Environmental Epidemiology and Sanitation
This paper reviews the key variables determining the transmission of excreta-related diseases, sets out an environmental rather than biological classification of these infections, and...
Field Control Replaces Design Conservation At World's Largest Underground Powerhouse
The excavation of 16,000,000 yd� of rock at LG-2, part of the La Grande hydropower project in Canada, has been completed. The world's largest underground powerhouse, with...
Foundation Soil Preload Saves $164,000
Soils in the lower Mississippi valley are highly compressible and present a challenge to structural foundation designers. Rather than support power plant structures on piles, one design...
Mammoth Construction Jobs: How to Speed Them, Cut Costs�
Not a few massive construction projects in such fields as mass transit, water resources, and power plants are suffering greatly from inflated costs and long delays. Among reasons are the...
Underground Hot Water Storage Could Cut National Fuel Needs 10%
The possible conservation of waste heat by using it to heat water and then, subsequently, injecting the heated water into wells screened in aquifers containing saline water is described....
What's New in Roofing�
For 75 years the waterproof membranes in roofs were made the same way�layers of bitumen alternating with layers of felt. Now for the first time prefabricated membranes of synthetics are...
Coastal Controversies Abound at Record-Breaking Conclave
Coastal Zone '78 was the largest specialty conference ever held by the ASCE, drawing over 1,000 participants from a wide spectrum of professions that are involved in coastal...
Sanitary Sewers for Developing Countries
To combat disease, we try to ensure water supply purity. Water is only one of many methods of disease transmission, however, and its purity does not alone eliminate the spread of disease....
Cofferdams�Economical Flood Protection
Houston Lighting and Power Co. Sam Bertron Generating Station, located on the Houston Ship Channel, had suffered a drop in elevation of 7.5 ft since its construction in 1954. At such a...
Reliability and Limit States Approaches to Design
Increasingly, designers of structures and other civil engineering projects will be designing in these ways. What is the reliability approach? It is based in part on the fact that the magnitude...
High Voltage Transmission Lines: Pros and Cons
This article, written in response to a CE Engineering News item, puts into perspective some of the pros and cons of high voltage transmission lines (500 and 765-kV lines). Specific problems...
Weather Modification Could Solve Some Water Resource Problems
On July 12, 1978 the Weather Modification Advisory Board submitted its final report to the Secretary of Commerce. The report proposes a national program for weather resources management,...
Gophers Go Underground
A major facility, Williamson Hall, was constructed to be almost entirely below grade on the East Bank Campus of the University of Minnesota. Heating and cooling energy requirements will...
Energy Facilities Going Underground
Environmental pressures, combined with continuing development of hard-rock excavation techniques, have turned attention to the placement of major engineering facilities underground. Primary...
Peaking Power from Stored Air
Pumped storage has been recognized as a means of supplying additional electric power generation capacity during peak load periods for quite a while. However, such facilities are traditionally...
Mammoth Transshipment Terminal Links Montana Coal to Michigan Power Plant
In 1973 Detroit Edison contracted with the Decker Coal Company for 200 million tons (181 Tg) of Western low-sulphur coal over a period of 26 years to meet its requirement for low-cost,...
Putting Alternative Sources of Energy Into Perspective
Until the year 2000, the main energy sources will remain fossil, nuclear, and hydroelectric; synthetic fuels, solar, geothermal, and wind energy are the only alternatives likely to be...
Productivity on the Construction Site
On-site productivity in construction rose dramatically in the years after World War II as tasks were mechanized and larger equipment introduced. But in the past 10 years, that had gone...
Containment Aspects, Scrubber Sludge Disposal System
Containment of flue gas desulfurization sludge from a coal-fired power plant was accomplished by Dravo Corporation in an environmentally acceptable manner through the construction of an...
King Post Truss System Cuts Roof Framing Cost by 30%
The design was based on requirements for minimally obstructed sight lines (Robin Hood Dell Open-Air Theater, Philadelphia, Pa.) for outdoor seating and a tight construction budget of $4,500,000....
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