Dfw tower controller reported a runway incursion with two arrivals on the same runway.

Attributes
ACN	1630631
Time
Date	201903
Local Time Of Day	0601-1200
Place
Locale Reference	DFW.Airport
State Reference	TX
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Landing
Route In Use	None
Flight Plan	IFR
Aircraft 2
Make Model Name	A321
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Other Instrument Approach
Flight Plan	IFR
Person 1
Function	Local
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 12
Events
Anomaly	ATC Issue All Types Conflict Ground Conflict Less Severe Deviation - Procedural Published Material / Policy Ground Incursion Runway

Narrative:

I had just opened local east 1 at the start of the day shift. I was briefed on closures which included taxiways M3; M4; M5; el between runway 17R and runway 17C and M between M3 and M5. I cleared aircraft X to land on runway 17C and advised him of the taxiway closures and asked that he plan to exit at M6. I then cleared aircraft Y to land and advised them to plan the same exit. On landing; aircraft X advised that M6 was coned off and not usable. I sent aircraft Y around ; but noticing that they may have touched down and seeing that enough of aircraft X appeared to be on the un-coned portion of M6; advised aircraft Y to disregard. Aircraft Y did go around. Dfw airport authority said that M6 was closed and they just forgot to tell us.

Original NASA ASRS Text

Title: DFW Tower Controller reported a runway incursion with two arrivals on the same runway.

Narrative: I had just opened Local East 1 at the start of the day shift. I was briefed on closures which included taxiways M3; M4; M5; EL between RWY 17R and RWY 17C and M between M3 and M5. I cleared Aircraft X to land on Runway 17C and advised him of the taxiway closures and asked that he plan to exit at M6. I then cleared Aircraft Y to land and advised them to plan the same exit. On landing; Aircraft X advised that M6 was coned off and not usable. I sent Aircraft Y around ; but noticing that they may have touched down and seeing that enough of Aircraft X appeared to be on the un-coned portion of M6; advised Aircraft Y to disregard. Aircraft Y did go around. DFW Airport Authority said that M6 was closed and they just forgot to tell us.

Data retrieved from NASA's ASRS site 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.