# Relationship history for MSHA mine 1512958

Current hierarchy: **Vandiver Lewis → Deer Creek Mining Company → Deer Creek**

- 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:** Deer Creek Mining Company → Deer Creek; 1981-06-01 to 1991-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Vandiver Lewis Et Al → Deer Creek; 1981-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vandiver Lewis Et Al → Deer Creek Mining Company; 1981-06-01 to 1991-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Mc Coy John P → Deer Creek; 1988-02-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Prosperity Mining Inc → Deer Creek; 1991-06-17 to 1991-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Mc Coy John P → Prosperity Mining Inc; 1991-06-17 to 1991-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Deer Creek Mining Company → Deer Creek; 1991-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vandiver Lewis Et Al → Deer Creek Mining Company; 1991-11-01 to current/open; source msha-controller-operator-history