Mast 1255849 — Seattle, WA

At 17 m, structure 1255849 is about half of the 36 m average across the 901 structures registered in King County. It is about 39% of the Washington average of 42 m across 3,659 registrations. Among the 3,482 registrations nationwide filed under the same structure-type code (MAST), the average overall height is 53 m, so this one is about 31% of that figure.

The site's filed ground elevation is 90 m, which puts the top of the structure 106 m above mean sea level.

The registration places the structure near Seattle in King County, Washington, at coordinates 47.56239, -122.31214, with the site address filed as "1625 S Columbian Way". King County has 901 FCC-registered antenna structures, the largest count among the 38 Washington counties with registrations, and 587 of them are marked constructed. Washington as a whole has 3,659 registrations, the 26th-largest total among the 50 states and DC.

The tallest other registered structure within about 40 km is Seattle, WA · 1314042, a building antenna at 288 m (granted (not yet constructed)).

Constructed means the owner has notified the FCC that construction is complete, so the registry treats the structure as standing. The FCC issued registration 1255849 on Jan 8, 2026. Nationally, 141,861 of the 197,703 registrations (71.8%) carry the constructed status, including 2,531 in Washington.

The FCC record lists CCATT LLC of Canonsburg, PA as the registered owner, under FCC Registration Number 0023254592. Across the registry it holds 5,007 structure registrations, the 3rd-largest portfolio among the 7,865 owners with two or more. Its most common filed structure-type code is TOWER (1,570 registrations).

The registration cites FAA aeronautical study 2006-ANM-343-OE, the FAA review of the structure's effect on air navigation. Its marking and lighting code, 1, is listed on the FCC registration form as "None".