140.3
Otter Creek Sand & Gravel (CS-68)1101131 · Active6/8 quarters reportedFulton, ILSurface · MSHA: Construction Sand and Gravel015,8590014.0
Portable Plant #3 (CS50)1100124 · Active6/8 quarters reportedAdams, ILSurface · MSHA: Crushed, Broken Limestone NEC035,7371121.0
Potosi Plant #(CS66)2302423 · Active6/8 quarters reportedWashington, MOSurface · MSHA: Dimension Limestone029,7766061.0
RIVERSTONE PERMANENT WASH PLANT1300094 · Active6/8 quarters reportedScott, IASurface · MSHA: Crushed, Broken Limestone NEC010,3701112.0
ST Francois Quarry (CS54)2301628 · Active6/8 quarters reportedSt Francois, MOSurface · MSHA: Crushed, Broken Limestone NEC036,3166142.8
Trautman Quarry (CS-74)2300539 · Active6/8 quarters reportedJefferson, MOSurface · MSHA: Crushed, Broken Limestone NEC029,4482034.0
Troy Grove Stone Quarry (MC46)1102864 · Active6/8 quarters reportedLa Salle, ILSurface · MSHA: Crushed, Broken Limestone NEC045,6416140.0
VALLEY PLANT #71100136 · Active6/8 quarters reportedWarren, ILSurface · MSHA: Crushed, Broken Limestone NEC026,8582036.0
Vermilion Plant (MC47)1103208 · Active6/8 quarters reportedLa Salle, ILSurface · MSHA: Crushed, Broken Limestone NEC032,74719180.0

LOCATION

Portfolio map

27 of 27 mines with usable MSHA coordinates. Select a marker to open a mine.

Mine coordinates

2025-01-01 – 2026-10-18Applies to production, safety and portfolio metrics. Silica samples have separate filters.

Violations

109

8 significant & substantial (S&S)

  1. 2025 Q111
  2. 2025 Q212
  3. 2025 Q318
  4. 2025 Q431
  5. 2026 Q16
  6. 2026 Q214
  7. 2026 Q317
  8. 2026 Q4 *0

Accident records

28

1 records classified as fatality

  1. 2025 Q14
  2. 2025 Q23
  3. 2025 Q35
  4. 2025 Q42
  5. 2026 Q15
  6. 2026 Q25
  7. 2026 Q34
  8. 2026 Q4 *0

Proposed penalties · USD

17,381.00

102 of 109 violations with amounts

  1. 2025 Q12,938
  2. 2025 Q22,126
  3. 2025 Q32,732
  4. 2025 Q44,918
  5. 2026 Q1906
  6. 2026 Q22,100
  7. 2026 Q31,661
  8. 2026 Q4 *—

On-site inspection hours

1,134.25

118 inspections · 118 with hours

  1. 2025 Q180.75
  2. 2025 Q2166.75
  3. 2025 Q3177.00
  4. 2025 Q4252.75
  5. 2026 Q1144.00
  6. 2026 Q2146.25
  7. 2026 Q3166.75
  8. 2026 Q4 *—
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q11122,938.00401180.8
2025-Q21202,126.003017166.8
2025-Q31802,732.005022177.0
2025-Q43144,918.002018252.8
2026-Q160906.005019144.0
2026-Q21412,100.005115146.3
2026-Q31711,661.004016166.8
2026-Q4 *00—000—

Most cited CFR sections

All violations issued in the selected period. Counts combine subsections.

Safety activity

  1. accident220260910027
    Moscow Mills Plant CS57 · 2302194

    SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee alleges while stepping off of machine, left knee was strained.

  2. violation5118871
    ALLIED STONE PLANT #30 · 1100135

    56.11002 · $151.00 proposed

  3. violation5042308
    Central Stone Port Pl #2 (CS49) · 2301065

    56.14107(a) · $151.00 proposed

  4. inspectionF037BBD
    ALLIED STONE PLANT #30 · 1100135

    Regular Safety and Health Inspection · 11.5 on-site hours

  5. inspectionF038609
    Trautman Quarry (CS-74) · 2300539

    Compliance Follow-up Inspection · 1.5 on-site hours

  6. inspectionF02A0C6
    Central Stone Port Pl #2 (CS49) · 2301065

    Regular Safety and Health Inspection · 9.5 on-site hours

  7. inspectionF02EFD7
    Troy Grove Stone Quarry (MC46) · 1102864

    Regular Safety and Health Inspection · 4.0 on-site hours

  8. inspectionF025292
    CLEVELAND QUARRY PLANT #31 · 1100131

    103 (g) Written Notification Hazard Complaint Inspectio · 4.0 on-site hours

  9. violation5015064
    Florence Plant (CS33) · 1100132

    56.14100(b) · $151.00 proposed

  10. violation9788517
    EDINA PLANT (KC01) · 2300125

    56.14205 · $151.00 proposed

  11. inspectionF007B8B
    Florence Plant (CS33) · 1100132

    Regular Safety and Health Inspection · 10.5 on-site hours

  12. inspectionF0125A2
    EDINA PLANT (KC01) · 2300125

    Regular Safety and Health Inspection · 11.0 on-site hours

  13. inspectionF02A0BC
    Trautman Quarry (CS-74) · 2300539

    Compliance Follow-up Inspection · 2.5 on-site hours

  14. accident220260620005
    Fort Bellefontaine (CS31) · 2300745

    POWERED HAULAGE · DYS AWY FRM WRK & RESTRCTD ACT

    Accident narrative

    Employee alleges that after a rock was pulled out, another rock rolled and injured finger.

  15. inspectionF02A0B7
    House Springs Quarry (CS-73) · 2300106

    Regular Safety and Health Inspection · 3.0 on-site hours

  16. inspectionF025289
    VALLEY PLANT #7 · 1100136

    Regular Safety and Health Inspection · 10.8 on-site hours

  17. accident220260480014
    ALLIED STONE PLANT #30 · 1100135

    HANDTOOLS (NONPOWERED) · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee alleges that a wrench slipped from their hand and injured their foot.

  18. inspectionF023A7A
    Trautman Quarry (CS-74) · 2300539

    Regular Safety and Health Inspection · 10.5 on-site hours

  19. violation9788870
    Trautman Quarry (CS-74) · 2300539

    56.11001 · $151.00 proposed

  20. inspectionF023A76
    ANTONIA (CS56) · 2301957

    Regular Safety and Health Inspection · 7.5 on-site hours

  21. inspectionF00BE18
    Fort Bellefontaine (CS31) · 2300745

    Verbal Hazard Complaint Inspections · 6.0 on-site hours

  22. inspectionF023A75
    LaGrange Sand & Gravel Pit (CS61) · 2302494

    Regular Safety and Health Inspection · 7.0 on-site hours

  23. inspectionF01259C
    Antire Quarry (CS-72) · 2300026

    Verbal Hazard Complaint Inspections · 5.3 on-site hours

  24. accident220260200029
    Leclaire Portable Crusher #2 · 1302224

    HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    Employee alleges was in process of cleaning screens and fractured finger handling screen cleaning materials.

  25. inspectionF002B2F
    Potosi Plant #(CS66) · 2302423

    Compliance Follow-up Inspection · 5.3 on-site hours

Safety sources and definitions

MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-18.

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.

CFR headings link to the current Title 30 index; they are not historical legal determinations.

SELECTED PORTFOLIO

4 linked operators.

Relationships reflect the selected mine status and current MSHA controller/operator fields.