Controller failed to provide intersecting runway separation between an arrival and a departure. The arrival was past the runway threshold before the departure had crossed the landing runway.

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Attributes
ACN	143513
Time
Date	199004
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : srq
State Reference	FL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : srq
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	climbout : takeoff
Flight Plan	VFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	landing other
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar controller : non radar
Experience	controller military : 10 controller radar : 3
ASRS Report	143513
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : ground less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 3800
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft X above was cleared for takeoff on runway 14 while another small aircraft Y was on left base runway 04 for a touch and go. The touch and go turned final and crossed the runway threshold before the departing small aircraft X crossed through the midfield intersection. Traffic was issued to the departure. Pilot reported traffic in sight. I did not send the touch and go around because both aircraft would be airborne at the midfield. The departure took a long time to begin takeoff roll. An immediate departure may have stopped the situation.

Original NASA ASRS Text

Title: CTLR FAILED TO PROVIDE INTERSECTING RWY SEPARATION BETWEEN AN ARR AND A DEP. THE ARR WAS PAST THE RWY THRESHOLD BEFORE THE DEP HAD CROSSED THE LNDG RWY.

Narrative: ACFT X ABOVE WAS CLRED FOR TKOF ON RWY 14 WHILE ANOTHER SMA Y WAS ON LEFT BASE RWY 04 FOR A TOUCH AND GO. THE TOUCH AND GO TURNED FINAL AND CROSSED THE RWY THRESHOLD BEFORE THE DEPARTING SMA X CROSSED THROUGH THE MIDFIELD INTXN. TFC WAS ISSUED TO THE DEP. PLT RPTED TFC IN SIGHT. I DID NOT SEND THE TOUCH AND GO AROUND BECAUSE BOTH ACFT WOULD BE AIRBORNE AT THE MIDFIELD. THE DEP TOOK A LONG TIME TO BEGIN TKOF ROLL. AN IMMEDIATE DEP MAY HAVE STOPPED THE SITUATION.

Data retrieved from NASA's ASRS site as of July 2007 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.