Nine of the 20 charges laid against Calypso water park for alleged safety violations in 2011 and 2012 were dropped in court on Thursday.

The company operating the large park east of Ottawa pleaded not guilty in September 2014 to the charges, which were laid by the Technical Standards and Safety Authority.

The case has been winding its way through court ever since.

On Thursday morning, the prosecutor withdrew nine charges due to lack of evidence.

Both sides are now giving their final arguments in court.

Fourteen of the original charges related to three separate incidents in 2011 involving the Steamer water slide and Calypso's alleged failure to report and respond to the incidents.

Three other charges relate to issues involving compliance with safety regulations at the ride Pirate's Aquaplay, and the final three charges relate to an incident in which a man fractured his skull on the Orange Bobsleigh ride on June 19, 2012.