# Relationship history for MSHA mine 4405061

Current hierarchy: **Lawson John & Truman → Little David Coal Company Inc → Pilot 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:** Fultz Kelly W → Pilot Mine; 1977-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ergoliv Coal Company Inc → Pilot Mine; 1978-06-01 to 1978-10-26; source msha-controller-operator-history
- **controller_controls_mine:** Taylor K D Ii → Pilot Mine; 1978-06-01 to 1978-10-26; source msha-controller-operator-history
- **controller_controls_operator:** Taylor K D Ii → Ergoliv Coal Company Inc; 1978-06-01 to 1978-10-26; source msha-controller-operator-history
- **operator_operates_mine:** Pilot Coal Corp → Pilot Mine; 1978-10-27 to 1980-07-21; source msha-controller-operator-history
- **controller_controls_operator:** Fultz Kelly W → Pilot Coal Corp; 1978-10-27 to 1980-07-21; source msha-controller-operator-history
- **operator_operates_mine:** Dry Fork Mining Company Inc → Pilot Mine; 1980-07-22 to 1981-07-15; source msha-controller-operator-history
- **controller_controls_mine:** Jones David C → Pilot Mine; 1980-07-22 to 1981-07-15; source msha-controller-operator-history
- **controller_controls_operator:** Jones David C → Dry Fork Mining Company Inc; 1980-07-22 to 1981-07-15; source msha-controller-operator-history
- **operator_operates_mine:** Little David Coal Company Inc → Pilot Mine; 1981-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lawson John & Truman → Pilot Mine; 1981-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawson John & Truman → Little David Coal Company Inc; 1981-07-16 to current/open; source msha-controller-operator-history