# Relationship history for MSHA mine 3900828

Current hierarchy: **Molly  Dahme → Dahme Construction Company Inc → Lindsey 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:** Dahme Construction Company Inc → Lindsey Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary H  Dahme  et al → Lindsey Pit; 1950-01-01 to 2017-01-11; source msha-controller-operator-history
- **controller_controls_operator:** Gary H  Dahme  et al → Dahme Construction Company Inc; 1950-01-01 to 2017-01-11; source msha-controller-operator-history
- **controller_controls_mine:** Molly  Dahme → Lindsey Pit; 2017-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Molly  Dahme → Dahme Construction Company Inc; 2017-01-12 to current/open; source msha-controller-operator-history