# Relationship history for MSHA mine 4000328

Current hierarchy: **Ronnie H  Carroll → Straight Creek Mining Inc → Sunshine**

- 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:** Shattuck Coal Company → Sunshine; 1950-01-01 to 1975-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Shattuck Tom N → Sunshine; 1950-01-01 to 1976-08-24; source msha-controller-operator-history
- **controller_controls_operator:** Shattuck Tom N → Shattuck Coal Company; 1950-01-01 to 1975-05-15; source msha-controller-operator-history
- **operator_operates_mine:** Colquest Energy Inc → Sunshine; 1975-05-16 to 2000-05-14; source msha-controller-operator-history
- **controller_controls_mine:** K Q  Chedester → Sunshine; 1975-05-16 to 2000-05-14; source msha-controller-operator-history
- **controller_controls_operator:** K Q  Chedester → Colquest Energy Inc; 1975-05-16 to 2000-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Ronnie H  Carroll → Sunshine; 1995-03-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Straight Creek Mining Inc → Sunshine; 2000-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronnie H  Carroll → Straight Creek Mining Inc; 2000-05-15 to current/open; source msha-controller-operator-history