# Relationship history for MSHA mine 4103224

Current hierarchy: **Van C  Cox → Chico Limestone Inc → CHICO LIMESTONE 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

- **controller_controls_mine:** James  Bagsby et al → CHICO LIMESTONE INC; 1984-01-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** North Texas Aggregates Inc → CHICO LIMESTONE INC; 1984-03-01 to 1986-04-22; source msha-controller-operator-history
- **controller_controls_operator:** James  Bagsby et al → North Texas Aggregates Inc; 1984-03-01 to 1986-04-22; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Moreno et al → North Texas Aggregates Inc; 1984-03-01 to 1986-04-22; source msha-controller-operator-history
- **operator_operates_mine:** North Texas Aggregates Inc → CHICO LIMESTONE INC; 1986-04-23 to 1989-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Ford William → CHICO LIMESTONE INC; 1986-04-23 to 1989-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Ford William → North Texas Aggregates Inc; 1986-04-23 to 1989-05-22; source msha-controller-operator-history
- **operator_operates_mine:** Chico Limestone Inc → CHICO LIMESTONE INC; 1989-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Van C  Cox → CHICO LIMESTONE INC; 1989-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Van C  Cox → Chico Limestone Inc; 1989-05-23 to current/open; source msha-controller-operator-history