On October 30, 1993, at 0703 mountain standard time, a Cessna 170B, N2451D, swerved off the runway and collided with a ditch during landing at Prescott, Arizona. The aircraft was owned and operated by the pilot and was engaged in local traffic pattern practice operation. Visual meteorological conditions prevailed at the time and no flight plan was filed. The aircraft incurred substantial damage. The certificated private pilot, the sole occupant, was not injured. The flight originated at the Prescott airport on the day of the mishap at about 0700 hours. According to the pilot's written statement, he planned a full stop landing on runway 21L. The aircraft bounced on landing and veered left off the runway into the dirt area next to the pavement. The pilot reported that he attempted to initiate a go around by applying full power; however, the aircraft did not attain sufficient flying speed prior to the aircraft encountering a ditch.