# Relationship history for MSHA mine 4002926

Current hierarchy: **Jonathan D  Graves → Perry Decatur Gravel Co. Inc. → Perry Decatur Gravel Co. Inc.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Perry County Gravel Company → Perry Decatur Gravel Co. Inc.; 1986-05-01 to 1990-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Danny L  Lomax → Perry Decatur Gravel Co. Inc.; 1986-05-01 to 1990-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Danny L  Lomax → Perry County Gravel Company; 1986-05-01 to 1990-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Perry Decatur Gravel Co. Inc. → Perry Decatur Gravel Co. Inc.; 1990-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Danny L Graves → Perry Decatur Gravel Co. Inc.; 1990-04-01 to 2013-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Danny L Graves → Perry Decatur Gravel Co. Inc.; 1990-04-01 to 2013-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Jonathan D  Graves → Perry Decatur Gravel Co. Inc.; 2013-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jonathan D  Graves → Perry Decatur Gravel Co. Inc.; 2013-06-18 to current/open; source msha-controller-operator-history