# Relationship history for MSHA mine 1513722

Current hierarchy: **Chester  Franklin → Sam C Franklin & Son Inc → Couch Branch 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:** Vires Coal Sales Inc → Couch Branch Mine; 1982-09-01 to 2001-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Vires Darrell & Leo → Couch Branch Mine; 1982-09-01 to 2001-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Vires Darrell & Leo → Vires Coal Sales Inc; 1982-09-01 to 2001-04-06; source msha-controller-operator-history
- **operator_operates_mine:** Sam C Franklin & Son Inc → Couch Branch Mine; 2001-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chester  Franklin → Couch Branch Mine; 2001-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chester  Franklin → Sam C Franklin & Son Inc; 2001-04-07 to current/open; source msha-controller-operator-history