# Relationship history for MSHA mine 3502971

Current hierarchy: **Kemmerieh Donald → Macon Mining & Manufacturing Inc → Yellowhorn Mine & Mill**

- 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:** William M Lasiter → Yellowhorn Mine & Mill; 1979-12-01 to 1981-11-16; source msha-controller-operator-history
- **controller_controls_mine:** Lasiter William M → Yellowhorn Mine & Mill; 1979-12-01 to 1981-11-16; source msha-controller-operator-history
- **controller_controls_operator:** Lasiter William M → William M Lasiter; 1979-12-01 to 1981-11-16; source msha-controller-operator-history
- **operator_operates_mine:** Macon Mining & Manufacturing Inc → Yellowhorn Mine & Mill; 1981-11-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kemmerieh Donald → Yellowhorn Mine & Mill; 1981-11-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kemmerieh Donald → Macon Mining & Manufacturing Inc; 1981-11-17 to current/open; source msha-controller-operator-history