# Relationship history for MSHA mine 3605967

Current hierarchy: **Stiffler Albert F & Albert L → Pine Flats Coal Company Inc → C And C-Stiffler Ridge Job**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** J E Henry Coal Company → C And C-Stiffler Ridge Job; 1976-02-15 to 1976-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Henry J E → C And C-Stiffler Ridge Job; 1976-02-15 to 1976-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Henry J E → J E Henry Coal Company; 1976-02-15 to 1976-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Ronald Rutledge → C And C-Stiffler Ridge Job; 1976-10-01 to 1978-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Rutledge Ronald → C And C-Stiffler Ridge Job; 1976-10-01 to 1978-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Rutledge Ronald → Ronald Rutledge; 1976-10-01 to 1978-05-16; source msha-controller-operator-history
- **operator_operates_mine:** Pine Flats Coal Company Inc → C And C-Stiffler Ridge Job; 1978-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stiffler Albert F & Albert L → C And C-Stiffler Ridge Job; 1978-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stiffler Albert F & Albert L → Pine Flats Coal Company Inc; 1978-05-17 to current/open; source msha-controller-operator-history