132 
ECONOMIC GEOLOGY OF AMITY QUADRANGLE, PA. 
The following table gives various statistics concerning the reser- 
voirs : 
Statistics of reservoirs at Washington, a 
Area acres . 
Length feet . 
Width do... 
Depth do.. . 
Storage capacity gallons. 
Area of watershed .square miles. 
No 1. 
750 
320 
11,000,000 
No. 2. 
3^ 
440 
320 
6 
0,000,000 
No. 3. 
30 
3,000 
d700 
<*31 
106,000,000 
2 
No 4. 
65 
5,000 
d 1,000 
d 2 
600,000,000 
4 
High- 
service res 
ervoir. 
M82 
r242 
MOO 
<' 170 
20 
roo.ooo 
a From memorandum issued bj Citizens' Water Company. & Bottom. crop. d At breast. 
The high-service reservoir is situated on the hill southwest of 
Washington, at an elevation of about 1,330 feet, 309 feet above the 
pumping station and 21)3 feel higher than the lowest point in town. 
The pressure is 70 to 140 pounds. The total storage capacity is 
726,700,000 gallons, the capacity of the pump 3,000,000 gallons 
every twenty-four hours. The consumption in 190! 
was 
less than 
1,000,000 gallons per day. It will bo seen, therefore, that an abun- 
dant supply is assured to Washington for some time. 
All water furnished to consumers is first passed through a gravity 
sand-filter plant. This plant consists of sedimentation and settling 
tanks and four large automatic sand-filter tanks, which are cleansed 
every day by machinery. The capacity is between 3,000,000 and 
4,000,000 gallons of water per day. 
OTHER TOWN SUPPLIES. 
The majority of the wells supplying the settlements along Peters 
Creek and the village of Houston, on Chartiers Creek, are very shal- 
low. In the village of Bentleyville most of the residents have dug 
wells, but for two or three years a number of drilled wells have 
been in use. The deepest of these is 240 feet deep, but the major- 
ity are only 80 to 90 feet. There are but two springs in use in the 
village. The supply for the individual houses in the town of Ells- 
worth is also from wells, the average depth being 100 feet. On a 
branch of Pigeon Creek, above the Ellsworth collieries Nos. 3 and 4, 
is situated a small reservoir to supply the coke ovens. This com- 
pany has lately constructed on the Eli Tombaugh farim on Center 
Branch of Pigeon Creek, a reservoir which has an estimated capac- 
ity of 12,000,000 gallons, and is, like the other, used to supply water 
to the plant. 
