The Williamsburg: Rehab After All
Whether to repair or replace the Williamsburg Bridge has been seriously debated in New York City for years. Recently, a blue ribbon panel of technical advisors appointed by the Mayor conducted...
Construction's Critical Condition
The United States construction industry is experiencing a decline due mainly to the drop in productivity. Even though tools have improved and labor costs have remained in relative parity,...
New Clarifiers Help Save History
By using clarifiers to upgrade a waste treatment plant, Camp Dresser & McKee were able to utilize the available space so that an historic building existing within the plant could...
Real World Analysis
The structural concepts, seismic analysis and design of five recent highrise structures is presented in this paper. The paper deals with the problem of multistory buildings having Structural...
Reviewing Peer Review
As interest in project peer reviews grows, some fundamental questions remain. What, for example, constitutes an independent peer review? Who is your peer and how is peer defined? Who pays...
Tailored Pre-Engineering Creates a Shopping Giant
Nearly one mile long, a shopping mall in Philadelphia does not fit the warehouse image of pre-engineered buildings. Under construction in northeast Philadelphia, the Franklin Mills Mall...
Recycling Bridges
Faced with the statistics showing that more than half of our bridges have fallen into a state of disrepair, bridge engineers have coined a phrase from the lexicon of conservationists to...
A Safe Skyscraper For the Seismic City
When completed in late 1989, the 73-story First International World Center will be the tallest office building in Los Angeles. The steel structure of the building was designed to be ductile...
Structure as Architecture
The newest structure at Tampa International Airport in Florida is Airside F, part of an expansion of the first airport designed so that passengers are shuttled via monorail between a main...
Landfills: Lessening Environmental Impacts
Controlled recycling of leachates within landfills accelerates abaeribuc microbial reactions, thus converting refuse organics to methane. The process also enhances the precipitation rates...
Caissons Skirt a Tunnel
Exchange Place Center is a 490 ft, 30 story office tower built directly over the existing transportation hub in Jersey City, N.J., where trains and buses meet the PATH Tubes that carry...
Pipe Jacking Advances
Pipe jacking is the remote placement of pipes underground by means of a tunneling machine that carries a train of pipe behind it. This is a relatively new technology in the United States,...
State Perspectives on Water Quality Criteria
The Federal Clean Water Act framework for water quality regulation is reviewed. The role of water quality standards in the regulation of stormwater discharges and the protection of beneficial...
Technological, Hydrological and BMP Basis for Water Quality Criteria and Goals
Water quality criteria and goals may be addressed through at least four means: institution of 1) technology-based controls, 2) best management practice (BMP) based controls, 3) water quality...
Cost-Effectiveness and Urban Storm-Water Quality Criteria
This paper reviews alternative methods of evaluating the effectiveness of investments in urban stormwater quality improvement. Experience in the related area of control of dry-weather...
Federal Requirements for Storm Water Management Programs
The Water Quality Act has provided the Environmental Protection Agency with the framework for developing a comprehensive storm water management program. The initial phases of the program...
A View from the Middle ? Water Quality Act of 1987: Problems and Possibilites for the Design Professional
Stormwater management has traditionally been viewed as a water quantity concern. The Clean Water Act requirement for future permitting of stormwater discharges will dramatically alter...
A View from the Bottom: Challenges and Prospects
This presentation addresses the Water Quality Act of 1987 (WQA) as it pertains to National Pollutant Discharge Elimination System (NPDES) permits for municipal separate storm sewers. Regulations...
Basis for Design of Wet Detention Basin BMP's
Two different approaches have typically been used to formulate design criteria for wet detention basin best management practices (BMP's). One approach relies upon solids settling...
Long Term Performance of Water Quality Ponds
A report developed under EPA's Nationwide Urban Runoff Program (NURP) describes an analysis methodology and presents graphs and example computations to guide planning level...
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