# Relationship history for MSHA mine 0200350

Current hierarchy: **Mary Jo  Helmick; Daniel J  Adragna → Decorative Rock Sales LLC → Little Hill 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** LITTLE HILL MINES, INC. → Little Hill Mine; 1950-01-01 to 2003-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Deborah D  McGee → Little Hill Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Deborah D  McGee → LITTLE HILL MINES, INC.; 1950-01-01 to 2003-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Decorative Rock Sales LLC → Little Hill Mine; 2004-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Deborah D  McGee → Little Hill Mine; 2004-01-01 to 2019-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Deborah D  McGee → Decorative Rock Sales LLC; 2004-01-01 to 2019-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Mary Jo  Helmick et al → Little Hill Mine; 2019-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mary Jo  Helmick et al → Decorative Rock Sales LLC; 2019-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel J  Adragna et al → Decorative Rock Sales LLC; 2019-07-30 to current/open; source msha-controller-operator-history