Search Results for: dam impacts

...breaching, which is a partial removal with a different mix of benefits and impacts. Issue Definition Dams are dominant elements on many rivers and streams in the United States (Graf 1999). While the largest dams are among the few construction projects that can be identified from space, it is the more than 75,000 dams that exceed six feet in height (USACE 1999a in Appendix 3) that expand this issue to all 50 states. Collectively these dams have the...

...changing water levels influence ice loads (Comfort et al., 2000). Seismic impacts on dams can be a concern and some older small structures have been removed because they do not meet current engineering standards. Dam construction is also known to induce seismic activity, water depth being the most important determining factor. One well-established instance of induced seismicity (shock magnitude of 4.3) occurred during the filling of the Manicouga...

...supporting an unencumbered assessment that evaluates all the evidence and impacts of the dam, as well as community consultation. What do you think? Time will tell if this is just an attempt to persuade Council to support the “One River” multi-EA approach or if the Mayor is genuinely looking at the facts, and is open to decommissioning the dam. Those in favor of decommissioning would like to see an independent and unbiased decision on the future o...

...riers also needs to be resolved. 1. Dams and Hydro-electric Facilities The impacts of dams, hydroelectric facilities, and other anthropogenic activities pose significant threats to lake sturgeon in Ontario. A recovery strategy for lake sturgeon in Ontario is currently being developed to provide science-based recommendations on the protection and recovery of this species. Following completion of the recovery strategy under the Endangered Species Ac...

...ture, and provide access to prime habitat and food sources. Removal of the dam and its headpond will eliminate the thermal impacts, directly improve 2647 feet (807m) of brook trout habitat, and removing the barrier to fish passage will allow for unimpeded access to 5065 feet (1544m) of high quality Brook Trout habitat, as well as improve the ecology of the river. The Project will include a new rocky ramp and channel, and riparian tree planting wit...

...s development of silting at a much higher rate than happens in the average dam. If The Chute dam were in place it is just a matter of time before the owners of the dam will have their own very expensive mitigation problem to solve re silting. The projected speed of long term silting has not been studied by Xeneca. Nor has the contribution of additional sources of silting from proposed new river banks in the proposed inundation area upstream from t...

...es. Flooding the river valley during the summer with a repaired Springbank Dam would destroy their nesting ground habitat and reverse the progress that has been made. Dams and impoundments block natural river flow, where water temperatures rise, nutrients and sediments collect, and oxygen levels are depleted. These barriers also fragment fish habitat, and block access to prime spawning areas and key food sources. Such unhealthy ecosystems can sign...

...ghly qualified experts, because highly qualified experts will not quantify impacts that are dissimilar in any comparative way. The second point is sheer rubbish. If you want to know something about impacts, you have to have quantitative information. So they are trying to avoid building any kind of mathematical calculations into understanding them. Models aren’t essential, but they can help. I suspect that the word “model” was put in to imply that...

...or their losses). Affected people include communities living downstream of dams and those affected by dam-related infrastructure such as transmission lines and irrigation canals. Affected people should be able to negotiate mutually agreed and legally enforceable agreements to ensure the implementation of mitigation, resettlement and development entitlements. The project should be selected based on a basin-wide assessment of the river ecosystem and...

...during peak periods. One example of a pumped storage facility is the Sir Adam Beck facility in Niagara Falls. Kinetic Hydro: Kinetic waterpower systems are an emerging technology in Ontario. Turbines are placed in the river and use only the existing water flow, without a head, to generate electricity. Kinetic systems are generally used for smaller scale projects such as a remote cottages or resorts. The challenge is that many of the new proposed...