# Relationship history for MSHA mine 1518881

Current hierarchy: **Greg  Damron → Cheyenne Enterprises Inc → #9**

- 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:** Cheyenne Enterprises Inc → #9; 2005-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Damron  et al → #9; 2005-05-26 to 2018-08-12; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Damron  et al → Cheyenne Enterprises Inc; 2005-05-26 to 2018-08-12; source msha-controller-operator-history
- **controller_controls_operator:** Henry  Chaney  et al → Cheyenne Enterprises Inc; 2005-05-26 to 2018-08-12; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Damron → #9; 2018-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Damron → Cheyenne Enterprises Inc; 2018-08-13 to current/open; source msha-controller-operator-history