Small dams and impoundments are ubiquitous in stream networks in the northeastern and north central US.  Concerns about their effects on stream fish population connectivity and their risks to human infrastructure and safety have prompted efforts to remove many of these dams.  Dams also have  potentially significant impacts on stream thermal regimes, and as a consequence their removal may either ameliorate or exacerbate effects of increasing air temperatures.  Also, given their ubiquity, temperature modeling and monitoring efforts need to account for the effects of small impoundments for assessment and prediction. From the results of the first two seasons of field work, it appears that the direct effects of impoundments may persist considerable distances downstream and that these effects are flow-dependent