# Relationship history for MSHA mine 4002881

Current hierarchy: **Scott E  Climer; Stephen F  Climer → Climer & Sons Gravel Springs Inc → Climer & Sons Gravel Springs, 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:** Gravel Springs Company Inc → Climer & Sons Gravel Springs, Inc.; 1985-03-01 to 1996-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Clyde  Owen → Climer & Sons Gravel Springs, Inc.; 1985-03-01 to 1996-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Clyde  Owen → Gravel Springs Company Inc; 1985-03-01 to 1996-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Climer & Sons Gravel Springs Inc → Climer & Sons Gravel Springs, Inc.; 1996-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frank  Climer → Climer & Sons Gravel Springs, Inc.; 1996-03-01 to 2013-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Climer → Climer & Sons Gravel Springs Inc; 1996-03-01 to 2013-07-30; source msha-controller-operator-history
- **controller_controls_mine:** Scott E  Climer et al → Climer & Sons Gravel Springs, Inc.; 2013-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott E  Climer et al → Climer & Sons Gravel Springs Inc; 2013-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen F  Climer et al → Climer & Sons Gravel Springs Inc; 2013-07-31 to current/open; source msha-controller-operator-history