# Relationship history for MSHA mine 3400445

Current hierarchy: **CRH PLC → Holliday Sand & Gravel → Haskell Plant #20**

- 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:** Haskell Sand & Gravel Company → Haskell Plant #20; 1950-01-01 to 2003-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Carolyn L  Beene → Haskell Plant #20; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carolyn L  Beene → Haskell Sand & Gravel Company; 1950-01-01 to 2003-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Haskell Sand LLC → Haskell Plant #20; 2003-05-01 to 2017-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Tim  Graham et al → Haskell Plant #20; 2003-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Graham et al → Haskell Sand LLC; 2003-05-01 to 2017-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Johnelle  Hunt et al → Haskell Sand LLC; 2003-05-01 to 2017-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Ash Grove Cement Company → Haskell Plant #20; 2008-08-01 to 2018-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Holliday Sand & Gravel → Haskell Plant #20; 2017-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ash Grove Cement Company → Holliday Sand & Gravel; 2017-08-01 to 2018-06-20; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Haskell Plant #20; 2018-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Holliday Sand & Gravel; 2018-06-21 to current/open; source msha-controller-operator-history