Page 62 - Fair, Geyer, and Okun's Water and wastewater engineering : water supply and wastewater removal

JWCL344_ch01_001-028.qxd 8/2/10 9:12 PM Page 25

1.11 Individual Water Systems 25

Drainage Removable cover
diversion ditch
Valve
stem Screened
overflow
25 ft
or more
Rock drain

Water-bearing
sand or gravel Screen
Screened
Valve drain

Impervious stratum
Supply line
to storage
Figure 1.11 Water Supply from Spring (After U.S. Public Health Service)
Conversion factor: 1 ft 0.3048 m.

1˝ minimum Pump
above base
Manhole
5˝
9˝

6˝
20˝ square
1´–6˝

10´–0˝ minimum Cemented

joints

Concrete
36˝ diam

Gravel

Stone or Figure 1.12 Water Supply
coarse gravel from Dug Well (After U.S.
Department of Agriculture)
Conversion factors:
1 1 ft 0.3048 m;
1 1 in. 2.54 cm