# Relationship history for MSHA mine 4103305

Current hierarchy: **Byrd Linda & Tom Day → Valley View Crushed Stone → Valley View Crushed Stone**

- 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:** Brandywilde Development Inc → Valley View Crushed Stone; 1985-04-01 to 1986-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Jesse  Byrd Sr et al → Valley View Crushed Stone; 1985-04-01 to 1986-08-27; source msha-controller-operator-history
- **controller_controls_operator:** Jesse  Byrd Sr et al → Brandywilde Development Inc; 1985-04-01 to 1986-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Valley View Crushed Stone → Valley View Crushed Stone; 1986-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Byrd Linda & Tom Day → Valley View Crushed Stone; 1986-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Byrd Linda & Tom Day → Valley View Crushed Stone; 1986-08-28 to current/open; source msha-controller-operator-history