SIXTEENTH ANNUAL REPORT 85 
the 2,500 square feet of telford and tar-macadam road, amounted 
only to $342.05. This amount has already been saved by the 
avoidance of the extra handling of hay, oats, corn and other 
supplies that heretofore has been necessary. 
A sixteen-foot extension was built upon the ice cream plant 
in order to make possible the increased amount of work neces- 
sary in that place. The cost was $230. 
At the expense of $150, a two-inch water-main was laid to 
the new Bear Dens. 
The water area of the Duck Aviary, which was greatly 
reduced by filling last year, was concreted, and a new sewer 
connection was made. This enables the Duck Aviary to be flushed 
frequently and kept clean. The expense of this work was $266. 
Karly in the season it became apparent that Silver King, the 
Rainey polar bear, was in need of a bathing pool. Accordingly a 
pool ten feet by twenty feet in size, surmounted by cage work of 
great strength, was built and connected with the water and sewer 
lines, for the sum of $1,000. 
The building of the Eagle Aviary and Zebra House necessi- 
tated the laying of new water pipes, at a cost of $175. 
The strip of ground adjacent to the Crotona Entrance, which 
had been in unsatisfactory condition ever since the establishment 
of the Park, was graded, planted and fenced in, and about 310 
yards of good soil were hauled here at no cost to the city. The 
fence is of a type new to the Park, and has proven very satis- 
factory. The cost of this work was $650. 
In order to provide additional shelter for the herd of musk- 
oxen a log shelter was built on the east side of the Rocky Moun- 
tain Goat House, at an expense of $200. 
Near the end of the working season of 1911, the Beaver 
Pond was taken in hand. About 500 yards of sticky, black mud 
were removed from the bottom and sides, laying bare the hard 
clay sub-soil; and about sixty feet of the upper end of the pond. 
and the entire bottom, were filled in with 1,100 yards of good solid 
earth. The entire bottom of the pond was then paved with stone, 
upon which was deposited a layer of crushed stone, necessitating 
the use of 520 yards of material. Very little remains to be done 
with the Beaver Pond to place this installation in an entirely 
satisfactory condition. The entire cost of this work will probably 
not exceed $2,500. 
In the Ostrich House two more cages were enclosed in wood 
and glass, costing $100, for the purpose of placing two more 
African ostriches on a fresh-air basis throughout the year. 
