Birch Lake is a lake 1.5 mi south of Barnsdall, Oklahoma, Oklahoma, 20 mi southwest of Bartlesville and 30 miles northwest of Tulsa. The drainage area for Birch Lake is 66 mi2. Its area covers 1137 acre (conservation level). The total capacity is: 52800 acre.ft, subdivided into: Conservation 15800 acre.ft, Flood control 39000 acre.ft, and Inactive storage 15840 acre.ft. The lake is formed from Birch Creek, a tributary of Bird Creek. It eventually empties into the Arkansas River. It is 20 mi southwest of Bartlesville, Oklahoma. The lake has largemouth bass, walleye, spotted bass, smallmouth bass, hybrid striped bass, black and white crappie, channel and flathead catfish, and different types of sunfish. The marine law enforcement branch of the Oklahoma Highway Patrol, Troop W, is headquartered at Birch Lake.