# Relationship history for MSHA mine 3609228

Current hierarchy: **Richard E  Luce → R Luce Flag & Field Stone → Rolling Acres #2**

- 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:** Richard E  Luce → Rolling Acres #2; 2004-03-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R Luce Flag & Field Stone → Rolling Acres #2; 2004-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard E  Luce → R Luce Flag & Field Stone; 2004-04-02 to current/open; source msha-controller-operator-history