# Relationship history for MSHA mine 4607652

Current hierarchy: **Jack L  Williams → Williams Construction Company → Otter Creek Surface**

- 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:** Anderson Arthur L → Otter Creek Surface; 1976-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Triple A Coals Inc → Otter Creek Surface; 1989-01-01 to 1991-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Anderson Arthur L → Triple A Coals Inc; 1989-01-01 to 1991-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Browning Leon → Otter Creek Surface; 1989-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jack L  Williams → Otter Creek Surface; 1990-12-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fenton Mining Corp → Otter Creek Surface; 1991-05-30 to 1992-01-05; source msha-controller-operator-history
- **controller_controls_operator:** Browning Leon → Fenton Mining Corp; 1991-05-30 to 1992-01-05; source msha-controller-operator-history
- **operator_operates_mine:** Williams Construction Company → Otter Creek Surface; 1992-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack L  Williams → Williams Construction Company; 1992-01-06 to current/open; source msha-controller-operator-history