# Relationship history for MSHA mine 2900960

Current hierarchy: **Western General Resources Inc → Western General Resources Inc → Bingham 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:** Farris Mines Inc → Bingham Mine; 1950-01-01 to 1980-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Farris Jerry F & Merle Burns → Bingham Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Farris Jerry F & Merle Burns → Farris Mines Inc; 1950-01-01 to 1980-06-03; source msha-controller-operator-history
- **operator_operates_mine:** Western General Resources Inc → Bingham Mine; 1980-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Western General Resources Inc → Bingham Mine; 1980-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Western General Resources Inc → Western General Resources Inc; 1980-06-04 to current/open; source msha-controller-operator-history