# Relationship history for MSHA mine 3500490

Current hierarchy: **Bob  Stewart → Klamath Pacific Corp → CRUSHER #2**

- 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:** Stukel Rock & Paving Inc → CRUSHER #2; 1950-01-01 to 1986-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Donald R  Claunch → CRUSHER #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald R  Claunch → Stukel Rock & Paving Inc; 1950-01-01 to 1986-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Bob  Stewart → CRUSHER #2; 1986-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Klamath Pacific Corp → CRUSHER #2; 1986-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bob  Stewart → Klamath Pacific Corp; 1986-07-30 to current/open; source msha-controller-operator-history