# Relationship history for MSHA mine 4001977

Current hierarchy: **William M  Bale → U S Coal Inc → #3-2 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:** Billran Coal Company → #3-2 Mine; 1976-01-01 to 1976-09-06; source msha-controller-operator-history
- **controller_controls_mine:** United Innkeepers Inc → #3-2 Mine; 1976-01-01 to 1976-09-06; source msha-controller-operator-history
- **controller_controls_operator:** United Innkeepers Inc → Billran Coal Company; 1976-01-01 to 1976-09-06; source msha-controller-operator-history
- **operator_operates_mine:** U S Coal Inc → #3-2 Mine; 1976-09-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William M  Bale → #3-2 Mine; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William M  Bale → U S Coal Inc; 2001-04-01 to current/open; source msha-controller-operator-history