Pollution Transport in Karst
A new model of pollution transport in natural streams was developed and tested. Dead zone storage is modeled as a two time constant process. This approach better matches the observed persistence...
The Costs and Benefits of Dam Removal on the Elwha River
The Elwha River is located on the Olympic Peninsula in the State of Washington. In the early 1900s two hydroelectric dams were built on the Elwha River. Construction of Glines Canyon and...
Design of a Floodplain Road Crossing Using Two Dimensional Modeling
A two dimensional hydraulic model (FESWMS) is prepared to evaluate flood conditions for the Canal Parkway Project, located in western Maryland. The parkway includes a 32 meter bridge replacement...
Emulation of DWRDSM using Artificial Neural Networks and Estimation of Sacramento River Flow from Salinity
Artificial Neural Networks (ANNs) are widely used and well-suited for multiple non-linear regression. Department of Water Resources Delta Simulation Model (DWRDSM) is a computer model...
Large River Diversion Optimization Considering the Uncertainties Involved
Temporary river diversion during major construction (i.e., large dams) is a challenging job. Selection of diversion system capacity and the dimension of the system components are subject...
River Hydraulics
This manual presents basic principles and technical procedures for analysis of open channel flows in natural river systems. Procedures described herein are considered appropriate and usable...
Balancing on the Tides
Using a system of pivoting, barge-mounted towers, a Virginia contractor floated bridge segments into position 120 ft above the York River, reducing costs and cutting erection time by nearly...
Alluring Approach
A new bridge over the White River in Columbus, Ind., is a unique, architecturally appealing cable-stay, concrete-and-steel structure. The bridge satisfies municipal officials'...
Calendar: Bridges 1997
Featured bridges are: Chouteau Bridge (MO); Torrens Avenue Bridge (IL); Wadell .A. Truss (MO); Michigan Avenue Bridge (IL); Roosevelt Bridge (IL); Benjamin Thrailkill Bridge (SC); Seventh...
Grouting Through a River
A regional sewer district in Ohio is implementing a master plan to separate storm and sanitary flows, decommission some old treatment plants and upgrade others. Part of the plan, the West...
San Francisco CSO
Today, even a light rain can overload San Francisco's combined sewer overflow (CSO) system, sending untreated sewage and stormwater into the bay and ocean. This is especially...
Taming the Red River
The U.S. Army Corps of Engineers completed its last great waterway project, the Red River Waterway in Louisiana, Dec. 31, 1994. The project took more than a quarter of a century and $1.8...
Guarding Against Scour
An overview of the magnitude of the bridge scour problem in the United States is presented, using recent bridge failures to illustrate the problem. Procedures and results from the ongoing...
Beyond Water Witching
Ground-water exploration is usually an uncertain and expensive endeavor. Since late 1993, however, Golder Associates Inc., Redmond, Wash., has been working with time-domain electromagnetics...
Designing for Drama
Near the Passaic River in Newark, N.J., not far from the famous Iron Bound restaurant district and Newark's Penn Station, construction crews swarm around the steel skeleton...
Restoring a Stream Corridor
The Stream Restoration Project is an environmental remediation project in a residential area in the Northeast United States. The soil in the flood plain of the stream was contaminated...
Hydraulic Design of Spillways
Technical Engineering and Design Guides, as adapted from the U.S. Army Corps of Engineers, No. 12. This manual presents guidance for the hydraulic...
Flood Control Doesn't Have to be Ugly
The recently completed flood control project in Rochester, Minn. shows how innovative engineering combined with aesthetically-sensitive design can integrate flood protection into an urban...
Divided We Fall
This article examines the aftermath of a falsework failure during the construction of a Mississippi River bridge in Minnesota. The author reviews the legal issues that arose from the collapse,...
Rising from the River
The Corps of Engineers completed construction of a 20 Million cu yd dredged material containment facility in the Delaware River in 1990. The authors examine the performance of the geotextile...
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