[23 37 
Seport of the Board of EngineerSf for the impriyvement of the Harhor 
of Erie. 
IIST OF DRAWINGS ACCOMPANYING THE REPORT. 
1. Sketch of Lake Erie. 
2, 3. Details of Dike, Embankments, and Piers. 
4. A chart of Presque Isle Bay, (Erie Harbor.) 
To which is annexed. 
An estimate on the supposition that the current will deeper* 
y. 
the channel. And 
6. An estimate on the supposition that dredging must be re- 
sorted to. 
