OAR 690-210-0155
Additional Standards for Artesian Water Supply Wells

(1)

Water supply wells penetrating into an artesian aquifer shall have an upper oversize drillhole at least four inches greater in diameter than the nominal diameter of the permanent well casing to be installed. Watertight unperforated casing shall extend and be sealed at least five feet into the confining interval immediately overlying the artesian water-bearing zone. In all cases, a minimum of 18 feet of casing and casing seal will be required. If cement grout is placed by a suitable method from the bottom of the casing (Methods A, B, or D, in Appendix 210-3 and Figure 210-1), the diameter of the upper oversize drillhole shall be at least two inches larger than the nominal diameter of the permanent well casing.

(2)

To complete the well, inner casing, liner, or a well screen may be installed. When artesian pressures are encountered in the absence of a confining interval, casing and casing seal requirements shall be determined by the Director upon written application. In the alternative, the person constructing the well may construct the well in conformance with the minimum standards for artesian wells with a confining interval, set forth in section (1) of this rule.

(3)

If an artesian water supply well flows at land surface, the well shall be equipped with a control valve and a watertight mechanical cap, threaded or welded, so that all flow of water from the well can be completely stopped.

(4)

All flowing artesian wells shall be equipped with a pressure gauge placed on a dead- end line. A petcock valve shall be placed between the gauge and well casing. (See Figure 210-7).

(5)

All flowing artesian water supply wells shall be tested for artesian shut-in pressure in pounds per square inch and rate of flow in cubic feet per second, or gallons per minute, under free discharge conditions. This data shall be reported on the well report.
[ED. NOTE: Figures & Appendices referenced are available from the agency.]

Source: Rule 690-210-0155 — Additional Standards for Artesian Water Supply Wells, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=690-210-0155.

690‑210‑0005
Standards Apply to all Methods of Well Construction 690‑210‑0030
Placement of Water Supply Wells 690‑210‑0060
Explosives 690‑210‑0065
Hydrofracturing 690‑210‑0070
Injection Wells 690‑210‑0100
Mineralized or Contaminated Groundwater 690‑210‑0130
Sealing of Wells in Unconsolidated Formations Without Significant Clay Beds 690‑210‑0140
Sealing of Water Supply Wells in Unconsolidated Formations with Significant Clay Beds 690‑210‑0150
Sealing of Water Supply Wells in Consolidated Formations 690‑210‑0155
Additional Standards for Artesian Water Supply Wells 690‑210‑0160
Additional Standards for Filter Pack Wells with Surface Casing 690‑210‑0170
Additional Standards for Filter Pack Wells without Surface Casing 690‑210‑0180
Additional Standards for Driven or Jetted Wells 690‑210‑0190
Steel Casing 690‑210‑0200
Steel Casing Joints 690‑210‑0210
Plastic Casing 690‑210‑0220
Plastic Casing Joints 690‑210‑0230
Inner Casing 690‑210‑0240
Casing Shall be Centered 690‑210‑0250
Top Terminal Height 690‑210‑0260
Openings in the Casing 690‑210‑0270
Pitless Well Adapters and Units 690‑210‑0280
Access Ports, Dedicated Measuring Tubes and Airlines 690‑210‑0290
Liner Pipe 690‑210‑0300
Drill Cuttings or Chips 690‑210‑0310
Cement Grout 690‑210‑0315
Concrete 690‑210‑0320
Methods of Placement of Cement Grout or Concrete 690‑210‑0330
Unhydrated Bentonite 690‑210‑0340
Method of Placement of Unhydrated Bentonite 690‑210‑0350
Resumption of Construction Following Placement of Cement Grout 690‑210‑0360
Movement of Casing after Cement Grouting 690‑210‑0370
Well Test 690‑210‑0380
Disinfection of a Well 690‑210‑0390
Completion of Wells 690‑210‑0400
Construction of Dug Wells 690‑210‑0410
Buried Slab Construction 690‑210‑0420
Surface Curbing
Last Updated

Jun. 8, 2021

Rule 690-210-0155’s source at or​.us