# Relationship history for MSHA mine 1302279

Current hierarchy: **Travis  Stensland → Stensland Gravel Co. → Crusher (S 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Dennis L  Stensland et al → Crusher (S Pit); 1980-04-15 to 2021-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Stensland Gravel Co. → Crusher (S Pit); 2004-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis L  Stensland et al → Stensland Gravel Co.; 2004-03-23 to 2021-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Janet K  Stensland et al → Stensland Gravel Co.; 2004-03-23 to 2021-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Travis  Stensland → Crusher (S Pit); 2021-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis  Stensland → Stensland Gravel Co.; 2021-02-01 to current/open; source msha-controller-operator-history