# Relationship history for MSHA mine 4608178

Current hierarchy: **Keeney Timothy A → Pocahontas Resources Inc → Cottle Surface Mine**

- 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:** Beveridge James & Denver R Knight → Cottle Surface Mine; 1992-02-10 to 1993-01-14; source msha-controller-operator-history
- **operator_operates_mine:** Pocahontas Resources Inc → Cottle Surface Mine; 1992-05-01 to 1992-12-21; source msha-controller-operator-history
- **controller_controls_operator:** Beveridge James & Denver R Knight → Pocahontas Resources Inc; 1992-05-01 to 1992-12-21; source msha-controller-operator-history
- **operator_operates_mine:** Pocahontas Resources Inc → Cottle Surface Mine; 1992-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Keeney Timothy A → Cottle Surface Mine; 1992-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keeney Timothy A → Pocahontas Resources Inc; 1992-12-22 to current/open; source msha-controller-operator-history