# Relationship history for MSHA mine 1508068

Current hierarchy: **Mc Coy Harry P → Patrick D Price Petroleum Products Inc → South Hill Strip**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Quasar Mining Inc → South Hill Strip; 1975-01-20 to 1977-11-10; source msha-controller-operator-history
- **controller_controls_mine:** Davoust Richard C → South Hill Strip; 1975-01-20 to 1977-11-10; source msha-controller-operator-history
- **controller_controls_operator:** Davoust Richard C → Quasar Mining Inc; 1975-01-20 to 1977-11-10; source msha-controller-operator-history
- **controller_controls_mine:** Mc Coy Harry P → South Hill Strip; 1977-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Patrick D Price Petroleum Products Inc → South Hill Strip; 1977-11-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Coy Harry P → Patrick D Price Petroleum Products Inc; 1977-11-11 to current/open; source msha-controller-operator-history