# Relationship history for MSHA mine 1401377

Current hierarchy: **CRH PLC → Apac-Kansas Inc  Shears Division → WICHITA SAND 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Ashland Inc → WICHITA SAND PLANT; 1950-01-01 to 2006-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Mid-Kansas Construction Company Inc → WICHITA SAND PLANT; 1980-07-01 to 1988-11-13; source msha-controller-operator-history
- **controller_controls_mine:** Koppers Company Inc → WICHITA SAND PLANT; 1980-07-01 to 1988-11-13; source msha-controller-operator-history
- **controller_controls_operator:** Koppers Company Inc → Mid-Kansas Construction Company Inc; 1980-07-01 to 1988-11-13; source msha-controller-operator-history
- **operator_operates_mine:** Western Mobile Kansas Inc → WICHITA SAND PLANT; 1988-11-14 to 1994-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Redland Plc → WICHITA SAND PLANT; 1988-11-14 to 1994-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Redland Plc → Western Mobile Kansas Inc; 1988-11-14 to 1994-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Asphalt Construction Company → WICHITA SAND PLANT; 1994-04-01 to 2000-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Superfos America Inc → WICHITA SAND PLANT; 1994-04-01 to 2000-02-21; source msha-controller-operator-history
- **controller_controls_operator:** Superfos America Inc → Asphalt Construction Company; 1994-04-01 to 2000-02-21; source msha-controller-operator-history
- **operator_operates_mine:** Apac-Kansas Inc  Shears Division → WICHITA SAND PLANT; 2000-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Apac-Kansas Inc  Shears Division; 2000-02-22 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → WICHITA SAND PLANT; 2006-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Apac-Kansas Inc  Shears Division; 2006-08-28 to current/open; source msha-controller-operator-history