Presented is a plan of improvement for the harbor at San Diego, California, was authorized by the River and Harbor Act approved 13 August 1968 (Public Law 90-483, 90th Congress, 2d Session), to provide adequate waterways for access to newly constructed terminals and to meet the growing demand for additional marine-oriented industry. The district engineer now submits a recommended plan of improvement which consists of widening and straightening sections of the north bay channel; deeping and widening the central bay channel; deeping, widening and extending the south bay channel.