The combined interest and sinking fund charge consists of interest at the rate of 3 per cent. per annum upon the cost of plant and the aggregate of annuities at 3 per cent., which will provide for the renewal of the buildings in fifty years, engines in thirty years and boilers in fifteen years.

The cost of pumping from the ponds and wells delivering into the aqueduct in the old and new watersheds was as follows for the year 1899:

Old Watershed (36,618 gallons pumped daily):

The aggregate annual cost of pumping in connection with the Brooklyn municipal water service for the year 1899 was as follows, including interest and sinking fund charges:

The aggregate cost of pumping, averaged per million gallons of the total supply furnished by the municipal water service in the borough is as follows:

Operating expenses..

$13.035

Interest and sinking fund..

3.505

Total cost of pumping per million gallons of the]

supply

$16.54

V.

BOROUGH OF QUEENS.

The aggregate land area of the Borough of Queens is 79,347 acres; or, excluding islands in Jamaica Bay, 76,659 acres. The range of low hills which intersects the borough from east to west rises at the highest points, near Jamaica, to about 200 feet above tide, necessitating a High Service district in the case of Holliswood. The area of greater elevation than 60 feet above tide is 2,630 acres.

Municipal waterworks supply the former Long Island City and the former villages of Flushing, College Point and Whitestone. Private water companies to the number of five operate exclusively in the other parts of the borough.

Long Island City.

The water plant of Long Island City, the present First Ward of the borough, consists of three pumping stations located in the ward, and 23.19 miles of pipe. In addition to the public mains, about five miles of private mains are laid in the streets. There is no reservoir or standpipe. The average daily consumption for the year 1899 was 4,444,000 gallons, of which 2,107,600 gallons were furnished by the city's pumping stations and 2,336,400 gallons were purchased by the borough from the Citizens' Water Company of Newtown. There are 3,800 taps.

Station No. 1, located in Vandam street, contains two pumping engines; combined capacity, 5,000,000 gallons; average daily pumpage in 1899, 682,800 gallons.

Station No. 2, located in Cabinet street, contains two pumping engines; combined capacity, 4,000,000 gallons; average daily pumpage in 1899, 803,000 gallons.

Station No. 3, located in Grove street, contains one pumping engine; capacity, 1,000,000 gallons; average daily pumpage for 1899, 621,800 gallons.

Flushing.

The water plant of Flushing consists of a pumping station, a standpipe and 15.4 miles of pipe. The average daily consumption

for the year 1899 was 980,000 gallons, taken from the city's wells. Number of taps, 2,257.

Pumping Station, located on Broadway, Bayside, contains two pumping engines; combined capacity, 3,500,000 gallons. Average daily pumpage in 1899, 980,000 gallons.

College Point.

The water plant of College Point consists of a pumping station, a standpipe and 15.42 miles of pipes. The average daily consumption for the year 1899 was 622,700 gallons. Number of taps, 1,064.

Pumping Station, located on Fresh Meadow Road, Flushing, contains two pumping engines; combined capacity, 3,200,000 gallons; average daily pumpage in 1899, 622,700 gallons.

Whitestone.

The water plant of Whitestone consists of two pumping stations, a standpipe and 10.42 miles of pipe. The average daily consumption for the year 1899 was 181,000 gallons. Number of taps, 510.

Station No. 1, located on Lawrence avenue, Whitestone; contains one pumping engine, of 1,000,00 gallons capacity; average daily pumpage in 1899 was 181,000 gallons.

Station No. 2, located on Thirty-first street, Whitestone; contains one pumping engine of 900,000 gallons capacity. This is a reserve station, and was not used in 1899.

For details of pumping plants, municipal and private, in Queens, reference is made to the tables accompanying this report.

VI.

BOROUGH OF RICHMOND.

The aggregate land area of Staten Island, constituting the Borough of Richmond, is 36,600 acres. Much of its surface is hilly and quite elevated. An aggregate area of 700 acres lies at an elevation greater than 300 feet above tide; 2,900 acres at an elevation greater than 200 feet above tide; and 7,975 acres at an elevation greater than 100 feet above tide. Within the more populated area the ground rises, in Edgewater, to an elevation of 375 feet, and in New Brighton to an elevation of 288 feet above

tide, necessitating the formation of High Service districts in these places. The maximum elevation within the borough is 413 feet above tide, on Ocean Terrace Road in the former Town of Middletown. The entire water supply of the island is obtained by pumping from driven wells within its limits, some of which are located upon elevated ground.

A small municipal plant supplies water to the village of Tottenville, at the southern extremity of the island. The village of New Dorp, on the south side of the island, and the larger communities of New Brighton and Edgewater, at the eastern end of the island, are each supplied by private water companies.

Tottenville.

The city's waterworks at Tottenville consist of a pumping station, standpipe and 6.1 miles of distributing mains. The average daily consumption for the year 1899 was 80,000 gallons. Number of taps, 181.

Pumping Station, located on Central avenue, contains two pumping engines; combined capacity, 1,000,000 gallons. Average daily pumpage in 1899, 80,000 gallons.

For details of the municipal and private pumping plants and the service furnished by them in Richmond, reference is made to the tables accompanying this report.

Respectfully submitted,

NEW YORK, April 15, 1900.

LEBBEUS B. WARD.

Tables Accompanying Report on Pumping Stations.

1. PLANTS OF PRIVATE WATER COMPANIES OPERATING IN THE SEVERAL Boroughs.

II. EFFECT OF GROUND WATER PUMPING IN DIMINISHING STREAM FLOW IN BROOKLYN WATERSHED, Etc.

III. TABLE OF DETAILS OF PUMPING STATIONS IN the] Several BOROUGHS.

The location of each pumping station in the city is designated upon the map, showing the present distribution of water in the city, attached to the report of J. J. R. Croes, C. E.

Every organized water company in the city has its own pumping works; the only dependent areas of distribution are those of certain real estate companies.