# Relationship history for MSHA mine 4703028

Current hierarchy: **Kurt  Bechthold → Northeast Asphalt, Inc. → PS-1**

- 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-1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kurt  Bechthold et al → PS-1; 1988-10-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Payne & Dolan Inc → PS-1; 1994-05-01 to 2022-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Bechthold et al → Payne & Dolan Inc; 1994-05-01 to 2022-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Northeast Asphalt, Inc. → PS-1; 2022-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Bechthold et al → Northeast Asphalt, Inc.; 2022-06-30 to current/open; source msha-controller-operator-history