# Relationship history for MSHA mine 4403395

Current hierarchy: **Stacy Chuck → Cheyenne Coal Corp → No 2 Mine**

- 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:** Stacy Chuck Et Al → No 2 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Betsy Ann Coal Co → No 2 Mine; 1973-02-01 to 1973-08-10; source msha-controller-operator-history
- **controller_controls_mine:** Betsy Ann Coal Co → No 2 Mine; 1973-02-01 to 1973-08-10; source msha-controller-operator-history
- **controller_controls_operator:** Betsy Ann Coal Co → Betsy Ann Coal Co; 1973-02-01 to 1973-08-10; source msha-controller-operator-history
- **operator_operates_mine:** M G Coal Corp → No 2 Mine; 1973-08-11 to 1973-09-17; source msha-controller-operator-history
- **controller_controls_mine:** Weaver Robert → No 2 Mine; 1973-08-11 to 1973-09-17; source msha-controller-operator-history
- **controller_controls_operator:** Weaver Robert → M G Coal Corp; 1973-08-11 to 1973-09-17; source msha-controller-operator-history
- **operator_operates_mine:** Chester Fletcher Coal Co → No 2 Mine; 1973-09-18 to 1973-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Fletcher Chester Coal Company → No 2 Mine; 1973-09-18 to 1973-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Fletcher Chester Coal Company → Chester Fletcher Coal Co; 1973-09-18 to 1973-10-19; source msha-controller-operator-history
- **operator_operates_mine:** Cheyenne Coal Corp → No 2 Mine; 1973-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stacy Chuck Et Al → Cheyenne Coal Corp; 1973-10-20 to current/open; source msha-controller-operator-history