# Relationship history for MSHA mine 2002777

Current hierarchy: **William G  Forrest → Forrest Aggregate → Forrest Aggregate**

- 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:** U S Aggregate Corp → Forrest Aggregate; 1987-06-01 to 1991-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Gordon A  Snowden → Forrest Aggregate; 1987-06-01 to 1991-06-27; source msha-controller-operator-history
- **controller_controls_operator:** Gordon A  Snowden → U S Aggregate Corp; 1987-06-01 to 1991-06-27; source msha-controller-operator-history
- **operator_operates_mine:** U S Aggregate Corp → Forrest Aggregate; 1991-06-28 to 1995-09-06; source msha-controller-operator-history
- **controller_controls_mine:** Billie  Andison et al → Forrest Aggregate; 1991-06-28 to 1995-09-06; source msha-controller-operator-history
- **controller_controls_operator:** Billie  Andison et al → U S Aggregate Corp; 1991-06-28 to 1995-09-06; source msha-controller-operator-history
- **operator_operates_mine:** B & A Aggregates → Forrest Aggregate; 1995-09-07 to 2003-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Elaine  Andison → Forrest Aggregate; 1995-09-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elaine  Andison → B & A Aggregates; 1995-09-07 to 2003-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Forrest Aggregate → Forrest Aggregate; 2003-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William G  Forrest → Forrest Aggregate; 2003-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William G  Forrest → Forrest Aggregate; 2003-06-10 to current/open; source msha-controller-operator-history