Cook Plant preoperational studies 1970 / John C. Ayers ... [et al.].

This photographic record has been supplemented by overflights by both our
Dr. O'Hara and by the Company's photographer.
In addition, Dr. O'Hara and Mr. Jon Barnes of Indiana and Michigan Electric
have conducted surveys of the ice barrier on foot.
From the total record of these activities it has been possible to follow
the development of the ice barrier, to gain some insight into its nature and
behavior during its maturity, and to follow its demise during the spring breakup.
These studies will be pursued through the 1971 breakup and be covered in
a report on Winter Operations.
D. EFFECTS OF EXISTING THERMAL DISCHARGES ON LOCAL ICE BARRIERS
In February Dr. O'Hara overflew the Lake Michigan outfalls from Big Rock
to and including Bailly Station at Burns Harbor. The results will be included
in the report on Winter Operations. In March Mr. William Yocum investigated
shore ice at Campbell Plant and Michigan City. His results will also be included in the winter report.
E. EFFECTS OF RADIOACTIVE WASTES IN THE AQUATIC ENVIRONMENT
E.1 Gamma Scan of Bottom Sediments
This section of the work involves the development and use of a mobile
underwater device for measuring, in place, the gamma radiation of the lake
bottom. The device was developed by Dr. Phillip A. Plato and Mr. Dale E. Gelskey
under the supervision of Prof. G. Hoyt Whipple, all of the Radiological Health
Group of the Department of Environmental and Industrial Health, the University
of Michigan.

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