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<br />01)0714 <br /> <br />J,,,).,,.k <br /> <br />> <br />v' <br /> <br />, , <br /> <br />MITIGATION OF POTENTIAL DAMMING OF A RIVER BY A LANDSLIDE <br />by <br /> <br />Louis H. DeGrave <br /> <br />There are three phases for a potential landslide when human effort could try <br />to mitigate the problems associated with soil movement. These are: <br /> <br />Prior to soil mass movement <br />During Soil mass movement <br />After soil mass movement has caused to form a dam <br /> <br />I. PRIOR TO SOrL MASS MOVEMENT <br /> <br />A. At the respective potential slide areas, the state coulo aid <br />(financially) in the construction of a tunnel. <br /> <br />1. A tunnel can be constructed large enough to handle the design flow of <br />the river at the potential landslide. <br /> <br />3, <br /> <br />2. A highway tunnel or railroad tunnel could be constructed keeping in <br />mind the potential use as a diversion for the river. <br /> <br />3. An old mining tunnel could be tapped if one is available. <br />B. A conduit could be constructed. <br /> <br />1. A conduit large enough to handle the design flow could be constructed <br />and lay idle. <br /> <br />J <br /> <br />- <br />3. > <br /> <br />2. <br /> <br />An oversized water main could be constructed. Should a slide occur, <br />the water main could be converted to a "drain pipe." <br /> <br />3. Any other conduit such as natural gas, oil, chemicals, or penstock <br />could be converted. <br /> <br />4. Potentially any other abandoned pipelines. <br />