# Relationship history for MSHA mine 4002009

Current hierarchy: **De Voe Robert F → Meta Elkhorn Mining Company Inc → Tipple No 2**

- 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:** Management Investors & Norman Reid → Tipple No 2; 1974-12-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lewis Coal Company → Tipple No 2; 1976-01-01 to 1979-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Management Investors & Norman Reid → Lewis Coal Company; 1976-01-01 to 1979-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Kilby James → Tipple No 2; 1976-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Universal Coal Company → Tipple No 2; 1979-05-15 to 1980-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Hicks Ray Et Al → Tipple No 2; 1979-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hicks Ray Et Al → Universal Coal Company; 1979-05-15 to 1980-10-29; source msha-controller-operator-history
- **operator_operates_mine:** James Kilby Coal Company → Tipple No 2; 1980-10-30 to 1981-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Kilby James → James Kilby Coal Company; 1980-10-30 to 1981-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Petersville Sleigh Ltd Et Al → Tipple No 2; 1981-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chandler Coal Corp → Tipple No 2; 1981-05-01 to 1982-08-02; source msha-controller-operator-history
- **controller_controls_operator:** Petersville Sleigh Ltd Et Al → Chandler Coal Corp; 1981-05-01 to 1982-08-02; source msha-controller-operator-history
- **operator_operates_mine:** Meta Elkhorn Mining Company Inc → Tipple No 2; 1982-08-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** De Voe Robert F Et Al → Tipple No 2; 1982-08-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** De Voe Robert F Et Al → Meta Elkhorn Mining Company Inc; 1982-08-03 to current/open; source msha-controller-operator-history