# Relationship history for MSHA mine 0800634

Current hierarchy: **Little Robert → Little Rock Mine Inc → Pedro 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:** Monroe Rock Company → Pedro Mine; 1950-01-01 to 1980-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Monroe Leonard → Pedro Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Monroe Leonard → Monroe Rock Company; 1950-01-01 to 1980-11-05; source msha-controller-operator-history
- **operator_operates_mine:** Ocala Pavers Inc → Pedro Mine; 1980-11-06 to 1986-01-29; source msha-controller-operator-history
- **controller_controls_mine:** Heath Nash → Pedro Mine; 1980-11-06 to 1986-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Heath Nash → Ocala Pavers Inc; 1980-11-06 to 1986-01-29; source msha-controller-operator-history
- **operator_operates_mine:** Three Seasons Corp → Pedro Mine; 1986-01-30 to 1989-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Deltona Corp → Pedro Mine; 1986-01-30 to 1989-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Deltona Corp → Three Seasons Corp; 1986-01-30 to 1989-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Little Rock Mine Inc → Pedro Mine; 1989-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Little Robert → Pedro Mine; 1989-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Little Robert → Little Rock Mine Inc; 1989-04-01 to current/open; source msha-controller-operator-history