GA PLT MAKES EVASIVE MANEUVER AFTER LNDG MAL ARPT DUE TO BARRIER OBSTRUCTIONS ON RWY. PLT DETERMINES ARPT NOTAMS ARE INCOMPLETE.

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THE MALONE-DUFORT ARPT HAS 2 RWYS; 5-23 AND 14-32. RWY 14-32; THE SHORTER OF THE TWO (3245 FT ON THE APCH PLATE); INTERSECTS WITH RWY 5-23 NEAR RWY 14-32'S NW END. IN THE PREFLT BRIEFING FOR THE FLT TO THIS ARPT; THERE WERE 2 DISTANT NOTAMS: RWY 5-23 CLOSED; AND RWY 14 THRESHOLD DISPLACED 900 FT; NON STANDARD MARKINGS. ENRTE A CHK WITH FLT SVC CONFIRMED THAT THESE 2 NOTAMS REMAINED IN EFFECT. IN MY TRAINING AND EXPERIENCE; A DISPLACED THRESHOLD HAD ALWAYS BEEN A LINE PAINTED ON THE RWY. AND THE FULL LENGTH ALWAYS HAD BEEN AVAILABLE FOR LNDG IN THE OPPOSITE DIRECTION (IN THIS CASE; RWY 32); UNLESS OTHERWISE STATED. SURFACE WINDS IN THE AREA WERE RPTED TO BE LIGHT; OUT OF THE NW. BASED ON THE DIRECTION OF OUR APCH; WE ELECTED THE GPS RWY 5 APCH; WITH THE INTENTION OF CIRCLING TO RWY 32. ZBW READ US THE SAME 2 NOTAMS WE HAD ALREADY RECEIVED PREVIOUSLY. NEARING THE ARPT; WE COULD SEE HVY EQUIP -- APPARENTLY PAVING EQUIP -- PARKED ON RWY 5. ACCORDINGLY; AFTER CIRCLING TO RWY 32; I MADE A POINT OF LOOKING UP THE RWY TO VERIFY THAT THE INTXN WAS CLR FOR US TO ROLL THROUGH. THIS INTXN APPEARED CLR. BUT WE NEVER MADE IT TO THE INTXN. ON THE ROLLOUT AFTER TOUCHDOWN; THE RWY 14 'DISPLACED THRESHOLD' WITH THE 'NON STANDARD MARKINGS' SUDDENLY LOOMED AHEAD AS A THREE-DIMENSIONAL OBSTRUCTION TO TFC ON RWY 32! FIRST THERE WAS A LENGTH OF WHITE MATERIAL; ROLLED UP LIKE A CARPET; STRETCHED ACROSS THE FULL 75 FT WIDTH OF THE RWY AND WEIGHED DOWN WITH SANDBAGS. BEHIND THAT WAS A SET OF BARRIERS STRETCHED ACROSS THE RWY; TOPPED WITH YELLOW FLASHERS THAT WERE NOT TURNED ON! THESE MARKINGS; SOME 2300-2400 FT DOWN THE RWY; HAD NOT BEEN NOTICED ON THE FINAL APCH TO OR THE LNDG ON RWY 32. FULL BRAKING; THEN AN INTENTIONAL SWERVE OFF THE RWY ONTO THE GRASS; SAVED THE DAY. THE OUTCOME WAS A CLOSE CALL; WITH NO DAMAGE OR INJURY. I CONTACTED FLT SVC TO HAVE THE NOTAM ABOUT THE 'DISPLACED THRESHOLD' WITH 'NON STANDARD MARKINGS' CORRECTED TO TERMINOLOGY THAT REFLECTED THE ACTUAL SIT; THAT NEITHER THE FIRST 900 FT OF RWY 14 NOR THE LAST 900 FT OF RWY 32 WAS AVAILABLE. THEY CONTACTED THE ARPT MGR TO VERIFY THE INFO AND MY PROPOSED CORRECTION WAS; IN FACT; MADE. THE NEW NOTAM: RWY 14-32 NORTHWEST 900 FEET CLOSED. FROM A PREVIOUS TRIP TO THIS ARPT; I UNDERSTAND THE FIELD IS MANAGED BY SOMEONE OTHER THAN AN AVIATION OFFICIAL. PERHAPS THIS INDIVIDUAL COULD USE SOME REMEDIAL TRAINING IN AVIATION TERMINOLOGY; NOT TO MENTION ARPT SAFETY. AND MAYBE SOME LEVEL OF CERTIFICATION SHOULD BE REQUIRED; IF IT ISN'T ALREADY; FOR ANYONE AUTH TO ISSUE ARPT NOTAMS.