# Relationship history for MSHA mine 2000885

Current hierarchy: **Carmeuse Holding SA → Carl Schlegel Inc → Davis Pit**

- 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:** Whittum Gravel Company → Davis Pit; 1950-01-01 to 1979-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Whittum Gravel Company → Davis Pit; 1950-01-01 to 1979-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Whittum Gravel Company → Whittum Gravel Company; 1950-01-01 to 1979-05-22; source msha-controller-operator-history
- **controller_controls_mine:** David R  Schlegel → Davis Pit; 1950-01-01 to 2013-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Contractors Sand & Gravel Inc → Davis Pit; 1979-05-23 to 1988-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Michael H  Davis → Davis Pit; 1979-05-23 to 1988-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Michael H  Davis → Contractors Sand & Gravel Inc; 1979-05-23 to 1988-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Carl Schlegel Inc → Davis Pit; 1988-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David R  Schlegel → Carl Schlegel Inc; 1988-04-01 to 2013-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Matt  Schlegel et al → Davis Pit; 2013-12-31 to 2022-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Matt  Schlegel et al → Carl Schlegel Inc; 2013-12-31 to 2022-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Schlegel et al → Carl Schlegel Inc; 2013-12-31 to 2022-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Davis Pit; 2022-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Carl Schlegel Inc; 2022-01-21 to current/open; source msha-controller-operator-history