# Relationship history for MSHA mine 1513840

Current hierarchy: **Meadors Gary & Carl Culver → Cammac Inc → Mine #1**

- 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:** Cammac Inc → Mine #1; 1982-08-01 to 1983-11-19; source msha-controller-operator-history
- **controller_controls_mine:** Meadors Gary & Carl Culver Et Al → Mine #1; 1982-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Meadors Gary & Carl Culver Et Al → Cammac Inc; 1982-08-01 to 1983-11-19; source msha-controller-operator-history
- **operator_operates_mine:** H & W Coal Company → Mine #1; 1983-11-20 to 1984-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Whitehead Joel-David Et Al → Mine #1; 1983-11-20 to 1984-07-18; source msha-controller-operator-history
- **controller_controls_operator:** Whitehead Joel-David Et Al → H & W Coal Company; 1983-11-20 to 1984-07-18; source msha-controller-operator-history
- **operator_operates_mine:** Cammac Inc → Mine #1; 1984-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Meadors Gary & Carl Culver Et Al → Cammac Inc; 1984-07-19 to current/open; source msha-controller-operator-history