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necting channels in the Great Lakes to depths commensurate with the seaway. The other is the deepening of the major harbors to accommodate the shipping which will be able to use the seaway and the connecting channels.

Among the projects required to permit deep-draft shipping to pass between the lakes is the replacement of the existing Poe lock in the St. Marys River at Sault Ste. Marie, Mich. This lock is a masonry structure completed in 1896. The new lock will be 800 feet long, 100 feet wide and 32 feet deep. It was authorized by the act of July 24, 1946 (Public Law 525 of the 79th Cong.) in accordance with House Document 335 of the 80th Congress. The estimated cost of the structure is $40,100,000. A total of $358,000 has been made available through the fiscal year 1959 for preconstruction planning, and an additional $367,000 is contained in the pending public works appropriation bill for the fiscal year 1960. These funds will complete the preconstruction planning and will permit work to get underway in the fiscal year 1961.

As a member of the Committee on Public Works and as chairman of the Subcommittee on Rivers and Harbors no one has shown greater leadership than John A. Blatnik in all projects needed for making the goal of deep-draft navigation available to the Great Lakes. His dauntless championship of the St. Lawrence Seaway over a long period of years and his persistent and successful efforts for deep-draft harbor improvements and deep-draft connecting channels on the Great Lakes is considered by the committee to be one of the greatest contributions made toward the overall Great Lakes-St. Lawrence waterway system. The committee considers it a fitting tribute that the new lock to replace the existing Poe lock be named after the Honorable John A. Blatnik, Member of Congress. ighth District of Minnesota and voted unanimously to report H.R. 7808.

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JUNE 23, 1959.-Committed to the Committee of the Whole House
on the State of the Union and ordered to be printed

59014 Res., Vol. 4, 0-61

UNITED STATES

GOVERNMENT PRINTING OFFICE

WASHINGTON: 1959

COMMITTEE ON SCIENCE AND ASTRONAUTICS

OVERTON BROOKS, Louisiana, Chairman

JOHN W. McCORMACK, Massachusetts
GEORGE P. MILLER, California
OLIN E. TEAGUE, Teras
VICTOR L. ANFUSO, New York
B. F. SISK, California

ERWIN MITCHELL, Georgia
JAMES M. QUIGLEY, Pennsylvania
DAVID M. HALL, North Carolina
LEONARD G. WOLF, Iowa
JOSEPH E. KARTH, Minnesota
KEN HECHLER, West Virginia
EMILIO Q. DADDARIO, Connecticut
WALTER H. MOELLER, Ohio

DAVID S. KING, Utah

J. EDWARD ROUSH, Indiana

JOSEPH W. MARTIN, JR., Massachusetts
JAMES G. FULTON, Pennsylvania
GORDON L. MCDONOUGH, California
J. EDGAR CHENOWETH, Colorado
FRANK C. OSMERS, JB., New Jersey
WILLIAM K. VAN PELT, Wisconsin
A. D. BAUMHART, JR., Ohio
PERKINS BASS, New Hampshire
R. WALTER RIEHLMAN, New York,

CHARLES F. DUCANDER, Executive Director and Chief Counsel
DR. CHARLES S. SHELDON II, Technical Director
SPENCER M. BERESFORD, Special Counsel

PHILIP B. YEAGER, Special Consultant
JOHN A. CARSTARPHEN, Jr., Counsel
HARNEY S. BOGAN, Jr., Staff Consultant
RICHARD P. HINES, Staff Consultant

LT. COL. PAUL B. SCHUPPENER, Staff Consultant
RAYMOND WILCOVE, Staff Consultant

LETTER OF TRANSMITTAL

HOUSE OF RepresentaTIVES,

COMMITTEE ON SCIENCE AND ASTRONAUTICS,
Washington, D.C., June 5, 1959.

Hon. OVERTON BROOKS,

Chairman, Committee on Science and Astronautics.

Dear Mr. CHAIRMAN: I am forwarding herewith for committee consideration a report on "Nuclear Explosions in Space" prepared by Dr. Charles S. Sheldon II, technical director of the committee and reviewed by the other members of the professional staff.

This report is based on an executive hearing of the committee which has in large part since been declassified, and only those parts which the Department of Defense reported to us to be free from classified security information have been used in drafting the report. The witnesses were Dr. Herbert F. York, Director of Defense Research and Engineering, and Dr. Frank Shelton, Technical Director of the Armed Forces Special Weapons Project.

The report summarizes the nonclassified parts of the testimony, and incorporates some general committee views on this important subject.

CHARLES F. DUCANDER, Executive Director and Chief Counsel.

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