# Relationship history for MSHA mine 1700309

Current hierarchy: **Brandi B  Folsom; Jason O  Folsom → Owen J Folsom Inc → Littlefield Pit**

- 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:** Owen J Folsom Inc → Littlefield Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Owen J  Folsom → Littlefield Pit; 1950-01-01 to 2026-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Owen J  Folsom → Owen J Folsom Inc; 1950-01-01 to 2026-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Brandi B  Folsom et al → Littlefield Pit; 2026-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brandi B  Folsom et al → Owen J Folsom Inc; 2026-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason O  Folsom et al → Owen J Folsom Inc; 2026-08-16 to current/open; source msha-controller-operator-history