What happened
Ground control cleared Cessna 152 N757WV to taxi to runway 6. After relinquishing control to a full-performance controller, who was aware of the aircraft's location and destination, ground control then cleared a tailwheel-equipped Cessna 180 N2913C to taxi to runway 15. Runways 6 and 15 joined at their approach ends, sharing a common run-up area.
Upon entering the run-up area, the C-152 pilot stopped with the aircraft angled northeast and began a run-up. Meanwhile, the C-180 pilot taxied into the same area. Just before impact, the C-180 pilot saw the C-152 and applied brakes but could not stop in time. The propeller of the C-180 struck the empennage of the C-152. The C-180 came to rest nose-down.
Tower tapes indicated no traffic warning was issued by ground control. The C-180 pilot was not wearing required corrective lenses and was overdue for a medical review.