Less is More: Using Sustainability as a Tool for Innovation in Stream Restoration Design and Construction
This workshop is for designers, engineers, project sponsors, regulatory experts, and others who are interested in creating highly functional, resilient, and cost efficient projects. Many stream restoration projects are implemented which specify the use of exotic materials that are not available locally, rely on quarry rock as the key component of stability, fail to encourage the reuse of on-site materials, and result in projects high in cost and carbon output. By integrating sustainable strategies and tactics, practitioners can realize tremendous overall cost savings as well as reducing short and long term carbon output. Workshop participants will learn how to incorporate sustainable strategies, methods and techniques into the stages of a project’s development: site analysis, design, and construction/long term site integrity.
Toe Wood Instructional Video
Piney Creek Coldwater Restoration – Combining Legacy Sediment and Natural Channel Design Approaches to Stream Valley Restoration
Ecologically significant reaches of two unnamed tributaries to Piney Creek, a coldwater fishery in Baltimore County, MD, was restored in 2012 utilizing natural channel design and legacy sediment removal. The site was previously drained and ditched to facilitate agricultural use of the floodplain. The design approach included a multi‐cell wetland complex to hydraulically connect to the two restored headwater streams. Both support healthy populations of both brook and brown trout. In addition to 2,500 feet of stream and 5.3 acres of wetland restoration, over 32 acres of reforestation was planted on the 72 acre property. The restoration was designed to restore historic floodplain surface elevations, enhance groundwater exchange to the streams, promote the establishment of high quality fisheries habitat, and promote sediment and organic matter retention within the restored wetland complexes. The historic peat layer found throughout the site was use as a high quality top soil/organic layer and was relied upon as a seed source for the reestablishment of hydrophytes. The design incorporated the use of sustainable restoration techniques to minimize costs and maximize long term resiliency. A combination of sod matting, woody bioengineering materials and deep rooted warm season grasses were used to provide initial stability along the restored low flow channels. The project utilized local ecosystem credit markets to fund the property’s acquisition and restoration work. Vegetative, fisheries, and geomorphic responses to the restoration as well as maintenance activities are presented and discussed.
Restoration Construction Challenges that Arise Throughout Bidding, Construction, and Maintenance
A contractor’s perspective on the challenges that arise, beginning with the bidding process through construction and maintenance of a restoration construction project. How seemingly minor plan adjustments have significant impacts on job pricing including; material specification and acceptance, site access and associated requirements, construction equipment limitations, and storage. Throughout the design, bid, build and maintenance process contractors are striving to provide a competitive price while incurring significant costs beginning with the bid process and long after the restoration construction is completed. This presentation will discuss the upfront time to research and ascertain suppliers for specified non-native materials, purchasing or leasing equipment to meet site requirements, including the maintenance needs that incur from limited access, and coordinating hauling for imported and exported material with minimal storage areas or inadequate maneuver space. We will provide input on what is required by the contractor to competitively bid projects. We will discuss how collaboration between the designers, owners, and contractors throughout the project will help reach the project goals and ensure that the project proceeds efficiently. Several areas of cost saving opportunities will be identified, such as utilizing on-site and native materials, balancing the project site, providing ample storage areas, and allowing for sufficient access. We will also discuss how to utilize a contractors experience to determine the optimum work conditions and equipment needs, and how they both drive the costs of projects.