Caribou Air Force Station
Caribou Air Force Station, also known as North River Depot and East Loring, is a defunct Air Force Station that operated from 1951 until some time when it was absorbed into Loring Air Force Base in 1962. It was located in Limestone, Maine, adjacent to Loring. Between 1951 and 1962 Caribou was an Operational Storage Site for Air Materiel Command (AMC-OSS), one of five in the United States, and the weapons storage and maintenance facility for Loring alert aircraft.
Cape Field at Fort Glenn
Along with new airfields on the mainland and Southwest Alaska, new air bases were planned for the air defense of the Aleutians to Dutch Harbor. Construction of the new bases on Umnak and Cold Bay began in January 1942 in secret, with construction reportedly disguised as a cannery. The first United States Army engineers landed at what would become Fort Glenn Army Air Base on 17 January and construction began by the end of the month. A Naval airfield, Otter Point Naval Air Facility was adjacent to the Army Airbase. The 807th Engineering Battalion (Aviation) was brought in from Yukat to perform the construction along with a detachment of the Navy Seabee 8th Construction Battalion.
Plans called for three hard-surfaced runways (four were eventually built), however time was of the essence in the construction of the base, as the air defense of Dutch Harbor was dependent on them. Instead of a hard surface, engineers chose to use a new material, Pierced Steel Planking (PSP), which could be laid down quickly over a compressed gravel subsurface to provide the airfield with an all-weather capability. There were 80,000 pieces of matting which needed to be barged to the island. Construction crews worked in three shifts, 24 hours a day laying down the runways and constructing a rudimentary support station, water and sewer lines, an electrical grid, communications, fuel and munitions storage sites and all the other necessities to convert a remote island site into an operational airfield capable of supporting heavy bombers. A 5,000' PSP runway was completed on 5 April although a C-53 was first plane to land on the field was on 31 March. The main runway was officially opened on 23 May. Fort Glenn's first runway was then the U.S. Army's most westerly airfield in the Aleutian Islands."