# Relationship history for MSHA mine 2601524

Current hierarchy: **Keith  Jones → Small Mine Development, LLC → Diamond Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Diamond Mines Corp → Diamond Mine; 1979-01-01 to 1980-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Erickson Einar C → Diamond Mine; 1979-01-01 to 1980-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Erickson Einar C → Diamond Mines Corp; 1979-01-01 to 1980-06-22; source msha-controller-operator-history
- **operator_operates_mine:** Diamond Treasure Hill Inc → Diamond Mine; 1980-06-23 to 2015-08-20; source msha-controller-operator-history
- **controller_controls_mine:** Spitler Robert → Diamond Mine; 1980-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Spitler Robert → Diamond Treasure Hill Inc; 1980-06-23 to 2015-08-20; source msha-controller-operator-history
- **controller_controls_mine:** Ronald W  Guill → Diamond Mine; 1988-04-01 to 2011-01-27; source msha-controller-operator-history
- **controller_controls_mine:** Keith  Jones → Diamond Mine; 2011-01-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Small Mine Development, LLC → Diamond Mine; 2015-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Jones → Small Mine Development, LLC; 2015-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald W  Guill → Small Mine Development, LLC; 2015-08-21 to 2011-01-27; source msha-controller-operator-history