# Relationship history for MSHA mine 0401930

Current hierarchy: **Donald W  Van Pelt → Clearlake Lava Inc → Hidden Valley Sand & Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Hidden Valley Sand & Gravel Inc → Hidden Valley Sand & Gravel; 1950-01-01 to 1994-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth R  Hilger → Hidden Valley Sand & Gravel; 1950-01-01 to 1998-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth R  Hilger → Hidden Valley Sand & Gravel Inc; 1950-01-01 to 1994-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Clearlake Lava Inc → Hidden Valley Sand & Gravel; 1994-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Beverly  Van Pelt  et al → Hidden Valley Sand & Gravel; 1994-07-15 to 2020-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Beverly  Van Pelt  et al → Clearlake Lava Inc; 1994-07-15 to 2020-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Van Pelt  et al → Clearlake Lava Inc; 1994-07-15 to 2020-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Donald W  Van Pelt → Hidden Valley Sand & Gravel; 2020-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald W  Van Pelt → Clearlake Lava Inc; 2020-03-12 to current/open; source msha-controller-operator-history