Tower supervisor described a flawed landing/take off event when clearing an arrival to land 8 miles ...

Narrative:

Aircraft X was 8 miles to the southwest when they checked in; I told them to make right traffic to 19R and cleared to land. Approximately 7-8 minutes went by when aircraft Y called ready at 19R for departure. I issued runway heading and cleared him for take off. Aircraft X executed a go around from approximately 1/4 mile final and 300 ft AGL. Aircraft Y was still holding short of the runway and never crossed the hold short line. Aircraft X was issued right traffic to runway 19R. Aircraft Y then requested another take off clearance which I issued. Aircraft X landed without incident and aircraft Y departed the airspace. I feel that this event happened because I cleared aircraft X to land 8 miles out that I displaced him from my memory. My scan of the final was not as through as it could have been; along with not looking at my traffic pad. I will be more vigilant of my final and scan my traffic pad for every arrival and departure. From now on; I will wait to give the landing clearance to aircraft on downwind so i'm not inclined to displace them from my memory.

Original NASA ASRS Text

Title: Tower Supervisor described a flawed landing/take off event when clearing an arrival to land 8 miles out and then failing to remember the aircraft when clearing a departure for take off resulting in a go around.

Narrative: Aircraft X was 8 miles to the southwest when they checked in; I told them to make right traffic to 19R and cleared to land. Approximately 7-8 minutes went by when aircraft Y called ready at 19R for departure. I issued runway heading and cleared him for take off. Aircraft X executed a go around from approximately 1/4 mile final and 300 FT AGL. Aircraft Y was still holding short of the runway and never crossed the hold short line. Aircraft X was issued right traffic to Runway 19R. Aircraft Y then requested another take off clearance which I issued. Aircraft X landed without incident and aircraft Y departed the airspace. I feel that this event happened because I cleared Aircraft X to land 8 miles out that I displaced him from my memory. My scan of the final was not as through as it could have been; along with not looking at my traffic pad. I will be more vigilant of my final and scan my traffic pad for every arrival and departure. From now on; I will wait to give the landing clearance to aircraft on downwind so i'm not inclined to displace them from my memory.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1014996
Time
Date	201206
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Cessna 152
Flight Phase	Final Approach
Route In Use	Visual Approach
Aircraft 2
Make Model Name	Cessna 152
Flight Phase	Taxi
Route In Use	None
Person 1
Function	Supervisor / CIC
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Conflict Ground Conflict Less Severe Deviation - Procedural Published Material / Policy

Tower supervisor described a flawed landing/take off event when clearing an arrival to land 8 miles out and then failing to remember the aircraft when clearing a departure for take off resulting in a go around.