# Relationship history for MSHA mine 4405762

Current hierarchy: **Long Wallace → B & W Construction Company Inc → #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

- **controller_controls_mine:** E H  Lester → #2 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Virginia By-Products → #2 Mine; 1981-09-01 to 1985-09-30; source msha-controller-operator-history
- **controller_controls_operator:** E H  Lester → Virginia By-Products; 1981-09-01 to 1985-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Virginia By-Product → #2 Mine; 1985-10-01 to 1988-02-16; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Amax Minerals Company → #2 Mine; 1985-10-01 to 1988-02-16; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Virginia By-Product; 1985-10-01 to 1988-02-16; source msha-controller-operator-history
- **controller_controls_mine:** Long Wallace Et Al → #2 Mine; 1986-07-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & W Construction Company Inc → #2 Mine; 1988-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Long Wallace Et Al → B & W Construction Company Inc; 1988-02-17 to current/open; source msha-controller-operator-history