Globemaster (C-17)
Air Traffic Control Developmental
Communication Breakdown; Situational Awareness
ATC Issue All Types
General None Reported / Taken
Procedure; Airspace Structure; Human Factors
A C17 departed RIV on the SKYES 1 departure. This procedure is built to fly right over an often used jump zone. When the C17 departed I looked to see where the jump aircraft was; and I noticed that they were at their jump altitude and heading towards the jump zone. I then determined that the jumpers would be down and not a factor for the C17. I had some lower altitude aircraft that I was vectoring around the jump zone; and when I was done; I had the C17 contact LA ARTCC. I then noticed that the jump aircraft had not dropped the jumpers earlier; but instead was dropping them now; and the C17 was in close proximity. I ask the jump aircraft if they had dropped the jumpers; and they said they had; and had the 'heavy' in sight and started a descent. In the future; I need to ensure that the jump aircraft is clear of the jump zone if I am going to leave an aircraft on the SKYES 1 on the departure. If the jump zone will not be clear; I will vector off of the SKYES 1 to clear the jump zone.
SCT Controller described a potential conflict event between IFR traffic assigned the SKYES 1 SID from RIV and parachute operations in the departure path; the reporter acknowledging the need to vector aircraft clear of the jump zone if required.