# Relationship history for MSHA mine 3304236

Current hierarchy: **Bontempo Drema → Jamie Mining Company → Jamie Mine**

- 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:** Jamie Mining Company → Jamie Mine; 1991-06-01 to 1992-01-08; source msha-controller-operator-history
- **controller_controls_mine:** Morta Ralph Della → Jamie Mine; 1991-06-01 to 1992-01-08; source msha-controller-operator-history
- **controller_controls_operator:** Morta Ralph Della → Jamie Mining Company; 1991-06-01 to 1992-01-08; source msha-controller-operator-history
- **operator_operates_mine:** Jamie Mining Company → Jamie Mine; 1992-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bontempo Drema → Jamie Mine; 1992-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bontempo Drema → Jamie Mining Company; 1992-01-09 to current/open; source msha-controller-operator-history