Date: 201701
Local time of day: 0601-1200
Location: LFT.Tower, LA
Flight conditions: VMC
Light: Daylight
Aircraft: Small Aircraft; High Wing; 1 Eng; Fixed Gear
Operator: Personal
Operating under: Part 91
Flight plan: VFR
Mission: Personal
Flight phase: Taxi
ATC / advisory: Tower LFT
Second aircraft: Small Aircraft; High Wing; 1 Eng; Fixed Gear
Reporter organization: Government
Reporter function: Ground; Supervisor / CIC; Flight Data / Clearance Delivery
Reporter qualification: Air Traffic Control Fully Certified
Human factors: Situational Awareness; Training / Qualification; Communication Breakdown; Distraction
Second reporter function: Local
Anomaly: ATC Issue All Types; Conflict Ground Conflict; Less Severe; Deviation / Discrepancy - Procedural Clearance
Detector: Person Air Traffic Control
When detected: Taxi
Result: Air Traffic Control Issued New Clearance; Air Traffic Control Issued Advisory / Alert; Flight Crew Rejected Takeoff
Contributing factors: Procedure; Airport; Human Factors
Primary problem: Procedure

Narrative: I was working Ground Control; Flight Data; Clearance Delivery combined along with being assigned Controller in Charge. Runways 4R and 4L were active. Significant portions of the airport surface are under construction; including Runway 11/29; Taxiway J north of Taxiway B; and TWY L between Runway 04R/04L. Aircraft X called requesting 'taxi to active at Taxiway B'. It took me several transmissions to determine which runway and intersection he was requesting including a request to depart Runway 04L at Taxiway L; which is closed. Eventually I issued taxi instructions to Runway 4R at B; via Taxiway F and Taxiway B.Aircraft Y had previously been issued taxi instructions to Runway 4L via F; Cross Runway 11. As Aircraft X approached the intersection of Taxiway B and Runway 4L; he did not appear to be slowing down. I brought this to the Local Controller's attention; and; at least mentally; planned to coordinate a crossing. I believe I coordinated the crossing; and told Aircraft X to cross Runway 4R at B. As I observed Aircraft X cross the hold short line; but prior to entering the runway; I observed Aircraft Y on Takeoff Roll on Runway 4L. I said something along the lines of 'Stop him' to Local Control and told Aircraft X to hold position. Aircraft Y exited Runway 4L at Runway 11; taxied back to Runway 4L full length; and departed without incident on Local Control frequency.I instructed Aircraft X to continue taxi and cross Runway 4L. He departed Runway 4R at B and remained in the pattern. After the incident was resolved; in conversation with Local Control; Local Control did not recall authorizing me a runway crossing. I believe I had coordinated; on the recorded line; for the crossing. However; with another aircraft calling me at the time for clearance and taxi; I may have mentally thought about getting the crossing and then convinced myself I had gotten it. We are unable to access the DALR (Audio recording) to verify the exact coordination because no member of management was present in the building today.I will ensure that I do no issue a crossing until I witness the Local Controller properly utilize the Runway Incursion Prevention Device (RIPD) currently required at our facility. I will also; independently of facility requirements; use a personal memory aid consisting of a strip holder with Runway 4L/22R written on it. It will be face up when I have coordinated a crossing; and face down when no crossings have been coordinated. I would also recommend that LFT develop a procedure to allow controller's access to the DALR when management is not present. This is the first facility I've been at where controllers are unable to access the DALR for playback when management is not in the building.


Second narrative: Aircraft Y was holding short of Runway 4L. I saw Aircraft X holding short Runway 4L at B. Aircraft Y called Local Control ready to go. I released Aircraft Y for takeoff on Runway 4L. As I watched Aircraft Y takeoff I was thinking I should change him to runway heading because of on aircraft going to the right on 2-3 mile final. I heard Ground Control tell me to cancel takeoff clearance so I told Aircraft Y cancel takeoff clearance as he was rolling. Aircraft X crossed the hold short lines for Runway 4L but I do not believe he made it to the runway before the cancel takeoff clearance was given. Aircraft X turned left on Runway 11 then a left on F to return to the approach end of Runway 4L to depart again.I do not remember ground control requesting permission to cross the Runway 4L at B. Even after everything was over; I still thought I never gave permission to cross. After checking the tapes; right after giving take off clearance to Aircraft Y; ground control requested to cross and I gave the crossing. It has nothing to do with memory aids or procedures because I thought I never gave the crossing.


Synopsis: LFT Tower controllers reported a ground conflict when an aircraft began crossing Runway 4L while an aircraft was taking off.