After being declared excess on July 21, 1965, Wenatchee Gap Filler Annex P40B was transferred to the FAA on December 14, 1965. The 7.31-acre site is located in Douglas County, eight miles northeast of East Wenatchee on the Badger Mountain road, and a few miles southwest of the town of Waterville, situated on Highway 2 north and east of East Wenatchee.

Site History: The site property was acquired between 1961 - 62, and was used by the Department of the Air Force, Air Defense Command between 1962 and 1965 as an unmanned gap filler radar station, and maintained by off-site personnel.

When acquired, existing on-site structures included a radio building, a propane tank, and electrical service poles with antenna extensions.

At the time of disposal, the following structures and items remained: Gap Filler Building - concrete block building (19` X 39` with offset 19` X 19`4") Sanitary Latrine 5,000 gallon underground Diesel Storage Tank Road, sidewalk and corrugated metal storm drainage pipe 392 foot seven-foot Security Fence Dismantled 70 foot steel tower

All communications equipment was removed prior to disposal of the site to the FAA.

A FUDS site investigation was conducted on September 12, 1988, revealing that the Wenatchee Gap Filler was known at that time as the LOWER BADGER MOUNTAIN SITE and used as an unmanned communications station owned by Motorola Communications and Electronics, and maintained by Central Communications, out of Wenatchee.

Several DOD structures were still on the site at the time the 1988 FUDS report was developed, which include the Gap Filler building, sanitary latrine, concrete sidewalk, storm drainage, and security fence. The Gap Filler building housed Motorola`s communication equipment. The dismantled tower was removed from the site before transfer to the FAA, with remnants of the three tower footings including six one-inch diameter metal bars protruding approximately one to two inches above the ground. No evidence of the 5,000-gallon underground fuel tank remains, which may have been removed along with the communications equipment and tower.