# Relationship history for MSHA mine 0502340

Current hierarchy: **EMSU LLC → Nuvemco LLC → Monogram 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:** Taminco Inc → Monogram Mine; 1950-01-01 to 1980-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Robert → Monogram Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Robert → Taminco Inc; 1950-01-01 to 1980-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Durfee Fred → Monogram Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Durfee Mining Company → Monogram Mine; 1980-04-01 to 1980-05-26; source msha-controller-operator-history
- **controller_controls_operator:** Durfee Fred → Durfee Mining Company; 1980-04-01 to 1980-05-26; source msha-controller-operator-history
- **operator_operates_mine:** Ira C Jones → Monogram Mine; 1980-05-27 to 2007-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Jones Ira C → Monogram Mine; 1980-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Ira C → Ira C Jones; 1980-05-27 to 2007-04-19; source msha-controller-operator-history
- **operator_operates_mine:** Nuvemco LLC → Monogram Mine; 2007-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** EMSU LLC et al → Monogram Mine; 2007-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** EMSU LLC et al → Nuvemco LLC; 2007-04-20 to current/open; source msha-controller-operator-history