# Relationship history for MSHA mine 4104866

Current hierarchy: **Harvey G Jenkins Estate → Jenkins Sand Co. → Jenkins Sand Co.**

- 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:** Jenkins Sand Co. → Jenkins Sand Co.; 2011-04-05 to 2016-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Harvey G  Jenkins → Jenkins Sand Co.; 2011-04-05 to 2015-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Harvey G  Jenkins → Jenkins Sand Co.; 2011-04-05 to 2015-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Dorothy J  Jenkins → Jenkins Sand Co.; 2015-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dorothy J  Jenkins → Jenkins Sand Co.; 2015-05-17 to 2016-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Jenkins Sand Co. → Jenkins Sand Co.; 2016-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harvey G Jenkins Estate → Jenkins Sand Co.; 2016-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harvey G Jenkins Estate → Jenkins Sand Co.; 2016-03-01 to current/open; source msha-controller-operator-history