Author: Desiree Derrick TullosPublisher:
ISBN:
Category : Dam retirement
Languages : en
Pages : 0
Book Description
Brownsville and Savage Rapids Dam Removal Effectiveness Monitoring
Author: Desiree Derrick TullosPublisher:
ISBN:
Category : Dam retirement
Languages : en
Pages : 0
Book Description
Effectiveness Monitoring for Brownsville and Sodom Dam Removals
Author: Desiree Derrick TullosPublisher:
ISBN:
Category : Dam retirement
Languages : en
Pages : 21
Book Description
Brownsville Dam Removal Pre-implementation Monitoring Summary
Author: Desiree Derrick TullosPublisher:
ISBN:
Category : Dam retirement
Languages : en
Pages : 15
Book Description
Same River Twice
Author: Peter Kimball BrewittPublisher:
ISBN: 9781321086997
Category :
Languages : en
Pages : 430
Book Description
Dam removal is a new and rapidly growing phenomenon that is reshaping watersheds across the United States; nearly 600 dams were removed from American rivers 1999-2012. Dam removal restores natural flows of water, material, and wildlife upstream, downstream, and out across the floodplain. Despite this massive restorative impact, it is politically controversial, reshaping familiar landscapes and challenging traditional economies and the communities that depended upon them. American dams are aging - 85% of them will be past their useful lives by 2020 - and it is likely that many more will be removed in the future. In this work, I examine the politics of dam removal as well as its impacts on rivers, performing case studies of three major dam removals in one of the United States' removal hotspots, the West Coast. The primary restoration target in this region is populations of Pacific salmon and sea-going trout (genus Oncorhynchus), which were historically enormous but are now largely endangered. The 47-foot Marmot Dam was removed from Oregon's Sandy River in 2007, the 39-foot Savage Rapids Dam came out of Oregon's Rogue River in 2009, and the Elwha/Glines Canyon complex, 105 and 210 feet tall, started to be removed from the Elwha River, Washington, in 2011. Each of these dams was functional and economically productive when it was removed. I analyzed the political frames, venue shopping, and advocacy coalition dynamics of each case. In each case, the most challenging political frame was the cultural role of the dam and reservoir, which had long provided ancillary recreational and scenic benefits to the public --- the community saw the artificial lake as their natural landscape. The policy subsystem governing dam removal is broad and evolving, so stakeholders found useful political venues in many places. Ultimately, it was necessary for each group of stakeholders to form a mega-coalition, wherein nearly every interest group worked together to seek a united solution. It was necessary to go to the federal government or to create new inclusive venues to accomplish this and to fund the dam removal. In the cases of the Savage Rapids and Elwha Dams, the political process took decades and was challenged by many bitter clashes between stakeholders. In the case of the Marmot Removal, an efficient and amicable solution was reached in less than five years, setting an example for future dam removal project. There have been dozens of dam removals on the West Coast, costing many millions of dollars, but there has been scanty attention paid to their effectiveness for restoring salmonid populations. I assessed these removals' effectiveness in restoring these fishes' access to upstream habitat, and found that while formerly-excluded salmonids do recolonize upstream habitat in most cases, there has been little consistent monitoring of these projects. Monitoring is particularly problematic for dams that provided upstream passage prior to removal - such cases require baseline data to assess the effectiveness of dam removal, but baselines are rarely established, and in most of these cases success is impossible to prove.
