# Relationship history for MSHA mine 3002934

Current hierarchy: **John J  O'Brien; James E  O'Brien Jr → BORU Holdings, LLC → KRIZ FARM GRAVEL MINE**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Town Of Milford Highway Department → KRIZ FARM GRAVEL MINE; 1990-01-01 to 2023-10-01; source msha-controller-operator-history
- **controller_controls_mine:** Town Of Milford-Ny → KRIZ FARM GRAVEL MINE; 1990-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Milford-Ny → Town Of Milford Highway Department; 1990-01-01 to 2023-10-01; source msha-controller-operator-history
- **controller_controls_mine:** Roger R  Heroux → KRIZ FARM GRAVEL MINE; 2019-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James E  O'Brien Jr et al → KRIZ FARM GRAVEL MINE; 2020-11-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Heroux Excavating Inc. → KRIZ FARM GRAVEL MINE; 2023-10-02 to 2026-09-28; source msha-controller-operator-history
- **controller_controls_operator:** Roger R  Heroux → Heroux Excavating Inc.; 2023-10-02 to 2026-09-28; source msha-controller-operator-history
- **operator_operates_mine:** BORU Holdings, LLC → KRIZ FARM GRAVEL MINE; 2026-09-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James E  O'Brien Jr et al → BORU Holdings, LLC; 2026-09-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John J  O'Brien et al → BORU Holdings, LLC; 2026-09-29 to current/open; source msha-controller-operator-history