# Relationship history for MSHA mine 3610328

Current hierarchy: **Lucas D  Mack → Cold Ridge Stone → Cold Ridge Mobile**

- 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:** Lucas D  Mack  et al → Cold Ridge Mobile; 2008-09-04 to 2020-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Lucas D  Mack → Cold Ridge Mobile; 2020-01-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cold Ridge Stone → Cold Ridge Mobile; 2020-04-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lucas D  Mack  et al → Cold Ridge Stone; 2020-04-03 to 2020-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Dean M  Mack  et al → Cold Ridge Stone; 2020-04-03 to 2020-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Lucas D  Mack → Cold Ridge Stone; 2020-04-03 to current/open; source msha-controller-operator-history