# Relationship history for MSHA mine 4103057

Current hierarchy: **Weatherford Lloyd → Lloyd Weatherford → Lloyd Weatherford**

- 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:** Dahlstrom Resources Inc → Lloyd Weatherford; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William  Boorhem  et al → Lloyd Weatherford; 1979-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tenneco Uranium Inc → Lloyd Weatherford; 1981-01-01 to 1981-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Tenneco Inc → Lloyd Weatherford; 1981-01-01 to 1987-05-20; source msha-controller-operator-history
- **controller_controls_operator:** Tenneco Inc → Tenneco Uranium Inc; 1981-01-01 to 1981-03-01; source msha-controller-operator-history
- **operator_operates_mine:** Dahlstrom Corp → Lloyd Weatherford; 1981-03-02 to 1985-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Dahlstrom Resources Inc → Dahlstrom Corp; 1981-03-02 to 1985-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Boorhem-Fields Inc → Lloyd Weatherford; 1985-05-01 to 1989-02-01; source msha-controller-operator-history
- **controller_controls_operator:** William  Boorhem  et al → Boorhem-Fields Inc; 1985-05-01 to 1989-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Lloyd Weatherford → Lloyd Weatherford; 1989-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Weatherford Lloyd → Lloyd Weatherford; 1989-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Weatherford Lloyd → Lloyd Weatherford; 1989-02-02 to current/open; source msha-controller-operator-history