# Relationship history for MSHA mine 3607456

Current hierarchy: **Kerry  Harris → D & F Deep Mine → Buck Drift**

- 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:** D & F Deep Mine Buck Drift → Buck Drift; 1983-04-01 to 2000-09-10; source msha-controller-operator-history
- **controller_controls_mine:** Dando Frederick P Et Al → Buck Drift; 1983-04-01 to 2000-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Dando Frederick P Et Al → D & F Deep Mine Buck Drift; 1983-04-01 to 2000-09-10; source msha-controller-operator-history
- **operator_operates_mine:** D & F Deep Mine → Buck Drift; 2000-09-11 to 2011-09-29; source msha-controller-operator-history
- **controller_controls_mine:** Randy C  Rothermel Jr  et al → Buck Drift; 2000-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy C  Rothermel Jr  et al → D & F Deep Mine; 2000-09-11 to 2011-09-29; source msha-controller-operator-history
- **controller_controls_operator:** Cindy L  Rothermel  et al → D & F Deep Mine; 2000-09-11 to 2011-09-29; source msha-controller-operator-history
- **operator_operates_mine:** D & F Deep Mine → Buck Drift; 2011-09-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kerry  Harris → Buck Drift; 2011-09-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kerry  Harris → D & F Deep Mine; 2011-09-30 to current/open; source msha-controller-operator-history