A LNDG B737-300 INADVERTENTLY USES THE CLOSED PORTION OF RWY 4L AT LIT. APCH CTLR AND TWR CTLR DID NOT ADVISE CREW OF THE CLOSED 800 FT AT THE END. THE RWY CONFIGN HAD BEEN NOTAMED BUT THE FLC MISSED THAT IN THEIR FLT PLANNING. ATIS DID NOT CARRY THIS INFO EITHER.

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I WAS SCHEDULED TO START MY 4 LEG PM FLYING DAY IN ST LOUIS. EVERYTHING WAS UNEVENTFUL PRIOR TO ARRIVING AT THE GATE WHERE WE WERE INFORMED THE ACFT WOULD BE 25 MINS LATE. AS THE PNF (FOR THIS LEG -- STL TO LIT) AND FO; I REVIEWED THE WX AND RELEASE. UPON DSCNT INTO LIT; I COPIED THE ATIS WHICH DID NOT MENTION THAT THE NE 800 FT OF RWY 4L/22R WAS CLOSED. APCH CTL TOLD US TO EXPECT A VISUAL APCH TO RWY 4R. WE REQUESTED AND RECEIVED A VISUAL APCH TO RWY 4L. NO MENTION WAS MADE BY APCH CTL OF THE SHORTENED RWY STATUS. SUBSEQUENTLY; WE WERE GIVEN CLRNC TO LAND RWY 4L BY LIT TWR AND AGAIN NO MENTION WAS MADE OF THE SHORTENED RWY STATUS. THE WX WAS CLR WITH 10 MI VISIBILITY. THE CAPT LANDED THE ACFT FLAPS 30 DEGS; ON SPD AT APPROX 1000 FT USING REGULAR PROCS; REVERSE THRUST TO 80 KTS BEFORE BRAKING. MY ATTN WAS DIVIDED BTWN THE RWY EXIT AT TXWY J AND THE AIRSPD INDICATOR; AS IT IS MY JOB TO CALL OUT 80 KTS TO THE CAPT TO REDUCE REVERSE AND BEGIN NORMAL BRAKING. IT BECAME OBVIOUS A SHORT TIME LATER THAT THE CAPT WAS NOT GOING TO EXIT AT TXWY J; SO I SHIFTED MY FOCUS DOWN THE RWY TO THE DEP END. AT THIS TIME I NOTICED SOMETHING ON THE RWY; AT THE SAME TIME THE CAPT BEGAN BRAKING HARDER. THERE WERE 5 SANDBAGS EVENLY SPACED ACROSS THE WIDTH OF THE RWY. I WOULD ESTIMATE WE WERE DOING ABOUT 30 KTS WHEN TWR ADVISED US WE WERE ABOUT TO ENTER A CLOSED PORTION OF THE RWY. THE CAPT STEERED BTWN THE SANDBAGS AND ENTERED THE CLOSED PORTION AT APPROX 15 KTS GND SPD; DID A 180 DEG TURN; AND EXITED AT THE POINT WHICH WE HAD ENTERED. TAXI TO THE GATE WAS UNEVENTFUL. THE CAPT DID AN EXTERIOR INSPECTION AND NOTED NOTHING UNUSUAL. THIS ENTIRE CHAIN OF EVENTS OCCURRED BECAUSE A SINGLE NOTAM AMONGST ALL THOSE IN THE WX PACKAGE WAS NOT NOTICED. SOMETHING AS IMPORTANT AS THE PRIMARY TURBOJET RWY BEING SHORTENED (ESPECIALLY A RELATIVELY SHORT RWY TO BEGIN WITH) SHOULD BE IN THE ATIS; AND MENTIONED BY BOTH APCH CTL AND TWR WHEN ASSIGNING IT FOR THE APCH AND LNDG. NONE OF THOSE ACTIONS OCCURRED. FINALLY; USING 5 SANDBAGS TO INDICATE A RWY CLOSURE IS NOT VISUALLY ADEQUATE. THE RWY LOOKED PERFECTLY USEABLE UNTIL VERY LATE IN THE LNDG ROLLOUT. SUPPLEMENTAL INFO FROM ACN 409613: THE DEST METAR WAS MISSING AND I SPENT A LITTLE TIME TRYING TO FIND IT IN THE PACKAGE BEFORE I SHOWED IT TO THE OPS AGENT AND REQUESTED CURRENT WX WHICH HE LATER PROVIDED. UNFORTUNATELY I MISSED THE NOTAM ON THE SECOND PAGE OF THE WX PACKAGE. THE SYS WAS VERY INTOLERANT OF THAT SIMPLE ERROR. THERE WERE THREE MORE OPPORTUNITIES THAT COULD HAVE ALERTED ME TO THE RWY SHORTENING AND THEY WEREN'T THERE: THE ATIS CONTAINED NO MENTION OF IT; THE APCH CTLR WHEN HE CLRED ME FOR THE VISUAL DID NOT SAY ANYTHING ABOUT IT; AND THE TWR CTLR MADE NO MENTION WHEN HE CLRED ME TO LAND.