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26. Bridges 
The plan of the driveway and path systems called for the 
construction of six bridges; three of these, first, the lake 
bridge, crossing the valley of the lakes near the museum 
building; second, the long bridge, which carries the drive- 
way across the valley of the Bronx River north of the hem- 
lock forest; and, third, the upper bridge which crosses the 
Bronx River at the northern end of the Garden, have been 
carried out in masonry arches from designs by Mr. John R. 
Brinley, landscape engineer of the Garden. A unique boul- 
der foot-bridge of five arches, just at the northern end of the 
hemlock forest was built from designs by the same engineer. 
The concrete-steel bridge spanning the gorge of the Bronx 
below the waterfall was built by the Park Department; 
and the sixth bridge in the plan is a foot-bridge, temporarily 
built of wood, ultimately designed in concrete, crossing the 
Bronx River in the north meadows. 
The bridge dedicated to Linnaeus, which carries the Pel- 
ham Parkway across the river, is appropriately located 
between the Botanical Garden and the Zoological Park. 
27. Water Supply and Drainage 
The water supply has also been constructed in accordance 
with the general plan and the system has been extended 
from year to year as the development of the grounds 
proceeded. Drinking fountains and public comfort stations 
have been erected at various points. 
The drainage of the grounds has been carried out in ac- 
cordance with a well-studied original plan, which provides 
outlets for the surface drainage for the most part either into 
the lakes or into the river, very little of it being taken into 
the sewers. Only a small portion of the drainage system 
still remains to be built. 
28. Shade Trees and Border Screens 
The park treatment further calls for the planting of 
shade trees where these are needed along the driveways, 
