RWY EXCURSION IN A PA-28-180.

Narrative

IN JULY; AFTER A SHORT PLEASURE FLT IN CHEROKEE 180 WITH 3 PAX; I WAS RETURNING TO COX-GRANTHAM ARPT; A PVT ARPT WITH A 2800 FT GRASS LNDG STRIP. RAINFALL IN EXCESS OF 14 INCHES DURING THE MONTH OF JUNE HAD RESULTED IN THE GRASS BEING UNCUT AND SEVERAL LOW SPOTS HOLDING WATER. I LANDED LONG TO AVOID STANDING WATER AND IMMEDIATELY ON TOUCHDOWN ACFT BEGAN HYDROPLANING. I CUT PWR AND APPLIED BRAKES WITH NO RESPONSE. ACFT SEEMED TO GAIN; RATHER THAN LOSE SPD. AT THE END OF RWY ACFT HAD NOT LOST ENOUGH SPD TO BRING IT TO A STOP. APPROX 50 FT BEYOND END OF RWY IS A 3 FT DEEP DITCH; 4 FT EMBANKMENT AND MAJOR HIGHWAY (AT R ANGLE TO RWY). A UTILITY POLE AND UTILITY WIRES ARE AT THE EDGE OF THE HIGHWAY. BECAUSE OF PAX LOAD; FUEL ON BOARD; AIR TEMP AND HUMIDITY I DID NOT BELIEVE I COULD SUCCESSFULLY MAKE A GAR. I CHOSE TO TRY TO AVOID ENTERING THE HIGHWAY BY TURNING THE ACFT TO THE R AND ATTEMPT TO STOP THE ACFT BY STRIKING THE R WING AGAINST THE UTILITY POLE. AS THE WING STRUCK THE POLE; THE ACFT SPUN 180 DEGS AND CAME TO A HALT WITH THE L WINGTIP ABOUT 1 FT FROM THE SHOULDER OF THE HIGHWAY. THERE WAS NO INJURY TO MYSELF OR ANY PAX; NO PROP STRIKE; NO FUEL TANK RUPTURE; R WING WAS DAMAGED BUT REMAINED ATTACHED TO THE FUSELAGE.