WAC 173-160-211   What are the recommended well diameters?  

TABLE 3

Recommended Well Diameters


Anticipated

Well Yield

in gpm
Nominal Size

of Pump Bowls

in inches
Optimum Size

of Well Casing

in inches
Less than 100 4 6 ID
75 to 175 5 8 ID
150 to 350 6 10 ID
300 to 700 8 12 ID
500 to 1000 10 14 OD
800 to 1800 12 16 OD
1200 to 3000 14 20 OD
2000 to 3800 16 24 OD
3000 to 6000 20 30 OD




[Statutory Authority: Chapter 18.104 RCW and RCW 43.21A.080. 98-08-032 (Order 97-08), § 173-160-211, filed 3/23/98, effective 4/23/98.]