Maintaining the Gateway to the Columbia Basin—A Plan for Improvementby Steve A. Chesser, Corps of Engineers, Portland, OR, USA,
Fong Grey, Corps of Engineers, Portland, OR, USA,
Abstract: Portland District has begun a Maintenance Improvement Program to recommend procedures to reduce annual operations and maintenance costs while providing safe and efficient ship passage in the Columbia River commensurate with navigation needs, engineering feasibility, and environmental quality. A Plan of Study for part of the Lower Columbia River Navigation Channel from mile 30 to mile 53. 5 has been developed. A Plan of Study was developed which includes field data collection, numerical modeling, sedimentation studies, and longterm monitoring. The results of the first year's effort include installation and calibration of a 2-D numerical model, collection of crucial flow and sediment data, and preliminary evaluation of specific problem areas.
Subject Headings: Maintenance | Navigation (waterway) | Field tests | Data processing | Numerical models | Numerical analysis | Model analysis | Data collection
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