111 
All data sources in the drainage basin (or watershed) of the Lakes, 
that could be ascertained by the project, are listed. Tabulations are 
made geographically by state and province, but alphabetically by stations 
under each province and state. Accordingly, the geographical coordinates 
of inland stations are shown in degrees and minutes of arc. The type of 
data source is indicated in the second column; abbreviations have the 
following meanings: FO - USWB First Order; SO - USWB Second Order; 
Co - USWB Cooperative; I - CMD Class I; II, III, and c - CMD Classes 
II, III, and c, respectively; and R - research facility. Some locations 
have more than one First Order station. Usually one is located at an 
airport; hence the abbreviation Ap is used in the tabulations. If the 
installation is in the city, City is used, and if the facility is mili- 
tary, the following are used: NAS for Naval Air Stations, and AFB for Air 
Force Bases. The letters CAA and USCG refer to Civil Aeronautics Admin- 
istration and U. S. Coast Guard facilities, respectively. 
With respect to future use of the material compiled in Tables 1 and 
2, project personnel adjudged that data sources in close juxtaposition 
to the watershed boundary, but outside it, should be included in the 
tabulation. This procedure was justified on the grounds that meteoro- 
logical events (precipitation, for example), although occurring outside 
the basin would, nevertheless, be representative of conditions in the 
immediate vicinity of the basin boundary. The number and locations of 
extra-basin stations were arbitrarily selected. Here again, the stations 
outside the watershed used by the U. S. Lake Survey in computation of 
precipitation regimes for lake level studies were used as a basic group. 
In addition to these, several First Order and Class I stations were in- 
cluded even though they were located somewhat farther distant than most 
from the basin boundary. All stations outside the boundary are indi- 
cated in Table 2 by an asterisk preceding the location name. 
The same system for indicating length of record and parameters 
measured is used here that was employed in Table 1; that is, the numbers 
appearing in the columns to the right of the location specifications are 
years of record. Where it is known that an element is measured but the 
length of record is not known, "X" appears in the space. All parameters 
taken that are not specified in the table may be determined by consulting 
the reference given in the last column to the right. 
