# Relationship history for MSHA mine 4607043

Current hierarchy: **NSM PLC → Peres Processing Inc → No 1 Strip**

- 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:** Samara Coal Corp → No 1 Strip; 1985-12-01 to 1986-06-10; source msha-controller-operator-history
- **controller_controls_mine:** James B  Simpkins → No 1 Strip; 1985-12-01 to 1986-06-10; source msha-controller-operator-history
- **controller_controls_operator:** James B  Simpkins → Samara Coal Corp; 1985-12-01 to 1986-06-10; source msha-controller-operator-history
- **controller_controls_mine:** James B  Simpkins → No 1 Strip; 1986-02-01 to 1990-07-31; source msha-controller-operator-history
- **operator_operates_mine:** J W Mining Inc → No 1 Strip; 1986-06-11 to 1989-09-17; source msha-controller-operator-history
- **controller_controls_mine:** K Dale  Tolliver et al → No 1 Strip; 1986-06-11 to 1989-09-17; source msha-controller-operator-history
- **controller_controls_operator:** K Dale  Tolliver et al → J W Mining Inc; 1986-06-11 to 1989-09-17; source msha-controller-operator-history
- **operator_operates_mine:** Peres Processing Company Inc → No 1 Strip; 1989-09-18 to 1990-07-31; source msha-controller-operator-history
- **controller_controls_operator:** James B  Simpkins → Peres Processing Company Inc; 1989-09-18 to 1990-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Peres Processing Inc → No 1 Strip; 1990-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** NSM PLC → No 1 Strip; 1990-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** NSM PLC → Peres Processing Inc; 1990-08-01 to current/open; source msha-controller-operator-history