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sewerage system is extended to the land bordering the Park 
way. We, therefore, recommend that a pipe connection be 
made from the point where this stream flows under Webster 
Avenue, to the culvert above mentioned; the two streams, 
thus united, would yield a very abundant water supply for 
these lakes. In case any serious contamination of these 
streams should take place, the lakes may be fed from the city 
water supply, as in Central Park. 
A small pond is planned for the bog garden, as shown on 
the map, as part of the drainage system. 
Two ponds for hardy aquatics are located on the eastern 
side of the Bronx, south of the transverse driveway. 
The total water area, exclusive of the Bronx, is about 6 
acres. 
17. The Bronx. 
It is recommended that the Bronx River be lowered about 
two feet from the Lorillard Mansion to the northern end of 
the Park, by removing about two feet of stone from the top of 
the mill dam at the Lorillard Mansion, in order to effect the 
successful drainage of the northern part of the site, to reduce 
the amount of back water in the valley in the vicinity of the 
present ‘‘ Blue Bridge,” and to permit the establishment of the 
lake levels, as above described, all of which is necessary to 
insure good sanitary conditions in the park and the surround- 
ing country. The mill dam was erected by the Lorillard 
family in order to provide water power for tobacco and snuff 
mills at the southern end of the gorge. Its usefulness for this 
purpose has long passed away. and it is at present a very un- 
natural feature. The lowering of the dam, as above indicated, 
will cause a narrowing of the stream for a distance of about 
800 feet south from the present ‘‘ Blue Bridge,” and will per- 
mit the beautifying of the eastern bank of the river along that 
stretch, which at present is occupied by overgrown swamps 
and back water pools, the western side being formed by the 
Hemlock Forest. We regard the present water level of the 
dam, with its straight front, as altogether out of place in the 
