The work of restoration in Delaware was miJ?velous in its 

 success. The fishuays in the Lackawaxen dam, put in jointly 

 by Pennsylvania and New York Corriniissions, gave one hundred 

 ifiiles more of the river to shad, .jdelded that much more area 

 for spawning purposes and enabled the people of the far upper 

 valley to once more enjoy a food fish of which they had long 

 been deprived. 



The report by Fish Protector Snyder to the Nevr York Commission of 

 Fisheries in l39C (New York Commission of Fisheries 1391) states: 



Since the building of the Lackawaxen Dam, hi or 50 years 

 ago, not a shad was seen above the dam imtil the spring of 

 1890, after the fishuays were put in, vhich have nrovcn a 

 great success. 



The Lackawaxen Dam, on the Delaware River near Lackawaxen, Pa., 

 was part of the Delaware Hudson Canal system which ceased operation about 

 1900. At about that tine ice jams carried away the dam, and it no longer 

 presented a barrier to fish migration. Appiirently the fish ladder sur- 

 mounting the dam on the Pennsylvania side of the river passed large num- 

 bers of shad for a period of about 10 years. Unfortunately, no records 

 have been found to indict..te the tj^pe of fishway, reasons for its apparent 

 success, or the magnitude of the run passing. 



Recently it beca.r.e known that shad successfully use a fishway 

 at Lawrence, Mass., on the Merrirnac River (Collins 195o) . This fishway 

 uses about ic' cubic feet of vjater a second, and the drop between pools is 

 C,6 foot. Because of pollution and lack of adequate spawning ground the 

 number of shad using the fishvjay is limited. 



Summary and Conclusions 



The Bonneville fishways, \jhile operated primaril:/ for the passage 

 of salmon, have successfully oassed large numbers of shad over the dam. 



Time of passage was influenced both by flow and by temperature, 

 but flow appeared to have the greater effect. Low water flows (and to 

 some extent high water temperatures) tended to result in earlier runs than 

 those occurring x-/hen high water flows (and lower water ten.eratures) nre- 

 vailed. These conditions affecting the runs at Bonneville apparently 

 affect shad in general in the Columbia River since there was a significant 

 correlation between time of run at Bonneville and time of commercial catch 

 of shad in the river below. 



28 



