On June 19, 2005, about 0930 eastern daylight time, a Cessna R182, N736TG, was substantially damaged while landing at White Birch Field (4N8), Hancock, New York. The certificated private pilot and passenger sustained minor injuries. Visual meteorological conditions prevailed for the flight that departed Sullivan County International Airport (MSV), Monticello, New York. No flight plan was filed for the personal flight conducted under 14 CFR Part 91. The pilot reported that he selected full flaps for a landing on runway 17; a 1,910-foot-long, 70-foot-wide, wet turf runway. The airplane landed long, and the pilot applied the brakes. The braking action was poor due to wet grass, and the pilot retracted the flaps in an effort to improve braking. However, the airplane traveled off the end of the runway, down an incline, and came to rest inverted. The reported wind at an airport approximately 33 miles northwest of the accident site, at 0953, was from 070 degrees at 6 knots.