# Relationship history for MSHA mine 2103482

Current hierarchy: **Chris J  Nibbe → A & C Excavating → Pit #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:** D & S Const → Pit #1; 2005-04-13 to 2009-03-24; source msha-controller-operator-history
- **controller_controls_mine:** David R Scotting → Pit #1; 2005-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David R Scotting → D & S Const; 2005-04-13 to 2009-03-24; source msha-controller-operator-history
- **operator_operates_mine:** A & C Excavating → Pit #1; 2009-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chris J  Nibbe → Pit #1; 2009-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris J  Nibbe → A & C Excavating; 2009-03-25 to current/open; source msha-controller-operator-history