ACR MLG STOPPED IN ITS TAXIING DUE TO ENCOUNTERING AN OBSTRUCTION NOT VISIBLE UNCHARTED UNLIGHTED UNMARKED. NIGHT OP.

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CAPT TAXIED ACFT CLR OF RWY 35L FOLLOWING MY LNDG. WE EXITED ON L2. ANOTHER ACFT LANDED SBOUND ON SAME RWY 17R SHORTLY AFTER WE CLRED. WE HAD RECEIVED ATIS; NO MENTION OF CLOSED TXWYS. FLT PAPERS AND NOTAMS ALSO MADE NO MENTION OF CLOSED TXWYS; AND 'CHART NOTAMS' IN SECTION OF OUR MANUAL ALSO MADE NO MENTION OF CLOSED TXWYS. GND CTLR WAS WORKING SIMULTANEOUS FREQS (TWR; GND; E SIDE; W SIDE). GND INSTRUCTED US TO TAXI N ON L; GIVE WAY TO A LCL ACFT; THEN PROCEED TO GATE. WE RECEIVED THE CLRNC AT INTXN OF EK AND L2. IN FACT; TXWY L WAS CLOSED BTWN TXWY EJ AND Z FOR REPAIRS; AND WAS BARRICADED WITH PLASTIC CONES WHICH WERE UNLIT. I HAD SWITCHED TO COMPANY FREQ TO CONFIRM GATE. CAPT HAD TURNED OFF TAXI LIGHT TO KEEP FROM BLINDING APCHING ACFT ON TXWY K AND ON SHORT FINAL RWY 17R. AS I RETURNED TO ATC FREQ; I NOTICED APCHING ROW OF CONES. CAPT SAW THEM AT SAME TIME AND SHOPPED THE ACFT ABOUT 10 FT PAST THE BARRICADE. WE COORDINATED WITH GND CTL; WHO SENT OUT AN OPS TRUCK TO REMOVE CONES BLOCKING TXWY KS FROM TXWY K; ALLOWING US TO PROCEED UNEVENTFULLY TO THE GATE. NO DAMAGE TO CONES OR ACFT. CAUSE AND PREVENTION: PERHAPS TAXI LIGHT SHOULD HAVE BEEN LEFT ON; AND I SHOULD NOT HAVE LEFT ATC SO SOON. ATIS SHOULD HAVE NOTIFIED US OF THE TEMPORARY CLOSURE. FLT PAPERWORK SHOULD ALSO HAVE MENTIONED CLOSURE IN 'FIELD CONDITIONS' RPT.