# Relationship history for MSHA mine 3401451

Current hierarchy: **City Of Shawnee-Ok → City Of Shawnee → K & M Sand**

- 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:** Darrell Trucking → K & M Sand; 1984-04-01 to 1988-12-19; source msha-controller-operator-history
- **controller_controls_mine:** Mankin Darrell → K & M Sand; 1984-04-01 to 1988-12-19; source msha-controller-operator-history
- **controller_controls_operator:** Mankin Darrell → Darrell Trucking; 1984-04-01 to 1988-12-19; source msha-controller-operator-history
- **operator_operates_mine:** City Of Shawnee → K & M Sand; 1988-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** City Of Shawnee-Ok → K & M Sand; 1988-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** City Of Shawnee-Ok → City Of Shawnee; 1988-12-20 to current/open; source msha-controller-operator-history