# Relationship history for MSHA mine 0403301

Current hierarchy: **Brown Adair → Adair Brown Company → Strathmore Granite 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:** Glen Gates Company → Strathmore Granite Pit; 1950-01-01 to 1979-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Gates Glen → Strathmore Granite Pit; 1950-01-01 to 1979-03-21; source msha-controller-operator-history
- **controller_controls_operator:** Gates Glen → Glen Gates Company; 1950-01-01 to 1979-03-21; source msha-controller-operator-history
- **operator_operates_mine:** Charles Gil Company → Strathmore Granite Pit; 1979-03-22 to 1981-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Gil Charles → Strathmore Granite Pit; 1979-03-22 to 1981-03-08; source msha-controller-operator-history
- **controller_controls_operator:** Gil Charles → Charles Gil Company; 1979-03-22 to 1981-03-08; source msha-controller-operator-history
- **operator_operates_mine:** Adair Brown Company → Strathmore Granite Pit; 1981-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brown Adair → Strathmore Granite Pit; 1981-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brown Adair → Adair Brown Company; 1981-03-09 to current/open; source msha-controller-operator-history