AN ACR MLG PLT COMPLAINS ABOUT A SLICK RWY AT CHS.

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I FLEW A NORMAL ILS TO RWY 15 AT CHS IN VISUAL CONDITIONS. ATIS RPTED 800 OVCST LIGHT RAIN AND DRIZZLE; 7 MI VISIBILITY. NO MENTION OF SLICK RWYS. WINDS 120 DEGS AT 6 KTS. OUR COMPANY FLT PLAN REMARKS SAID RWYS 15 AND 21 ARE SLICK WHEN WET; SO I BRIEFED A 40 DEG FLAPS (FULL) AND MINIMUM ON AUTOBRAKES AS A PRECAUTION. SMOOTH TOUCHDOWN IN TOUCHDOWN ZONE (NEXT TIME I'LL MAKE A FIRM TOUCHDOWN). I BEGAN MANUAL BRAKING AT 100 KIAS. AROUND 50 KIAS; I FELT NO BRAKE DECELERATION; CHKED BRAKE PRESSURE OK; AND APPLIED MAX BRAKES. STILL NO BRAKING; SO I ASKED THE CAPT TO 'HELP ME WITH THE WHEEL BRAKES.' THIS WAS NEAR TXWY ALPHA. I RE-ENGAGED REVERSE THRUST; WHICH SLOWED US DOWN. WE SLOWED TO TAXI SPD WITH 200 TO 300 FT OF RWY REMAINING. WE CHKED THE WHEEL BRAKES AFTER CLRING; AND THEY CHKED OK. TIRES WERE NEW TO GOOD; WITH LOTS OF TREAD. LOTS OF RUBBER ON RWYS. WE CALLED TWR AND RPTED BRAKING ACTION AS 'NIL.' WE THEN CALLED GND AND RPTED THIS TO THEM; AND THEY SAID THE POOR BRAKING WAS 'NORMAL FOR THAT RWY WHEN IT IS WET.' THE CAPT CALLED ARPT MGMNT ON THE PHONE AND ASKED FOR A BRAKING ACTION RPT WITH A DECELEROMETER; WHICH WAS NOT DONE. AFTER SOLICITING BRAKING RPTS FROM OTHER ACFT (TWR DIDN'T SEEM VERY INTERESTED IN OUR NIL BRAKING RPT). WE GOT RPTS FROM FAIR TO POOR. WE DEPARTED ON RWY 21 (WHICH HAS A VERY ROUGH AND BUMPY SURFACE). WE DIDN'T THINK WE COULD ABORT A RWY 15 TKOF AND STAY ON THE RWY. THIS IS A SERIOUS SAFETY HAZARD. THE POTENTIAL FOR RUNNING OFF THE END OF RWY 15 (AND PROBABLY OTHER RWYS) IS REAL. A GROOVED CLEAN RWY WOULD HELP.