Innovative Solutions to Improve the Transportation System in Los Angeles County
Providing bus and rail service to over one million boardings each day is not an easy task, yet it is accomplished each day in Los Angeles County (County). In fact, Los Angeles is one of...
Development of Transit Capacity and Quality of Service Manual
A study was conducted to develop updated principles, practices, and procedures for transit capacity and quality of service. Such a study focuses on developing a new Transit Capacity and...
Humboldt Beach and Dune Monitoring
Since 1881, the U.S. Army Corps of Engineers has maintained the entrance channel to Humboldt Bay on the Northern California Coast. This is accomplished through the annual dredging of approximately...
Technology in Support of Policy: The Sandag Regional Beach Monitoring Program
This paper describes a regional beach monitoring program conducted in San Diego County, California, by the San Diego Association of Governments (SANDAG). Initiated in 1996, the program...
Small Firms Check In
Meeting the Staffing Challenge
Monitoring Construction Vibrations (Available in Geoenvironmental Special Issue only)
A review of procedures, criteria and equipment used to protect buildings and other structures from construction generated vibrations, the article begins by describing the importance of...
Stepwise Flood Routing for Gated Reservoirs and Conjunctive Optimization of Hydroelectricity Income with Flood Losses
A six-stage operation policy for routing of flood hydrographs of return periods from 1.01 year up to the Probable Maximum Flood (PMF) for dams having gated spillways is suggested. The...
Water Quality in the Sierra Vista Subbasin, Southeastern Arizona: A Baseline for the Future
As part of the U.S. Geological Survey's (USGS) National Water-Quality Assessment program, water-quality studies were completed in the Sierra Vista subbasin in southeastern Arizona during...
For the Duration
The U.S. Army Corps of Engineers developed a new grouting method called duration grouting when constructing the foundations for the Portugues Dam in Ponce, Puerto Rico. The site is marked...
Electrical Explorations (Available in Geo-Environmental Special Issue only)
Recent advances in state-of-the-art, relatively fast, two- and three-dimensional electrical resistivity imaging (also called profiling or tomography) have offered a new view on subsurface...
Taking the Mystery Out of Retirement Plans
Less than a third of workers at small firms with 100 or fewer employees have a job-sponsored retirement plan, far fewer than that of bigger firms. A survey by the Employee Benefit Research...
Topographic Surveying
Technical Engineering and Design Guides, as adapted from the U.S. Army Corps of Engineers, No. 29 This manual includes the new electronic surveying...
Hydrographic Surveying
This manual establishes criteria and presents policy and guidance for performing hydrographic surveying in support of planning, engineering and design, construction, operation, maintenance,...
Inspecting the Unknown (Available in Geo-Environmental Special Issue Only)
Unknown foundations have plagued civil engineers for years. In the case of underwater pilings, much time and money is spent inspecting for cracks, breaks or deterioration. Even then, visibility...
Deep Mixing Method: A Global Perspective
Various contemporary deep mixing method (DMM) techniques have been used in the United States since 1986. Such techniques owe their origins to Japanese and Scandinavian developments, which...
Monumental Restorations
Modern nondestructive field surveys and state-of-the-art static dynamic monitoring systems provide important information for historical renovations while ensuring that the structure remains...
Mapping with a Differential
A southern New Jersey landfill is using Differential Global Positioning System topographic surveying to cut costs and turnaround time on annual mapping and volume certification. Modern...
Fathoming the Strength of Structures
More and more, the owners of bridges and piers are budgeting rehabilitations based on inspections done underneath the waterline. Increasingly, they want the underwater inspectors to be...
Accelerating Environmental Technology Implementation
A Survey of Present Practices and New Directions
This survey presents findings from the Environment Technology Evaluation Center, which will assist EvTECH in meeting its mission to expedite the introduction of environmental technology...
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