Harry Sutton hit 74 not out, Adam Walker 38 not out and Matthew Vokes 35 as Southwick posted 208/6 from their 40 overs.
Mark Broxup then took 5-35 as Southwick bowled Bridges out for just 119 with Sam Taylor top-scoring with 28 for the visitors.
Stephen Goodger was at the game and caught the action.
1. Southwick v Three Bridges III
Action from Southwick v Three Bridges III in Sussex Cricket League Division 8 Central. Picture by Stephen Goodger Photo: Stephen Goodger
2. Southwick v Three Bridges III
Action from Southwick v Three Bridges III in Sussex Cricket League Division 8 Central. Picture by Stephen Goodger Photo: Stephen Goodger
3. Southwick v Three Bridges III
Action from Southwick v Three Bridges III in Sussex Cricket League Division 8 Central. Picture by Stephen Goodger Photo: Stephen Goodger
4. Southwick v Three Bridges III
Action from Southwick v Three Bridges III in Sussex Cricket League Division 8 Central. Picture by Stephen Goodger Photo: Stephen Goodger