# Relationship history for MSHA mine 4003313

Current hierarchy: **Jeffery  Self → Frostbite Stone → Otis Quarry #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:** Frostbite Stone → Otis Quarry #1; 2008-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery  Self → Otis Quarry #1; 2008-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery  Self → Frostbite Stone; 2008-01-29 to current/open; source msha-controller-operator-history