Dillon Canyon Channel & Landform Maintenance Project: Assessment & Concept Design

Dillon Canyon Channel & Landform Maintenance Project: Assessment & Concept Design

Oxbow Ecological Engineering was contracted to assess the post-flood condition of a recently completed channel and landform restoration project at Swastika Mine within Dillon Canyon on Vermejo Park Ranch. OEE inventoried 2,800 feet of stream collecting long profiles data, geomorphic cross-section data, detailed supplemental engineering survey information, pebble counts, point bar samples, bank erosion potential information, and geo-referenced photos. Two reference channels were surveyed and inventoried as part of the work, providing a range of potential analogues that could be used to stabilize the channel. In addition, over 8,500 feet of upland swales and channels were also surveyed and inventoried as part of the field work. OEE collaborated with Watershed Artisans and Fred Phillips Consulting to develop a holistic strategy for improving stream stability and function and regenerative erosion control design to stabilize eroded upland landforms.  Conceptual stream stabilization elements within the damaged corridor include channel conversion at damaged riffles, grade control at riffles and runs, pool construction and bank stabilization on meanders, and dense native riparian and wetland plantings. Conceptual upland stabilization elements include channel reshaping, biodegradable erosion control fabric, rock mulch rundowns, and media lunas.