# Relationship history for MSHA mine 4104412

Current hierarchy: **Jessica  Canfield; Zech  Canfield → CANFIELD MATERIALS LLC. → Canfield Materials LLC.**

- 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:** Rattler Rock Inc. → Canfield Materials LLC.; 2003-04-01 to 2025-03-09; source msha-controller-operator-history
- **controller_controls_mine:** Charles L  Davis → Canfield Materials LLC.; 2003-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles L  Davis → Rattler Rock Inc.; 2003-04-01 to 2025-03-09; source msha-controller-operator-history
- **operator_operates_mine:** CANFIELD MATERIALS LLC. → Canfield Materials LLC.; 2025-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jessica  Canfield et al → Canfield Materials LLC.; 2025-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jessica  Canfield et al → CANFIELD MATERIALS LLC.; 2025-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zech  Canfield et al → CANFIELD MATERIALS LLC.; 2025-03-10 to current/open; source msha-controller-operator-history