The waterways experiment station is very active in constructing and operating models and reporting results of experimental tests for proposed and authorized improvements related to civil and military projects for the Department, its divisions and districts, and other agencies throughout the United States and abroad.

Surveys and reports prescribed under the existing project and as called for by congressional or departmental directives are made as required. Reports on tributary streams authorized pursuant to the act of January 21, 1927, when presented to the Mississippi River Commission in compliance with section 10 of the act of May 15, 1928, are considered and the conclusions and recommendations of the Commission thereon are submitted to the Department.

Total costs under the existing project incurred from United States and contributed funds to June 30, 1945, were $512,359,584.15 for new work and maintenance (see table G-1), and $10,681,807.87 for emergency repairs. Similarly, total costs for construction and maintenance of levees under the existing project and expenditures incurred therefor by non-Federal agencies are given in table G-2.

PROPOSED OPERATIONS

The balance unexpended on June 30, 1945, will be applied during the fiscal year 1946 in the prosecution of new work and maintenance under the project. It is estimated that there will be no available balance from prior appropriations on June 30, 1946.

Enlargement of the Mississippi River project levees above Old River in the New Orleans, Vicksburg, and Memphis districts to 1941 standard grade and cross section will be prosecuted to the extent of available funds. About 7 miles of bank revetment and 7,000 linear feet of pile and abatis dikes will be constructed. Existing flood-control structures will be maintained and operated. Improvement and maintenance dredging will be accomplished as required to maintain an efficient channel for navigation and flood control. In the New Orleans district, construction of the highlevel crossing for State Highway No. 190 across the Morganza floodway between Lottie and Krotz Springs will be continued. In the Vicksburg district, levee construction and channel improvement in connection with Yazoo Basin headwater flood control will be continued.

Preparation of reports called for by congressional or departmental directives will be continued. Surveys and observations pertinent to the existing project will be made and results published. Designs, plans, and specifications for authorized improvements will be developed. The waterways experiment station will continue to prosecute model studies and tests for proposed and authorized civil and military works for the Department and other agencies as required.

During the fiscal year 1947, $48,000,000 can be profitably expended for new work, $11,000,000 for maintenance and $1,000,000 for emergency repairs.

White Castle, La..

* Squares=10 by 10 feet (100 square feet).

1 Revision.

No longer considered effective.

3 Masked by sand bar.

A=Asphalt; AC=Articulated concrete; FW-Framed willow; W=Willow mattress: CB Concrete blocks.