# Relationship history for MSHA mine 1102831

Current hierarchy: **Sarad John → Amco-Illinois Mining Company → Embarras No 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:** Energy Resource Development Inc → Embarras No 1; 1985-11-01 to 1988-07-20; source msha-controller-operator-history
- **controller_controls_mine:** Alan  Weed → Embarras No 1; 1985-11-01 to 1988-07-20; source msha-controller-operator-history
- **controller_controls_operator:** Alan  Weed → Energy Resource Development Inc; 1985-11-01 to 1988-07-20; source msha-controller-operator-history
- **operator_operates_mine:** Amco-Illinois Mining Company → Embarras No 1; 1988-07-21 to 1991-10-13; source msha-controller-operator-history
- **controller_controls_mine:** Sarad John → Embarras No 1; 1988-07-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sarad John → Amco-Illinois Mining Company; 1988-07-21 to 1991-10-13; source msha-controller-operator-history
- **operator_operates_mine:** Compliance Coal Inc → Embarras No 1; 1991-10-14 to 1993-01-07; source msha-controller-operator-history
- **controller_controls_mine:** Alan  Weed → Embarras No 1; 1991-10-14 to 1993-01-07; source msha-controller-operator-history
- **controller_controls_operator:** Alan  Weed → Compliance Coal Inc; 1991-10-14 to 1993-01-07; source msha-controller-operator-history
- **operator_operates_mine:** Amco-Illinois Mining Company → Embarras No 1; 1993-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sarad John → Amco-Illinois Mining Company; 1993-01-08 to current/open; source msha-controller-operator-history