396 NATIONAL OCEANOGRAPHIC PROGRAM—1965 
“nere frequently the elevctioa of the Water curface was measured as well 
the mateorolosical work, togethes with the secumulsted data, wes transterced 
to the U. S. Weather Bureau after its orcanizaticn. Deliable and systematic 
records of the leke Levels have been rsintained by the Lake Survey since 
1260. 
The Congressional Sundry Civil Act, eppsoved 4 June 1867, provided 
for “completing inprovement of channcl connecting waters of the Great Lakes 
between Chicago, Duluth, and Luffalo, inciuding necesscry observations 
and investigations .in conncctioa with the preservation of such channel 
depths." The first measurements of lalie outflows through the St. Marys 
and the St. Clair Rivers were made eae Lake Survey during the 1867 field 
season, providing necessary Laforuition for these luvestigations. The 
first measureconts of [ake ouetlows Exscush the Nlegera neal St. eneenee 
Rivers were also wade by the Lake Cuzyay in 1667. 
Gn 21 Moy 1898, the Gaszetesy on Vou avosoveds2 Leake Survey project: 
which included “careful odcucvations cud weccurcucats ef flow through the 
St. Clair and Letroit Rivess.” By allotscat from the pEpeapriaeton for 
investigetions of the LDoard of Engineers on Leep Waterways, the sphere of 
the 1898 discharge observations by the Lake Survey sas extencged to include 
measurements of the Niagara and St. Lawrence River flows. An exhaustive 
stuay of the influences waich affect the levels 2 the Gzcat Lakes was 
considesed Gx Guptete dipestence, invordss te detcemine the exteat to. 
waich the icke levels mignt) be sagulliced Gaceinywaskeveay Eke Ceathyor 
the improved aavigebie chenaels night best be preserved from reduction due 
to lozerinz of Lake levels, ALL cubscsuent copscspriaticas fer the Susvey 
