# Relationship history for MSHA mine 1515010

Current hierarchy: **Steve  Graves → Campton Processing, LLC → Campton Tipple**

- 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:** James D  Napier → Campton Tipple; 1983-10-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Locust Grove Inc → Campton Tipple; 1984-12-01 to 1988-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Edward L Clemons Estate → Campton Tipple; 1984-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward L Clemons Estate → Locust Grove Inc; 1984-12-01 to 1988-05-03; source msha-controller-operator-history
- **operator_operates_mine:** W M N Coal Inc → Campton Tipple; 1988-05-04 to 1989-11-29; source msha-controller-operator-history
- **controller_controls_operator:** James D  Napier → W M N Coal Inc; 1988-05-04 to 1989-11-29; source msha-controller-operator-history
- **operator_operates_mine:** Locust Grove Inc → Campton Tipple; 1989-11-30 to 1997-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Edward L Clemons Estate → Locust Grove Inc; 1989-11-30 to 1997-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Mary Ann  Kent → Campton Tipple; 1997-01-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Delta Machinery Company Inc → Campton Tipple; 1997-05-23 to 2002-11-12; source msha-controller-operator-history
- **controller_controls_operator:** Mary Ann  Kent → Delta Machinery Company Inc; 1997-05-23 to 2002-11-12; source msha-controller-operator-history
- **operator_operates_mine:** Campton Processing, LLC → Campton Tipple; 2002-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Graves → Campton Tipple; 2002-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Graves → Campton Processing, LLC; 2002-11-13 to current/open; source msha-controller-operator-history