# Relationship history for MSHA mine 0500079

Current hierarchy: **L. Dean  Loukonen → Loukonen Brothers Stone → WEAVER QUARRY**

- 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:** L. Dean  Loukonen et al → WEAVER QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Weaver Stone Company → WEAVER QUARRY; 1950-01-01 to 1992-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Paul A  Smith → WEAVER QUARRY; 1950-01-01 to 1992-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Paul A  Smith → Weaver Stone Company; 1950-01-01 to 1992-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Loukonen Brothers Stone → WEAVER QUARRY; 1992-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** L. Dean  Loukonen et al → Loukonen Brothers Stone; 1992-04-01 to current/open; source msha-controller-operator-history