# Relationship history for MSHA mine 1302458

Current hierarchy: **Corley  Abel; Clark  Abel → Abel Drainage & Excavating, Inc → Sassman's 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:** Abel Drainage & Excavating, Inc → Sassman's Pit; 2016-09-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clark  Abel → Sassman's Pit; 2016-09-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clark  Abel → Abel Drainage & Excavating, Inc; 2016-09-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Corley  Abel → Abel Drainage & Excavating, Inc; 2016-09-20 to current/open; source msha-controller-operator-history