Case Studies of Bridge Scour in Western New York
As part of the New York State Thruway Authority's bridge hydrologic/hydraulic evaluation program, 63 structures over 42 stream crossings in western New York were assessed for scour potential...
Stream Stability and Scour Training in Support of the NBIS
The Federal Highway Administration is now requiring a comprehensive evaluation of bridge scour as part of the National Bridge Inspection Standards (NBIS). To support the implementation...
Bureau of Reclamation Downstream Hazard Classification
An overview of the downstream hazard classification process used by the Bureau of Reclamation (Reclamation) and other U.S. Department of the Interior (DOI) agencies for the safety of dams...
Using Threat to Life Studies to Guide Dam Safety Decisions
Ensuring that Bureau of Reclamation (Reclamation) dams do not present unacceptable risks to public safety, prosperity, and welfare serves as a primary objective of Reclamation's Safety...
Economic Aspects of the Bureau of Reclamation Safety of Dams Program
The paper briefly examines economic aspects of the Bureau of Reclamation (Reclamation) Safety of Dams (SOD) program evaluation process. Procedures described include the downstream damage...
Scour Prediction Model at Bridge Abutments
A model to predict local abutment scour is presented. The model is based on a large number of laboratory experiments over the past half century. The dependent variable, a ratio that includes...
Bridge Abutment Scour in Compound Channels
Experiments are reported which quantify the effect of channel geometry on local scour at abutments for bridges crossing compound river channels. The channel geometry effects are represented...
Computer Aided Design and Cost Estimation of Gabion Lined Channels
Rivers are a dynamic part of the hydrologic cycle. Changes in discharge, flow depth, water velocity, and meander patterns contribute to this dynamic nature. As a result, portions of a...
Design of Riprap Stilling Basin for Overhanging Pipe
The rock rip-rap basin is the most common and economical method of handling the problem of scour at a pipe outlet. The advantage of the method is speed of construction, absence of the...
Bank Stability Analyses Versus Field Observations
The concept and process of stream bank stabilization design through the development and use of limiting stability curves for the comparison of existing bank height/angle combinations to...
Computation of Flow Past a Cylinder Mounted on a Flat Plate
The surface shear stress distribution in the vicinity of a circular cylinder - mounted normal to a rigid flat plate - produced by the three-dimensional flow past it, is investigated numerically...
The Influence of Exposed Footings on Pier Scour Depths
Data compiled from past test efforts are combined in this article with the results of two new flume test studies. The combined material, presented graphically, suggests a method for adjusting...
Operational and Structural Optimisation of Hydraulic Structures for Light Liquid Removal
The removal efficiency of light liquid separation schemes is determined by the hydraulic inflow conditions, the inflow fluid properties and the separator hydraulics. The relating set of...
Design and Performance of Emergency Spillway Channel Erosion Protection?Grenada Lake Dam, Grenada, Mississippi
Grenada Lake Dam located on the Yalobusha River in northeast Mississippi is part of the Mississippi River and Tributaries comprehensive plan for flood control. The 13,000-ft-long earthfill-type...
The Study of Riprap as Scour Protection for Bridge Abutments
The purpose of this paper is to provide design guidelines for riprap protection of spill-through and vertical-wall abutments situated in floodplains. With the benefit of laboratory experiments,...
Erosion Protection at Hydraulic Structures: A Report From the Task Committee
In 1991 the ASCE Hydraulics Structures Committee formed a task committee on Erosion Protection at Hydraulic Structures. The purpose of the committee is to determine current practices in...
An Assessment of Fish Entrainment and Impingement Potential for an Offshore Cooling Water Intake in a Tropical Bay
Fish entrainment and impingement potential were assessed for a proposed cogeneration facility on the west coast of Puerto Rico that will withdraw cooling water using offshore intake structures....
Supply of Large Woody Debris in a Stream Channel
The amount of large woody debris that potentially could be transported to bridge sites was assessed in the basin of the West Harpeth River in Tennessee in the fall of 1992. The assessment...
The Control and Monitoring of Local Scour at Bridge Piers
A series of flume experiments revealed a possible method of reducing local river bed scour at bridge piers, thereby, reducing the risk of bridge failure. Three prototype schemes were installed...
Comparison of Theoretical and Historical Scour
As part of scour assessments at approximately 120 stream crossings on the New York State Thruway, subsurface investigations were performed at all structures and, in some instances, locations...
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