# Relationship history for MSHA mine 1517301

Current hierarchy: **Hammons Dennise → Yellow Creek Corp → #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:** T & H Construction → #1; 1992-09-01 to 1993-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Hurst Thomas Et Al → #1; 1992-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hurst Thomas Et Al → T & H Construction; 1992-09-01 to 1993-06-14; source msha-controller-operator-history
- **operator_operates_mine:** 3-Boy Coal → #1; 1993-06-15 to 1994-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Skidmore Tommy Et Al → #1; 1993-06-15 to 1994-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Skidmore Tommy Et Al → 3-Boy Coal; 1993-06-15 to 1994-08-17; source msha-controller-operator-history
- **operator_operates_mine:** Yellow Creek Corp → #1; 1994-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hammons Dennise → #1; 1994-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hammons Dennise → Yellow Creek Corp; 1994-08-18 to current/open; source msha-controller-operator-history