The Evolution of Sludge Thickening Practice
An analysis of contemporary thickening practice is presented with a brief review of the genesis of each type of thickening. A summary of thickening capital and operating costs for three...
Improved Centrifuge Designs for High Cake Solids
The new generation of advanced centrifuges pioneered by Humboldt Wedag can readily produce 30 ? 2% TS cake on most raw and digested primary and waste activated sludge, wherein the primary...
Proposal for Combining Expert Systems and Canal Design
Expert Systems can be combined with a computer aided design methodology to develop a cost effective canal system. The System should consider a feasible set of design alternatives to satisfy...
Optimal Real-Time Pump and Irrigation Scheduling for Center-Pivot Sprinkler Systems
A comprehensive scheduling algorithm is presented for optimally integrating irrigation and pump operational decisions in center-pivot sprinkler systems. Dynamic programming successive...
Hydropower Development under the Utility Concept of Least Cost Utility Planning
The impetus behind 'Least Cost Utility Planning' (LCUP) is that if new generation or purchased power could be deferred, the resultant savings could be used to...
Case Study Incremental Approach to Cost Analysis for Improvements to Wise Powerhouse Penstock
In 1980, Pacific Gas and Electric Company (PG&E) began studying the addition of a second powerhouse to the existing Wise Hydroelectric Project. Because of the existing project...
Financing and Marketing Feasibility Tests for Proposed Federal Hydroelectric Power Projects
The Southwestern Power Administration (SWPA), an agency of the Department of Energy, is responsible for marketing the power and energy produced at Federal hydroelectric power projects...
Capital Cost Modelling for Micro-Hydro Appraisal
Empirical capital cost models for mini- and micro-hydro installations have not been validated with consistent site information. This paper reviews cost modelling techniques and describes...
Affordable Housing
a Challenge to Civil Engineers
This conference proceedings, which consists of 25 papers presented at the National Conference on Affordable Housing held in Miami, Florida on December 6-8, 1989, discusses ways that the...
Affordable Housing and the Civil Engineer
The Joint Venture for Affordable Housing (JVAH) Demonstration. Program accomplished the goal and reduced the first time cost of housing by up to 30% through the use of innovative methods...
Regulatory Impact Statements
This paper suggests the issue of regulatory impacts be addressed in a manner analogous to environmental impacts, using a timely, comprehensive methodology. By 'timely'...
A Model Cost Comparison Between Construction Management and General Contracting
This paper presents a model cost comparison between general contracting and construction management in a typical mid-rise 5-10 story office building. The model separates cost of construction...
Building Commissioning
In order to detect and correct defects in a timely, cost effective manner, HVAC system commissioning has recently been used as part of building construction. Preliminary evidence suggests...
An Effective Cost Control System
Project budgeting consists of converting the capital cost estimate into accountable cost centers by physical or process area and classifications of work. The primary purpose of the project...
The Cost of Quality: A Management Tool
In design and construction of engineered facilities, the cost of quality is a major cost item; perhaps exceeding one fourth the total installed project cost. A simple, flexible Quality...
Tunnel Maintenance Operations
Maintenance considerations during both the design and operational phases are very important to good tunnel maintenance. The use of proper materials able to withstand the rigorous environment...
Reflections on Design of a Turnkey Hydro-Power Project?Calaveras, California
Developing the Calaveras project under a turnkey agreement has shown that: (1) some 2 years can be saved, (2) cash flow for the owner is significantly delayed, because engineering is first...
Issues in Computer Based Design/Construction Integration
Design and construction processes are widely regarded as too splintered for industry effectiveness. By improving communication and process integration, reduced costs and improved facilities...
Real-Time Project Tracking
Too often project tracking is based on a job costing program which charges costs to the project based upon invoices from vendors and payrolls of employees. The information obtained from...
A Model for Construction Quality and Productivity
A set of necessary and sufficient conditions for construction quality is developed. Numerical simulations are then performed to evaluate the effectiveness of various quality improvement...
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