# Relationship history for MSHA mine 4401715

Current hierarchy: **Hall Luther R & James C Rife → L Hall & J C Rife Coal Company → 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:** Hall Luther R & James C Rife → No 2-Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** May & Dotson Coal Company → No 2-Mine; 1950-01-01 to 1971-08-28; source msha-controller-operator-history
- **controller_controls_mine:** May Henry → No 2-Mine; 1950-01-01 to 1971-08-28; source msha-controller-operator-history
- **controller_controls_operator:** May Henry → May & Dotson Coal Company; 1950-01-01 to 1971-08-28; source msha-controller-operator-history
- **operator_operates_mine:** S & S Coal Company → No 2-Mine; 1971-08-29 to 1972-10-03; source msha-controller-operator-history
- **controller_controls_mine:** Sullivan Charlie & Jackie Harmon → No 2-Mine; 1971-08-29 to 1972-10-03; source msha-controller-operator-history
- **controller_controls_operator:** Sullivan Charlie & Jackie Harmon → S & S Coal Company; 1971-08-29 to 1972-10-03; source msha-controller-operator-history
- **operator_operates_mine:** L Hall & J C Rife Coal Company → No 2-Mine; 1972-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hall Luther R & James C Rife → L Hall & J C Rife Coal Company; 1972-10-04 to current/open; source msha-controller-operator-history