# Relationship history for MSHA mine 3000995

Current hierarchy: **Farmingdale Sand Inc; C Browman Transportation Corp → 110 Sand Company → Broad Hollow Estates Inc**

- 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:** Broad Hollow Estates Inc → Broad Hollow Estates Inc; 1950-01-01 to 1983-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Henry  Behr → Broad Hollow Estates Inc; 1950-01-01 to 1983-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Henry  Behr → Broad Hollow Estates Inc; 1950-01-01 to 1983-05-25; source msha-controller-operator-history
- **operator_operates_mine:** Broad Hollow Estates Inc → Broad Hollow Estates Inc; 1983-05-26 to 1984-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Milton A  Hendrickson  et al → Broad Hollow Estates Inc; 1983-05-26 to 1984-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Milton A  Hendrickson  et al → Broad Hollow Estates Inc; 1983-05-26 to 1984-03-20; source msha-controller-operator-history
- **operator_operates_mine:** 110 Sand Company → Broad Hollow Estates Inc; 1984-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** C Browman Transportation Corp → Broad Hollow Estates Inc; 1984-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C Browman Transportation Corp → 110 Sand Company; 1984-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Farmingdale Sand Inc et al → 110 Sand Company; 1984-03-21 to current/open; source msha-controller-operator-history