# Relationship history for MSHA mine 2300289

Current hierarchy: **Mark  Morris; Randy  Morris → Morris Rock Inc → Morris Rock 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:** Vernon County Crushed Stone Inc → Morris Rock Inc; 1950-01-01 to 1991-03-31; source msha-controller-operator-history
- **controller_controls_mine:** John H  Morris → Morris Rock Inc; 1950-01-01 to 1991-03-31; source msha-controller-operator-history
- **controller_controls_operator:** John H  Morris → Vernon County Crushed Stone Inc; 1950-01-01 to 1991-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Morris Rock Inc → Morris Rock Inc; 1991-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Morris et al → Morris Rock Inc; 1991-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Morris et al → Morris Rock Inc; 1991-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Morris et al → Morris Rock Inc; 1991-04-01 to current/open; source msha-controller-operator-history