# Relationship history for MSHA mine 1512944

Current hierarchy: **Woods Glen → Tripple E Construction → Travis Creek Mine No 2**

- 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:** Mc Keehan Darrell → Travis Creek Mine No 2; 1979-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hillside Construction Company Inc → Travis Creek Mine No 2; 1981-06-01 to 1981-10-28; source msha-controller-operator-history
- **controller_controls_operator:** Mc Keehan Darrell → Hillside Construction Company Inc; 1981-06-01 to 1981-10-28; source msha-controller-operator-history
- **operator_operates_mine:** Tripple E Construction → Travis Creek Mine No 2; 1981-10-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Woods Glen → Travis Creek Mine No 2; 1981-10-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Woods Glen → Tripple E Construction; 1981-10-29 to current/open; source msha-controller-operator-history