Runway numbers

Why do some runways have a T instead of of a L, R, or a C

According to Wikipedia:

Suffixes may also be used to denote special use runways. Airports that have seaplane waterways may chose to denote the waterway on charts with the suffix W; such as Daniel K. Inouye International Airport in Honolulu and Lake Hood Seaplane Base in Anchorage. Small airports that host various forms of air traffic may employ additional suffixes to denote special runway types based on the type of aircraft expected to use them, including STOL aircraft (S), gliders (G), rotorcraft (H), and ultralights (U). Runways that are numbered relative to true north rather than magnetic north will use the suffix T; this is advantageous for certain airfields in the far north such as Thule Air Base.

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Ahh thanks that explains why it’s in the northern Canada

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