# Relationship history for MSHA mine 5001914

Current hierarchy: **Cap  Shafer; Cam  Shafer; Brok  Shafer → Dibble Creek Rock Ltd. → RD&S**

- 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:** Herb  Downs → RD&S; 2000-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Deep Creek Sand & Gravel → RD&S; 2009-07-16 to 2011-09-25; source msha-controller-operator-history
- **controller_controls_operator:** Herb  Downs → Deep Creek Sand & Gravel; 2009-07-16 to 2011-09-25; source msha-controller-operator-history
- **operator_operates_mine:** Dibble Creek Rock Ltd. → RD&S; 2011-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cam  Shafer et al → RD&S; 2011-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cam  Shafer et al → Dibble Creek Rock Ltd.; 2011-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brok  Shafer et al → Dibble Creek Rock Ltd.; 2011-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cap  Shafer et al → Dibble Creek Rock Ltd.; 2011-09-26 to current/open; source msha-controller-operator-history