# Relationship history for MSHA mine 4300263

Current hierarchy: **James A Harrison; Janet  Harrison → MORRISVILLE SAND & GRAVEL, LLC → MORRISVILLE SAND & GRAVEL, LLC**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** H A Manosh Corp → MORRISVILLE SAND & GRAVEL, LLC; 1950-01-01 to 2017-09-10; source msha-controller-operator-history
- **controller_controls_mine:** Howard A  Manosh → MORRISVILLE SAND & GRAVEL, LLC; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Howard A  Manosh → H A Manosh Corp; 1950-01-01 to 2017-09-10; source msha-controller-operator-history
- **operator_operates_mine:** MORRISVILLE SAND & GRAVEL, LLC → MORRISVILLE SAND & GRAVEL, LLC; 2017-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James A Harrison et al → MORRISVILLE SAND & GRAVEL, LLC; 2017-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A Harrison et al → MORRISVILLE SAND & GRAVEL, LLC; 2017-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Janet  Harrison et al → MORRISVILLE SAND & GRAVEL, LLC; 2017-09-11 to current/open; source msha-controller-operator-history