# Relationship history for MSHA mine 4801842

Current hierarchy: **David  Pitt → Terry R. Pitt Construction Inc. → Crusher #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

- **operator_operates_mine:** Terry R. Pitt Construction Inc. → Crusher #1; 2020-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David  Pitt → Crusher #1; 2020-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Pitt → Terry R. Pitt Construction Inc.; 2020-11-05 to current/open; source msha-controller-operator-history