# Relationship history for MSHA mine 0102704

Current hierarchy: **Frye Troy → T & S Trucking → JEMISON**

- 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:** Jenkins Brick Company → JEMISON; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jenkins Brick Company → JEMISON; 1986-10-01 to 1988-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Jenkins Brick Company → Jenkins Brick Company; 1986-10-01 to 1988-03-31; source msha-controller-operator-history
- **operator_operates_mine:** T & S Trucking → JEMISON; 1988-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frye Troy → JEMISON; 1988-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frye Troy → T & S Trucking; 1988-04-01 to current/open; source msha-controller-operator-history