Umiat, 152°08', 69°22', 337 ft. (Aug. 19, 1952).
Umiat, 152°09'30", 69°22'08", 352 ft. (June 24, 26, July 21, 22, 1952).
As shown on [fig. 1] a reconnaissance flight was made from Umiat to Sadlerochit River and return (July 22, 1952).
| 1. Point Barrow | 8. Umiat | |
| 2. Teshekpuk Lake | 9. Lake Schrader-Lake Peters | |
| 3. Topagaruk | 10. Wahoo Lake | |
| 4. Kaolak River | 11. Driftwood | |
| 5. Kaolak | 12. Porcupine Lake | |
| 6. Reconnaissance flight | 13. Chandler Lake | |
| 7. Gavia Lake |
Lake Schrader-Lake Peters
(July 23-Aug. 16, 1952). Longitudes and latitudes taken from map entitled "Preliminary Copy," U. S. Petroleum Reserve No. 4, U. S. Geological Survey, March 1948, scale 1-6900.