Seepage Control in Earthen Dams

3.5 million miles of water run throughout the United States; and since the country’s conception, over 80,000 dams have impounded 600,000 miles of these waters [1]. Dams were originally constructed to provide water to towns and establishes energy sources for mills and later hydroelectric plants. Because these dams were constructed decades ago, they’re reaching a critical point of obsoleteness where they cause more harm than good. Dam removal is increasingly popular across the country to address the ecological problems including habitat loss and sedimentation, despite potential for downstream harm, removing dams is more environmentally and economically cost effective than upgrading them. The Marmot, Glines Canyon, and Elwha river dam removal projects each highlight different challenges of dam removal, but overall

It didn't take long for the South Fork dam to become so overwhelmed that it broke and dumped water onto the town causing the deaths of 2,200 people. This was not the first problem they had with the dam though; structural problems with the dam were not a new development. Only two years after the finishing of the dam 2 leaks were discovered before the dam was even put into its full usage. They were forced to empty the dam so they could repair it. The dam suffered a major break on June 10, 1862, when the up-stream portion of the stone culvert running under the dam collapsed (Haddock, Vikki). There was little damage to property downstream, but a large section of the dam over the damaged portion of the culvert collapsed and was washed away. They dam was then closed and left with the large gap in it because of financial reasons until 1875 when the Pennsylvania Railroad sold the dam and also 500 acres to Benjamin Ruff who wanted to turn the area into a summer resort. Ruff's plan was to fill in the gap left in the dam and allow the lake behind it to refill to make a resort and the remaining water would run-off he had decided to sell the valves used to control the run-off for scrap metal (Johannson, Shelley). Ruff had hired a man to fill the gap who had some experience building railway embankments but no experience with dams. The plan was to add a double thickness of hemlock pilings was placed across

There are six different types of water erosion: splash erosion, sheet erosion, rill erosion, gully erosion, valley or stream erosion, and bank erosion. Splash erosion is when raindrops hit soil and small soil particles are displaced. Sheet erosion is when raindrops remove soil in thin layers. During rill erosion, small concentrated flow paths are created. “These paths create a sediment source and delivery system for hillslope erosion. Areas where precipitation rates exceed soil infiltration rates are more prone to this type of erosion. During gully erosion, water flows in narrow channels during or after heavy rains or melting snow. The gullies can erode to considerable depths. Valley or stream erosion is created by water flowing alongside land. It extends downward, deepening a valley, and extending the valley into the hillside. This occurs more frequently

Dams built for flood control and water catchment along the rivers leading to these coasts inhibit the transport of large grained

However, the dams were of faulty construction. Dam number one which caused the flooding was constructed of coarse mining refuse that Pittston had dumped into the Middle Fork of Buffalo Creek starting in 1968. This dam failed first on the heels of heavy rains. The water from Dam number three then took out dams number two and then number one. Dam number three had simply

The State Water Commission provides many laws and policies that citizens and businesses in the state must follow. Also, something that I found very interesting was that the Water Commission is involved in a variety of special water projects. One project that I will focus on is the Dam Safety project. The purpose of this project is to provide a program to minimize the risk to life and property associated with the potential failure of dams in North Dakota. The State Water Commission conducts dam inspections in order to identify any maintenance repairs that should be done. The image that I have provided below is a map of water well records, dams, drains, water levels, etc.

McCullough once again reiterates the responsibility of man prior to the 1889 disaster with the example of Daniel J. Morrell’s concerns in 1880. He sent John Fulton on behalf of the Cambria Iron Works to inspect the dam, where two major structural problems were found: there was no discharge pipe to reduce water in the dam, and, the previous repair left a leak that cut into the dam. This initial warning and advice was rejected, even after their offer to pay for repairs. McCullough then points out that there were in fact four other crucial problems that needed to be repaired that had not been noticed by Fulton. The height of the dam had been lowered, reducing the height between the crest and the spillway. A screen of iron rods were put across the spillway, which would decrease its capacity when clogged by debris. The dam sagged in the center so it was lower than at the ends when the center should have been highest and strongest. Lastly, the club brought the level of the lake nearly to the top so there was no reserve capacity for a severe storm. By indicating the many problems with the dam prior to the great flood of 1889 and the South Fork Club’s refusal to acknowledge the potential danger, McCullough is leaving little doubt to the reader of his

In 1992, The Elwha River Ecosystem and Fisheries Restoration Act of 1992 authorized the US Federal Government to acquire the hydroelectric power projects of Elwha Dam and Glines Canyon Dam, where are located on the Washington State for demolition for habitat restoration and decommissioning. The dam removals began in 2011 and finished in 2014. I wondering that why government decided to remove the dam and what happens in Elwha River after dam removal. In this paper, I write about the following topics: main purpose of the Elwha and Gliens Canyon dam, effects to the Elwha River as well as ecosystem after constructing dam, reasons of the dam removal, process of the dam removal, and effects after dam removal.

The levee system has disrupted the natural deposits that are left from the overflow of the river.2

Hydroelectric dams as energy sources have many advantages; they provide a renewable energy source, it can take the place of fossil fuel usages, and while being built dams can significantly help jobs in the development industry (Perlman). However, these dams are extremely costly, not just economically but environmentally and socially as well. These costs can be demonstrated by looking at the consequences of other dams. Three Gorges in China: release of methane gases, deforestation, water pollution, ecosystem disruption. Glen Canyon Dam: sedimentation, endangerment and extinction of species endemic to the area, poor water quality, crippling of ecosystems downstream—and these are just the environmental impacts! All of these

The Teton Dam was built in southern Idaho’s Snake River basin on the Teton River. Extensive studies were conducted at the site to test for things like water availability and soil structure. The main aim was to provide water that could be used in times of drought as a buffer. The area was irrigated well using wells; however, extra water is always welcome in the southern Idaho desert. Many of the short comes of the site were over looked. Engineers stated that the dam could be built well enough to overcome the issues in the land. On June 5 the engineers were proved wrong.

The dam is exactly as it seems the dam stores minerals unused by the mining company. The minerals are considered to contain copper and other toxic material. If the dam were to break the effects would be catastrophic. Since 1889, there has been a large majority of dam failures in the United States. The most devastating dam failures happen to be the Kelly Barnes Dam, Teton Dam, Baldwin Hills Reservoir, West Virginia slurry dam, and the Johnstown Dam. Each of the failures made a murderous imprint in every newspaper and story. Unfortunately, people lost their lives to each of these events. What’s to say that the Pebble Mine Dam wouldn’t do the same? The Pebble Mine Corporation states that they have engineered a dam that is able to withstand size 7.8 earthquakes. However, studies show that the area has had earthquakes up to 7.9. Although the Pebble mine states that the fault along Alaska has been dormant for ten thousand years, flooding from heavy rains is also a high possibility and should not be disregarded from the final decision. To ensure that the dam is safe well into the future supervision would have to be set on the dam

The purpose of this report is to geologically evaluate the potential hazards for flooding in Hazard City. This report will include a detailed historic and extrapolated Stream Gauge Data Worksheet, as well as a graph of the Discharge Frequency Curve expected on Clearwater River. The report will provide Hazard city with my scientific analysis, conclusions, and provide recommendations concerning potential flood damages.

While thousands of homes are being evacuated in Rosharon, TX, due to flood waters, one man has found a way to protect his property and his family. Using a product that he discovered online, the Aqua Dam, Randy Wagner has been able to keep flood waters away from his home.

The relevance is given as we need an adequate material to build the dam as well as enough water to achieve a water level and finally to maintain that level. It also should be thought about a solution for the silt coming down the river in order to keep on getting a clear flush.