# Relationship history for MSHA mine 3401325

Current hierarchy: **Kay County-OK → Kay County → KAY PITS**

- 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

- **controller_controls_mine:** Robert L  Childress et al → KAY PITS; 1950-01-01 to 2019-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Quapaw Company → KAY PITS; 1981-07-01 to 1984-11-27; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Childress et al → Quapaw Company; 1981-07-01 to 1984-11-27; source msha-controller-operator-history
- **controller_controls_operator:** Donald B  Childress et al → Quapaw Company; 1981-07-01 to 1984-11-27; source msha-controller-operator-history
- **operator_operates_mine:** North Central Ready-Mix → KAY PITS; 1984-11-28 to 1988-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Coffelt D L → KAY PITS; 1984-11-28 to 1988-10-05; source msha-controller-operator-history
- **controller_controls_operator:** Coffelt D L → North Central Ready-Mix; 1984-11-28 to 1988-10-05; source msha-controller-operator-history
- **operator_operates_mine:** North Central Ready Mix Company → KAY PITS; 1988-10-06 to 2000-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Koppers Company Inc → KAY PITS; 1988-10-06 to 2000-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Koppers Company Inc → North Central Ready Mix Company; 1988-10-06 to 2000-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Kay County → KAY PITS; 2000-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kay County-OK → KAY PITS; 2000-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kay County-OK → Kay County; 2000-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert L  Childress et al → KAY PITS; 2019-08-01 to 2020-06-25; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Childress et al → Quapaw Company; 2019-08-01 to 1984-11-27; source msha-controller-operator-history
- **controller_controls_operator:** Tommy  Kiser et al → Quapaw Company; 2019-08-01 to 1984-11-27; source msha-controller-operator-history
- **controller_controls_mine:** Dolese Brothers Company → KAY PITS; 2020-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dolese Brothers Company → Quapaw Company; 2020-06-26 to 1984-11-27; source msha-controller-operator-history