A B1900 INGESTED SNOW AND OR ICE NEAR THE EDGE OF RWY AFTER LNDG MKG. THE SNOW AND OR ICE DAMAGED THE R PROP AND TRAILING EDGE FLAP.

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WHILE ON APCH TO RWY 32 IN MKG; TWR RPT PREVIOUS BRAKING ACTION RPTS OF POOR ON RWY 32; PREVIOUSLY RPTED BY A BE1900. WE WERE ISSUED MU READINGS ON 27; 28; 28 FOR RWY 32 (POOR). WE WERE ALSO ADVISED OF RVR 6000+ FT AFTER BEING CLRED TO LAND AND A WIND CHK OF 280 DEGS AT 18 KTS GUSTING TO 22 KTS. TOUCHED DOWN APPROX ON CTR (RWY WAS COVERED WITH SNOW) AND APPLIED INPUTS AS NEEDED TO MAINTAIN CTRLINE. WHILE HOLDING FULL CORRECTION; ACFT SLID TOWARDS R-HAND SIDE OF RWY. R-HAND PROP STRUCK WHAT WE BELIEVE TO BE A CHUNK OF ICE NEAR THE SIDE OF THE RWY. WAS ABLE TO BRING AIRPLANE BACK TO CTR AS IT SLOWED. TAXIED BACK TO TERMINAL AND NOTED NO PROBS EXCEPT FLAPS WOULD NOT RETRACT. UPON SHUTDOWN NOTED DAMAGE TO (3) BLADES ON R-HAND PROP AND TO INBOARD FLAP SEGMENT ON R- HAND SIDE. I BELIEVE CONTRIBUTING FACTOR TO BE INACCURATE WINDS AND/OR WIND GUSTS AND WORSE THAN RPTED BRAKING. ALSO FOUND AFTER LNDG THAT THERE WERE SNOWDRIFTS ON RWY WE WERE NOT ADVISED OF. WE WENT OUT WITH ARPT MAINT. FOUND NO DAMAGED RWY LIGHTS; NO ICE; NOTHING; NOT EVEN A SNOW BANK HIGH ENOUGH TO HIT. I BELIEVE THE FLAP WAS DAMAGED BY A BROKEN CHUNK OF PROP BLADE GOING BACK AND HITTING THE FLAP. THE CAPT WAS THE PF. WINDSHEAR WAS ALSO A FACTOR +/-5 KIAS ALL THE WAY DOWN.