# Relationship history for MSHA mine 3607671

Current hierarchy: **Mark J  Durant → Durant Excavating Company → Durant Strip 002 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Durant Excavating Company → Durant Strip 002 Pit; 1985-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark J  Durant → Durant Strip 002 Pit; 1985-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark J  Durant → Durant Excavating Company; 1985-03-01 to current/open; source msha-controller-operator-history