PIPER PLT ENTERS CLASS C AIRSPACE WITHOUT A HDOF FROM TRACON TO TWR WHICH REPORTEDLY RESULTS IN AN NMAC AND A WRONG RWY LNDG.

Narrative

I WAS WORKING LCL CTL. I NOTICED ACFT X; A PA28; ENTERING MY AIRSPACE FROM THE SW. I CALLED OUT TO THE ACFT WITH NO RESPONSE. I CALLED THE N90 SECTOR TO HAVE THEM SEND THE ACFT OVER. WHEN THE ACFT CALLED IT WAS ON A CLOSE IN L BASE. I TOLD THE ACFT TO JOIN DOWNWIND. ACFT X ASKED ME TO TURN UP THE LIGHTS; I TOLD HIM THERE WERE OTHER ACFT ON FINAL AHEAD OF HIM; JOIN THE DOWNWIND AND I WOULD CALL HIS SEQUENCE. I NOTICED THE ACFT CONTINUING TO DSND AND STILL ON A BASE HEADING. I TOLD ACFT X TO GO AROUND AND TO CLB IMMEDIATELY. I PUT ACFT X ON A 020 DEG HDG AND CLBED HIM TO 1500 FT. HE MISSED A CL60; ACFT Y; BY MY ESTIMATE LESS THAN 100 FT VERTLY AND HORIZLY. I HAVE NEVER SEEN 2 ACFT IN SUCH CLOSE PROX. ACFT X RETURNED FOR LNDG; SAID HE HAD FIELD IN SIGHT. I CLRED HIM TO LAND ON RWY 34 AND HE LANDED ON RWY 29. I ALLOWED THAT TO OCCUR JUST TO GET ACFT X SAFELY ON THE GND. ATCT MGMNT TALKED TO THE PLT OF ACFT X. MGMNT DID NOT LOG THE INCIDENT; DID NOT CALL THE REGIONAL COMS CTR; DID NOT FILL OUT PAPERWORK CONCERNING NEAR MIDAIR; PLTDEV OR ANY INCIDENT RPTING FORMS. THE SUPVR TOLD ME THAT HE TOLD ACFT X THAT HE WOULD HAVE TO WAIT TO SEE IF ACFT Y CALLS TO SEE IF ANY FURTHER ACTION WOULD BE TAKEN.