# Relationship history for MSHA mine 1518336

Current hierarchy: **Ames  Caudill; Stephen T  Adams → Austin Coal Inc → Austin Coal Inc #1**

- 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:** Austin Coal Inc → Austin Coal Inc #1; 2001-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stephen T  Adams et al → Austin Coal Inc #1; 2001-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen T  Adams et al → Austin Coal Inc; 2001-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ames  Caudill et al → Austin Coal Inc; 2001-02-01 to current/open; source msha-controller-operator-history