Into the Fourth Dimension
A team of contractors designed a pharmaceutical plant entirely in 3-D CAD, then linked the renderings to a cost program and scheduling software, adding a fourth dimension�time�to the process....
Guidelines for the Seismic Evaluation and Upgrade of Water Transmission Facilities
Prepared by the Technical Council on Lifeline Earthquake Engineering of ASCE This TCLEE Monograph provides guidelines for the seismic evaluation and...
Retrofitting CSO Infrastructure in New Haven, Connecticut
(No paper) The City of New Haven Water Pollution Control Authority operates a wastewater collection and treatment system which serves over 130,000 residents in the cities of New Haven,...
Simplification of Detailed Models of Water Distribution Systems Obtained from GIS Systems
For a long time simplified models have been used to simulate the behaviour of large water distribution networks. Often, simplification has been carried out by removing small diameter pipes...
Impacts of CSO Swirl Concentrator on Dissolved Oxygen Concentrations in the Anacostia River
Purpose: To assess impacts of the CSO control, two continuous monitoring stations were located upstream and downstream from the CSO outfall. The monitors recorded dissolved oxygen (DO),...
Friction Factor Choice in Hydraulic Simulation Models: Does It Matter?
(no paper) To model water distribution systems using computer hydraulic simulation, a user is required to select a form of head loss-flow relationship for each pipe in the network. The...
Sensitivity of Stormwater Conveyance System Cost to Design Recurrence Interval
(No paper) The cost of a piped and/or swaled stormwater system is determined principally by the storm recurrence interval (e.g., 5-year design storm) used to design it. That is, the present...
Under Pressure
The Arrowhead East and West contracts for the Inland Feeder water conveyance system being built in California consist of 51,500 ft (15,700 m) of tunnels that cross the San Andreas Fault...
Main Line Mending
Both the Washington Suburban Sanitary Commission (WSSC), of Laurel, Maryland, and the Providence Water Supply Board, of Rhode Island, are conducting massive, multimillion-dollar rehabilitation...
Relining a Relic
By the mid-1980s most of the Boston Low Service water supply network had been in operation for more than 100 years�with little regular maintenance. Many of the system's air...
Tunneling under Trains
The Singapore deep tunnel sewerage system consists of a 90 km long tunnel network that will convey wastewater by gravity flow to two new secondary treatment plants being planned for the...
Conquering the Cold
Three projects�a water treatment plant, an airport, and a hydroelectric plant�illustrate how practicing engineering in Alaska differs from working in the contiguous 48 states. Permafrost,...
A Joint Effort
In a public-private partnership that required close working relationships, a project that aimed to restore an old canal system� and its waterfront�in Richmond was combined with an effort...
CSO Controversy
Under the Environmental Protection Agency's (EPA's) national combined sewer overflow (CSO) policy, more than 900 cities will no longer be able to discharge untreated...
Conquering the Mountain
Interstate 26 will be the largest and most expensive highway project ever undertaken in North Carolina. When completed in 2002, I-26 will provide safe and efficient interstate passage...
Seattle Solutions
Many of Seattle's most important bridges are vulnerable to serious damage if a much-anticipated big earthquake hits. A city-wide study designated lifeline structures for retrofitting,...
Defying Gravity
Vacuum sewers, a technology once used only in areas unsuitable for standard gravity sewer systems, are coming into mainstream use in highly developed areas as reliability improves and...
Probing Pipelines (available only in Geoenvironmental Special Issue)
Inspecting underground pipelines has become easier, more effective and less intrusive through use of sonar, radar, lasers and seismic and acoustic testing. To replace simple visual inspection,...
Coldhearted Building
A 20,000-ton district cooling plant owned by the Public Service Company of Colorado was recently built to sell chilled water to customers in downtown Denver who will use it to air-condition...
Do Coated Pipes Last Longer?
Field studies have revealed that polymer coated steel pipe resists corrosion longer than pipe coated with other materials. Corrosion is the most common failure mechanism of pipe culvert,...
Return to search