5. SUMMARY 
The entire Great Lakes drainage basin was reviewed for sources of 
hydrographic and meteorological data, patentially applicable to studies 
of Great Lakes hydrography and fisheries Agencies which were found to 
obtain either or both of these types of data were: water treatment 
plants; power plants; industrial concerns; U. S. Coast Guard; paper mills; 
Sanitary District Observers; U. S. Weather Bureau First Order, Second 
Order and Cooperative stations; Canadian Meteorological Division Class 
I, Il, III, and c stations; Y. S. Lake Survey; Canadian Hydrographic 
Service; U. S. Geological Survey; Canadian Department of Northern Affairs 
and National Resources, Water Resources Branch; independent research 
installations; and several miscellaneous uncategorized agencies. 
Tables 4 and 5 present a summarization of knowledge of data sources 
9 
appearing in Tables 1, 2, and 3. Table 4, entitled Summary of 
cent of agencies contained within each source type that have usable or 
unusable data and those agencies with which no contact was possible 
(no contact}. Following the format utilized throughout this report, 
these agencies have been categorized as either onshore or inland. Entries 
appearing in tke usable column have been derived from Tables 1 and 2. 
Entries in the unusable column have been derived from the first two 
columns of Table 3, and entries in the no contact column, from the third 
column of Table 3, 
For example, 9/7 water treatment plants were located which utilize 
Great Lakes water. These plants constituted 8.3 per cent of the total 
potential sources located. Of these, 73 (75 per cent) possessed usable 
data, 22 (23 per cent) possessed no data of use to the purposes of this 
investigation, and 2 (2 per cent) could not, for various reasons, be 
adequately ascertained. 
A total of 1177 separate possible data sources were located in the 
drainage basin. Of the total, slightly less than half (44.2 per cent) 
are located within two miles of the Lake shores (onshore), whereas 
55.8 per cent are more than two miles from the shoreline (inland). 
A high percentage of all onshore agencies have proved to possess 
apparently usable meteorological and/or hydrographic data, namely, 91 
per cent; only 6 per cent of the reviewed data is unusable and 3 per cent 
is for plants with which no contact was established. 
The percentage distribution of onshore agencies by type of installa- 
tion is of interest as shown in Table 4. The Coast Guard, meteorological 
substations, and water treatment plants all represent, numerically, data 
sources of the same order of magnitude. The numbers of data to be 
found in power plants and industries, and from the U. S. Lake Survey and 
the Canadian Hydrographic Service are each about half of the percentage 
represented by the aforementioned three source types. Other meteoro- 
logical sources and the Sanitary District Observers are, in turn, nearly 
equal and each less than half the percentage of the latter two source 
types. There are very few paper mills, research, and special organiza- 
tions that were uncovered as data sources by the project (together 
about 1 per cent of the total). 
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