B737 LNDG BOI ENCOUNTERS DEBRIS ON RWY WITHOUT ADVISORY FROM ATC.

Narrative

AFTER TOUCHDOWN FROM A VISUAL APCH TO RWY 28R; ON ROLLOUT; BOTH THE CAPT (PLT MONITORING) AND I (PF) NOTICED BLACK MARKS ON THE RWY THAT WERE NOT VISIBLE DURING THE APCH. DURING DECELERATION AS WE GOT CLOSER; THE BLACK MARKS WERE DETERMINED TO BE NUMEROUS CHUNKS OF TIRE ON THE RWY. THE LARGEST CHUNKS (OVER 1 FT IN LENGTH; ESTIMATED) WERE L OF CTRLINE AND SMALLER TIRE SECTIONS WERE SCATTERED ACROSS THE RWY. WE WERE SLOWING THROUGH 100 KTS AND I STOWED THE REVERSERS SO AS NOT TO INGEST FOD AND INCREASED BRAKING PRESSURE; WHILE STEERING SLIGHTLY R OF CTRLINE TO AVOID THE LARGEST TIRE PIECES. TWR WAS AWARE OF THE FOD AND DID NOT WARN US. A GND VEHICLE (TRUCK) WAS WAITING ON AN INTERSECTING TXWY FOR US TO CLR THE RWY SO THEY COULD REMOVE THE DEBRIS. WHY WERE WE NOT WARNED? WE RPTED THE FOD TO TWR. ANOTHER ACFT WAS THEN SUBSEQUENTLY CLRED FOR IMMEDIATE TKOF FROM THAT RWY AS THERE WAS TFC ON SHORT FINAL. TWR DID NOT ACKNOWLEDGE OUR FOD RPT AND THE ACFT DEPARTED THE RWY. WE NOTIFIED GND AND WERE INFORMED THAT A TRUCK WAS ON THE WAY TO INVESTIGATE.