# Relationship history for MSHA mine 0503546

Current hierarchy: **Butt Jim C → Jim C Butt → Summit-Black Jack**

- 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:** Robert M Hurst Mining → Summit-Black Jack; 1980-03-01 to 1988-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Hurst Robert M → Summit-Black Jack; 1980-03-01 to 1988-07-24; source msha-controller-operator-history
- **controller_controls_operator:** Hurst Robert M → Robert M Hurst Mining; 1980-03-01 to 1988-07-24; source msha-controller-operator-history
- **operator_operates_mine:** Long Brothers → Summit-Black Jack; 1988-07-25 to 1989-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Long Nelson J (Rocky)--Michael D Et Al → Summit-Black Jack; 1988-07-25 to 1989-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Long Nelson J (Rocky)--Michael D Et Al → Long Brothers; 1988-07-25 to 1989-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Jim C Butt → Summit-Black Jack; 1989-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Butt Jim C → Summit-Black Jack; 1989-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Butt Jim C → Jim C Butt; 1989-08-01 to current/open; source msha-controller-operator-history