# Relationship history for MSHA mine 4800284

Current hierarchy: **CCI  (Clyde Companies Inc) → Suncore Construction and Materials Inc. → Mobile Crusher - 76-4034**

- 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:** CCI  (Clyde Companies Inc) → Mobile Crusher - 76-4034; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Layos Inc → Mobile Crusher - 76-4034; 1950-01-01 to 2004-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Bob  Layos et al → Mobile Crusher - 76-4034; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bob  Layos et al → Layos Inc; 1950-01-01 to 2004-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Layos et al → Layos Inc; 1950-01-01 to 2004-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Gorge Rock Products → Mobile Crusher - 76-4034; 2004-03-01 to 2017-08-31; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Gorge Rock Products; 2004-03-01 to 2017-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Suncore Construction and Materials Inc. → Mobile Crusher - 76-4034; 2017-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Suncore Construction and Materials Inc.; 2017-09-01 to current/open; source msha-controller-operator-history