# Relationship history for MSHA mine 4201610

Current hierarchy: **Lorie  Leavitt; Scott W Crandall; Curtis  Crandall → Crandall's Crushing Corp. → Crandall 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:** Crandall's Crushing Corp. → Crandall Pit; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Orland  Crandall → Crandall Pit; 1979-01-01 to 2016-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Orland  Crandall → Crandall's Crushing Corp.; 1979-01-01 to 2016-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Crandall → Crandall Pit; 2016-01-21 to 2019-12-18; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Crandall → Crandall's Crushing Corp.; 2016-01-21 to 2019-12-18; source msha-controller-operator-history
- **controller_controls_mine:** Colleen  Crandall → Crandall Pit; 2019-12-19 to 2022-11-27; source msha-controller-operator-history
- **controller_controls_operator:** Colleen  Crandall → Crandall's Crushing Corp.; 2019-12-19 to 2022-11-27; source msha-controller-operator-history
- **controller_controls_mine:** Curtis  Crandall et al → Crandall Pit; 2022-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Curtis  Crandall et al → Crandall's Crushing Corp.; 2022-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lorie  Leavitt et al → Crandall's Crushing Corp.; 2022-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott W Crandall et al → Crandall's Crushing Corp.; 2022-11-28 to current/open; source msha-controller-operator-history