# Relationship history for MSHA mine 1510807

Current hierarchy: **Needham Aubery K → C M N Fuels Inc → No 1 Surface**

- 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

- **operator_operates_mine:** C M N Fuels Inc → No 1 Surface; 1977-10-01 to 1979-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Needham Aubery K → No 1 Surface; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Needham Aubery K → C M N Fuels Inc; 1977-10-01 to 1979-07-29; source msha-controller-operator-history
- **operator_operates_mine:** C M N Fuel Inc → No 1 Surface; 1979-07-30 to 1980-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Absher Mable → No 1 Surface; 1979-07-30 to 1980-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Absher Mable → C M N Fuel Inc; 1979-07-30 to 1980-04-29; source msha-controller-operator-history
- **operator_operates_mine:** C M N Fuels Inc → No 1 Surface; 1980-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Needham Aubery K → C M N Fuels Inc; 1980-04-30 to current/open; source msha-controller-operator-history