RedactedNarrative: On 06/19/2018 at approximately 1618 hours on Lake Pleasant, a PWC operated by operator2 made a hard left turn in front of a PWC operated by operator1.  Operator1 was unable to slow or turn his PWC in time to avoid a collision with Operator2.  Operator1''s PWC struck Operator2''s PWC on the left side center.  The impact knocked Operator2 off his PWC into the lake and caused a compound fracture of his lower left leg.  He was loaded onto Peoria Fire''s Rescue boat and later transported by ground ambulance to Deer Valley Hospital for treatment.