# Relationship history for MSHA mine 4202084

Current hierarchy: **CCI  (Clyde Companies Inc) → Suncore Construction and Materials Inc. → PORTABLE CRUSHER**

- 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) → PORTABLE CRUSHER; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harold E  Davis → PORTABLE CRUSHER; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** H E Davis & Sons Construction, Inc → PORTABLE CRUSHER; 1993-05-01 to 2002-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Harold E  Davis → H E Davis & Sons Construction, Inc; 1993-05-01 to 2002-03-31; source msha-controller-operator-history
- **operator_operates_mine:** H E Davis Construction , Inc → PORTABLE CRUSHER; 2002-04-01 to 2005-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CCI  (Clyde Companies Inc) → PORTABLE CRUSHER; 2002-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → H E Davis Construction , Inc; 2002-04-01 to 2005-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Suncore Construction and Materials Inc. → PORTABLE CRUSHER; 2006-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Suncore Construction and Materials Inc.; 2006-01-01 to current/open; source msha-controller-operator-history