# Relationship history for MSHA mine 4404552

Current hierarchy: **Blankenship Carter → Mighty Mite Coal Company Inc → No 2 Mine**

- 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:** Chaney J D → No 2 Mine; 1975-05-19 to 1981-03-11; source msha-controller-operator-history
- **operator_operates_mine:** Laurel Creek Coal Company Inc → No 2 Mine; 1976-11-01 to 1981-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Chaney J D → Laurel Creek Coal Company Inc; 1976-11-01 to 1981-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Smith Glen A → No 2 Mine; 1978-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tina Coal Company Inc → No 2 Mine; 1981-03-12 to 1989-01-03; source msha-controller-operator-history
- **controller_controls_mine:** James C  Ball → No 2 Mine; 1981-03-12 to 1989-01-03; source msha-controller-operator-history
- **controller_controls_operator:** James C  Ball → Tina Coal Company Inc; 1981-03-12 to 1989-01-03; source msha-controller-operator-history
- **operator_operates_mine:** Big Butt Mining Inc → No 2 Mine; 1989-01-04 to 1989-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Crouse Larry → No 2 Mine; 1989-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crouse Larry → Big Butt Mining Inc; 1989-01-04 to 1989-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Loose Jaw Coal Company No 4 Inc → No 2 Mine; 1989-06-15 to 1990-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Smith Glen A → Loose Jaw Coal Company No 4 Inc; 1989-06-15 to 1990-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Blankenship Carter → No 2 Mine; 1990-01-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mighty Mite Coal Company Inc → No 2 Mine; 1990-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blankenship Carter → Mighty Mite Coal Company Inc; 1990-08-01 to current/open; source msha-controller-operator-history