# Relationship history for MSHA mine 0405435

Current hierarchy: **Steve  Manning → Steve Manning Construction, Inc. → MANNING PORTABLE PLANT 19-03**

- 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

- **controller_controls_mine:** Donald D  Schnetzer → MANNING PORTABLE PLANT 19-03; 1994-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Schnetzer Engineering Inc → MANNING PORTABLE PLANT 19-03; 2000-05-01 to 2006-09-17; source msha-controller-operator-history
- **controller_controls_operator:** Donald D  Schnetzer → Schnetzer Engineering Inc; 2000-05-01 to 2006-09-17; source msha-controller-operator-history
- **operator_operates_mine:** Steve Manning Construction, Inc. → MANNING PORTABLE PLANT 19-03; 2006-09-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Manning → MANNING PORTABLE PLANT 19-03; 2006-09-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Manning → Steve Manning Construction, Inc.; 2006-09-18 to current/open; source msha-controller-operator-history