# Relationship history for MSHA mine 4703593

Current hierarchy: **Kurt  Bechthold → Northeast Asphalt Inc → PS-2**

- 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:** Kurt  Bechthold et al → PS-2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kurt  Bechthold et al → PS-2; 1988-10-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Payne & Dolan Inc → PS-2; 2010-09-23 to 2020-08-11; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Bechthold et al → Payne & Dolan Inc; 2010-09-23 to 2020-08-11; source msha-controller-operator-history
- **operator_operates_mine:** Northeast Asphalt Inc → PS-2; 2020-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Bechthold et al → Northeast Asphalt Inc; 2020-08-12 to current/open; source msha-controller-operator-history