# Relationship history for MSHA mine 1517419

Current hierarchy: **John G Liter → Liter's, Inc. → ROCK SPRINGS MINE**

- 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:** Liter's, Inc. → ROCK SPRINGS MINE; 1993-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert T  Liter et al → ROCK SPRINGS MINE; 1993-07-01 to 2025-01-08; source msha-controller-operator-history
- **controller_controls_operator:** Robert T  Liter et al → Liter's, Inc.; 1993-07-01 to 2025-01-08; source msha-controller-operator-history
- **controller_controls_mine:** John G Liter → ROCK SPRINGS MINE; 2025-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John G Liter → Liter's, Inc.; 2025-01-09 to current/open; source msha-controller-operator-history