# Relationship history for MSHA mine 1202455

Current hierarchy: **Kenneth E  Steiner Jr → S&G Excavating, Inc. → Kerns 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

- **controller_controls_mine:** Kenneth E  Steiner Jr → Kerns Pit; 1978-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S&G Excavating, Inc. → Kerns Pit; 2012-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth E  Steiner Jr → S&G Excavating, Inc.; 2012-05-22 to current/open; source msha-controller-operator-history