# Relationship history for MSHA mine 0301510

Current hierarchy: **Exxon Mobil Corp → Carter Mining Company → New Hope Test 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

- **controller_controls_mine:** Exxon Mobil Corp → New Hope Test Pit; 1975-01-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carter Mining Company → New Hope Test Pit; 1981-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Exxon Mobil Corp → Carter Mining Company; 1981-07-01 to current/open; source msha-controller-operator-history