PLT FLYING A RYAN ST3KR HAS A LOSS OF CTL ON LNDG ROLL AND HEADS TOWARD CULVERT. TO AVOID HITTING THE CULVERT HEAD ON HE INTENTIONALLY GND LOOPS THE ACFT. L WING HITS CULVERT.

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ON ROLLOUT FROM A 3 POINT LNDG AND ABOUT 10-15 MPH THE ACFT STARTED TO MAKE AN ARC TO THE R. AS I DEPRESSED THE L RUDDER/BRAKE THE ARC TIGHTENED TO THE R. TO AVOID HITTING THE CULVERT WALL HEAD ON AND POSSIBLY TIPPING OVER INTO THE DRAINAGE DITCH; I STEPPED VERY HARD ON THE R BRAKE TO GND LOOP AND STOP. ALL WENT WELL UNTIL THE L WING STRUCK THE CULVERT WALL AFTER ABOUT A 190 DEG TURN. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES HE DOES BELIEVE THE CULVERT AND ALSO A DITCH AT THE APCH END OF RWY 20 ARE TOO CLOSE TO THE RWY AND COULD EASILY BE MOVED FURTHER AWAY TO AVOID PROBS IF A LNDG GOES BAD. BUT THE BOTTOM LINE IS THAT HIS ACFT WAS PROBABLY THE PROB. HE BELIEVES THAT THE L WHEEL IS TOED IN JUST A BIT. HE DISCUSSED THIS WITH MEMBERS OF THE RYAN GROUP HE BELONGS TO AND NO ONE REALLY SEEMED TO THINK IT A PROB. 2 OTHER PERSONS WHO FLEW HIS ACFT MENTIONED A PULL ON LNDG. RPTR HAS PREVIOUSLY USED A GND LOOP TO SOLVE A LNDG PROB AND FEELS IT IS USUALLY A GOOD PROC; BUT THIS TIME THE CULVERT WAS IN THE WAY AND IT DID NOT WORK OUT SO WELL. IN TALKING TO THE ARPT PERSONNEL HE HAS LEARNED THAT 7 ACFT HAVE GONE INTO THE CULVERT OVER MANY YRS' TIME. THE ACFT IS CURRENTLY BEING TORN DOWN AND REBUILT.