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| Topsham Air Force Station | |
|---|---|
| Part of Air Defense Command (ADC) | |
| Coordinates | 43°56′42″N069°57′46″W / 43.94500°N 69.96278°W Coordinates: 43°56′42″N069°57′46″W / 43.94500°N 69.96278°W |
| Type | Air Force Station |
| Site information | |
| Controlled by | |
| Site history | |
| Built | 1957 |
| In use | 1957-1969 |
| Garrison information | |
| Garrison | Bangor Air Defense Sector 36th Air Division |
Topsham Air Force Station is a closed United States Air Force station. It is located 2.1 miles (3.4 km) north of Brunswick, Maine. It was closed in 1969.
Topsham AFS was initially the headquarters of the Air Defense Command Bangor Air Defense Sector (BaADS), which was activated on 8 January 1957.
In 1958 a Semi Automatic Ground Environment (SAGE) Data Center (DC-05) was established at Topsham AFS. The SAGE system was a network linking Air Force (and later FAA) General Surveillance Radar stations into a centralized center for Air Defense, intended to provide early warning and response for a Soviet nuclear attack. A GATR site (R-25) was also constructed at Topsham as part of the 654th Radar Squadron at Brunswick AFS, but was reassigned to the BaADS at Topsham AFS when the 654th RADS was inactivated in 1965.
The BaADS was absorbed by the 36th Air Division, being moved to Topsham from Davis Monthan AFB, Arizona on 1 April 1966. DC-02 with its AN/FSQ-7 computer remained under the 34th AD until it, and the Air Division was inactivated on 30 September 1969 when technology advances allowed the Air Force to shut down many SAGE Data Centers.
With the inactivation of the 36th AD, the station and GATR site were closed. The former Topsham AFS is now an annex of the now-closed Naval Air Station Brunswick. The SAGE DC blockhouse was demolished in August 1985 and is now a recreation field.
Fortuna Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 4.2 miles (6.8 km) west of Fortuna, North Dakota. It was closed in 1979 as a radar station, remaining as a Long-Range Radar (LRR) facility until 1984.
Finley Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 1.5 miles (2.4 km) west-northwest of Finley, North Dakota. It was closed in 1979 by the Air Force, and turned over to the Federal Aviation Administration (FAA).
Thomasville Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 1.9 miles (3.1 km) north-northwest of Thomasville, Alabama. It was closed in 1969.

Tonopah Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 1.1 miles (1.8 km) south of Tonopah, Nevada. It was closed in 1970.

The Bangor Air Defense Sector (BaADS) is an inactive United States Air Force organization. Its last assignment was with the Air Defense Command 26th Air Division, being stationed at Topsham Air Force Station, Maine. It was inactivated on 1 April 1966.

Charleston Air Force Station is a defunct Air Force Station that opened in 1952 and closed in 1980. It was located in Charleston, Maine and is the site of a radar station and other buildings. After closure, it was redeveloped into a juvenile jail for the state of Maine.
Bedford Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 12.7 miles (20.4 km) north of Bedford, Virginia. It was closed in 1975.
Roanoke Rapids Air Force Station was a United States Air Force General Surveillance Radar station. It is 6.1 miles (9.8 km) southwest of Gaston, North Carolina, near the closed Halifax County Airport. It was closed in 1978.

Brunswick Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 2.5 miles (4.0 km) east-southeast of Brunswick, Maine. It was closed in 1965.

Caswell Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 4.3 miles (6.9 km) north of Limestone, Maine. It was closed in 1980.
Dauphin Island Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 1.9 miles (3.1 km) east of Dauphin Island, Alabama, near historic Fort Gaines (Alabama). It was closed in 1980.
Eufaula Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 6.4 miles (10.3 km) west of Eufaula, Alabama. It was closed in 1968.

Custer Air Force Station is a closed United States Air Force General Surveillance Radar and Direction Center station. It is located 5.3 miles (8.5 km) west-northwest of Battle Creek, Michigan. It was closed in 1969.
Finland Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 2.8 miles (4.5 km) north of Finland, Minnesota. It was closed in 1980.
Olathe Air Force Station is a former United States Air Force radar station that was located in Gardner, Kansas. It was located next to Naval Air Station Olathe, now the grounds of New Century AirCenter.

Ajo Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 6.4 miles (10.3 km) northwest of Ajo, Arizona. It was closed in 1969 by the Air Force, and the radar site turned over to the Federal Aviation Administration (FAA).

Mount Lemmon Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 17.2 miles (27.7 km) north-northeast of Tucson, Arizona. It was closed in 1969.
Fort Lee Air Force Station is a former United States Air Force station. It is located 2.9 miles (4.7 km) northwest of Prince George, Virginia. It was closed in 1983 due to budget cuts.
Keno Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 4.6 miles (7.4 km) south-southwest of Keno, Oregon. It was closed in 1979 by the Air Force, and turned over to the Federal Aviation Administration (FAA).
Blaine Air Force Station is a closed United States Air Force General Surveillance Radar station. It is located 5.5 miles (8.9 km) south of Blaine, Washington. It was closed in 1979.
This article incorporates public domain material from the Air Force Historical Research Agency.