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Summer stream temperatures were measured for four years in six headwater streams before four of the streams were clearcut without buffers according to modern forest practice rules. Stream temperatures were monitored for one additional year following the harvest treatment. Percent cover was sampled along the streams before and following harvest and measurements taken after harvest measured shade provided by understory vegetation and logging debris as well as overstory vegetation. Stream temperatures in the four treatment streams responded variably to treatment as compared to the unharvested control streams. Two streams warmed significantly, one stream cooled significantly, and the fourth stream showed no significant change. Before and after stream cover comparisons that considered only overstory vegetation indicated mean changes in cover ranging from 81 to 94% in treatment streams and 3 to 5% in control streams whereas surveys that incorporated cover from understory vegetation and logging slash quantified mean changes in cover ranging from 17 to 42% in treatment streams and 11 to 15% in control streams.