# Relationship history for MSHA mine 4800297

Current hierarchy: **Rodney S  Bennett → RS Bennett → Estvold Pit**

- 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:** Skyline Construction Company Inc → Estvold Pit; 1950-01-01 to 2004-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Rodney S  Bennett → Estvold Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rodney S  Bennett → Skyline Construction Company Inc; 1950-01-01 to 2004-08-17; source msha-controller-operator-history
- **operator_operates_mine:** R.S. Bennett Construction → Estvold Pit; 2004-08-18 to 2005-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Rodney S  Bennett → Estvold Pit; 2004-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rodney S  Bennett → R.S. Bennett Construction; 2004-08-18 to 2005-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Green River Rock → Estvold Pit; 2005-10-01 to 2012-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Fear et al → Estvold Pit; 2005-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Fear et al → Green River Rock; 2005-10-01 to 2012-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Rod  Bennett et al → Green River Rock; 2005-10-01 to 2012-04-17; source msha-controller-operator-history
- **operator_operates_mine:** RS Bennett → Estvold Pit; 2012-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rodney S  Bennett → RS Bennett; 2012-04-18 to current/open; source msha-controller-operator-history