AN ACR MD-80 HIT A TEMPORARY LIGHT POLE WITH ITS WINGTIP.

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FLT DEPARTED GATE AT AM01. WHILE TAXIING FOR TKOF; GND INFORMED US OF DEP DELAYS AND DIRECTED US TO TAXI INTO KILO RAMP BEHIND 1 ACR AND AHEAD OF ANOTHER. WHILE MANEUVERING TO LEAVE ROOM FOR THE ACFT BEHIND IN A VERY TIGHT SPACE; L WINGTIP CONTACTED A TEMPORARY LIGHT POLE. RETURNED TO GATE FOR INSPECTION AND SIGN-OFF. DAMAGE WAS 4 INCHES LONG; 1.5 INCHES HIGH; AND .25 INCHES DEEP. I SHOULD NOT HAVE ACCEPTED INSTRUCTIONS TO TAXI INTO THE RAMP AREA -- INSUFFICIENT ROOM TO GET 3 ACFT IN THERE. SUPPLEMENTAL INFO FROM ACN 275403: THERE WAS A LIGHT POLE THAT WAS OBVIOUSLY GOING TO BE CLOSE TO OUR L WING AS WE MADE A 180 DEG R TURN INTO OUR FINAL PARKING SPOT. CAPT AND I COMMENTED THAT IT WAS TIGHT QUARTERS; BUT IT DIDN'T LOOK IMPOSSIBLE. AFTER THE LIGHT POLE WAS OUT OF SIGHT ON OUR L; WE BOTH FELT A BUMP OR SHUDDER. WE STOPPED IMMEDIATELY. WE DETERMINED THAT WE HAD PROBABLY RUN OVER A CONSTRUCTION-RELATED HOLE. A FLT ATTENDANT INFORMED US A PAX SAID OUR WINGTIP HIT THE POLE. WE RETURNED TO THE GATE TO HAVE IT INSPECTED THEN WE TAXIED BACK OUT AND CONTINUED THE FLT.