# Relationship history for MSHA mine 4103094

Current hierarchy: **Butler Industries → Hays County Gravel Company → Mc Queeney Pit & Plant**

- 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:** Ingram Rowland → Mc Queeney Pit & Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Centex Ingram Inc → Mc Queeney Pit & Plant; 1981-06-01 to 1984-12-11; source msha-controller-operator-history
- **controller_controls_operator:** Ingram Rowland → Centex Ingram Inc; 1981-06-01 to 1984-12-11; source msha-controller-operator-history
- **operator_operates_mine:** Hays County Gravel Company → Mc Queeney Pit & Plant; 1984-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Butler Industries → Mc Queeney Pit & Plant; 1984-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Butler Industries → Hays County Gravel Company; 1984-12-12 to current/open; source msha-controller-operator-history