# Relationship history for MSHA mine 4202243

Current hierarchy: **Dale A  Deming; Darrell Ryce  Foster → Coyote Stone Llc → BLACK RIDGE QUARRY**

- 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:** Coyote Stone Llc → BLACK RIDGE QUARRY; 1999-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darrell Ryce  Foster  et al → BLACK RIDGE QUARRY; 1999-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darrell Ryce  Foster  et al → Coyote Stone Llc; 1999-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale A  Deming  et al → Coyote Stone Llc; 1999-04-01 to current/open; source msha-controller-operator-history