# Relationship history for MSHA mine 1518936

Current hierarchy: **Danny D Mead; Virginia Jenny"  Mead Hicks" → MRM Mining Inc → No. 1**

- 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:** Golden  Sandlin et al → No. 1; 2004-07-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mason Coal, Inc. → No. 1; 2005-11-02 to 2006-10-22; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Minix → No. 1; 2005-11-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Minix → Mason Coal, Inc.; 2005-11-02 to 2006-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Green River Mining Co Inc → No. 1; 2006-10-23 to 2007-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Golden  Sandlin et al → Green River Mining Co Inc; 2006-10-23 to 2007-10-14; source msha-controller-operator-history
- **operator_operates_mine:** MRM Mining Inc → No. 1; 2007-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Minerva Ruth  Mead → No. 1; 2007-10-15 to 2013-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Minerva Ruth  Mead → MRM Mining Inc; 2007-10-15 to 2013-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Virginia  Mead → No. 1; 2013-05-30 to 2021-12-07; source msha-controller-operator-history
- **controller_controls_operator:** Virginia  Mead → MRM Mining Inc; 2013-05-30 to 2021-12-07; source msha-controller-operator-history
- **controller_controls_mine:** Danny D Mead → No. 1; 2021-12-08 to 2023-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Danny D Mead → MRM Mining Inc; 2021-12-08 to 2023-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Virginia Jenny"  Mead Hicks et al" → No. 1; 2023-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Virginia Jenny"  Mead Hicks et al" → MRM Mining Inc; 2023-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Danny D Mead et al → MRM Mining Inc; 2023-10-01 to current/open; source msha-controller-operator-history