Keystone Lake is a reservoir in northeastern Oklahoma on the Arkansas and Cimarron rivers.
 It is located upstream about 23 mi from Tulsa.
 It was created in 1968 when the Keystone Dam was completed.
 The primary purposes are: flood control, hydroelectric power generation, wildlife management and recreation.
Mannford is a city in Creek County in the northeastern part of the U.S. state of Oklahoma.
 In 2010, the population was 3,076, up from 2,095 at the 2000 census.
 The city sits next to Keystone Lake and claims to be the "Striped Bass Capital of the World".
Keystone State Park is a 1200 acre Pennsylvania state park in Derry Township, Westmoreland County, Pennsylvania in the United States.
 The main attraction of the park, which opened in 1945, is the 78 acre Keystone Lake, constructed by the Keystone Coal and Coke Company in the early 1900s.
 The park also has extensive picnic areas and several miles of hiking trails.
 Keystone State Park was named after the Keystone Coal and Coke Company that once occupied the area.
 The park is off U.S. Route 22 near New Alexandria.
Osaka (大阪市 , Ōsaka-shi ) (] ;    ) is a designated city in the Kansai region of Japan.
 It is the capital city of Osaka Prefecture and the largest component of the Keihanshin Metropolitan Area, the second largest metropolitan area in Japan and among the largest in the world with over 19 million inhabitants.
 Situated at the mouth of the Yodo River on Osaka Bay, Osaka is the second largest city in Japan by daytime population after Tokyo's 23 wards and the third largest city by nighttime population after Tokyo's 23 wards and Yokohama, serving as a major economic hub for the country.
Tulsa is the second-largest city in the state of Oklahoma and 47th-most populous city in the United States.
 As of July 2015, the population was 403,505, an increase of 11,599 over that reported in the 2010 Census.
 It is the principal municipality of the Tulsa Metropolitan Area, a region with 981,005 residents in the MSA and 1,151,172 in the CSA.
 The city serves as the county seat of Tulsa County, the most densely populated county in Oklahoma, with urban development extending into Osage, Rogers, and Wagoner counties.
Summit Lake (or Upper Summit Lake) is located on Canyon Creek in the Chugach National Forest, Alaska, United States and is situated along the Seward Highway (AK-1) 10 mi north-northeast of Moose Pass and about 23 miles southwest of the Portage area of Anchorage.
 The lake is fed by Canyon Creek from the southwest and Tenderfoot Creek from the east.
 The lake empties into Canyon Creek on the northeast, which flows through Lower Summit Lake, into Six Mile Creek, and eventually into the Turnagain Arm of the Cook Inlet.
 (However, the lake is not connected with the nearby Summit Creek, which runs about 1 mi from the southwest shore of Summit Lake and whose waters flow southwest from the far side of the summit toward Kenai Lake and Skilak Lake before reaching the Cook Inlet.)
Ross Lake is a large reservoir in the North Cascade mountains of northern Washington state, United States, and southwestern British Columbia, Canada.
 The lake runs approximately north-south, is 23 miles (37 km) long, up to 1.5 miles (2.5 km) wide, and the full reservoir elevation is 1,604 feet above sea level (489 m).
Becharof Lake is a 37 mi long lake on the Alaska Peninsula.
 It is located 23 mi south-east of Egegik, in the Aleutian Range.
 It is the second largest lake in Alaska after Iliamna Lake.
 It ranks eighth on list of largest lakes of the United States by volume and fourteenth on list of largest lakes of the United States by area.
Durant is a city in Bryan County, Oklahoma, United States and serves as the capital of the Choctaw Nation of Oklahoma.
 The population was 15,856 at the 2010 census.
 Durant is the principal city of the Durant Micropolitan Statistical Area, which had a population of 42,416 in 2010.
 Durant ranks as the second largest city within the Choctaw Nation, following McAlester, and ahead of Poteau.
 Durant is also part of the Dallas-Fort Worth Combined Statistical Area, anchoring the northern edge.
Oklahoma City is the capital and largest city of the U.S. state of Oklahoma.
 The county seat of Oklahoma County, the city ranks 27th among United States cities in population.
 The population grew following the 2010 Census, with the population estimated to have increased to 631,346 as of July 2015.
 As of 2015, the Oklahoma City metropolitan area had a population of 1,358,452, and the Oklahoma City-Shawnee Combined Statistical Area had a population of 1,459,758 (Chamber of Commerce) residents, making it Oklahoma's largest metropolitan area.

Question: Keystone Lake is located about 23 miles from the second largest city in the state of Oklahoma, that ranks where in population in the United States?
Answer: 47th-most