Central Region Core Research Center Administration
| Township: | 146N | Range: | 99W | Section: | 21 | 
| Quarter: | NENW | County: | MCKENZIE | State: | ND | 
| API Number: | 3305301069 | Operator: | PENNZOIL COMPANY | Well Name: | 21-21 GRASSY BUTTES FEDERAL | 
| Latitude: | 47.456189 | Longitude: | -103.303306 | Coordinate Source: | FROM STATE RECORDS | 
| Minimum Depth: | 3890 | Maximum Depth: | 14100 | Security Flag: |