EMB 145 FLT CREW MISSES A CROSSING RESTRICTION ON ARRIVAL TO DCA. CHART CONFUSION IS CITED AS A CONTRIBUTING FACTOR.

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THE CAPT WAS THE PF. WE WERE CLRED TO DSND VIA THE ELDEE 3 ARR INTO DCA. AFTER LEVELING OFF AT 9000 FT JUST BEFORE REACHING DARIC; I INQUIRED WITH POTOMAC APCH ABOUT THE ROUTING I WAS TO FLY AND ALSO THE SPD RESTR; OR RATHER LACK THEREOF; AFTER PASSING ELDEE. WE WERE EXPECTING RWY 1. THE CTLR CONFIRMED THAT AFTER ELDEE OUR NEXT FIX WOULD BE DMALL AND THE 210 KTS RESTR WOULD NOT APPLY. JUST PRIOR TO REACHING ELDEE; THE CTLR ADVISED US THAT WE WERE SUPPOSED TO BE AT 8000 FT BY ELDEE. WE WERE STILL AT 9000 FT. I QUICKLY DSNDED TO 8000 FT; HOWEVER; THE XING WAS MISSED. I APOLOGIZED AND EXPLAINED TO THE CTLR THAT THE NOTE FOR ELDEE AT 8000 FT SAYS; 'LNDG RONALD REAGAN WASHINGTON NATL (RWY 19)' AND THAT'S WHY I DID NOT DSND AS I WAS TOLD TO EXPECT RWY 1. I MADE THE ASSUMPTION THAT THE ENTIRE BALLOON REFING ALT AND SPDS AT ELDEE WOULD NOT APPLY AND ASSUMED I HAD CONFIRMATION OF THIS. OBVIOUSLY; I WAS WRONG. THE NOTE FOR THE ELDEE INTXN SHOULD BE RECONFIGURED TO INDICATE THAT THE 8000 FT MANDATORY ALT APPLIES TO ALL RWYS AT DCA; WHILE THE 210 KTS SPD RESTR IS ONLY APPLICABLE TO ACFT EXPECTING RWY 19. AFTER HAVING MADE THIS MISTAKE I CAN SEE THE DISTINCTION BTWN THE XING ALT AND THE NOTE ON THE AIRSPD FOR RWY 19. HOWEVER; I FEEL FOR FUTURE PLTS COMING IN ON THE ELDEE 3 ARR IT WOULD BE NICE TO HAVE NO AMBIGUITY ON WHETHER A XING RESTR APPLIES TO ALL RWYS OR JUST RWY 19.