XXIV.-OBSTRUCTIONS TO THE ASCENT OF FISH IN CERTAIN 



KIVERS. 



For the purpose of more accurate iuforiiiatiou as to the accessibility of 

 CBrtaiu iuterior waters to salmon, shad, and other anadromous fishes, 

 passing upward from the portion of the ocean or of the great lakes to 

 which the former are tributary, I secured the valuable co-operation of 

 certain gentlemen, whose reports are herewith communicated. With 

 that of Mr. E. M. Stilwell, fish-commissioner of Maine, has been incor- 

 porated a similar communication from Mr. Charles G. Atkins. Dr. jI. C. 

 Edmunds has furnished a report on the streams connected with Lake 

 Champlain and the Saint Lawrence River. Both these articles are 

 accompanied by maps. Other articles of less magnitude, but of much 

 interest, have been supplied of some rivers in Yirgiuia,by Mr. McKennie, 

 through Thaddeus Xorris, and of tributaries of Lake Michigan, by Mr. 

 J. F. lugalls and by Mr. Milner. 



A— OBSTRUCTIONS IX THE RIVERS OF MAIXE. 



By E. M. Stilwell. 



SAINT CROIX RliVER. 



1. Calais, fifteen miles*; Union Mills dam, according to tide, 10 feet. 



2. Barring, nineteen miles ; dam, 7 feet. 



3. West Branch, forty miles ; Princeton dam, 8 feet. 



4. Tanceborough, E. B., fifty-seven miles; dam and fish-way. 



5. Forest City, eighty-two miles; dam, 10 feet. 



PENXAQUAX RIVER. 



1. One and a half miles from mouth : grist-mill dam. 7 feet ; saw-mill 

 dam, 9i feet. 



2. Iron Forks, one mile ; dam, 25 feet. 



3. Little Falls, four miles; dam, 20 feet, 



DENNYS RIVER.T 



1. Dennysville dam, 10 feet: Dennysville dam, 1^ miles; 12 feet; 

 fish-way. 



2. Millwaukie, 4 miles ; dam, 14 feet ; fish-way. 



3. Meddybemps, 20 miles; dam, 10 feet. 



* Distance from mouth of river. 

 t See map for dams on tributary. 



