# Relationship history for MSHA mine 4407050

Current hierarchy: **Adams Construction Company → Adams Construction Company → Daniel 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Ashland Inc → Daniel Sand Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adams Construction Company → Daniel Sand Plant; 1983-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** APAC-Virginia, Inc. → Daniel Sand Plant; 2002-07-11 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC-Virginia, Inc.; 2002-07-11 to 2003-03-31; source msha-controller-operator-history
- **operator_operates_mine:** APAC-Atlantic Inc Thompson-Arthur Division → Daniel Sand Plant; 2003-04-01 to 2007-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc → Daniel Sand Plant; 2003-04-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC-Atlantic Inc Thompson-Arthur Division; 2003-04-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Daniel Sand Plant; 2006-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC-Atlantic Inc Thompson-Arthur Division; 2006-08-28 to 2007-02-28; source msha-controller-operator-history
- **operator_operates_mine:** W-L Construction and Paving, Inc → Daniel Sand Plant; 2007-03-01 to 2015-07-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Daniel Sand Plant; 2007-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → W-L Construction and Paving, Inc; 2007-03-01 to 2015-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Adams Construction Company → Daniel Sand Plant; 2015-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adams Construction Company → Adams Construction Company; 2015-07-28 to current/open; source msha-controller-operator-history