Stream Simulation Design Process - USDA Forest Service

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Bridges •Foundation can sit on soil or rock foundations and usually consist of: – driven piles: good for soft soils, any soil, or when driven to bedrock - noisy – piers – usually drilled to bedrock or to firm ground – retaining walls – shorten bridge but may cost more overall – spread footings – economical where channel is stable. Spread Footing Piers or piles
Bridge Structures Wood: Glue laminated, trusses, sawn timber, logs, treated & untreated, economical Pre-stressed concrete, pile foundation on bedrock is durable, economical Steel: Permanent or temporary, some modular, painted or weathered steel for durability
Page 1 and 2: Stream Simulation Design Process As
Page 3 and 4: Stream Simulation How big is it?
Page 5 and 6: Culvert Size 1. Based on Project Ob
Page 7 and 8: Bed profile elevation; average of m
Page 9 and 10: Stream Simulation - gentle gradient
Page 11 and 12: Stream Simulation culvert width •
Page 13 and 14: Stream Simulation culvert width b.
Page 15 and 16: Design for sustainability, especial
Page 17 and 18: The same stream simulation can usua
Page 19 and 20: Pipes • Maximum embedment = where
Page 21 and 22: Barnard
Page 23 and 24: Box Standard Arch Arches (embedment
Page 25: Bankfull width structure after 16 y
Page 29 and 30: Bridges are beautiful, but don’t
Page 31 and 32: A Much Better Bridge Nice! Hey, aqu
Page 33 and 34: Geometry & Fit Considerations • R
Page 35 and 36: Structure shape versus channel shap
Page 37 and 38: Structure shape versus channel shap
Page 39 and 40: High and Low Profile Structures Low
Page 41 and 42: Bottomless Arch Miscellaneous Place
Page 43 and 44: COSTS $160,000 $140,000 $120,000 $1
Page 45 and 46: Changing from 8’ open bottom arch
Page 47 and 48: Durability - Abrasion Abrasion rate
Page 49 and 50: “Normal” Corrosion & Abrasion i
Page 51 and 52: 1. For 16 gage galvanized steel, th
Page 53 and 54: The minimum adequate structural thi
Page 55 and 56: Foundation Conditions and Slope Sta
Page 57 and 58: Bearing Capacity & failure modes pi
Page 59 and 60: Footing Shapes for Open Bottom Arch

Stream Simulation Design Process - USDA Forest Service

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