# Relationship history for MSHA mine 1512498

Current hierarchy: **Elmer  Jent → Jent & Franks Coal Company Inc → No 6**

- 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:** Howell Corporation → No 6; 1977-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hurley Willie & Wilson Combs Jr → No 6; 1978-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Caudill Brothers Coal Company Inc → No 6; 1980-09-01 to 1984-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Caudill Forrester & Narce Et Al → No 6; 1980-09-01 to 1984-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Caudill Forrester & Narce Et Al → Caudill Brothers Coal Company Inc; 1980-09-01 to 1984-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Combs & Hurley Coal Company Inc → No 6; 1984-01-16 to 1984-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Hurley Willie & Wilson Combs Jr → Combs & Hurley Coal Company Inc; 1984-01-16 to 1984-06-18; source msha-controller-operator-history
- **operator_operates_mine:** Lake Coal Company Inc → No 6; 1984-06-19 to 1984-06-26; source msha-controller-operator-history
- **controller_controls_operator:** Howell Corporation → Lake Coal Company Inc; 1984-06-19 to 1984-06-26; source msha-controller-operator-history
- **operator_operates_mine:** Jent & Franks Coal Company Inc → No 6; 1984-06-27 to 1986-09-17; source msha-controller-operator-history
- **controller_controls_mine:** Elmer  Jent → No 6; 1984-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elmer  Jent → Jent & Franks Coal Company Inc; 1984-06-27 to 1986-09-17; source msha-controller-operator-history
- **controller_controls_mine:** Caudill Hubert W → No 6; 1986-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** First Class Coal Company Inc → No 6; 1986-09-18 to 1987-08-06; source msha-controller-operator-history
- **controller_controls_operator:** Caudill Hubert W → First Class Coal Company Inc; 1986-09-18 to 1987-08-06; source msha-controller-operator-history
- **operator_operates_mine:** Lake Coal Company Inc → No 6; 1987-08-07 to 1988-05-01; source msha-controller-operator-history
- **controller_controls_operator:** Howell Corporation → Lake Coal Company Inc; 1987-08-07 to 1988-05-01; source msha-controller-operator-history
- **operator_operates_mine:** Jent & Franks Coal Company Inc → No 6; 1988-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elmer  Jent → Jent & Franks Coal Company Inc; 1988-05-02 to current/open; source msha-controller-operator-history