SIXTH ANNUAL REPORT. 81 



Sezccr and Water Systems. — On June 13th a contract was made 

 with Stone & Thurston for the construction of a trunk sewer, 

 with various branches, and additional water-supply lines calcu- 

 lated to render both the sewers and water systems of the Park 

 practically complete. The amount of the contract for both was 

 $10,406. 



Starting in at West Farms, an 18-inch trunk sewer of vitrified 

 pipe was laid in concrete through the lower Buffalo Range, 

 along the eastern foot of Rocking Stone Hill, past the Polar 

 Bears' Den and the Beaver Pond, and westward across the head 

 of Beaver Valley. One branch was built along the eastern side 

 of Baird Court to the north end of the Primates' House. The 

 main line went through the elephant corrals to the south end 

 of the Lion House, and another branch led up to the end of the 

 Reptile House sewer, near the Wolf Dens. A short line was 

 built from Kingsbridge Road to the site of the Antelope House, 

 and another drained the stagnant pond in the Buffalo Range. 

 Naturally, the final acquisition of a complete sewer system, with 

 all large buildings properly connected with it, is a very great 

 relief to the Park ; and beyond doubt the general health of both 

 men and animals will be promoted. The total length of the 

 sewers laid in the Park under this contract was 5,369 feet. All 

 that now remains in sewer-construction is the short laterals to 

 connect new buildings as they are erected. 



The principal water-lines constructed consisted of 4-inch 

 mains leading to the Lions' and Primates' Houses, and the site 

 of the Elephant House. Advantage was taken of this oppor- 

 tunity to form a junction between the Bird House main (6-inch) 

 and the 4-inch main entering the Park through the Elk Range. 

 The complete circuit thus made constitutes a timely precaution 

 against any cutting off of the water-supply of an important 

 building. If one main meets with an accident and becomes in- 

 operative, the other will supply the entire system. The total 

 length of water-lines put down under this contract was 1,754 

 feet, with 24 manholes, and 3 fire-hydrants. 



Dam at Waterfall. — Early in the year the pressure of flood- 

 water against an old stone foundation at the waterfall made a 

 clean breach in the wall. In a few hours thereafter Lake Agas- 

 siz was a malarious expanse of mud, with a narrow stream run- 

 ning through it. To have repaired the old wall in a substantial 



