Top 10 for Chimney Filter/Drain Systems (PowerPoint Slides)

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Corps of Engineers EM11<strong>10</strong> 2 2300 (2004) 1• The primary line of defense against aconcentrated leak through the dam coreis the downstream filter (filter design iscovered in Appendix B). Sinceprevention of cracks cannot be ensured,an adequate downstream filter must beprovided (Sherard 1984).1General Design and Construction Considerations <strong>for</strong> Earthand Rock-Fill Dams
#8 – Use two-stage filter / drain ifconcentrated flows are possibleProvides capacity to handle largeflowAlso negates effects of filtercontamination
Page 1 and 2: TOP 10 FOR CHIMNEYFILTER / DRAIN SY
Page 3 and 4: Effectiveness of ASTM C33Fine Aggre
Page 5 and 6: Filter Gradation DesignPoint 1 is t
Page 7 and 8: Importance of Regrading theBase Soi
Page 9 and 10: Effect of Fines ContentAfter Barber
Page 11 and 12: Effect of Concentrated Seepage
Page 13 and 14: A Set of SuggestedChimney Filter Di
Page 15 and 16: Trenching Method3 ft min.
Page 17 and 18: Typical method specificationsfor fi
Page 19 and 20: #8 - Include full-heightchimney fil
Page 21 and 22: Lowering of Phreatic SurfaceWithout
Page 23 and 24: Top Elevation for ChimneyFilter His
Page 25 and 26: J.L. Sherard, lecture, 1984 1• P.
Page 27: Ronald Hirschfeld, InteragencyCommi
Page 31 and 32: Prevent Concentrated Flowsfrom Over
Page 33 and 34: Washakie Dam - TemporaryBerm and Pi
Page 35 and 36: Negate Effects of FilterContaminati
Page 37 and 38: Plastic Pipe MaterialsProduct Type
Page 39 and 40: #10 - Use two-stage filter /drain s
Page 41 and 42: Two examplesWashakie Dam, WY‣ Flo
Page 43 and 44: More informationMontana Dam Safety

Top 10 for Chimney Filter/Drain Systems (PowerPoint Slides)

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