Roslyn Urban Forest

The City of Roslyn is located approximately 30 miles west of Ellensburg. The City of Roslyn assumed ownership of the 300+ acre Roslyn Urban Forest in 2004, protecting the space for wildlife to flourish and public enjoyment. Mid-Columbia Fisheries partnered with the City of Roslyn and Washington State Department of Ecology to complete the Riprian Enhancement in the Roslyn Urban Forest project in fall 2012.

Project goals of enhancing riparian vegetation in the Roslyn Urban Forest are to:
1. Increase long-term shade availability to perennial and ephemeral streams,
2. Improve bank stability,
3. Reduce sediment erosion, and
4. Create a buffer to reduce nonpoint sources of pollution entering the streams from overland flow.

The specific objective of the project is to restore riparian condition along 3,600 feet (2.5 acres) of perennial and ephemeral streambank in the Roslyn Urban Forest. Riparian restoration is aimed at reducing sediment input to Crystal Creek, a fish-bearing tributary to the Yakima River.

Many of the existing trails in the Roslyn Urban Forest were catching spring runoff and functioning as an ephemeral stream, causing increased erosion, sediment and widening of the trails. As part of the site prepartation work, water bars were installed across the trails to direct water into the forest and block sediment transport. After the site prepartation was completed, established trails and crossings were narrowed by planting native vegetation along the margins and surrounding areas to provide shade and reduce sediment delivery into Crystal Creek. In total, 320 native trees a shrubs were planted in the Roslyn Urban Forest. The plant species included: cottonwoood, vine maple, alder, ponderosa pine, douglas fir, grand fir, aspen, big leaf maple and several species of shrubs. Areas of disturbed soil were seeded with a mix of native grasses.