Alternating Direction Oxidation Ditches?A Cost Saving Technology from Denmark
A soon to be released EPA report claims that in Denmark, small alternating direction oxidation ditches (ADOD) save as much as 70% of the cost for conventional oxidation ditches. The alternating...
Comprehensive Rehabilitation Results From Stege Sanitary District
Seven sewer agencies, including Stege Sanitary District, in the East Bay of the San Francisco Bay Area embarked on a 20-year capital improvement program in 1987. The 300 million construction...
Distribution System: Cost of Repair and Replacement
The Safe Drinking Water Act of 1974 mandates that EPA be concerned with the supply of potable water to the consumer. Although most emphasis has been placed on water quality as it leves...
Costing Contingencies
Estimating the cost of constructing a tunnel is an art rather than a science. The unknowns are too great to predict costs relianblbly. On the other hand, owners need cost estimates in...
Quality: Out of the Manual and Into the Field
The intent of ASCE's
Getting the VOCs Out of Well Water
Two technologies are successfully removing volatile organic chemicals (VOCs) from groundwater supplies. Not surprisingly, since the application is new, many of the designs were not optimized...
Evaluation Procedures for Hydrologic Safety of Dams
Procedures are proposed for selecting the safety design flood for both new and existing dams. The procedures are based on a quantitative risk assessment in which the likelihood and consequences...
Marginal Cost Pricing: Is Water Different?
The objectives of public utility pricing are generally acknowledged to include a desire for efficient allocation of community resources, equity in allocating cost shares, stable revenues...
Alternatives to the Precommensuration of Costs, Benefits, Risks, and Time
The thesis advanced in this paper is that benefit-cost analysis, the present-value-of-cost (and benefit) approach, and the expected value of damage as a measure of risk all share a faulty...
Hydrologiic Risk Analysis for Small Dams in Missouri
A methodology is presented for calculating the risk cost for a dam based on probabilities for rainfall depth, antecedent moisture condition, rainfall time distribution, initial reservoir...
Basing Options for Lunar Oxygen for Manned Mars Missions
The use of lunar oxygen to support lunar space transportation reduces Earth launch mass requirements by a factor of 2. In this paper, the authors show that lunar oxygen can also reduce...
Telerobotics Design Issues for Space Construction
The efforts of a recent study aimed at identifying key issues and trade-offs associated with using a Flight Telerobotic Servicer (FTS) to aid in Space Station construction phase tasks...
Space Station - New Venture/Old Problem
Four key operations-related costs are associated with the Space Station: (1) transportation, (2) data management, (3) sustaining engineering, and (4) integrated logistics. Life cycle cost...
Benefit-Cost Analysis: Past and Future Directions
As implemented at the State level, highway resource allocation models fail to consider the travel time delay and crashes that result from construction. They use the economic costs of crashes...
Highway Safety; Moving from Fantasy to Reality
An assessment of the effects of highway safety program on the reduction of traffic accidents is made. The annual traffic death rate is currently 47,900. The paper discusses whether present...
Zapping Hazwastes
Electromagnetic energy, applied in situ, successfully removes contaminants entrapped in soil by vaporizing them. Recent test using radio frequency have successfully removed up to 99% of...
Consulting Engineering
A Guide for the Engagement of Engineering Services
ASCE Manual No. 45, Consulting Engineering?A Guide for the Engagement of Engineering Services, outlines the functions of the consulting engineer in serving a client, the types of services...
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,...
Guide to Employment Conditions for Civil Engineers
ASCE Manual 55, ASCE Guide to Employment Conditions for Civil Engineers, provides a guide to a mutually satisfying relationship between the employer and the professional employee, and...
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...
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