# Relationship history for MSHA mine 3608309

Current hierarchy: **Niles V  Powell → ACV Power Corporation → Russellton Site**

- 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:** Four-D Coal Company Inc → Russellton Site; 1991-12-01 to 1994-04-11; source msha-controller-operator-history
- **controller_controls_mine:** B A  Steyer → Russellton Site; 1991-12-01 to 1994-04-11; source msha-controller-operator-history
- **controller_controls_operator:** B A  Steyer → Four-D Coal Company Inc; 1991-12-01 to 1994-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Niles V  Powell → Russellton Site; 1993-11-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Acv Power Corp → Russellton Site; 1994-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Niles V  Powell → Acv Power Corp; 1994-04-12 to current/open; source msha-controller-operator-history