# Relationship history for MSHA mine 3301662

Current hierarchy: **CRH PLC → Shelly Materials, Inc. → Haver Hill Plant**

- 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:** Standard Slag Company → Haver Hill Plant; 1950-01-01 to 1989-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Standard Slag Company → Haver Hill Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Standard Slag Company → Standard Slag Company; 1950-01-01 to 1989-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Standard Lafarge → Haver Hill Plant; 1989-10-01 to 1994-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Haver Hill Plant; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Standard Lafarge; 1989-10-01 to 1994-02-21; source msha-controller-operator-history
- **operator_operates_mine:** Ats Enterprises → Haver Hill Plant; 1994-02-22 to 2005-10-27; source msha-controller-operator-history
- **controller_controls_mine:** Lawson Ltd Partnership  et al → Haver Hill Plant; 1994-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawson Ltd Partnership  et al → Ats Enterprises; 1994-02-22 to 2005-10-27; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Catlinsburg Paving Inc  et al → Ats Enterprises; 1994-02-22 to 2005-10-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Haver Hill Plant; 2000-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Shelly Materials, Inc. → Haver Hill Plant; 2005-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Shelly Materials, Inc.; 2005-10-28 to current/open; source msha-controller-operator-history