This is what my daughter says:
Compare River with B98.5 (as a representative example). Not only is the HAAT of River a lot higher, the HAGL is too. Note that River's HAAT is LOWER than its HAGL. Being in the foothills, the HAAT of the tower is skewed "downward" by the nearby mountains "behind" it. Moving downhill away from the foothills towards town (or into SC, for that matter), the tower "appears" taller than going uphill into the mountains. FM coverage is driven by line of sight, and 1726' looking downhill is pretty tall.
From Radio-Locator:
WSRV-FM Technical Info:
Station Status Licensed Class C FM Station
Area of Coverage View Coverage Map
Effective Radiated Power 98,000 Watts
Height above Avg. Terrain 483 meters (1585 feet)
Height above Ground Level 526 meters (1726 feet)
Height above Sea Level 797 meters (2615 feet)
Antenna Pattern Non-Directional
Transmitter Location 34° 07' 32" N, 83° 51' 32" W
WSB-FM Technical Info:
Station Status Licensed Class C0 FM Station
Area of Coverage View Coverage Map
Effective Radiated Power 100,000 Watts
Height above Avg. Terrain 313 meters (1027 feet)
Height above Ground Level 292 meters (958 feet)
Height above Sea Level 594 meters (1949 feet)
Antenna Pattern Non-Directional
Transmitter Location 33° 45' 33" N, 84° 20' 05" W
WKHX-FM Technical Info:
Station Status Licensed Class C0 FM Station
Area of Coverage View Coverage Map
Effective Radiated Power 100,000 Watts
Height above Avg. Terrain 329 meters (1079 feet)
Height above Ground Level 348 meters (1142 feet)
Height above Sea Level 612 meters (2008 feet)
Antenna Pattern Non-Directional
Transmitter Location 33° 48' 26" N, 84° 20' 22" W
WWWQ-FM Technical Info:
Station Status Licensed Class C0 FM Station
Area of Coverage View Coverage Map
Effective Radiated Power 96,600 Watts
Height above Avg. Terrain 340 meters (1115 feet)
Height above Ground Level 348 meters (1142 feet)
Height above Sea Level 612 meters (2008 feet)
Antenna Pattern Non-Directional
Transmitter Location 33° 48' 26" N, 84° 20' 22" W
WVEE-FM Technical Info:
Station Status Licensed Class C0 FM Station
Area of Coverage View Coverage Map
Effective Radiated Power 100,000 Watts
Height above Avg. Terrain 310 meters (1017 feet)
Height above Ground Level 292 meters (958 feet)
Height above Sea Level 594 meters (1949 feet)
Antenna Pattern Non-Directional
WSTR-FM Technical Info:
Station Status Licensed Class C0 FM Station
Area of Coverage View Coverage Map
Effective Radiated Power 100,000 Watts
Height above Avg. Terrain 310.4 meters (1018 feet)
Height above Ground Level 292 meters (958 feet)
Height above Sea Level 593.8 meters (1948 feet)
Antenna Pattern Non-Directional
Transmitter Location 33° 45' 33" N, 84° 20' 05" W
WUBL-FM Technical Info:
Station Status Licensed Class C1 FM Station
Area of Coverage View Coverage Map
Effective Radiated Power 99,000 Watts
Height above Avg. Terrain 298 meters (978 feet)
Height above Ground Level 314 meters (1030 feet)
Height above Sea Level 581 meters (1906 feet)
Antenna Pattern Non-Directional
Transmitter Location 33° 48' 27" N, 84° 20' 27" W
WKLS-FM Technical Info:
Station Status Licensed Class C0 FM Station
Area of Coverage View Coverage Map
Effective Radiated Power 99,000 Watts
Height above Avg. Terrain 300 meters (984 feet)
Height above Ground Level 315 meters (1033 feet)
Height above Sea Level 581 meters (1906 feet)
Antenna Pattern Non-Directional
Transmitter Location 33° 48' 27" N, 84° 20' 26" W