# Relationship history for MSHA mine 4502948

Current hierarchy: **Clemets Martin & D C R Nordstrom → Western Land & Resources Inc → Old Dominion 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Clemets Martin & D C R Nordstrom Et Al → Old Dominion Mine; 1981-06-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Western Land & Resources Inc → Old Dominion Mine; 1981-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clemets Martin & D C R Nordstrom Et Al → Western Land & Resources Inc; 1981-10-01 to current/open; source msha-controller-operator-history