A C210'S LNDG GEAR WOULD NOT EXTEND. THE MAIN GEAR WENT DOWN AFTER POURING WATER IN THE HYD RESERVOIR. WHILE TROUBLESHOOTING THE NOSE GEAR THE ACFT IMPACTED THE GND.

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I WAS APCHING ZZZ FOR A FUEL STOP. AS I PREPARED TO LAND AND EXTENDED THE GEAR HANDLE THE GEAR DID NOT COME DOWN AND THE CIRCUIT BREAKER POPPED OUT. I FLEW A SHORT DISTANCE N OF THE ARPT WHERE THERE WAS FLAT DESERT LAND AND NO RESIDENCES IN CASE I HAD TO MAKE AN OFF-ARPT LNDG. I STARTED THE EMER EXTENSION PROC BUT IT WAS UNSUCCESSFUL. FEARING A POSSIBLE HYD FLUID LEAK I ASKED THE PAX TO POUR SOME WATER INTO THE NECK OF THE RESERVOIR IN HOPES THAT THE GEAR WOULD COME DOWN. THE MAINS CAME DOWN BUT WERE NOT ALL THE WAY LOCKED. MORE WATER WAS PLACED INTO THE RESERVOIR. THE MAIN GEAR LOCKED DOWN AND I CONTINUED TO PUMP THE EMER GEAR EXTENSION HANDLE. THE HANDLE FROZE UP AND WOULD NOT MOVE UP AND DOWN FREELY AND WHILE I WAS LOOKING UNDER BENEATH THE HANDLE TO SEE WHY I BECAME DISTR AND THE ACFT IMPACTED THE GND. LUCKILY THERE WAS VIRTUALLY NO DAMAGE OTHER THAN TO THE NOSE GEAR AND A PROP STRIKE. THERE WAS NO DAMAGE TO THE MAIN LNDG GEAR AND; DUE TO THE FLAT SANDY TERRAIN THERE WAS NO DAMAGE TO THE FUSELAGE OR OTHER STRUCTURAL COMPONENTS OF THE AIRPLANE EXCEPT SOME DENTS AND SCRATCHES IN THE COWL. THERE WAS NO INJURY TO MYSELF OR MY 1 PAX NOT EVEN SCRATCHES OR BRUISES.