The 92.9 FM frequency covered central Balclutha, while the 93.7 FM frequency could be heard throughout the South Otago and Northern Southland area (including Gore).
[1] The station was first started in 1992 as way of rebroadcasting Dunedin's 4XO to the Balclutha region as the hilly geographic location of the township means Dunedin radio stations can not be picked up clearly in Balclutha.
The station was initially limited to just a local show on Saturday mornings from a client's premises but after a permanent studio was built the station extended local programming to 7am - 12pm weekdays with 4XO relayed outside these times.
In 2004 RadioWorks rebranded most of its local stations as More FM but Big River Radio was not affected by this change.
Previous award-winning breakfast host Brad Jeffrey left the station in November 2010 to take on the role of Operations Manager and 10-2 host at Times FM in Orewa, before returning to the station in November 2013.