# Relationship history for MSHA mine 4703831

Current hierarchy: **Joel Robert  Ovyn; William D  Ovyn; Darren G  Ovyn → Dennis Ovyn Trucking, Inc. → Ovyn #2 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

- **controller_controls_mine:** Dennis  Ovyn → Ovyn #2 Pit; 1994-02-01 to 2019-12-30; source msha-controller-operator-history
- **operator_operates_mine:** DENNIS OVYN TRUCKING INC → Ovyn #2 Pit; 2018-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Ovyn → DENNIS OVYN TRUCKING INC; 2018-08-15 to 2019-12-30; source msha-controller-operator-history
- **controller_controls_mine:** William D  Ovyn et al → Ovyn #2 Pit; 2019-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William D  Ovyn et al → DENNIS OVYN TRUCKING INC; 2019-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darren G  Ovyn et al → DENNIS OVYN TRUCKING INC; 2019-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joel Robert  Ovyn et al → DENNIS OVYN TRUCKING INC; 2019-12-31 to current/open; source msha-controller-operator-history