# Relationship history for MSHA mine 5002080

Current hierarchy: **Cap  Shafer; Cam  Shafer; Brok  Shafer → Dibble Creek Rock Ltd. → Portable Plant #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

- **controller_controls_mine:** Brok  Shafer et al → Portable Plant #2; 2011-09-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dibble Creek Rock Ltd. → Portable Plant #2; 2022-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brok  Shafer et al → Dibble Creek Rock Ltd.; 2022-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cam  Shafer et al → Dibble Creek Rock Ltd.; 2022-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cap  Shafer et al → Dibble Creek Rock Ltd.; 2022-06-28 to current/open; source msha-controller-operator-history