# Relationship history for MSHA mine 3402100

Current hierarchy: **Chris  Camden → Interstate Gypsum LLC → Rother 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

- **operator_operates_mine:** Road Construction Specialties → Rother Pit; 2009-12-21 to 2012-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Chris  Camden → Rother Pit; 2009-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Camden → Road Construction Specialties; 2009-12-21 to 2012-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Chris  Camden → Rother Pit; 2012-06-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Interstate Gypsum LLC → Rother Pit; 2012-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Camden → Interstate Gypsum LLC; 2012-06-28 to current/open; source msha-controller-operator-history