Mast 1225947 — Mariottsville, MD

At 124 m, structure 1225947 is about 73% above the 72 m average across the 57 structures registered in Carroll County. It is about 78% above the Maryland average of 70 m across 1,911 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 2.3 times that figure.

The supporting structure itself measures 117 m; antennas and other appurtenances on top bring the overall height above ground to 124 m. The site's filed ground elevation is 199 m, which puts the top of the structure 323 m above mean sea level.

The registration places the structure near Mariottsville in Carroll County, Maryland, at coordinates 39.37317, -76.89858, with the site address filed as "7299 RIDGE ROAD". Carroll County has 57 FCC-registered antenna structures, the 12th-largest count among the 24 Maryland counties with registrations, and 36 of them are marked constructed. Maryland as a whole has 1,911 registrations, the 33rd-largest total among the 50 states and DC.

The tallest other registered structure within about 40 km is Baltimore, MD · 1044237, a guyed tower at 390 m (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 1225947 on Nov 23, 2009. Nationally, 141,898 of the 197,833 registrations (71.7%) carry the constructed status, including 1,312 in Maryland.

The FCC record lists UNITED STATES OF AMERICA, US ARMY CORPS OF ENGINEERS of Annapolis Junction, MD as the registered owner, under FCC Registration Number 0006142491.

The registration cites FAA aeronautical study 2009-AEA-730-OE and FAA Advisory Circular 70/7460-1K, the FAA review of the structure's effect on air navigation. Its marking and lighting code, 7, is listed on the FCC registration form as "FAA Style E". The painting and lighting specification on file cites FAA chapters 4, 8, 12.