# Relationship history for MSHA mine 1511969

Current hierarchy: **Donn A  Chickering → Branham & Baker Coal Company Inc → Action Energies**

- 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:** Donn A  Chickering → Action Energies; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Action Energies Inc → Action Energies; 1979-07-01 to 1983-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Petot William-Walter C Slone Et Al → Action Energies; 1979-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Petot William-Walter C Slone Et Al → Action Energies Inc; 1979-07-01 to 1983-12-14; source msha-controller-operator-history
- **operator_operates_mine:** Branham & Baker Coal Company Inc → Action Energies; 1983-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donn A  Chickering → Branham & Baker Coal Company Inc; 1983-12-15 to current/open; source msha-controller-operator-history