On Friday, September 10, 1993, at approximately 1545 eastern daylight time (edt), a Cessna 170B, N4473B, owned and operated by Gerald and Genevee Broshar of Anderson, Indiana, went off the runway and collided with a parked Piper PA-28, N6947J, as the Cessna pilot was landing at the Kentucky Dam State Park Airport, Gilbertsville, Kentucky. Both airplanes were substantially damaged. The passenger was seriously injured with a broken arm, but the pilot received no significant injury. Visual meteorological conditions prevailed. No flight plan was filed, nor was one required. The flight was conducted in accordance with 14 CFR 91. The purpose of the flight was for the pilot and passenger to go to a Cessna 170 fly-in. During a landing on runway 27, the airplane encountered a crosswind from the north and began to drift to the left. It then angled off the left side of the runway, crossed a parallel taxiway, and subsequently collided with a parked aircraft on a parking ramp. The parked aircraft was about 330 ft from the runway. During impact, the propeller of the Cessna 170 contacted the left wing of the Piper PA-28. The left wing of the Piper was severed just outboard of the landing gear and was destroyed. The propeller of the Cessna was severly damaged with nicks and gouges along the leading edges of the blades. The engine cowling of the Cessna was damaged around the lower circumference of the engine. Also, the underside of the Cessna's left wing tip and aileron were damaged. This damage matched marks on the runway surface, where the left wing appeared to have made contact. The pilot reported that when he was ready to flare for a landing on runway 27, a crosswind from the north blew the airplane to the left. He also noted that there were trees along the north side of the runway. At Paducah, Kentucky, the 1550 EDT weather was in part: 1500 feet scattered, 7 miles visibility, wind from 350 degrees at 11 kts, temperature 76 degrees, dew point 47 degrees, altimiter 30.11" Hg. No pre-accident mechanical problem of the Cessna 170 was evident.