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Posted on October 5, 2021 at 9:37 AM by Jordan Mead
Its been an exciting and fast-moving month since the last post. Open Space staff has been meeting with the contractors weekly throughout the construction phase, to review progress and give input. We also led a field trip with project partners from Colorado Parks and Wildlife, as well as the US Fish and Wildlife Service. It has been great to share the results of our work and fruits of our labor with our partners, which aligns with the goal to create an example for other restoration projects to follow and build off.
The team at Ecological Resource Consultants and Tezak Heavy Equipment has been doing some incredible work on Reach B of the Swan River and the results are easy to see. Work has not only progressed quickly, but has also included some tremendous improvements over Reach A through alternative bank stabilization, incorporation of local transplants, variation in stream width and depth, and the installation of side channels and islands, as well as step pool wetlands. In this post, I will walk you through the construction process and show examples of the work in progress, as well as the final product.
The first step towards creating a functional stream is excavating the channel and giving the water a place to flow. This initial "roughed in" channel included all the basic shaping and placement of the channel, as well as mass grading and soil placement adjacent to the new channel. This channel excavation phase also included the installation of a run down channel on the upstream end of the new channel to collect surface flows during spring runoff. Our contractors started work on this phase in Late July and early August and the new channel is now fully in place.
Following stream excavation, bank stabilization and habitat feature installation were completed next. Over the past month, the stabilization and in-stream habitat features of the river were installed including large woody debris, boulders, islands, and willow transplants, as well as the riffle-pool-glide sequences which give the stream channel variability in depth, velocity, and general morphology, mimicking natural stream systems in similar substrate types. Once these features were installed, final grading and soil placement along the channel were completed and the site was ready for initial revegetation and erosion control work.
The final phase of construction occurring in 2021 is the initial revegetation of the site and placement of erosion control devices to help keep everything in place. The team at Western States Restoration is progressing this work, as I write. Initial revegetation consists of; fertilization of the site to ensure adequate nutrient availability for establishing plant communities, planting the entire restored area with the appropriate riparian (near stream), transitional, and upland seed mixes, and installing biodegradable erosion control fabric and straw logs.
Next season, we anticipate completing the restoration of Reach B, which will conclude the large-scale restoration efforts on the publicly-owned portions of the Swan River. Work in 2022 will include reclamation of the gravel stockpile site (about 5 acres) including ripping, contouring, soil placement, and revegetation of that area. In the areas currently being restored as well as the stockpile area, large scale planting of trees and shrubs will take place in 108 "planting pockets" across the site. These pockets will consist of densely planted clumps of trees and shrubs located in small depressions which are back filled with top soil and finished with a layer of mulch. By planting vegetation in theses clumps, or pockets, the moisture and nutrient retention in these planting areas will be maximized by diverting water to the depressions, minimizing evaporative losses by creating shaded areas and adding mulch, and creating a natural, nutrient-cycling dynamic within each pocket. After we conclude the installation and construction phase on Reach B, 5 years of US Army Corps of Engineers monitoring will be required, along with additional monitoring done by the County and its partners, including vegetation monitoring, cross sections of the stream channel, and fish population assessments through electrofishing surveys.
2021 is the last year of Army Corps required monitoring on Reach A. We will continue to keep monitoring this stretch of river through observations by staff, as well as fisheries surveys performed in conjunction with Colorado Parks and Wildlife. We are constantly looking for ways to improve Reach A. The Open Space and Trails Department has engaged volunteers from the Blue River Watershed Group and the Sierra Club to collect and redistribute native seed on the Reach A site, focusing on areas where vegetation is sparse. Along with collecting and distributing seed, these volunteers have added top soil and compost to these areas to encourage the establishment of additional vegetation.
Open Space staff is also working to form a new partnership with American Forests to install planting pockets on Reach A, similar to what will be installed on Reach B. By increasing the diversity of vegetation species and density on Reach A, the opportunity for new habitat types to establish is also increased. These pockets would be planted with aspen, blue spruce, Engelmann spruce, and bristlecone pine, as well as big sagebrush, antelope bitter brush, and wax current. We will continue to provide updates on any new work occurring on Reach A and give volunteers the opportunity to contribute to this amazing work!
For more information and to sign up for volunteer opportunity notification, please email Jordan Mead, Resource Specialist at firstname.lastname@example.org or give me a call at (970) 668-4065.
Posted on August 20, 2021 at 12:57 PM by Jordan Mead
Progress on the Reach B restoration effort continues and the Team at ERC/TEZAK are doing a great job of bringing the plans into reality. I have the pleasure of visiting the site at least a couple times per week, and the obvious changes at each visit are truly astonishing. The biggest change this week was the installation of the 50' bridge on Rock Island Road which provides seamless connectivity between Reaches A and B and will allow for the uninhibited movement of fish and other aquatic organisms!
In addition to the new bridge, the team has completed channel excavation for about 750ft to the south and east of the bridge, as well as staging of boulders and cobbles for in-stream habitat features and bank stabilization. Top soil is also being moved around the site to prepare for final grading along the stream channel following habitat install and bank stabilization. Next week, standign dead trees will be harvested to serve as Large Woody Debris features and further stabilize the newly formed banks.
Summit County Open Space and Trails will be hosting volunteers from the Blue River Watershed Group on Wednesday, August 25th to collect seed and aid in continued revegetation efforts on Reach A. I look forward to sharing some pictures from that volunteer day next week! Thanks for reading and be well!
Posted on July 26, 2021 at 12:24 PM by Jordan Mead
Today is a big day! As of July 26th, 2021 our partners at Ecological Resource Consultants and Tezak Heavy Equipment will be mobilizing crews and setting the stage for channel construction and Rock Island Road bridge installation. The pull off at the intersection of Tiger Road and Rock Island Road will be used by crews to stage equipment and will be closed to overflow parking from the Tiger Trailhead through the end of the construction season. Rock Island Road will remain open to the public throughout the construction phase, including during bridge installation.
This seasons work will include final grading, channel construction, bank stabilization, bridge installation, and initial revegetation of the site. When completed, 4,800' of new channel, 13 acres of riparian habitat, and 5 acres of upland habitat will be created on Reach B. The new channel will include 20 riffle-glide-pool sequences that mimic the natural morphology of reference streams in similar elevations and habitats. These sequences will provide natural aquatic habitat and will be paired with large woody debris and boulder installation to further diversify the available habitat along this stretch of stream. New bank stabilization techniques that utilize logs and root wads will also be installed on this stretch to serve as fish refuges. By taking into consideration lessons learned on Reach A, we have made these improvements to the Reach B design and will continue to utilize the most current restoration techniques.
Last week, Summit TV was on site to shoot some aerial photography prior to the beginning of construction (see the photos below). Colorado Parks and Wildlife also toured the Reach A site recently to see an example of successful stream restoration and the following establishment of brook trout and sculpin populations. We hope that this project can continue to serve as a model for stream restoration, both here in Colorado and around the country.
Keep following the blog to see progress photos throughout the construction season and the transformation of the site.