In June and July of 1984, the USGS conducted a seismic refraction experiment in south-central Alaska in order to develop velocity-depth models along transects (1) in the Chugach Mountains, (2) on the Glenn Highway west of Glenallen, and (3) along the Richardson Highway from Valdez to the Denali Fault. The experiment was part of ongoing investigations designed to characterize deep crustal structure along a transect extending from Valdez in the south to Prudhoe Bay in the north. Full size version of plates available in additional file with the report.