Successful Behavioral Devices for Fish Protection
Since 1987, the Electric Power Research Institute (EPRI) has been sponsoring studies of behavioral barrier devices for protecting fish at hydroelectric facilities. Primary emphasis has...
Evaluating Uplift Pressures for Concrete Gravity Dams
An approach for evaluating uplift and dam foundation conditions, which resulted from the initial phases of an Electric Power Research Institute (EPRI) study is presented. An earlier study...
Experience with the Application of Fully 3D Potential Flow Analysis to Runner Design
Hydraulic turbines come in various shapes and types depending on their operating conditions. Their performance characteristics depend largely on the runner which is the most difficult...
Predicted and Observed Axial Behavior of Piles
Results of a Pile Prediction Symposium
This publication presents the results of a pile capacity event that was held at the Lakefill site on the Evanston Campus of Northwestern University in conjunction with the 1989 Foundation...
Beautiful Bridges
There are no rules for creating beautiful bridges. While talent and experience count, bridge design is quite complex and collaboration between highway engineers, architects, and landscape...
From Guesswork to Guarantee?
Maser describes a project to determine the effectiveness of radar and infrared thermography in detecting deterioration of asphalt overlaid bridge decks. The project, sponsored by the New...
Detecting the Defects
According to estimates, for every dollar spent on preventive maintenance of the infrastructure, $10 will be saved by avoiding emergency repairs after major structural failures. Technologies...
Preventive Maintenance: Fixing What Ain't Broke
Municipalities are often caught in the cycle of built-neglect-rebuild. For bridges, the solution is preventive maintenance: keep the bridges clean and painted, and they'll...
Parking Garage Crisis
Corrosion in reinforced concrete parking garages is reaching crisis proportions. The rehabilitation market for these structures is estimated to be as much as $750 million a year, or 30%...
Fast Track, Instant Track
There is a newly constructed railroad bridge over the Wilamette River in Portland, Oregon. The 499 ft. clear maritime channel allows the world's largest ships to navigate...
Box Segmentals: Refining Design
Officials at the Florida Department of Transportation (FDOT), which has built more precast concrete segmental box girder bridges than any other state, say their troubles with that design...
High-Strength Concrete: Weighing the Benefits
Russell, Gebler and Whiting describe the properties of high-strength concretes, the current state of knowledge on freeze/thaw effects, and procedures for batching, mixing, transporting,...
Seismic Codes:Preparing for the Unknown
Few eastern communities follow seismic codes because few communities view earthquakes as a risk. Although California-sized quakes have hit Charleston, St. Louis, they've done...
Resilient Moduli of Soils
Laboratory Conditions
Historically, structural pavement design has been based on static testing techniques, such as the CBR. More recently, the profession has placed increased emphasis on repeated load testing...
The Great Quake: On Site Reports
Written within two weeks of the Oct. 17, 1989 California earthquake, these comments cannot be considered definitive. But they do stress two points: 1) Earthquake codes do work. Buildings...
Classic Wood Structures
Wood has been used in a wide range of structural applications. When properly maintained, these structures can have a useful life from 50 years to several centuries. Thirty-seven unusual...
Roller Compacted Concrete II
This volume includes the papers presented at the 1988 ASCE Specialty Conference on Roller Compacted Concrete. Included in the proceedings are experiences of roller compacted concrete dam...
A Case Study: Relicensing of Pensacola Hydropower Project
The current license for the Pensacola Hydropower Project (orginally licensed in 1939) will expire in 1988. The relicensing process for the project currently is underway. During the consultation...
Studies of Fish Protection Methods at Hydroelectric Plants
Five largely untested but economical fish-protection systems were tested at sites throughout North America. The process of selecting laboratory and field test sites was completed at the...
Frazil Ice Control Using Electromechanical Cibrators and Ice-Resistant Coatings
Two methods, using electromechanical vibrators and ice-resistant coatings, were studied in a small-scale test conducted at the U. S. Army Cold Regions Research and Engineering Laboratory...
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