# Relationship history for MSHA mine 1500062

Current hierarchy: **Carmeuse Holding SA → Carmeuse Lime and Stone Inc → Underground Black River Operation**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Black River Lime Company → Underground Black River Operation; 1950-01-01 to 1986-05-21; source msha-controller-operator-history
- **controller_controls_mine:** LTV Corp → Underground Black River Operation; 1950-01-01 to 1986-05-21; source msha-controller-operator-history
- **controller_controls_operator:** LTV Corp → Black River Lime Company; 1950-01-01 to 1986-05-21; source msha-controller-operator-history
- **controller_controls_mine:** Dravo Corp → Underground Black River Operation; 1950-01-01 to 1998-11-24; source msha-controller-operator-history
- **operator_operates_mine:** Dravo Lime Company → Underground Black River Operation; 1986-05-22 to 1998-10-25; source msha-controller-operator-history
- **controller_controls_operator:** Dravo Corp → Dravo Lime Company; 1986-05-22 to 1998-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Underground Black River Operation; 1997-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dravo Lime Inc → Underground Black River Operation; 1998-10-26 to 2002-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Underground Black River Operation; 1998-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Dravo Lime Inc; 1998-10-26 to 2002-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge SA → Dravo Lime Inc; 1998-10-26 to 2002-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Underground Black River Operation; 2002-06-20 to 2015-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Carmeuse Lime → Underground Black River Operation; 2002-07-01 to 2003-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Carmeuse Lime; 2002-07-01 to 2003-03-16; source msha-controller-operator-history
- **operator_operates_mine:** Carmeuse Lime and Stone Inc → Underground Black River Operation; 2003-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Carmeuse Lime and Stone Inc; 2003-03-17 to 2015-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge SA → Carmeuse Lime and Stone Inc; 2003-03-17 to 2015-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Underground Black River Operation; 2015-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Carmeuse Lime and Stone Inc; 2015-07-15 to current/open; source msha-controller-operator-history