L. M. Clayton Airport is a public airport three miles east of Wolf Point, in Roosevelt County, Montana, United States. The airport is served by one airline, subsidized by the Essential Air Service program. Reportedly, it is the smallest airport in the 48 contiguous states with scheduled air service. The Federal Aviation Administration says this airport had 321 passenger boardings (enplanements) in calendar year 2008, 900 in 2009 and 494 in 2010. The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a general aviation airport (the commercial service category requires at least 2,500 enplanements per year). Scheduled air service temporarily ceased on March 8, 2008, when Big Sky Airlines ended operations in bankruptcy. Great Lakes Airlines was given USDOT approval to take over Essential Air Service (EAS) and flights began in 2009. Service is currently provided under EAS contract by Cape Air. The first airline flights were Frontier DC-3s in 1954–55; Frontier pulled out in 1980. Facilities L. M. Clayton Airport covers 290 acres (117 ha) at an elevation of 1,989 feet (606 m). Its one runway, 11/29, is 5,091 by 100 feet (1,552 x 30 m) asphalt. In 2011 the airport had 5,975 aircraft operations, average 16 per day: 53% general aviation, 47% air taxi, and <1% military. Eight aircraft were then based at the airport, all with five or less engines. Airline and destination Statistics References Other sources Essential Air Service documents (Docket DOT-OST-1997-2605) from the U.S. Department of Transportation: Order 2005-12-20 (December 30, 2005): selecting Big Sky Transportation Co., d/b/a Big Sky Airlines, to continue providing essential air service at seven Montana communities (Glasgow, Glendive, Havre, Lewistown, Miles City, Sidney, and Wolf Point) for a new two-year period beginning March 1, 2006, at a subsidy of $6,838,934 annually. Order 2007-11-21 (November 26, 2007): selecting Big Sky Transportation Co., d/b/a Big Sky Airlines, to continue providing essential air service at seven Montana communities for a new two-year period beginning March 1, 2008, at a subsidy of $8,473,617 annually. Order 2007-12-22 (December 21, 2007): allowing Big Sky Transportation Co., d/b/a Big Sky Airlines, to suspend its subsidized essential air services at seven Montana communities on the date that Great Lakes Aviation, Ltd., begins replacement service, and selecting Great Lakes to provide those services at subsidy rates totaling $8,201,992. Order 2011-1-27 (February 2, 2011): selecting Gulfstream International Airlines, to provide subsidized essential air service (EAS) with 19-passenger