# Relationship history for MSHA mine 4404035

Current hierarchy: **Hackney Frank W → Hackney Fuel Company Inc → No 5**

- 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:** Hackney Frank W → No 5; 1974-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Naomi Coal Company Inc → No 5; 1974-10-01 to 1977-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Nichols T H → No 5; 1974-10-01 to 1977-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Nichols T H → Naomi Coal Company Inc; 1974-10-01 to 1977-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Cedar Creek Coal Company → No 5; 1977-12-01 to 1979-07-04; source msha-controller-operator-history
- **controller_controls_mine:** Sparks Harry V → No 5; 1977-12-01 to 1980-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Sparks Harry V → Cedar Creek Coal Company; 1977-12-01 to 1979-07-04; source msha-controller-operator-history
- **operator_operates_mine:** Hackney Fuel Company Inc → No 5; 1979-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hackney Frank W → Hackney Fuel Company Inc; 1979-07-05 to current/open; source msha-controller-operator-history