Mica Creek Experimental Watershed

Shaping sustainable logging practices through stream and watershed research

The Mica Creek Experimental Watershed (MCEW), located in the St. Joe River drainage of northern Idaho, is privately owned by PotlatchDeltic Corporation. This long-term study evaluates the impact of Idaho Forestry Best Management Practices (BMPs) on water flow, water quality, aquatic invertebrates and fish populations. The ongoing research also examines how stream conditions evolve during sequential timber harvests and subsequent forest regeneration within the watershed.

History of Mica Creek

MCEW is one of the longest-running research projects in the College of Natural Resources, offering a wealth of data and ongoing opportunities for study. It also serves as a model for effective collaboration between academia and industry.

Nearly 35 years ago, Potlatch Corporation began examining the impact of modern logging practices on streams. With increasing regulatory requirements and a commitment to sustainable forestry, the company assembled a technical team to investigate the effects of forest practices on stream ecosystems. Potlatch partnered with University of Idaho to conduct unbiased research to better understand and refine its practices. This collaboration led to a $2 million investment from Potlatch and established the foundation for decades of research.

Contributions to research and education

The partnership between U of I and PotlatchDeltic has provided significant benefits to University of Idaho. Researchers have secured an additional $3.7 million in grant funding, published nearly 100 academic works and trained more than 30 students. The original study focused on the effects of timber harvesting—comparing patch harvesting, thinning and mature forests—on streamflows, water quality and aquatic ecosystems. Almost 35 years of continuous data collection has enabled researchers to examine tree growth, harvest system optimization and ecosystem impacts, including insect populations and canopy dynamics.

Mica Creek is regularly featured in tours for policymakers, forestry professionals and academic groups. For example, it was a key stop during the 2012 Society of American Foresters convention and was included in a statewide forest industry tour for University of Idaho’s president, showcasing research and industry collaborations.

Ongoing and future research

Current research at Mica Creek includes monitoring stream flows, water quality and fish populations, along with studying the effects of shade retention in harvested stream corridors. Funded by the National Council on Air and Stream Improvement, this work evaluates large scale relationships between stream buffers and water temperature.

The extensive data collected at Mica Creek also positions it as a valuable site for landcover and climate change research. Its long-term records, covering a wide range of topics, provide a unique foundation for understanding ecosystem changes over time.

Mica Creek’s enduring success is built on a strong partnership between University of Idaho and PotlatchDeltic Corporation, fostering trust and mutual benefit while advancing sustainable forestry and scientific discovery.