# Relationship history for MSHA mine 2602257

Current hierarchy: **Rafael  Flores; Kayla  Gutches → K & R Gravel, LLC → Shamrock Pit**

- 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

- **operator_operates_mine:** Floyd's Construction Inc → Shamrock Pit; 1994-08-01 to 2023-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Ronald B  Floyd → Shamrock Pit; 1994-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald B  Floyd → Floyd's Construction Inc; 1994-08-01 to 2023-02-27; source msha-controller-operator-history
- **operator_operates_mine:** K & R Gravel, LLC → Shamrock Pit; 2023-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rafael  Flores et al → Shamrock Pit; 2023-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rafael  Flores et al → K & R Gravel, LLC; 2023-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kayla  Gutches et al → K & R Gravel, LLC; 2023-02-28 to current/open; source msha-controller-operator-history