# Relationship history for MSHA mine 1509794

Current hierarchy: **Ford Winston Jr & Bradford Runyon Sr → Ford & Runyon Coal Company → No 1-M Surface 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

- **operator_operates_mine:** Mountain Mining Contracting Inc → No 1-M Surface Mine; 1976-06-01 to 1977-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Openshaw James A → No 1-M Surface Mine; 1976-06-01 to 1977-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Openshaw James A → Mountain Mining Contracting Inc; 1976-06-01 to 1977-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Viking Mines Inc → No 1-M Surface Mine; 1977-06-01 to 1983-09-07; source msha-controller-operator-history
- **controller_controls_mine:** Austin J  McGinn → No 1-M Surface Mine; 1977-06-01 to 1983-09-07; source msha-controller-operator-history
- **controller_controls_operator:** Austin J  McGinn → Viking Mines Inc; 1977-06-01 to 1983-09-07; source msha-controller-operator-history
- **operator_operates_mine:** Ford & Runyon Coal Company → No 1-M Surface Mine; 1983-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ford Winston Jr & Bradford Runyon Sr → No 1-M Surface Mine; 1983-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ford Winston Jr & Bradford Runyon Sr → Ford & Runyon Coal Company; 1983-09-08 to current/open; source msha-controller-operator-history