# Relationship history for MSHA mine 4404460

Current hierarchy: **Ashby James M → 4-A Coal Corp → No 4**

- 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:** Darrell  Monk → No 4; 1976-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Shack Fork Coal Company Inc → No 4; 1977-01-01 to 1978-07-23; source msha-controller-operator-history
- **controller_controls_mine:** Salyers Arnold → No 4; 1977-01-01 to 1978-07-23; source msha-controller-operator-history
- **controller_controls_operator:** Salyers Arnold → Shack Fork Coal Company Inc; 1977-01-01 to 1978-07-23; source msha-controller-operator-history
- **operator_operates_mine:** Carrie Coal Company Inc → No 4; 1978-07-24 to 1980-02-18; source msha-controller-operator-history
- **controller_controls_operator:** Darrell  Monk → Carrie Coal Company Inc; 1978-07-24 to 1980-02-18; source msha-controller-operator-history
- **operator_operates_mine:** S & P Coal Company → No 4; 1980-02-19 to 1982-05-26; source msha-controller-operator-history
- **controller_controls_mine:** Stiltner Gratho L & Randall → No 4; 1980-02-19 to 1982-05-26; source msha-controller-operator-history
- **controller_controls_operator:** Stiltner Gratho L & Randall → S & P Coal Company; 1980-02-19 to 1982-05-26; source msha-controller-operator-history
- **controller_controls_mine:** Ashby James M Et Al → No 4; 1981-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** 4-A Coal Corp → No 4; 1982-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashby James M Et Al → 4-A Coal Corp; 1982-05-27 to current/open; source msha-controller-operator-history