There are 10 lanes in an olympic swimming pool
Typically 10 lanes.
In a normal Olympic Pool there are 10 lanes. I'm not too sure what a semi Olympic pool is!
8 or 6
An Olympic swimming pool usually has 8 lanes, but sometimes has up to 16.
An olympic size swimming pool has 10 lanes however only the middle 8 lanes are used for competition, with the outside two lanes being used to prevent the swimmers' waves bouncing off the walls
to keep the swimmers in there own lanes
An Olympic swimming pool is about 55 yards long and 27 yards wide. There are 10 lanes in an official pool.
The definition of an Olympic size swimming pool is 10 lanes each 2.5 meters wide, however to prevent the outside lanes being disadvantaged by having to compete with the waves bouncing off the sides of the pool only the middle 8 lanes are ever used.
10- 8 for swimming and two outside lanes to keep the backsplash down