# Relationship history for MSHA mine 2602255

Current hierarchy: **Newmont Corporation → Newmont USA Limited → DEEP STAR MINE**

- 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:** Newmont Corporation → DEEP STAR MINE; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronald W  Guill → DEEP STAR MINE; 1988-04-01 to 2011-01-27; source msha-controller-operator-history
- **operator_operates_mine:** Small Mine Development → DEEP STAR MINE; 1994-05-01 to 1995-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Ronald W  Guill → Small Mine Development; 1994-05-01 to 1995-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Newmont USA Limited → DEEP STAR MINE; 1995-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Newmont Corporation → Newmont USA Limited; 1995-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Keith  Jones → DEEP STAR MINE; 2011-01-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Jones → Small Mine Development; 2011-01-28 to 1995-08-31; source msha-controller-operator-history