Oregon Administrative Rules
Chapter 690 - WATER RESOURCES DEPARTMENT
Division 220 - ABANDONMENT OF WATER SUPPLY WELLS
Section 690-220-0050 - Abandonment of Uncased Wells

Universal Citation: OR Admin Rules 690-220-0050

Current through Register Vol. 63, No. 9, September 1, 2024

(1) Uncased portions of water supply wells to be permanently abandoned shall be completely filled with cement grout, concrete or unhydrated bentonite: (See Figure 220-1) (Figure 220-2)

(2) Uncased portions of water supply wells that penetrate a water-bearing formation may be abandoned with alternating layers of cement grout, concrete or unhydrated bentonite and clean gravel throughout the water-bearing zones in the following manner:

(a) In all cases, non water-bearing zones shall be filled with cement grout, concrete or unhydrated bentonite.

(b) Clean gravel may only be placed in the water-bearing zones verified by an original water supply well report or other documentation acceptable to the Department. A vertical column of gravel that exceeds a total length of 50 feet shall only be placed with prior Department approval. Non water-bearing portions shall be filled with a plug of cement grout, concrete or unhydrated bentonite. Gravel shall not exceed a maximum of 50% of well depth without prior Department approval. Gravel may be placed in multiple water-bearing zones, not to exceed 50 feet for each zone. In no case shall gravel be placed above 18 feet below land surface.

To view attachments referenced in rule text, click here to view rule.

Statutory/Other Authority: ORS 536.090 & ORS 537.505 - 537.795

Statutes/Other Implemented: ORS 536.090 & ORS 537.505 - 537.795

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