# Relationship history for MSHA mine 3607855

Current hierarchy: **Carmeuse Holding SA → Global Stone Penroc LP → Roosevelt Avenue Operations**

- 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

- **controller_controls_mine:** Frederick L  Barton → Roosevelt Avenue Operations; 1986-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bestone Corp → Roosevelt Avenue Operations; 1987-01-01 to 1989-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Frederick L  Barton → Bestone Corp; 1987-01-01 to 1989-03-23; source msha-controller-operator-history
- **operator_operates_mine:** Delta Carbonate Inc → Roosevelt Avenue Operations; 1989-03-24 to 1995-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Gary A  Mahan  et al → Roosevelt Avenue Operations; 1989-03-24 to 1995-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Gary A  Mahan  et al → Delta Carbonate Inc; 1989-03-24 to 1995-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Global Stone Penroc Inc → Roosevelt Avenue Operations; 1995-06-29 to 1998-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Global Stone Corp → Roosevelt Avenue Operations; 1995-06-29 to 1998-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Global Stone Corp → Global Stone Penroc Inc; 1995-06-29 to 1998-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Global Stone Penroc LP → Roosevelt Avenue Operations; 1998-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Oglebay Norton Company → Roosevelt Avenue Operations; 1998-06-22 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_operator:** Oglebay Norton Company → Global Stone Penroc LP; 1998-06-22 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Roosevelt Avenue Operations; 2008-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Global Stone Penroc LP; 2008-02-13 to current/open; source msha-controller-operator-history