# Relationship history for MSHA mine 0801108

Current hierarchy: **Smith Shirl W → M K S Investors Inc → Cocoa 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:** Coquina Ventures Inc → Cocoa Pit; 1988-07-01 to 1990-01-01; source msha-controller-operator-history
- **controller_controls_mine:** Smith Shirl W → Cocoa Pit; 1988-07-01 to 1990-01-01; source msha-controller-operator-history
- **controller_controls_operator:** Smith Shirl W → Coquina Ventures Inc; 1988-07-01 to 1990-01-01; source msha-controller-operator-history
- **operator_operates_mine:** Brevard Sand & Stone Inc → Cocoa Pit; 1990-01-02 to 1990-05-23; source msha-controller-operator-history
- **controller_controls_mine:** Sullivan J D → Cocoa Pit; 1990-01-02 to 1990-05-23; source msha-controller-operator-history
- **controller_controls_operator:** Sullivan J D → Brevard Sand & Stone Inc; 1990-01-02 to 1990-05-23; source msha-controller-operator-history
- **operator_operates_mine:** M K S Investors Inc → Cocoa Pit; 1990-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Smith Shirl W → Cocoa Pit; 1990-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Shirl W → M K S Investors Inc; 1990-05-24 to current/open; source msha-controller-operator-history