# Relationship history for MSHA mine 4002883

Current hierarchy: **Dever Randall L → D & L Limestone Inc → D & L Limestone Incorporated**

- 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:** B L Johnson Crushed Stone → D & L Limestone Incorporated; 1985-04-01 to 1989-01-23; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Burgess → D & L Limestone Incorporated; 1985-04-01 to 1989-01-23; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Burgess → B L Johnson Crushed Stone; 1985-04-01 to 1989-01-23; source msha-controller-operator-history
- **operator_operates_mine:** Gardner Stone Company → D & L Limestone Incorporated; 1989-01-24 to 1992-04-21; source msha-controller-operator-history
- **controller_controls_mine:** Gardner Sam Lee → D & L Limestone Incorporated; 1989-01-24 to 1992-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Gardner Sam Lee → Gardner Stone Company; 1989-01-24 to 1992-04-21; source msha-controller-operator-history
- **operator_operates_mine:** D & L Limestone Inc → D & L Limestone Incorporated; 1992-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dever Randall L → D & L Limestone Incorporated; 1992-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dever Randall L → D & L Limestone Inc; 1992-04-22 to current/open; source msha-controller-operator-history