# Relationship history for MSHA mine 0302018

Current hierarchy: **CRH PLC → APAC-Central Inc. → Hard Rock Quarry**

- 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 → Hard Rock Quarry; 1950-01-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Hard Rock Quarry; 2006-08-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Marion County Paving and Excavating, LLC → Hard Rock Quarry; 2011-08-04 to 2014-08-26; source msha-controller-operator-history
- **controller_controls_mine:** Joe  Davenport → Hard Rock Quarry; 2011-08-04 to 2013-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Davenport → Marion County Paving and Excavating, LLC; 2011-08-04 to 2013-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Shane W  Davenport et al → Hard Rock Quarry; 2013-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shane W  Davenport et al → Marion County Paving and Excavating, LLC; 2013-04-12 to 2014-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Darla W  Davenport et al → Marion County Paving and Excavating, LLC; 2013-04-12 to 2014-08-26; source msha-controller-operator-history
- **operator_operates_mine:** Marion County Paving, LLC → Hard Rock Quarry; 2014-08-27 to 2022-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Darla W  Davenport et al → Hard Rock Quarry; 2014-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darla W  Davenport et al → Marion County Paving, LLC; 2014-08-27 to 2022-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Shane W  Davenport et al → Marion County Paving, LLC; 2014-08-27 to 2022-03-20; source msha-controller-operator-history
- **operator_operates_mine:** APAC-Central Inc. → Hard Rock Quarry; 2022-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC-Central Inc.; 2022-03-21 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC-Central Inc.; 2022-03-21 to current/open; source msha-controller-operator-history