Controlling Icings on Small Streams

Research addressing natural processes and control of ground and river icings is well established in national and international technical literature, particularly for large river flows. However, controls applicable to small flow icings are less well documented, providing little guidance for the local engineers who are most often asked to design them. To fill this need locally, the Municipality of Anchorage is developing design guidance for icing controls for small features. The guidance will address controls for icings on ground water seepages and surface flows having discharges less than 0.28 m³/s (10 cfs) and channel widths less than 3.0 m (10 ft). This paper summarizes processes and design concepts basic to the development of this guidance for Anchorage.