# Relationship history for MSHA mine 4202404

Current hierarchy: **CCI  (Clyde Companies Inc) → W.W. Clyde & Co. → 24-1040**

- 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) → 24-1040; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** W.W. Clyde & Co. → 24-1040; 2005-04-01 to 2011-03-22; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → W.W. Clyde & Co.; 2005-04-01 to 2011-03-22; source msha-controller-operator-history
- **operator_operates_mine:** Copper Hills Constructors → 24-1040; 2011-03-23 to 2012-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Granite Construction Inc → 24-1040; 2011-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Copper Hills Constructors; 2011-03-23 to 2012-02-29; source msha-controller-operator-history
- **operator_operates_mine:** W.W. Clyde & Co. → 24-1040; 2012-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → W.W. Clyde & Co.; 2012-03-01 to current/open; source msha-controller-operator-history