# Relationship history for MSHA mine 1512542

Current hierarchy: **Infinity Coal Corp → Hickory Hill Development Corp → Pond Creek 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:** Mc Kinley Corp → Pond Creek Mine; 1980-10-01 to 1981-07-12; source msha-controller-operator-history
- **controller_controls_mine:** William M  Deskins et al → Pond Creek Mine; 1980-10-01 to 1984-03-22; source msha-controller-operator-history
- **controller_controls_operator:** William M  Deskins et al → Mc Kinley Corp; 1980-10-01 to 1981-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Grassy Creek Energies Inc → Pond Creek Mine; 1981-07-13 to 1986-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Brent  Coleman et al → Pond Creek Mine; 1981-07-13 to 1986-02-17; source msha-controller-operator-history
- **controller_controls_operator:** Brent  Coleman et al → Grassy Creek Energies Inc; 1981-07-13 to 1986-02-17; source msha-controller-operator-history
- **operator_operates_mine:** Branson Coleman Energies Inc → Pond Creek Mine; 1986-02-18 to 1990-05-28; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Branson → Pond Creek Mine; 1986-02-18 to 1990-05-28; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Branson → Branson Coleman Energies Inc; 1986-02-18 to 1990-05-28; source msha-controller-operator-history
- **controller_controls_mine:** Infinity Coal Corp → Pond Creek Mine; 1989-03-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hickory Hill Development Corp → Pond Creek Mine; 1990-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Infinity Coal Corp → Hickory Hill Development Corp; 1990-05-29 to current/open; source msha-controller-operator-history