Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 1
Situational Awareness; Communication Breakdown
ATC Issue All Types; Conflict Airborne Conflict; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Separated Traffic
Human Factors
Working Local Control position on an 8R/17 configuration. Arrival from the southeast Aircraft Y is direct the field descending to 050 on a northwest heading inbound for the visual to 8R. Aircraft X is taxiing for takeoff on Runway 17 first fix PMM which is a southwestern heading. I call down and coordinate with the Radar Controller asking if he would like me to put Aircraft X straight out (runway heading) or turn him right direct PMM which is outside of my departure gate; he tells me to leave him straight out. I clear Aircraft X for takeoff Runway 17 climbing to 040. About 30 seconds later the Radar Controller APREQs (Approval Request) a right downwind for Aircraft Y; and I approve the request since I had just coordinated a departure rolling off of Runway 17 and he is aware of that departure climbing to 040 via the SOP. I then re-coordinate asking the Radar Controller if he would like me to put the departure on a heading (240). I am told that he will not put Aircraft Y in front of my departure. Aircraft X is in the takeoff roll and I notice on the D-BRITE (Tower radar device) that Aircraft Y is in a westbound turn now for the downwind. As soon as Aircraft X was airborne I called that traffic (Aircraft Y) and he reported the aircraft in sight. I then told Aircraft X to maintain visual separation from Aircraft Y and climb maintain 040 and contact Departure; Aircraft X read-back the clearance. After the event I learned that Aircraft Y also had Aircraft X in sight. But both aircraft responded to a TCAS RA (Resolution Advisory).More precise communication between local and radar could have been used. Also once I saw the situation developing more I could have verified previous coordination with radar.
Grand Rapids Tower Controller reported a loss of separation due to poor coordination.