# Relationship history for MSHA mine 4801671

Current hierarchy: **CCI  (Clyde Companies Inc) → Suncore Construction and Materials Inc. → Layos Pit 564**

- 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) → Layos Pit 564; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Arrowhead Concrete Inc → Layos Pit 564; 2005-03-08 to 2018-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Cory Jo  Bernard et al → Layos Pit 564; 2005-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cory Jo  Bernard et al → Arrowhead Concrete Inc; 2005-03-08 to 2018-04-19; source msha-controller-operator-history
- **controller_controls_operator:** Jerry W  Cover  et al → Arrowhead Concrete Inc; 2005-03-08 to 2018-04-19; source msha-controller-operator-history
- **operator_operates_mine:** Suncore Construction and Materials Inc. → Layos Pit 564; 2018-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Suncore Construction and Materials Inc.; 2018-04-20 to current/open; source msha-controller-operator-history