Lemolo Lake, Oregon



Lemolo Lake is the upper-most impoundment on the North Umpqua River and is formed by a 100 ft dam and hydropower facility operated by PacifiCorp. MaxDepth staff applied a hydrodynamic model to the impoundment to determine complex mixing patterns created by two inlets with greatly different summer temperatures and by multiple pathways and depths at which water exited the impoundment. The results helped to explain a metalimnetic maximum in primary production caused by the mixing of the warmer waters enriched in nitrogen with the colder water enriched in phosphorus.