(1,219 × 30 m). For the 12-month period ending July 31, 2010, the airport had 55,125 aircraft operations, an average of 151 per day: 76% general aviation, 18% air taxi, 5% scheduled commercial, and <1% military. At that time there were 79 aircraft based at this airport: 95% single-engine, 3% multi-engine, 1% jet, and 1% helicopter. Airlines and destinations Passenger Accidents and incidents In 1979, Downeast Flight 46 crashed on approach to the airport when the pilots descended below the minimum allowable altitude in difficult weather and failed to correct their error. All but 1 on board were killed. Citations Other sources Essential Air Service documents (Docket OST-1997-2784) from the U.S. Department of Transportation: Order 2004-10-16 (October 25, 2004): reselecting Colgan Air, Inc., to provide subsidized Essential Air Service (EAS) at Presque Isle/Houlton, Augusta/Waterville, Bar Harbor and Rockland, Maine, for a two-year period at a combined annual subsidy rate of $4,312,849. Order 2006-8-24 (August 25, 2006): reselecting Colgan Air, Inc., operating as US Airways Express, to provide subsidized essential air service (EAS) at Presque Isle/Houlton, Augusta/Waterville, Bar Harbor, and Rockland, Maine, at a total annual subsidy rate of $4,774,068 ($3,572,592 for Augusta/Waterville, Bar Harbor, and Rockland; $1,201,476 for Presque Isle/Houlton), for the two-year period of November 1, 2006, through October 31, 2008. Order 2008-7-35 (July 31, 2008): selecting Hyannis Air Service, Inc. d/b/a Cape Air (Cape Air) to provide subsidized EAS at Rockland, Maine, at an annual subsidy of $1,522,770, for a two-year period beginning when Cape Air inaugurates full EAS, through the end of the 24th month thereafter. Order 2010-9-28 (September 28, 2010): selecting Hyannis Air Service, Inc., operating as Cape Air, to provide essential air service (EAS) at Augusta/Waterville and Rockland, Maine, for the four-year period from November 1, 2010 to October 31, 2014, for a combined annual subsidy of $2,783,161, and Colgan Air Inc., operating as US Airways Express, to provide EAS at Bar Harbor, Maine, for the two-year period from November 1, 2010 to October 31, 2012, for an annual subsidy of $2,298,533. External links Knox County Regional Airport at Knox County website Aerial image as of May 1996 from USGS The National Map Airports in Maine Buildings and structures in Rockland, Maine Essential Air Service Transportation buildings and structures in Knox County, Maine