On October 19, 1995, at 1705 eastern daylight time, a Cessna 210C, N36264, was substantially damaged during a landing, at the Burlington International Airport, Burlington, Vermont. The private pilot and one passenger were not injured. Visual meteorological conditions prevailed for the local flight that departed from Burlington about 1600. There was no flight plan for the personal flight conducted under 14 CFR Part 91. The pilot reported that he planned to conduct landings at the Clinton County Airport, Plattsburgh, New York. During the approach at Plattsburgh, the pilot was unable to extend the landing gear. He tried the normal and emergency procedures; however, the main gear would not extend. The nose gear was extended, and the main gear remained retracted. The pilot decided to return to Burlington for an emergency landing. The pilot performed a landing on runway 33, a 7807 foot long and 150 foot wide runway. During the landing, the airplane veered off the left side of the runway. Post accident examination by the Federal Aviation Administration Inspector revealed hydraulic fluid leaking in the vicinity of the forward cabin left side floor, and that a hydraulic line had fractured.