# Relationship history for MSHA mine 3001289

Current hierarchy: **CRH PLC → Dolomite Group → Knight Settlement Sand & Gravel LLC**

- 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

- **operator_operates_mine:** Knight Settlement Sand & Gravel Inc → Knight Settlement Sand & Gravel LLC; 1950-01-01 to 1985-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Duane H  Loomis → Knight Settlement Sand & Gravel LLC; 1950-01-01 to 1985-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Duane H  Loomis → Knight Settlement Sand & Gravel Inc; 1950-01-01 to 1985-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Knight Settlement Sand & Gravel Inc → Knight Settlement Sand & Gravel LLC; 1985-04-01 to 2001-06-24; source msha-controller-operator-history
- **controller_controls_mine:** L H  Billings → Knight Settlement Sand & Gravel LLC; 1985-04-01 to 2001-06-24; source msha-controller-operator-history
- **controller_controls_operator:** L H  Billings → Knight Settlement Sand & Gravel Inc; 1985-04-01 to 2001-06-24; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Knight Settlement Sand & Gravel LLC; 2000-06-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Knight Settlement Sand & Gravel LLC → Knight Settlement Sand & Gravel LLC; 2001-06-25 to 2026-05-11; source msha-controller-operator-history
- **controller_controls_mine:** Andrew J  Dickson et al → Knight Settlement Sand & Gravel LLC; 2001-06-25 to 2016-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Andrew J  Dickson et al → Knight Settlement Sand & Gravel LLC; 2001-06-25 to 2016-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Bryan S  Dickson et al → Knight Settlement Sand & Gravel LLC; 2001-06-25 to 2016-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Bryan S  Dickson et al → Knight Settlement Sand & Gravel LLC; 2016-06-01 to 2022-08-29; source msha-controller-operator-history
- **controller_controls_operator:** Bryan S  Dickson et al → Knight Settlement Sand & Gravel LLC; 2016-06-01 to 2022-08-29; source msha-controller-operator-history
- **controller_controls_operator:** Leland J  Dickson et al → Knight Settlement Sand & Gravel LLC; 2016-06-01 to 2022-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Bryan S Dickson → Knight Settlement Sand & Gravel LLC; 2022-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bryan S Dickson → Knight Settlement Sand & Gravel LLC; 2022-08-30 to 2026-05-11; source msha-controller-operator-history
- **operator_operates_mine:** Dolomite Group → Knight Settlement Sand & Gravel LLC; 2026-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Dolomite Group; 2026-05-12 to current/open; source msha-controller-operator-history