# Relationship history for MSHA mine 3304119

Current hierarchy: **Forest Coal Company → Mountain Spring Coal Company → Owv 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

- **operator_operates_mine:** Ohio Wv Coal → Owv Mine; 1987-11-01 to 1989-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Gilmer Inc & Elowva Coal Company → Owv Mine; 1987-11-01 to 1989-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Gilmer Inc & Elowva Coal Company → Ohio Wv Coal; 1987-11-01 to 1989-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Spring Coal Company → Owv Mine; 1989-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Forest Coal Company → Owv Mine; 1989-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Forest Coal Company → Mountain Spring Coal Company; 1989-03-01 to current/open; source msha-controller-operator-history