Characterizing Community Impacts of Small Dam Removal
Author: Denise E. ElstonPublisher:
ISBN:
Category : Dam retirement
Languages : en
Pages : 230
Book Description
Emerging river policy has launched small dam removal as a viable option to meet the ecological and social demands for river restoration. As small dam removals gain precedence as a policy tool in river restoration projects there exists a glaring gap in the social considerations, in particular how small dam removals may affect existing community conditions. In order to determine the community impacts that may result, a case study of the Brownsville Dam Removal, in Brownsville Oregon was investigated to address two questions: 1) how has the Brownsville Dam removal affected the social and economic conditions of the community and 2) what indicators can be used to characterize and monitor the impacts. Twenty-nine semi-structured interviews were conducted with four community affiliations: 1) Canal Company members; 2) Calapooia Watershed Council members; 3) City Officials; and 4) community residents. A participatory social impact assessment (SIA) approach was used to validate existing and/or emergent impacts and indicators. The semi-structured interviews assisted in the development of a matrix of impacts and indicators specific to small dam removal. The local impacts and indicators were operationalized and measured. Findings suggest that the social and economic impacts when distributed across the community are minimal in this case of small dam removal. Because local data availability is limited, it was determined that the traditional social impact assessment framework can be vastly improved through the engagement of the community. This research further suggests that when collaboration is extended beyond a unidirectional flow of information (which is often the case in a traditional SIA), issues and concerns are open to deliberation in a non-threatening arena. The Calapooia Watershed Council served as the forum through which the residents of Brownsville were able to enhance their participation in decision making. This also contributed to a learning process that in the end furthered the community's understanding of the dynamic physical changes to the Calapooia River as well as their capacity to solve complex decisions. The case also demonstrated that collective learning is a reflective process of adjustment to the changing circumstances in which the community came to perceive, interpret, and act upon their interest. With a growing number of collaborative partnerships of watershed based management, distinguishable by their decentralized, participatory engagement of stakeholders, it may be likely that these place-based mechanisms will become the nexus to the successful coordination of small dam removal deliberation in the future.
Comparative River Restoration Approaches
Author: Value Engineering, Final Report, Savage Rapids Dam Removal and Pumping Plant Replacement -- Grants Pass Irrigation District, Josephine County, Oregon
Author: Grants Pass Irrigation DistrictPublisher:
ISBN:
Category : Dams
Languages : en
Pages : 38
Book Description
Development and Decommissioning of Small Dams
Author: Kelly Maren KiblerPublisher:
ISBN:
Category : Dam retirement
Languages : en
Pages : 278
Book Description
Management of small dams may have profound implications for the health and integrity of small rivers and freshwater diversity. Global indicators suggest future growth in the small hydropower sector, particularly in developing countries. As a renewable energy source, it is often presumed that small hydropower entails fewer and less severe negative externalities than those associated with development of larger hydropower facilities. However, as very little study exists investigating the cumulative effect of small-scale hydrodevelopment on ecological and social systems, limited data is available to substantiate this assumption. To enhance understanding of small hydropower effects, I present a comprehensive comparison of biophysical consequences of small and large hydropower stations in Nujiang Prefecture, Yunnan Province, China. My comparison indicates that cumulative ecological effects of small hydropower development may equal or exceed those associated with development of large hydropower. Because negligible adverse effects are anticipated, small hydropower projects often are characterized by reduced project oversight, streamlined permitting processes, relaxed requirements for environmental impact assessment and mitigation, and increased opportunity for international support relative to large hydropower projects. Outcomes from my comparison of small and large hydropower stations in Nujiang Prefecture and synthesis of available study from diversion-design facilities suggest that current policies allowing less rigorous standards of impact assessment for the small hydropower sector should be reevaluated. Further study is necessary to optimize management that minimizes the consequences of small hydropower and to create effective policies encouraging low-impact development of renewable energy sources. With regard to decommissioning of small dams, the restoration potential of small rivers impounded by reservoirs filled with coarse sediment may outweigh the likelihood of detrimental dam-removal effects. After removal of the Brownsville Dam from the Calapooia River, Oregon, aquatic habitats directly below the dam became more heterogeneous over the short term, while changes further downstream were virtually undetectable. As the Brownsville Dam stored coarse rather than fine sediments, outcomes following removal differ from results of many prior dam removal studies. As current conceptual ideas of dam removal effects are largely informed by study of low-gradient systems transporting finer sediments, I propose a refined conceptual model describing downstream geomorphic processes following small dam removal when upstream fill is dominated by coarse sediments. Dam removal monitoring studies challenge many basic assumptions of conventional experimental designs and data analysis techniques, thus the quality of information available to aid decision making may often be questionable or misleading. To assist managers in undertaking dam removal monitoring, I also discuss assets and limitations of monitoring and analysis options available for dam removal studies, with emphasis on selecting a rigorous experimental design and determining significance of results.
Post-dam-removal Channel Complexity Monitoring Survey Data Analysis, Sandy River, Oregon, 1st Year Following Dam Removal
Author: Savage Rapids Dam Testimony
Author: Dennis M. BecklinPublisher:
ISBN:
Category : Fishes
Languages : en
Pages :
Book Description