# Relationship history for MSHA mine 4503143

Current hierarchy: **Michael J  Addleman → Bethlehem Sand & Gravel Inc → Palisades 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

- **controller_controls_mine:** Eddie E  Smith → Palisades Pit; 1985-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Asphalt Specialties Inc → Palisades Pit; 1987-08-01 to 1991-07-15; source msha-controller-operator-history
- **controller_controls_operator:** Eddie E  Smith → Asphalt Specialties Inc; 1987-08-01 to 1991-07-15; source msha-controller-operator-history
- **operator_operates_mine:** Bethlehem Sand & Gravel Inc → Palisades Pit; 1991-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael J  Addleman → Palisades Pit; 1991-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael J  Addleman → Bethlehem Sand & Gravel Inc; 1991-07-16 to current/open; source msha-controller-operator-history