# Relationship history for MSHA mine 1507737

Current hierarchy: **M Lynn  Parrish → Jaco Mining Company Inc → Colley Elkhorn No 1**

- 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:** Colly Elkhorn Coal Corp → Colley Elkhorn No 1; 1974-01-03 to 1975-12-21; source msha-controller-operator-history
- **controller_controls_mine:** Charles B  Hall  et al → Colley Elkhorn No 1; 1974-01-03 to 1975-12-21; source msha-controller-operator-history
- **controller_controls_operator:** Charles B  Hall  et al → Colly Elkhorn Coal Corp; 1974-01-03 to 1975-12-21; source msha-controller-operator-history
- **operator_operates_mine:** Colly Elkhorn Coal Corp → Colley Elkhorn No 1; 1975-12-22 to 1984-08-21; source msha-controller-operator-history
- **controller_controls_mine:** Hall Juda--Raymond & Judd Duncil → Colley Elkhorn No 1; 1975-12-22 to 1984-08-21; source msha-controller-operator-history
- **controller_controls_operator:** Hall Juda--Raymond & Judd Duncil → Colly Elkhorn Coal Corp; 1975-12-22 to 1984-08-21; source msha-controller-operator-history
- **controller_controls_mine:** M Lynn  Parrish → Colley Elkhorn No 1; 1979-09-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jaco Mining Company Inc → Colley Elkhorn No 1; 1984-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** M Lynn  Parrish → Jaco Mining Company Inc; 1984-08-22 to current/open; source msha-controller-operator-history